linux/drivers/regulator/core.c

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/*
* core.c -- Voltage/Current Regulator framework.
*
* Copyright 2007, 2008 Wolfson Microelectronics PLC.
regulator: core - Rework machine API to remove string based functions. This improves the machine level API in order to configure regulator constraints and consumers as platform data and removes the old string based API that required several calls to set up each regulator. The intention is to create a struct regulator_init_data, populate it's fields with constraints, consumers devices, etc and then register the regulator device from board.c in the standard Linux way. e.g. regulator LDO2 (supplying codec and sim) platform data. /* regulator LDO2 consumer devices */ static struct regulator_consumer_supply ldo2_consumers[] = { { .dev = &platform_audio_device.dev, .supply = "codec_avdd", }, { .dev = &platform_sim_device.dev, .supply = "sim_vcc", } }; /* regulator LDO2 constraints */ static struct regulator_init_data ldo2_data = { .constraints = { .min_uV = 3300000, .max_uV = 3300000, .valid_modes_mask = REGULATOR_MODE_NORMAL, .apply_uV = 1, }, .num_consumer_supplies = ARRAY_SIZE(ldo2_consumers), .consumer_supplies = ldo2_consumers, }; /* machine regulator devices with thier consumers and constraints */ static struct platform_device wm8350_regulator_devices[] = { { .name = "wm8350-regulator", .id = WM8350_LDO_2, .dev = { .platform_data = &ldo2_data, }, }, }; Changes in detail:- o Removed all const char* regulator config functions in machine API. o Created new struct regulator_init_data to contain regulator machine configuration constraints and consmuers. o Changed set_supply(), set_machine_constraints(), set_consumer_device_supply() to remove their string identifier parameters. Also made them static and moved functions nearer top of core.c. o Removed no longer used inline func to_rdev() o Added regulator_get_init_drvdata() to retrieve init data. o Added struct device* as parameter to regulator_register(). o Changed my email address. Signed-off-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2008-10-10 12:22:20 +00:00
* Copyright 2008 SlimLogic Ltd.
*
regulator: core - Rework machine API to remove string based functions. This improves the machine level API in order to configure regulator constraints and consumers as platform data and removes the old string based API that required several calls to set up each regulator. The intention is to create a struct regulator_init_data, populate it's fields with constraints, consumers devices, etc and then register the regulator device from board.c in the standard Linux way. e.g. regulator LDO2 (supplying codec and sim) platform data. /* regulator LDO2 consumer devices */ static struct regulator_consumer_supply ldo2_consumers[] = { { .dev = &platform_audio_device.dev, .supply = "codec_avdd", }, { .dev = &platform_sim_device.dev, .supply = "sim_vcc", } }; /* regulator LDO2 constraints */ static struct regulator_init_data ldo2_data = { .constraints = { .min_uV = 3300000, .max_uV = 3300000, .valid_modes_mask = REGULATOR_MODE_NORMAL, .apply_uV = 1, }, .num_consumer_supplies = ARRAY_SIZE(ldo2_consumers), .consumer_supplies = ldo2_consumers, }; /* machine regulator devices with thier consumers and constraints */ static struct platform_device wm8350_regulator_devices[] = { { .name = "wm8350-regulator", .id = WM8350_LDO_2, .dev = { .platform_data = &ldo2_data, }, }, }; Changes in detail:- o Removed all const char* regulator config functions in machine API. o Created new struct regulator_init_data to contain regulator machine configuration constraints and consmuers. o Changed set_supply(), set_machine_constraints(), set_consumer_device_supply() to remove their string identifier parameters. Also made them static and moved functions nearer top of core.c. o Removed no longer used inline func to_rdev() o Added regulator_get_init_drvdata() to retrieve init data. o Added struct device* as parameter to regulator_register(). o Changed my email address. Signed-off-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2008-10-10 12:22:20 +00:00
* Author: Liam Girdwood <lrg@slimlogic.co.uk>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/debugfs.h>
#include <linux/device.h>
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 08:04:11 +00:00
#include <linux/slab.h>
#include <linux/async.h>
#include <linux/err.h>
#include <linux/mutex.h>
#include <linux/suspend.h>
#include <linux/delay.h>
#include <linux/gpio.h>
#include <linux/gpio/consumer.h>
#include <linux/of.h>
#include <linux/regmap.h>
#include <linux/regulator/of_regulator.h>
#include <linux/regulator/consumer.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/module.h>
#define CREATE_TRACE_POINTS
#include <trace/events/regulator.h>
#include "dummy.h"
#include "internal.h"
#define rdev_crit(rdev, fmt, ...) \
pr_crit("%s: " fmt, rdev_get_name(rdev), ##__VA_ARGS__)
#define rdev_err(rdev, fmt, ...) \
pr_err("%s: " fmt, rdev_get_name(rdev), ##__VA_ARGS__)
#define rdev_warn(rdev, fmt, ...) \
pr_warn("%s: " fmt, rdev_get_name(rdev), ##__VA_ARGS__)
#define rdev_info(rdev, fmt, ...) \
pr_info("%s: " fmt, rdev_get_name(rdev), ##__VA_ARGS__)
#define rdev_dbg(rdev, fmt, ...) \
pr_debug("%s: " fmt, rdev_get_name(rdev), ##__VA_ARGS__)
static DEFINE_MUTEX(regulator_list_mutex);
static LIST_HEAD(regulator_map_list);
2013-02-18 06:50:39 +00:00
static LIST_HEAD(regulator_ena_gpio_list);
static LIST_HEAD(regulator_supply_alias_list);
static bool has_full_constraints;
static struct dentry *debugfs_root;
static struct class regulator_class;
/*
* struct regulator_map
*
* Used to provide symbolic supply names to devices.
*/
struct regulator_map {
struct list_head list;
const char *dev_name; /* The dev_name() for the consumer */
const char *supply;
regulator: core - Rework machine API to remove string based functions. This improves the machine level API in order to configure regulator constraints and consumers as platform data and removes the old string based API that required several calls to set up each regulator. The intention is to create a struct regulator_init_data, populate it's fields with constraints, consumers devices, etc and then register the regulator device from board.c in the standard Linux way. e.g. regulator LDO2 (supplying codec and sim) platform data. /* regulator LDO2 consumer devices */ static struct regulator_consumer_supply ldo2_consumers[] = { { .dev = &platform_audio_device.dev, .supply = "codec_avdd", }, { .dev = &platform_sim_device.dev, .supply = "sim_vcc", } }; /* regulator LDO2 constraints */ static struct regulator_init_data ldo2_data = { .constraints = { .min_uV = 3300000, .max_uV = 3300000, .valid_modes_mask = REGULATOR_MODE_NORMAL, .apply_uV = 1, }, .num_consumer_supplies = ARRAY_SIZE(ldo2_consumers), .consumer_supplies = ldo2_consumers, }; /* machine regulator devices with thier consumers and constraints */ static struct platform_device wm8350_regulator_devices[] = { { .name = "wm8350-regulator", .id = WM8350_LDO_2, .dev = { .platform_data = &ldo2_data, }, }, }; Changes in detail:- o Removed all const char* regulator config functions in machine API. o Created new struct regulator_init_data to contain regulator machine configuration constraints and consmuers. o Changed set_supply(), set_machine_constraints(), set_consumer_device_supply() to remove their string identifier parameters. Also made them static and moved functions nearer top of core.c. o Removed no longer used inline func to_rdev() o Added regulator_get_init_drvdata() to retrieve init data. o Added struct device* as parameter to regulator_register(). o Changed my email address. Signed-off-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2008-10-10 12:22:20 +00:00
struct regulator_dev *regulator;
};
2013-02-18 06:50:39 +00:00
/*
* struct regulator_enable_gpio
*
* Management for shared enable GPIO pin
*/
struct regulator_enable_gpio {
struct list_head list;
struct gpio_desc *gpiod;
2013-02-18 06:50:39 +00:00
u32 enable_count; /* a number of enabled shared GPIO */
u32 request_count; /* a number of requested shared GPIO */
unsigned int ena_gpio_invert:1;
};
/*
* struct regulator_supply_alias
*
* Used to map lookups for a supply onto an alternative device.
*/
struct regulator_supply_alias {
struct list_head list;
struct device *src_dev;
const char *src_supply;
struct device *alias_dev;
const char *alias_supply;
};
static int _regulator_is_enabled(struct regulator_dev *rdev);
static int _regulator_disable(struct regulator_dev *rdev);
static int _regulator_get_voltage(struct regulator_dev *rdev);
static int _regulator_get_current_limit(struct regulator_dev *rdev);
static unsigned int _regulator_get_mode(struct regulator_dev *rdev);
static int _notifier_call_chain(struct regulator_dev *rdev,
unsigned long event, void *data);
static int _regulator_do_set_voltage(struct regulator_dev *rdev,
int min_uV, int max_uV);
static struct regulator *create_regulator(struct regulator_dev *rdev,
struct device *dev,
const char *supply_name);
static void _regulator_put(struct regulator *regulator);
static struct regulator_dev *dev_to_rdev(struct device *dev)
{
return container_of(dev, struct regulator_dev, dev);
}
static const char *rdev_get_name(struct regulator_dev *rdev)
{
if (rdev->constraints && rdev->constraints->name)
return rdev->constraints->name;
else if (rdev->desc->name)
return rdev->desc->name;
else
return "";
}
static bool have_full_constraints(void)
{
return has_full_constraints || of_have_populated_dt();
}
static bool regulator_ops_is_valid(struct regulator_dev *rdev, int ops)
{
if (!rdev->constraints) {
rdev_err(rdev, "no constraints\n");
return false;
}
if (rdev->constraints->valid_ops_mask & ops)
return true;
return false;
}
static inline struct regulator_dev *rdev_get_supply(struct regulator_dev *rdev)
{
if (rdev && rdev->supply)
return rdev->supply->rdev;
return NULL;
}
/**
* regulator_lock_supply - lock a regulator and its supplies
* @rdev: regulator source
*/
static void regulator_lock_supply(struct regulator_dev *rdev)
{
int i;
for (i = 0; rdev; rdev = rdev_get_supply(rdev), i++)
mutex_lock_nested(&rdev->mutex, i);
}
/**
* regulator_unlock_supply - unlock a regulator and its supplies
* @rdev: regulator source
*/
static void regulator_unlock_supply(struct regulator_dev *rdev)
{
struct regulator *supply;
while (1) {
mutex_unlock(&rdev->mutex);
supply = rdev->supply;
if (!rdev->supply)
return;
rdev = supply->rdev;
}
}
/**
* of_get_regulator - get a regulator device node based on supply name
* @dev: Device pointer for the consumer (of regulator) device
* @supply: regulator supply name
*
* Extract the regulator device node corresponding to the supply name.
* returns the device node corresponding to the regulator if found, else
* returns NULL.
*/
static struct device_node *of_get_regulator(struct device *dev, const char *supply)
{
struct device_node *regnode = NULL;
char prop_name[32]; /* 32 is max size of property name */
dev_dbg(dev, "Looking up %s-supply from device tree\n", supply);
snprintf(prop_name, 32, "%s-supply", supply);
regnode = of_parse_phandle(dev->of_node, prop_name, 0);
if (!regnode) {
dev_dbg(dev, "Looking up %s property in node %s failed",
prop_name, dev->of_node->full_name);
return NULL;
}
return regnode;
}
/* Platform voltage constraint check */
static int regulator_check_voltage(struct regulator_dev *rdev,
int *min_uV, int *max_uV)
{
BUG_ON(*min_uV > *max_uV);
if (!regulator_ops_is_valid(rdev, REGULATOR_CHANGE_VOLTAGE)) {
rdev_err(rdev, "voltage operation not allowed\n");
return -EPERM;
}
if (*max_uV > rdev->constraints->max_uV)
*max_uV = rdev->constraints->max_uV;
if (*min_uV < rdev->constraints->min_uV)
*min_uV = rdev->constraints->min_uV;
if (*min_uV > *max_uV) {
rdev_err(rdev, "unsupportable voltage range: %d-%duV\n",
*min_uV, *max_uV);
return -EINVAL;
}
return 0;
}
/* Make sure we select a voltage that suits the needs of all
* regulator consumers
*/
static int regulator_check_consumers(struct regulator_dev *rdev,
int *min_uV, int *max_uV)
{
struct regulator *regulator;
list_for_each_entry(regulator, &rdev->consumer_list, list) {
/*
* Assume consumers that didn't say anything are OK
* with anything in the constraint range.
*/
if (!regulator->min_uV && !regulator->max_uV)
continue;
if (*max_uV > regulator->max_uV)
*max_uV = regulator->max_uV;
if (*min_uV < regulator->min_uV)
*min_uV = regulator->min_uV;
}
if (*min_uV > *max_uV) {
rdev_err(rdev, "Restricting voltage, %u-%uuV\n",
*min_uV, *max_uV);
return -EINVAL;
}
return 0;
}
/* current constraint check */
static int regulator_check_current_limit(struct regulator_dev *rdev,
int *min_uA, int *max_uA)
{
BUG_ON(*min_uA > *max_uA);
if (!regulator_ops_is_valid(rdev, REGULATOR_CHANGE_CURRENT)) {
rdev_err(rdev, "current operation not allowed\n");
return -EPERM;
}
if (*max_uA > rdev->constraints->max_uA)
*max_uA = rdev->constraints->max_uA;
if (*min_uA < rdev->constraints->min_uA)
*min_uA = rdev->constraints->min_uA;
if (*min_uA > *max_uA) {
rdev_err(rdev, "unsupportable current range: %d-%duA\n",
*min_uA, *max_uA);
return -EINVAL;
}
return 0;
}
/* operating mode constraint check */
static int regulator_mode_constrain(struct regulator_dev *rdev, int *mode)
{
switch (*mode) {
case REGULATOR_MODE_FAST:
case REGULATOR_MODE_NORMAL:
case REGULATOR_MODE_IDLE:
case REGULATOR_MODE_STANDBY:
break;
default:
rdev_err(rdev, "invalid mode %x specified\n", *mode);
return -EINVAL;
}
if (!regulator_ops_is_valid(rdev, REGULATOR_CHANGE_MODE)) {
rdev_err(rdev, "mode operation not allowed\n");
return -EPERM;
}
/* The modes are bitmasks, the most power hungry modes having
* the lowest values. If the requested mode isn't supported
* try higher modes. */
while (*mode) {
if (rdev->constraints->valid_modes_mask & *mode)
return 0;
*mode /= 2;
}
return -EINVAL;
}
static ssize_t regulator_uV_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
regulator: core - Rework machine API to remove string based functions. This improves the machine level API in order to configure regulator constraints and consumers as platform data and removes the old string based API that required several calls to set up each regulator. The intention is to create a struct regulator_init_data, populate it's fields with constraints, consumers devices, etc and then register the regulator device from board.c in the standard Linux way. e.g. regulator LDO2 (supplying codec and sim) platform data. /* regulator LDO2 consumer devices */ static struct regulator_consumer_supply ldo2_consumers[] = { { .dev = &platform_audio_device.dev, .supply = "codec_avdd", }, { .dev = &platform_sim_device.dev, .supply = "sim_vcc", } }; /* regulator LDO2 constraints */ static struct regulator_init_data ldo2_data = { .constraints = { .min_uV = 3300000, .max_uV = 3300000, .valid_modes_mask = REGULATOR_MODE_NORMAL, .apply_uV = 1, }, .num_consumer_supplies = ARRAY_SIZE(ldo2_consumers), .consumer_supplies = ldo2_consumers, }; /* machine regulator devices with thier consumers and constraints */ static struct platform_device wm8350_regulator_devices[] = { { .name = "wm8350-regulator", .id = WM8350_LDO_2, .dev = { .platform_data = &ldo2_data, }, }, }; Changes in detail:- o Removed all const char* regulator config functions in machine API. o Created new struct regulator_init_data to contain regulator machine configuration constraints and consmuers. o Changed set_supply(), set_machine_constraints(), set_consumer_device_supply() to remove their string identifier parameters. Also made them static and moved functions nearer top of core.c. o Removed no longer used inline func to_rdev() o Added regulator_get_init_drvdata() to retrieve init data. o Added struct device* as parameter to regulator_register(). o Changed my email address. Signed-off-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2008-10-10 12:22:20 +00:00
struct regulator_dev *rdev = dev_get_drvdata(dev);
ssize_t ret;
mutex_lock(&rdev->mutex);
ret = sprintf(buf, "%d\n", _regulator_get_voltage(rdev));
mutex_unlock(&rdev->mutex);
return ret;
}
static DEVICE_ATTR(microvolts, 0444, regulator_uV_show, NULL);
static ssize_t regulator_uA_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
regulator: core - Rework machine API to remove string based functions. This improves the machine level API in order to configure regulator constraints and consumers as platform data and removes the old string based API that required several calls to set up each regulator. The intention is to create a struct regulator_init_data, populate it's fields with constraints, consumers devices, etc and then register the regulator device from board.c in the standard Linux way. e.g. regulator LDO2 (supplying codec and sim) platform data. /* regulator LDO2 consumer devices */ static struct regulator_consumer_supply ldo2_consumers[] = { { .dev = &platform_audio_device.dev, .supply = "codec_avdd", }, { .dev = &platform_sim_device.dev, .supply = "sim_vcc", } }; /* regulator LDO2 constraints */ static struct regulator_init_data ldo2_data = { .constraints = { .min_uV = 3300000, .max_uV = 3300000, .valid_modes_mask = REGULATOR_MODE_NORMAL, .apply_uV = 1, }, .num_consumer_supplies = ARRAY_SIZE(ldo2_consumers), .consumer_supplies = ldo2_consumers, }; /* machine regulator devices with thier consumers and constraints */ static struct platform_device wm8350_regulator_devices[] = { { .name = "wm8350-regulator", .id = WM8350_LDO_2, .dev = { .platform_data = &ldo2_data, }, }, }; Changes in detail:- o Removed all const char* regulator config functions in machine API. o Created new struct regulator_init_data to contain regulator machine configuration constraints and consmuers. o Changed set_supply(), set_machine_constraints(), set_consumer_device_supply() to remove their string identifier parameters. Also made them static and moved functions nearer top of core.c. o Removed no longer used inline func to_rdev() o Added regulator_get_init_drvdata() to retrieve init data. o Added struct device* as parameter to regulator_register(). o Changed my email address. Signed-off-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2008-10-10 12:22:20 +00:00
struct regulator_dev *rdev = dev_get_drvdata(dev);
return sprintf(buf, "%d\n", _regulator_get_current_limit(rdev));
}
static DEVICE_ATTR(microamps, 0444, regulator_uA_show, NULL);
static ssize_t name_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct regulator_dev *rdev = dev_get_drvdata(dev);
return sprintf(buf, "%s\n", rdev_get_name(rdev));
}
static DEVICE_ATTR_RO(name);
static ssize_t regulator_print_opmode(char *buf, int mode)
{
switch (mode) {
case REGULATOR_MODE_FAST:
return sprintf(buf, "fast\n");
case REGULATOR_MODE_NORMAL:
return sprintf(buf, "normal\n");
case REGULATOR_MODE_IDLE:
return sprintf(buf, "idle\n");
case REGULATOR_MODE_STANDBY:
return sprintf(buf, "standby\n");
}
return sprintf(buf, "unknown\n");
}
static ssize_t regulator_opmode_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
regulator: core - Rework machine API to remove string based functions. This improves the machine level API in order to configure regulator constraints and consumers as platform data and removes the old string based API that required several calls to set up each regulator. The intention is to create a struct regulator_init_data, populate it's fields with constraints, consumers devices, etc and then register the regulator device from board.c in the standard Linux way. e.g. regulator LDO2 (supplying codec and sim) platform data. /* regulator LDO2 consumer devices */ static struct regulator_consumer_supply ldo2_consumers[] = { { .dev = &platform_audio_device.dev, .supply = "codec_avdd", }, { .dev = &platform_sim_device.dev, .supply = "sim_vcc", } }; /* regulator LDO2 constraints */ static struct regulator_init_data ldo2_data = { .constraints = { .min_uV = 3300000, .max_uV = 3300000, .valid_modes_mask = REGULATOR_MODE_NORMAL, .apply_uV = 1, }, .num_consumer_supplies = ARRAY_SIZE(ldo2_consumers), .consumer_supplies = ldo2_consumers, }; /* machine regulator devices with thier consumers and constraints */ static struct platform_device wm8350_regulator_devices[] = { { .name = "wm8350-regulator", .id = WM8350_LDO_2, .dev = { .platform_data = &ldo2_data, }, }, }; Changes in detail:- o Removed all const char* regulator config functions in machine API. o Created new struct regulator_init_data to contain regulator machine configuration constraints and consmuers. o Changed set_supply(), set_machine_constraints(), set_consumer_device_supply() to remove their string identifier parameters. Also made them static and moved functions nearer top of core.c. o Removed no longer used inline func to_rdev() o Added regulator_get_init_drvdata() to retrieve init data. o Added struct device* as parameter to regulator_register(). o Changed my email address. Signed-off-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2008-10-10 12:22:20 +00:00
struct regulator_dev *rdev = dev_get_drvdata(dev);
return regulator_print_opmode(buf, _regulator_get_mode(rdev));
}
static DEVICE_ATTR(opmode, 0444, regulator_opmode_show, NULL);
static ssize_t regulator_print_state(char *buf, int state)
{
if (state > 0)
return sprintf(buf, "enabled\n");
else if (state == 0)
return sprintf(buf, "disabled\n");
else
return sprintf(buf, "unknown\n");
}
static ssize_t regulator_state_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct regulator_dev *rdev = dev_get_drvdata(dev);
ssize_t ret;
mutex_lock(&rdev->mutex);
ret = regulator_print_state(buf, _regulator_is_enabled(rdev));
mutex_unlock(&rdev->mutex);
return ret;
}
static DEVICE_ATTR(state, 0444, regulator_state_show, NULL);
static ssize_t regulator_status_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct regulator_dev *rdev = dev_get_drvdata(dev);
int status;
char *label;
status = rdev->desc->ops->get_status(rdev);
if (status < 0)
return status;
switch (status) {
case REGULATOR_STATUS_OFF:
label = "off";
break;
case REGULATOR_STATUS_ON:
label = "on";
break;
case REGULATOR_STATUS_ERROR:
label = "error";
break;
case REGULATOR_STATUS_FAST:
label = "fast";
break;
case REGULATOR_STATUS_NORMAL:
label = "normal";
break;
case REGULATOR_STATUS_IDLE:
label = "idle";
break;
case REGULATOR_STATUS_STANDBY:
label = "standby";
break;
case REGULATOR_STATUS_BYPASS:
label = "bypass";
break;
case REGULATOR_STATUS_UNDEFINED:
label = "undefined";
break;
default:
return -ERANGE;
}
return sprintf(buf, "%s\n", label);
}
static DEVICE_ATTR(status, 0444, regulator_status_show, NULL);
static ssize_t regulator_min_uA_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
regulator: core - Rework machine API to remove string based functions. This improves the machine level API in order to configure regulator constraints and consumers as platform data and removes the old string based API that required several calls to set up each regulator. The intention is to create a struct regulator_init_data, populate it's fields with constraints, consumers devices, etc and then register the regulator device from board.c in the standard Linux way. e.g. regulator LDO2 (supplying codec and sim) platform data. /* regulator LDO2 consumer devices */ static struct regulator_consumer_supply ldo2_consumers[] = { { .dev = &platform_audio_device.dev, .supply = "codec_avdd", }, { .dev = &platform_sim_device.dev, .supply = "sim_vcc", } }; /* regulator LDO2 constraints */ static struct regulator_init_data ldo2_data = { .constraints = { .min_uV = 3300000, .max_uV = 3300000, .valid_modes_mask = REGULATOR_MODE_NORMAL, .apply_uV = 1, }, .num_consumer_supplies = ARRAY_SIZE(ldo2_consumers), .consumer_supplies = ldo2_consumers, }; /* machine regulator devices with thier consumers and constraints */ static struct platform_device wm8350_regulator_devices[] = { { .name = "wm8350-regulator", .id = WM8350_LDO_2, .dev = { .platform_data = &ldo2_data, }, }, }; Changes in detail:- o Removed all const char* regulator config functions in machine API. o Created new struct regulator_init_data to contain regulator machine configuration constraints and consmuers. o Changed set_supply(), set_machine_constraints(), set_consumer_device_supply() to remove their string identifier parameters. Also made them static and moved functions nearer top of core.c. o Removed no longer used inline func to_rdev() o Added regulator_get_init_drvdata() to retrieve init data. o Added struct device* as parameter to regulator_register(). o Changed my email address. Signed-off-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2008-10-10 12:22:20 +00:00
struct regulator_dev *rdev = dev_get_drvdata(dev);
if (!rdev->constraints)
return sprintf(buf, "constraint not defined\n");
return sprintf(buf, "%d\n", rdev->constraints->min_uA);
}
static DEVICE_ATTR(min_microamps, 0444, regulator_min_uA_show, NULL);
static ssize_t regulator_max_uA_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
regulator: core - Rework machine API to remove string based functions. This improves the machine level API in order to configure regulator constraints and consumers as platform data and removes the old string based API that required several calls to set up each regulator. The intention is to create a struct regulator_init_data, populate it's fields with constraints, consumers devices, etc and then register the regulator device from board.c in the standard Linux way. e.g. regulator LDO2 (supplying codec and sim) platform data. /* regulator LDO2 consumer devices */ static struct regulator_consumer_supply ldo2_consumers[] = { { .dev = &platform_audio_device.dev, .supply = "codec_avdd", }, { .dev = &platform_sim_device.dev, .supply = "sim_vcc", } }; /* regulator LDO2 constraints */ static struct regulator_init_data ldo2_data = { .constraints = { .min_uV = 3300000, .max_uV = 3300000, .valid_modes_mask = REGULATOR_MODE_NORMAL, .apply_uV = 1, }, .num_consumer_supplies = ARRAY_SIZE(ldo2_consumers), .consumer_supplies = ldo2_consumers, }; /* machine regulator devices with thier consumers and constraints */ static struct platform_device wm8350_regulator_devices[] = { { .name = "wm8350-regulator", .id = WM8350_LDO_2, .dev = { .platform_data = &ldo2_data, }, }, }; Changes in detail:- o Removed all const char* regulator config functions in machine API. o Created new struct regulator_init_data to contain regulator machine configuration constraints and consmuers. o Changed set_supply(), set_machine_constraints(), set_consumer_device_supply() to remove their string identifier parameters. Also made them static and moved functions nearer top of core.c. o Removed no longer used inline func to_rdev() o Added regulator_get_init_drvdata() to retrieve init data. o Added struct device* as parameter to regulator_register(). o Changed my email address. Signed-off-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2008-10-10 12:22:20 +00:00
struct regulator_dev *rdev = dev_get_drvdata(dev);
if (!rdev->constraints)
return sprintf(buf, "constraint not defined\n");
return sprintf(buf, "%d\n", rdev->constraints->max_uA);
}
static DEVICE_ATTR(max_microamps, 0444, regulator_max_uA_show, NULL);
static ssize_t regulator_min_uV_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
regulator: core - Rework machine API to remove string based functions. This improves the machine level API in order to configure regulator constraints and consumers as platform data and removes the old string based API that required several calls to set up each regulator. The intention is to create a struct regulator_init_data, populate it's fields with constraints, consumers devices, etc and then register the regulator device from board.c in the standard Linux way. e.g. regulator LDO2 (supplying codec and sim) platform data. /* regulator LDO2 consumer devices */ static struct regulator_consumer_supply ldo2_consumers[] = { { .dev = &platform_audio_device.dev, .supply = "codec_avdd", }, { .dev = &platform_sim_device.dev, .supply = "sim_vcc", } }; /* regulator LDO2 constraints */ static struct regulator_init_data ldo2_data = { .constraints = { .min_uV = 3300000, .max_uV = 3300000, .valid_modes_mask = REGULATOR_MODE_NORMAL, .apply_uV = 1, }, .num_consumer_supplies = ARRAY_SIZE(ldo2_consumers), .consumer_supplies = ldo2_consumers, }; /* machine regulator devices with thier consumers and constraints */ static struct platform_device wm8350_regulator_devices[] = { { .name = "wm8350-regulator", .id = WM8350_LDO_2, .dev = { .platform_data = &ldo2_data, }, }, }; Changes in detail:- o Removed all const char* regulator config functions in machine API. o Created new struct regulator_init_data to contain regulator machine configuration constraints and consmuers. o Changed set_supply(), set_machine_constraints(), set_consumer_device_supply() to remove their string identifier parameters. Also made them static and moved functions nearer top of core.c. o Removed no longer used inline func to_rdev() o Added regulator_get_init_drvdata() to retrieve init data. o Added struct device* as parameter to regulator_register(). o Changed my email address. Signed-off-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2008-10-10 12:22:20 +00:00
struct regulator_dev *rdev = dev_get_drvdata(dev);
if (!rdev->constraints)
return sprintf(buf, "constraint not defined\n");
return sprintf(buf, "%d\n", rdev->constraints->min_uV);
}
static DEVICE_ATTR(min_microvolts, 0444, regulator_min_uV_show, NULL);
static ssize_t regulator_max_uV_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
regulator: core - Rework machine API to remove string based functions. This improves the machine level API in order to configure regulator constraints and consumers as platform data and removes the old string based API that required several calls to set up each regulator. The intention is to create a struct regulator_init_data, populate it's fields with constraints, consumers devices, etc and then register the regulator device from board.c in the standard Linux way. e.g. regulator LDO2 (supplying codec and sim) platform data. /* regulator LDO2 consumer devices */ static struct regulator_consumer_supply ldo2_consumers[] = { { .dev = &platform_audio_device.dev, .supply = "codec_avdd", }, { .dev = &platform_sim_device.dev, .supply = "sim_vcc", } }; /* regulator LDO2 constraints */ static struct regulator_init_data ldo2_data = { .constraints = { .min_uV = 3300000, .max_uV = 3300000, .valid_modes_mask = REGULATOR_MODE_NORMAL, .apply_uV = 1, }, .num_consumer_supplies = ARRAY_SIZE(ldo2_consumers), .consumer_supplies = ldo2_consumers, }; /* machine regulator devices with thier consumers and constraints */ static struct platform_device wm8350_regulator_devices[] = { { .name = "wm8350-regulator", .id = WM8350_LDO_2, .dev = { .platform_data = &ldo2_data, }, }, }; Changes in detail:- o Removed all const char* regulator config functions in machine API. o Created new struct regulator_init_data to contain regulator machine configuration constraints and consmuers. o Changed set_supply(), set_machine_constraints(), set_consumer_device_supply() to remove their string identifier parameters. Also made them static and moved functions nearer top of core.c. o Removed no longer used inline func to_rdev() o Added regulator_get_init_drvdata() to retrieve init data. o Added struct device* as parameter to regulator_register(). o Changed my email address. Signed-off-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2008-10-10 12:22:20 +00:00
struct regulator_dev *rdev = dev_get_drvdata(dev);
if (!rdev->constraints)
return sprintf(buf, "constraint not defined\n");
return sprintf(buf, "%d\n", rdev->constraints->max_uV);
}
static DEVICE_ATTR(max_microvolts, 0444, regulator_max_uV_show, NULL);
static ssize_t regulator_total_uA_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
regulator: core - Rework machine API to remove string based functions. This improves the machine level API in order to configure regulator constraints and consumers as platform data and removes the old string based API that required several calls to set up each regulator. The intention is to create a struct regulator_init_data, populate it's fields with constraints, consumers devices, etc and then register the regulator device from board.c in the standard Linux way. e.g. regulator LDO2 (supplying codec and sim) platform data. /* regulator LDO2 consumer devices */ static struct regulator_consumer_supply ldo2_consumers[] = { { .dev = &platform_audio_device.dev, .supply = "codec_avdd", }, { .dev = &platform_sim_device.dev, .supply = "sim_vcc", } }; /* regulator LDO2 constraints */ static struct regulator_init_data ldo2_data = { .constraints = { .min_uV = 3300000, .max_uV = 3300000, .valid_modes_mask = REGULATOR_MODE_NORMAL, .apply_uV = 1, }, .num_consumer_supplies = ARRAY_SIZE(ldo2_consumers), .consumer_supplies = ldo2_consumers, }; /* machine regulator devices with thier consumers and constraints */ static struct platform_device wm8350_regulator_devices[] = { { .name = "wm8350-regulator", .id = WM8350_LDO_2, .dev = { .platform_data = &ldo2_data, }, }, }; Changes in detail:- o Removed all const char* regulator config functions in machine API. o Created new struct regulator_init_data to contain regulator machine configuration constraints and consmuers. o Changed set_supply(), set_machine_constraints(), set_consumer_device_supply() to remove their string identifier parameters. Also made them static and moved functions nearer top of core.c. o Removed no longer used inline func to_rdev() o Added regulator_get_init_drvdata() to retrieve init data. o Added struct device* as parameter to regulator_register(). o Changed my email address. Signed-off-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2008-10-10 12:22:20 +00:00
struct regulator_dev *rdev = dev_get_drvdata(dev);
struct regulator *regulator;
int uA = 0;
mutex_lock(&rdev->mutex);
list_for_each_entry(regulator, &rdev->consumer_list, list)
uA += regulator->uA_load;
mutex_unlock(&rdev->mutex);
return sprintf(buf, "%d\n", uA);
}
static DEVICE_ATTR(requested_microamps, 0444, regulator_total_uA_show, NULL);
static ssize_t num_users_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
regulator: core - Rework machine API to remove string based functions. This improves the machine level API in order to configure regulator constraints and consumers as platform data and removes the old string based API that required several calls to set up each regulator. The intention is to create a struct regulator_init_data, populate it's fields with constraints, consumers devices, etc and then register the regulator device from board.c in the standard Linux way. e.g. regulator LDO2 (supplying codec and sim) platform data. /* regulator LDO2 consumer devices */ static struct regulator_consumer_supply ldo2_consumers[] = { { .dev = &platform_audio_device.dev, .supply = "codec_avdd", }, { .dev = &platform_sim_device.dev, .supply = "sim_vcc", } }; /* regulator LDO2 constraints */ static struct regulator_init_data ldo2_data = { .constraints = { .min_uV = 3300000, .max_uV = 3300000, .valid_modes_mask = REGULATOR_MODE_NORMAL, .apply_uV = 1, }, .num_consumer_supplies = ARRAY_SIZE(ldo2_consumers), .consumer_supplies = ldo2_consumers, }; /* machine regulator devices with thier consumers and constraints */ static struct platform_device wm8350_regulator_devices[] = { { .name = "wm8350-regulator", .id = WM8350_LDO_2, .dev = { .platform_data = &ldo2_data, }, }, }; Changes in detail:- o Removed all const char* regulator config functions in machine API. o Created new struct regulator_init_data to contain regulator machine configuration constraints and consmuers. o Changed set_supply(), set_machine_constraints(), set_consumer_device_supply() to remove their string identifier parameters. Also made them static and moved functions nearer top of core.c. o Removed no longer used inline func to_rdev() o Added regulator_get_init_drvdata() to retrieve init data. o Added struct device* as parameter to regulator_register(). o Changed my email address. Signed-off-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2008-10-10 12:22:20 +00:00
struct regulator_dev *rdev = dev_get_drvdata(dev);
return sprintf(buf, "%d\n", rdev->use_count);
}
static DEVICE_ATTR_RO(num_users);
static ssize_t type_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
regulator: core - Rework machine API to remove string based functions. This improves the machine level API in order to configure regulator constraints and consumers as platform data and removes the old string based API that required several calls to set up each regulator. The intention is to create a struct regulator_init_data, populate it's fields with constraints, consumers devices, etc and then register the regulator device from board.c in the standard Linux way. e.g. regulator LDO2 (supplying codec and sim) platform data. /* regulator LDO2 consumer devices */ static struct regulator_consumer_supply ldo2_consumers[] = { { .dev = &platform_audio_device.dev, .supply = "codec_avdd", }, { .dev = &platform_sim_device.dev, .supply = "sim_vcc", } }; /* regulator LDO2 constraints */ static struct regulator_init_data ldo2_data = { .constraints = { .min_uV = 3300000, .max_uV = 3300000, .valid_modes_mask = REGULATOR_MODE_NORMAL, .apply_uV = 1, }, .num_consumer_supplies = ARRAY_SIZE(ldo2_consumers), .consumer_supplies = ldo2_consumers, }; /* machine regulator devices with thier consumers and constraints */ static struct platform_device wm8350_regulator_devices[] = { { .name = "wm8350-regulator", .id = WM8350_LDO_2, .dev = { .platform_data = &ldo2_data, }, }, }; Changes in detail:- o Removed all const char* regulator config functions in machine API. o Created new struct regulator_init_data to contain regulator machine configuration constraints and consmuers. o Changed set_supply(), set_machine_constraints(), set_consumer_device_supply() to remove their string identifier parameters. Also made them static and moved functions nearer top of core.c. o Removed no longer used inline func to_rdev() o Added regulator_get_init_drvdata() to retrieve init data. o Added struct device* as parameter to regulator_register(). o Changed my email address. Signed-off-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2008-10-10 12:22:20 +00:00
struct regulator_dev *rdev = dev_get_drvdata(dev);
switch (rdev->desc->type) {
case REGULATOR_VOLTAGE:
return sprintf(buf, "voltage\n");
case REGULATOR_CURRENT:
return sprintf(buf, "current\n");
}
return sprintf(buf, "unknown\n");
}
static DEVICE_ATTR_RO(type);
static ssize_t regulator_suspend_mem_uV_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
regulator: core - Rework machine API to remove string based functions. This improves the machine level API in order to configure regulator constraints and consumers as platform data and removes the old string based API that required several calls to set up each regulator. The intention is to create a struct regulator_init_data, populate it's fields with constraints, consumers devices, etc and then register the regulator device from board.c in the standard Linux way. e.g. regulator LDO2 (supplying codec and sim) platform data. /* regulator LDO2 consumer devices */ static struct regulator_consumer_supply ldo2_consumers[] = { { .dev = &platform_audio_device.dev, .supply = "codec_avdd", }, { .dev = &platform_sim_device.dev, .supply = "sim_vcc", } }; /* regulator LDO2 constraints */ static struct regulator_init_data ldo2_data = { .constraints = { .min_uV = 3300000, .max_uV = 3300000, .valid_modes_mask = REGULATOR_MODE_NORMAL, .apply_uV = 1, }, .num_consumer_supplies = ARRAY_SIZE(ldo2_consumers), .consumer_supplies = ldo2_consumers, }; /* machine regulator devices with thier consumers and constraints */ static struct platform_device wm8350_regulator_devices[] = { { .name = "wm8350-regulator", .id = WM8350_LDO_2, .dev = { .platform_data = &ldo2_data, }, }, }; Changes in detail:- o Removed all const char* regulator config functions in machine API. o Created new struct regulator_init_data to contain regulator machine configuration constraints and consmuers. o Changed set_supply(), set_machine_constraints(), set_consumer_device_supply() to remove their string identifier parameters. Also made them static and moved functions nearer top of core.c. o Removed no longer used inline func to_rdev() o Added regulator_get_init_drvdata() to retrieve init data. o Added struct device* as parameter to regulator_register(). o Changed my email address. Signed-off-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2008-10-10 12:22:20 +00:00
struct regulator_dev *rdev = dev_get_drvdata(dev);
return sprintf(buf, "%d\n", rdev->constraints->state_mem.uV);
}
static DEVICE_ATTR(suspend_mem_microvolts, 0444,
regulator_suspend_mem_uV_show, NULL);
static ssize_t regulator_suspend_disk_uV_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
regulator: core - Rework machine API to remove string based functions. This improves the machine level API in order to configure regulator constraints and consumers as platform data and removes the old string based API that required several calls to set up each regulator. The intention is to create a struct regulator_init_data, populate it's fields with constraints, consumers devices, etc and then register the regulator device from board.c in the standard Linux way. e.g. regulator LDO2 (supplying codec and sim) platform data. /* regulator LDO2 consumer devices */ static struct regulator_consumer_supply ldo2_consumers[] = { { .dev = &platform_audio_device.dev, .supply = "codec_avdd", }, { .dev = &platform_sim_device.dev, .supply = "sim_vcc", } }; /* regulator LDO2 constraints */ static struct regulator_init_data ldo2_data = { .constraints = { .min_uV = 3300000, .max_uV = 3300000, .valid_modes_mask = REGULATOR_MODE_NORMAL, .apply_uV = 1, }, .num_consumer_supplies = ARRAY_SIZE(ldo2_consumers), .consumer_supplies = ldo2_consumers, }; /* machine regulator devices with thier consumers and constraints */ static struct platform_device wm8350_regulator_devices[] = { { .name = "wm8350-regulator", .id = WM8350_LDO_2, .dev = { .platform_data = &ldo2_data, }, }, }; Changes in detail:- o Removed all const char* regulator config functions in machine API. o Created new struct regulator_init_data to contain regulator machine configuration constraints and consmuers. o Changed set_supply(), set_machine_constraints(), set_consumer_device_supply() to remove their string identifier parameters. Also made them static and moved functions nearer top of core.c. o Removed no longer used inline func to_rdev() o Added regulator_get_init_drvdata() to retrieve init data. o Added struct device* as parameter to regulator_register(). o Changed my email address. Signed-off-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2008-10-10 12:22:20 +00:00
struct regulator_dev *rdev = dev_get_drvdata(dev);
return sprintf(buf, "%d\n", rdev->constraints->state_disk.uV);
}
static DEVICE_ATTR(suspend_disk_microvolts, 0444,
regulator_suspend_disk_uV_show, NULL);
static ssize_t regulator_suspend_standby_uV_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
regulator: core - Rework machine API to remove string based functions. This improves the machine level API in order to configure regulator constraints and consumers as platform data and removes the old string based API that required several calls to set up each regulator. The intention is to create a struct regulator_init_data, populate it's fields with constraints, consumers devices, etc and then register the regulator device from board.c in the standard Linux way. e.g. regulator LDO2 (supplying codec and sim) platform data. /* regulator LDO2 consumer devices */ static struct regulator_consumer_supply ldo2_consumers[] = { { .dev = &platform_audio_device.dev, .supply = "codec_avdd", }, { .dev = &platform_sim_device.dev, .supply = "sim_vcc", } }; /* regulator LDO2 constraints */ static struct regulator_init_data ldo2_data = { .constraints = { .min_uV = 3300000, .max_uV = 3300000, .valid_modes_mask = REGULATOR_MODE_NORMAL, .apply_uV = 1, }, .num_consumer_supplies = ARRAY_SIZE(ldo2_consumers), .consumer_supplies = ldo2_consumers, }; /* machine regulator devices with thier consumers and constraints */ static struct platform_device wm8350_regulator_devices[] = { { .name = "wm8350-regulator", .id = WM8350_LDO_2, .dev = { .platform_data = &ldo2_data, }, }, }; Changes in detail:- o Removed all const char* regulator config functions in machine API. o Created new struct regulator_init_data to contain regulator machine configuration constraints and consmuers. o Changed set_supply(), set_machine_constraints(), set_consumer_device_supply() to remove their string identifier parameters. Also made them static and moved functions nearer top of core.c. o Removed no longer used inline func to_rdev() o Added regulator_get_init_drvdata() to retrieve init data. o Added struct device* as parameter to regulator_register(). o Changed my email address. Signed-off-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2008-10-10 12:22:20 +00:00
struct regulator_dev *rdev = dev_get_drvdata(dev);
return sprintf(buf, "%d\n", rdev->constraints->state_standby.uV);
}
static DEVICE_ATTR(suspend_standby_microvolts, 0444,
regulator_suspend_standby_uV_show, NULL);
static ssize_t regulator_suspend_mem_mode_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
regulator: core - Rework machine API to remove string based functions. This improves the machine level API in order to configure regulator constraints and consumers as platform data and removes the old string based API that required several calls to set up each regulator. The intention is to create a struct regulator_init_data, populate it's fields with constraints, consumers devices, etc and then register the regulator device from board.c in the standard Linux way. e.g. regulator LDO2 (supplying codec and sim) platform data. /* regulator LDO2 consumer devices */ static struct regulator_consumer_supply ldo2_consumers[] = { { .dev = &platform_audio_device.dev, .supply = "codec_avdd", }, { .dev = &platform_sim_device.dev, .supply = "sim_vcc", } }; /* regulator LDO2 constraints */ static struct regulator_init_data ldo2_data = { .constraints = { .min_uV = 3300000, .max_uV = 3300000, .valid_modes_mask = REGULATOR_MODE_NORMAL, .apply_uV = 1, }, .num_consumer_supplies = ARRAY_SIZE(ldo2_consumers), .consumer_supplies = ldo2_consumers, }; /* machine regulator devices with thier consumers and constraints */ static struct platform_device wm8350_regulator_devices[] = { { .name = "wm8350-regulator", .id = WM8350_LDO_2, .dev = { .platform_data = &ldo2_data, }, }, }; Changes in detail:- o Removed all const char* regulator config functions in machine API. o Created new struct regulator_init_data to contain regulator machine configuration constraints and consmuers. o Changed set_supply(), set_machine_constraints(), set_consumer_device_supply() to remove their string identifier parameters. Also made them static and moved functions nearer top of core.c. o Removed no longer used inline func to_rdev() o Added regulator_get_init_drvdata() to retrieve init data. o Added struct device* as parameter to regulator_register(). o Changed my email address. Signed-off-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2008-10-10 12:22:20 +00:00
struct regulator_dev *rdev = dev_get_drvdata(dev);
return regulator_print_opmode(buf,
rdev->constraints->state_mem.mode);
}
static DEVICE_ATTR(suspend_mem_mode, 0444,
regulator_suspend_mem_mode_show, NULL);
static ssize_t regulator_suspend_disk_mode_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
regulator: core - Rework machine API to remove string based functions. This improves the machine level API in order to configure regulator constraints and consumers as platform data and removes the old string based API that required several calls to set up each regulator. The intention is to create a struct regulator_init_data, populate it's fields with constraints, consumers devices, etc and then register the regulator device from board.c in the standard Linux way. e.g. regulator LDO2 (supplying codec and sim) platform data. /* regulator LDO2 consumer devices */ static struct regulator_consumer_supply ldo2_consumers[] = { { .dev = &platform_audio_device.dev, .supply = "codec_avdd", }, { .dev = &platform_sim_device.dev, .supply = "sim_vcc", } }; /* regulator LDO2 constraints */ static struct regulator_init_data ldo2_data = { .constraints = { .min_uV = 3300000, .max_uV = 3300000, .valid_modes_mask = REGULATOR_MODE_NORMAL, .apply_uV = 1, }, .num_consumer_supplies = ARRAY_SIZE(ldo2_consumers), .consumer_supplies = ldo2_consumers, }; /* machine regulator devices with thier consumers and constraints */ static struct platform_device wm8350_regulator_devices[] = { { .name = "wm8350-regulator", .id = WM8350_LDO_2, .dev = { .platform_data = &ldo2_data, }, }, }; Changes in detail:- o Removed all const char* regulator config functions in machine API. o Created new struct regulator_init_data to contain regulator machine configuration constraints and consmuers. o Changed set_supply(), set_machine_constraints(), set_consumer_device_supply() to remove their string identifier parameters. Also made them static and moved functions nearer top of core.c. o Removed no longer used inline func to_rdev() o Added regulator_get_init_drvdata() to retrieve init data. o Added struct device* as parameter to regulator_register(). o Changed my email address. Signed-off-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2008-10-10 12:22:20 +00:00
struct regulator_dev *rdev = dev_get_drvdata(dev);
return regulator_print_opmode(buf,
rdev->constraints->state_disk.mode);
}
static DEVICE_ATTR(suspend_disk_mode, 0444,
regulator_suspend_disk_mode_show, NULL);
static ssize_t regulator_suspend_standby_mode_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
regulator: core - Rework machine API to remove string based functions. This improves the machine level API in order to configure regulator constraints and consumers as platform data and removes the old string based API that required several calls to set up each regulator. The intention is to create a struct regulator_init_data, populate it's fields with constraints, consumers devices, etc and then register the regulator device from board.c in the standard Linux way. e.g. regulator LDO2 (supplying codec and sim) platform data. /* regulator LDO2 consumer devices */ static struct regulator_consumer_supply ldo2_consumers[] = { { .dev = &platform_audio_device.dev, .supply = "codec_avdd", }, { .dev = &platform_sim_device.dev, .supply = "sim_vcc", } }; /* regulator LDO2 constraints */ static struct regulator_init_data ldo2_data = { .constraints = { .min_uV = 3300000, .max_uV = 3300000, .valid_modes_mask = REGULATOR_MODE_NORMAL, .apply_uV = 1, }, .num_consumer_supplies = ARRAY_SIZE(ldo2_consumers), .consumer_supplies = ldo2_consumers, }; /* machine regulator devices with thier consumers and constraints */ static struct platform_device wm8350_regulator_devices[] = { { .name = "wm8350-regulator", .id = WM8350_LDO_2, .dev = { .platform_data = &ldo2_data, }, }, }; Changes in detail:- o Removed all const char* regulator config functions in machine API. o Created new struct regulator_init_data to contain regulator machine configuration constraints and consmuers. o Changed set_supply(), set_machine_constraints(), set_consumer_device_supply() to remove their string identifier parameters. Also made them static and moved functions nearer top of core.c. o Removed no longer used inline func to_rdev() o Added regulator_get_init_drvdata() to retrieve init data. o Added struct device* as parameter to regulator_register(). o Changed my email address. Signed-off-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2008-10-10 12:22:20 +00:00
struct regulator_dev *rdev = dev_get_drvdata(dev);
return regulator_print_opmode(buf,
rdev->constraints->state_standby.mode);
}
static DEVICE_ATTR(suspend_standby_mode, 0444,
regulator_suspend_standby_mode_show, NULL);
static ssize_t regulator_suspend_mem_state_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
regulator: core - Rework machine API to remove string based functions. This improves the machine level API in order to configure regulator constraints and consumers as platform data and removes the old string based API that required several calls to set up each regulator. The intention is to create a struct regulator_init_data, populate it's fields with constraints, consumers devices, etc and then register the regulator device from board.c in the standard Linux way. e.g. regulator LDO2 (supplying codec and sim) platform data. /* regulator LDO2 consumer devices */ static struct regulator_consumer_supply ldo2_consumers[] = { { .dev = &platform_audio_device.dev, .supply = "codec_avdd", }, { .dev = &platform_sim_device.dev, .supply = "sim_vcc", } }; /* regulator LDO2 constraints */ static struct regulator_init_data ldo2_data = { .constraints = { .min_uV = 3300000, .max_uV = 3300000, .valid_modes_mask = REGULATOR_MODE_NORMAL, .apply_uV = 1, }, .num_consumer_supplies = ARRAY_SIZE(ldo2_consumers), .consumer_supplies = ldo2_consumers, }; /* machine regulator devices with thier consumers and constraints */ static struct platform_device wm8350_regulator_devices[] = { { .name = "wm8350-regulator", .id = WM8350_LDO_2, .dev = { .platform_data = &ldo2_data, }, }, }; Changes in detail:- o Removed all const char* regulator config functions in machine API. o Created new struct regulator_init_data to contain regulator machine configuration constraints and consmuers. o Changed set_supply(), set_machine_constraints(), set_consumer_device_supply() to remove their string identifier parameters. Also made them static and moved functions nearer top of core.c. o Removed no longer used inline func to_rdev() o Added regulator_get_init_drvdata() to retrieve init data. o Added struct device* as parameter to regulator_register(). o Changed my email address. Signed-off-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2008-10-10 12:22:20 +00:00
struct regulator_dev *rdev = dev_get_drvdata(dev);
return regulator_print_state(buf,
rdev->constraints->state_mem.enabled);
}
static DEVICE_ATTR(suspend_mem_state, 0444,
regulator_suspend_mem_state_show, NULL);
static ssize_t regulator_suspend_disk_state_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
regulator: core - Rework machine API to remove string based functions. This improves the machine level API in order to configure regulator constraints and consumers as platform data and removes the old string based API that required several calls to set up each regulator. The intention is to create a struct regulator_init_data, populate it's fields with constraints, consumers devices, etc and then register the regulator device from board.c in the standard Linux way. e.g. regulator LDO2 (supplying codec and sim) platform data. /* regulator LDO2 consumer devices */ static struct regulator_consumer_supply ldo2_consumers[] = { { .dev = &platform_audio_device.dev, .supply = "codec_avdd", }, { .dev = &platform_sim_device.dev, .supply = "sim_vcc", } }; /* regulator LDO2 constraints */ static struct regulator_init_data ldo2_data = { .constraints = { .min_uV = 3300000, .max_uV = 3300000, .valid_modes_mask = REGULATOR_MODE_NORMAL, .apply_uV = 1, }, .num_consumer_supplies = ARRAY_SIZE(ldo2_consumers), .consumer_supplies = ldo2_consumers, }; /* machine regulator devices with thier consumers and constraints */ static struct platform_device wm8350_regulator_devices[] = { { .name = "wm8350-regulator", .id = WM8350_LDO_2, .dev = { .platform_data = &ldo2_data, }, }, }; Changes in detail:- o Removed all const char* regulator config functions in machine API. o Created new struct regulator_init_data to contain regulator machine configuration constraints and consmuers. o Changed set_supply(), set_machine_constraints(), set_consumer_device_supply() to remove their string identifier parameters. Also made them static and moved functions nearer top of core.c. o Removed no longer used inline func to_rdev() o Added regulator_get_init_drvdata() to retrieve init data. o Added struct device* as parameter to regulator_register(). o Changed my email address. Signed-off-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2008-10-10 12:22:20 +00:00
struct regulator_dev *rdev = dev_get_drvdata(dev);
return regulator_print_state(buf,
rdev->constraints->state_disk.enabled);
}
static DEVICE_ATTR(suspend_disk_state, 0444,
regulator_suspend_disk_state_show, NULL);
static ssize_t regulator_suspend_standby_state_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
regulator: core - Rework machine API to remove string based functions. This improves the machine level API in order to configure regulator constraints and consumers as platform data and removes the old string based API that required several calls to set up each regulator. The intention is to create a struct regulator_init_data, populate it's fields with constraints, consumers devices, etc and then register the regulator device from board.c in the standard Linux way. e.g. regulator LDO2 (supplying codec and sim) platform data. /* regulator LDO2 consumer devices */ static struct regulator_consumer_supply ldo2_consumers[] = { { .dev = &platform_audio_device.dev, .supply = "codec_avdd", }, { .dev = &platform_sim_device.dev, .supply = "sim_vcc", } }; /* regulator LDO2 constraints */ static struct regulator_init_data ldo2_data = { .constraints = { .min_uV = 3300000, .max_uV = 3300000, .valid_modes_mask = REGULATOR_MODE_NORMAL, .apply_uV = 1, }, .num_consumer_supplies = ARRAY_SIZE(ldo2_consumers), .consumer_supplies = ldo2_consumers, }; /* machine regulator devices with thier consumers and constraints */ static struct platform_device wm8350_regulator_devices[] = { { .name = "wm8350-regulator", .id = WM8350_LDO_2, .dev = { .platform_data = &ldo2_data, }, }, }; Changes in detail:- o Removed all const char* regulator config functions in machine API. o Created new struct regulator_init_data to contain regulator machine configuration constraints and consmuers. o Changed set_supply(), set_machine_constraints(), set_consumer_device_supply() to remove their string identifier parameters. Also made them static and moved functions nearer top of core.c. o Removed no longer used inline func to_rdev() o Added regulator_get_init_drvdata() to retrieve init data. o Added struct device* as parameter to regulator_register(). o Changed my email address. Signed-off-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2008-10-10 12:22:20 +00:00
struct regulator_dev *rdev = dev_get_drvdata(dev);
return regulator_print_state(buf,
rdev->constraints->state_standby.enabled);
}
static DEVICE_ATTR(suspend_standby_state, 0444,
regulator_suspend_standby_state_show, NULL);
static ssize_t regulator_bypass_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct regulator_dev *rdev = dev_get_drvdata(dev);
const char *report;
bool bypass;
int ret;
ret = rdev->desc->ops->get_bypass(rdev, &bypass);
if (ret != 0)
report = "unknown";
else if (bypass)
report = "enabled";
else
report = "disabled";
return sprintf(buf, "%s\n", report);
}
static DEVICE_ATTR(bypass, 0444,
regulator_bypass_show, NULL);
/* Calculate the new optimum regulator operating mode based on the new total
* consumer load. All locks held by caller */
static int drms_uA_update(struct regulator_dev *rdev)
{
struct regulator *sibling;
int current_uA = 0, output_uV, input_uV, err;
unsigned int mode;
lockdep_assert_held_once(&rdev->mutex);
/*
* first check to see if we can set modes at all, otherwise just
* tell the consumer everything is OK.
*/
if (!regulator_ops_is_valid(rdev, REGULATOR_CHANGE_DRMS))
return 0;
if (!rdev->desc->ops->get_optimum_mode &&
!rdev->desc->ops->set_load)
return 0;
if (!rdev->desc->ops->set_mode &&
!rdev->desc->ops->set_load)
return -EINVAL;
/* calc total requested load */
list_for_each_entry(sibling, &rdev->consumer_list, list)
current_uA += sibling->uA_load;
current_uA += rdev->constraints->system_load;
if (rdev->desc->ops->set_load) {
/* set the optimum mode for our new total regulator load */
err = rdev->desc->ops->set_load(rdev, current_uA);
if (err < 0)
rdev_err(rdev, "failed to set load %d\n", current_uA);
} else {
/* get output voltage */
output_uV = _regulator_get_voltage(rdev);
if (output_uV <= 0) {
rdev_err(rdev, "invalid output voltage found\n");
return -EINVAL;
}
/* get input voltage */
input_uV = 0;
if (rdev->supply)
input_uV = regulator_get_voltage(rdev->supply);
if (input_uV <= 0)
input_uV = rdev->constraints->input_uV;
if (input_uV <= 0) {
rdev_err(rdev, "invalid input voltage found\n");
return -EINVAL;
}
/* now get the optimum mode for our new total regulator load */
mode = rdev->desc->ops->get_optimum_mode(rdev, input_uV,
output_uV, current_uA);
/* check the new mode is allowed */
err = regulator_mode_constrain(rdev, &mode);
if (err < 0) {
rdev_err(rdev, "failed to get optimum mode @ %d uA %d -> %d uV\n",
current_uA, input_uV, output_uV);
return err;
}
err = rdev->desc->ops->set_mode(rdev, mode);
if (err < 0)
rdev_err(rdev, "failed to set optimum mode %x\n", mode);
}
return err;
}
static int suspend_set_state(struct regulator_dev *rdev,
struct regulator_state *rstate)
{
int ret = 0;
/* If we have no suspend mode configration don't set anything;
* only warn if the driver implements set_suspend_voltage or
* set_suspend_mode callback.
*/
if (!rstate->enabled && !rstate->disabled) {
if (rdev->desc->ops->set_suspend_voltage ||
rdev->desc->ops->set_suspend_mode)
rdev_warn(rdev, "No configuration\n");
return 0;
}
if (rstate->enabled && rstate->disabled) {
rdev_err(rdev, "invalid configuration\n");
return -EINVAL;
}
if (rstate->enabled && rdev->desc->ops->set_suspend_enable)
ret = rdev->desc->ops->set_suspend_enable(rdev);
else if (rstate->disabled && rdev->desc->ops->set_suspend_disable)
ret = rdev->desc->ops->set_suspend_disable(rdev);
else /* OK if set_suspend_enable or set_suspend_disable is NULL */
ret = 0;
if (ret < 0) {
rdev_err(rdev, "failed to enabled/disable\n");
return ret;
}
if (rdev->desc->ops->set_suspend_voltage && rstate->uV > 0) {
ret = rdev->desc->ops->set_suspend_voltage(rdev, rstate->uV);
if (ret < 0) {
rdev_err(rdev, "failed to set voltage\n");
return ret;
}
}
if (rdev->desc->ops->set_suspend_mode && rstate->mode > 0) {
ret = rdev->desc->ops->set_suspend_mode(rdev, rstate->mode);
if (ret < 0) {
rdev_err(rdev, "failed to set mode\n");
return ret;
}
}
return ret;
}
/* locks held by caller */
static int suspend_prepare(struct regulator_dev *rdev, suspend_state_t state)
{
if (!rdev->constraints)
return -EINVAL;
switch (state) {
case PM_SUSPEND_STANDBY:
return suspend_set_state(rdev,
&rdev->constraints->state_standby);
case PM_SUSPEND_MEM:
return suspend_set_state(rdev,
&rdev->constraints->state_mem);
case PM_SUSPEND_MAX:
return suspend_set_state(rdev,
&rdev->constraints->state_disk);
default:
return -EINVAL;
}
}
static void print_constraints(struct regulator_dev *rdev)
{
struct regulation_constraints *constraints = rdev->constraints;
char buf[160] = "";
size_t len = sizeof(buf) - 1;
int count = 0;
int ret;
if (constraints->min_uV && constraints->max_uV) {
if (constraints->min_uV == constraints->max_uV)
count += scnprintf(buf + count, len - count, "%d mV ",
constraints->min_uV / 1000);
else
count += scnprintf(buf + count, len - count,
"%d <--> %d mV ",
constraints->min_uV / 1000,
constraints->max_uV / 1000);
}
if (!constraints->min_uV ||
constraints->min_uV != constraints->max_uV) {
ret = _regulator_get_voltage(rdev);
if (ret > 0)
count += scnprintf(buf + count, len - count,
"at %d mV ", ret / 1000);
}
if (constraints->uV_offset)
count += scnprintf(buf + count, len - count, "%dmV offset ",
constraints->uV_offset / 1000);
if (constraints->min_uA && constraints->max_uA) {
if (constraints->min_uA == constraints->max_uA)
count += scnprintf(buf + count, len - count, "%d mA ",
constraints->min_uA / 1000);
else
count += scnprintf(buf + count, len - count,
"%d <--> %d mA ",
constraints->min_uA / 1000,
constraints->max_uA / 1000);
}
if (!constraints->min_uA ||
constraints->min_uA != constraints->max_uA) {
ret = _regulator_get_current_limit(rdev);
if (ret > 0)
count += scnprintf(buf + count, len - count,
"at %d mA ", ret / 1000);
}
if (constraints->valid_modes_mask & REGULATOR_MODE_FAST)
count += scnprintf(buf + count, len - count, "fast ");
if (constraints->valid_modes_mask & REGULATOR_MODE_NORMAL)
count += scnprintf(buf + count, len - count, "normal ");
if (constraints->valid_modes_mask & REGULATOR_MODE_IDLE)
count += scnprintf(buf + count, len - count, "idle ");
if (constraints->valid_modes_mask & REGULATOR_MODE_STANDBY)
count += scnprintf(buf + count, len - count, "standby");
if (!count)
scnprintf(buf, len, "no parameters");
rdev_dbg(rdev, "%s\n", buf);
if ((constraints->min_uV != constraints->max_uV) &&
!regulator_ops_is_valid(rdev, REGULATOR_CHANGE_VOLTAGE))
rdev_warn(rdev,
"Voltage range but no REGULATOR_CHANGE_VOLTAGE\n");
}
static int machine_constraints_voltage(struct regulator_dev *rdev,
struct regulation_constraints *constraints)
regulator: core - Rework machine API to remove string based functions. This improves the machine level API in order to configure regulator constraints and consumers as platform data and removes the old string based API that required several calls to set up each regulator. The intention is to create a struct regulator_init_data, populate it's fields with constraints, consumers devices, etc and then register the regulator device from board.c in the standard Linux way. e.g. regulator LDO2 (supplying codec and sim) platform data. /* regulator LDO2 consumer devices */ static struct regulator_consumer_supply ldo2_consumers[] = { { .dev = &platform_audio_device.dev, .supply = "codec_avdd", }, { .dev = &platform_sim_device.dev, .supply = "sim_vcc", } }; /* regulator LDO2 constraints */ static struct regulator_init_data ldo2_data = { .constraints = { .min_uV = 3300000, .max_uV = 3300000, .valid_modes_mask = REGULATOR_MODE_NORMAL, .apply_uV = 1, }, .num_consumer_supplies = ARRAY_SIZE(ldo2_consumers), .consumer_supplies = ldo2_consumers, }; /* machine regulator devices with thier consumers and constraints */ static struct platform_device wm8350_regulator_devices[] = { { .name = "wm8350-regulator", .id = WM8350_LDO_2, .dev = { .platform_data = &ldo2_data, }, }, }; Changes in detail:- o Removed all const char* regulator config functions in machine API. o Created new struct regulator_init_data to contain regulator machine configuration constraints and consmuers. o Changed set_supply(), set_machine_constraints(), set_consumer_device_supply() to remove their string identifier parameters. Also made them static and moved functions nearer top of core.c. o Removed no longer used inline func to_rdev() o Added regulator_get_init_drvdata() to retrieve init data. o Added struct device* as parameter to regulator_register(). o Changed my email address. Signed-off-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2008-10-10 12:22:20 +00:00
{
const struct regulator_ops *ops = rdev->desc->ops;
int ret;
/* do we need to apply the constraint voltage */
if (rdev->constraints->apply_uV &&
rdev->constraints->min_uV && rdev->constraints->max_uV) {
int target_min, target_max;
int current_uV = _regulator_get_voltage(rdev);
if (current_uV < 0) {
rdev_err(rdev,
"failed to get the current voltage(%d)\n",
current_uV);
return current_uV;
}
/*
* If we're below the minimum voltage move up to the
* minimum voltage, if we're above the maximum voltage
* then move down to the maximum.
*/
target_min = current_uV;
target_max = current_uV;
if (current_uV < rdev->constraints->min_uV) {
target_min = rdev->constraints->min_uV;
target_max = rdev->constraints->min_uV;
}
if (current_uV > rdev->constraints->max_uV) {
target_min = rdev->constraints->max_uV;
target_max = rdev->constraints->max_uV;
}
if (target_min != current_uV || target_max != current_uV) {
rdev_info(rdev, "Bringing %duV into %d-%duV\n",
current_uV, target_min, target_max);
ret = _regulator_do_set_voltage(
rdev, target_min, target_max);
if (ret < 0) {
rdev_err(rdev,
"failed to apply %d-%duV constraint(%d)\n",
target_min, target_max, ret);
return ret;
}
}
}
/* constrain machine-level voltage specs to fit
* the actual range supported by this regulator.
*/
if (ops->list_voltage && rdev->desc->n_voltages) {
int count = rdev->desc->n_voltages;
int i;
int min_uV = INT_MAX;
int max_uV = INT_MIN;
int cmin = constraints->min_uV;
int cmax = constraints->max_uV;
/* it's safe to autoconfigure fixed-voltage supplies
and the constraints are used by list_voltage. */
if (count == 1 && !cmin) {
cmin = 1;
cmax = INT_MAX;
constraints->min_uV = cmin;
constraints->max_uV = cmax;
}
/* voltage constraints are optional */
if ((cmin == 0) && (cmax == 0))
return 0;
/* else require explicit machine-level constraints */
if (cmin <= 0 || cmax <= 0 || cmax < cmin) {
rdev_err(rdev, "invalid voltage constraints\n");
return -EINVAL;
}
/* initial: [cmin..cmax] valid, [min_uV..max_uV] not */
for (i = 0; i < count; i++) {
int value;
value = ops->list_voltage(rdev, i);
if (value <= 0)
continue;
/* maybe adjust [min_uV..max_uV] */
if (value >= cmin && value < min_uV)
min_uV = value;
if (value <= cmax && value > max_uV)
max_uV = value;
}
/* final: [min_uV..max_uV] valid iff constraints valid */
if (max_uV < min_uV) {
rdev_err(rdev,
"unsupportable voltage constraints %u-%uuV\n",
min_uV, max_uV);
return -EINVAL;
}
/* use regulator's subset of machine constraints */
if (constraints->min_uV < min_uV) {
rdev_dbg(rdev, "override min_uV, %d -> %d\n",
constraints->min_uV, min_uV);
constraints->min_uV = min_uV;
}
if (constraints->max_uV > max_uV) {
rdev_dbg(rdev, "override max_uV, %d -> %d\n",
constraints->max_uV, max_uV);
constraints->max_uV = max_uV;
}
}
return 0;
}
static int machine_constraints_current(struct regulator_dev *rdev,
struct regulation_constraints *constraints)
{
const struct regulator_ops *ops = rdev->desc->ops;
int ret;
if (!constraints->min_uA && !constraints->max_uA)
return 0;
if (constraints->min_uA > constraints->max_uA) {
rdev_err(rdev, "Invalid current constraints\n");
return -EINVAL;
}
if (!ops->set_current_limit || !ops->get_current_limit) {
rdev_warn(rdev, "Operation of current configuration missing\n");
return 0;
}
/* Set regulator current in constraints range */
ret = ops->set_current_limit(rdev, constraints->min_uA,
constraints->max_uA);
if (ret < 0) {
rdev_err(rdev, "Failed to set current constraint, %d\n", ret);
return ret;
}
return 0;
}
static int _regulator_do_enable(struct regulator_dev *rdev);
/**
* set_machine_constraints - sets regulator constraints
* @rdev: regulator source
* @constraints: constraints to apply
*
* Allows platform initialisation code to define and constrain
* regulator circuits e.g. valid voltage/current ranges, etc. NOTE:
* Constraints *must* be set by platform code in order for some
* regulator operations to proceed i.e. set_voltage, set_current_limit,
* set_mode.
*/
static int set_machine_constraints(struct regulator_dev *rdev,
const struct regulation_constraints *constraints)
{
int ret = 0;
const struct regulator_ops *ops = rdev->desc->ops;
if (constraints)
rdev->constraints = kmemdup(constraints, sizeof(*constraints),
GFP_KERNEL);
else
rdev->constraints = kzalloc(sizeof(*constraints),
GFP_KERNEL);
if (!rdev->constraints)
return -ENOMEM;
ret = machine_constraints_voltage(rdev, rdev->constraints);
if (ret != 0)
return ret;
ret = machine_constraints_current(rdev, rdev->constraints);
if (ret != 0)
return ret;
if (rdev->constraints->ilim_uA && ops->set_input_current_limit) {
ret = ops->set_input_current_limit(rdev,
rdev->constraints->ilim_uA);
if (ret < 0) {
rdev_err(rdev, "failed to set input limit\n");
return ret;
}
}
regulator: core - Rework machine API to remove string based functions. This improves the machine level API in order to configure regulator constraints and consumers as platform data and removes the old string based API that required several calls to set up each regulator. The intention is to create a struct regulator_init_data, populate it's fields with constraints, consumers devices, etc and then register the regulator device from board.c in the standard Linux way. e.g. regulator LDO2 (supplying codec and sim) platform data. /* regulator LDO2 consumer devices */ static struct regulator_consumer_supply ldo2_consumers[] = { { .dev = &platform_audio_device.dev, .supply = "codec_avdd", }, { .dev = &platform_sim_device.dev, .supply = "sim_vcc", } }; /* regulator LDO2 constraints */ static struct regulator_init_data ldo2_data = { .constraints = { .min_uV = 3300000, .max_uV = 3300000, .valid_modes_mask = REGULATOR_MODE_NORMAL, .apply_uV = 1, }, .num_consumer_supplies = ARRAY_SIZE(ldo2_consumers), .consumer_supplies = ldo2_consumers, }; /* machine regulator devices with thier consumers and constraints */ static struct platform_device wm8350_regulator_devices[] = { { .name = "wm8350-regulator", .id = WM8350_LDO_2, .dev = { .platform_data = &ldo2_data, }, }, }; Changes in detail:- o Removed all const char* regulator config functions in machine API. o Created new struct regulator_init_data to contain regulator machine configuration constraints and consmuers. o Changed set_supply(), set_machine_constraints(), set_consumer_device_supply() to remove their string identifier parameters. Also made them static and moved functions nearer top of core.c. o Removed no longer used inline func to_rdev() o Added regulator_get_init_drvdata() to retrieve init data. o Added struct device* as parameter to regulator_register(). o Changed my email address. Signed-off-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2008-10-10 12:22:20 +00:00
/* do we need to setup our suspend state */
if (rdev->constraints->initial_state) {
ret = suspend_prepare(rdev, rdev->constraints->initial_state);
if (ret < 0) {
rdev_err(rdev, "failed to set suspend state\n");
return ret;
}
}
regulator: core - Rework machine API to remove string based functions. This improves the machine level API in order to configure regulator constraints and consumers as platform data and removes the old string based API that required several calls to set up each regulator. The intention is to create a struct regulator_init_data, populate it's fields with constraints, consumers devices, etc and then register the regulator device from board.c in the standard Linux way. e.g. regulator LDO2 (supplying codec and sim) platform data. /* regulator LDO2 consumer devices */ static struct regulator_consumer_supply ldo2_consumers[] = { { .dev = &platform_audio_device.dev, .supply = "codec_avdd", }, { .dev = &platform_sim_device.dev, .supply = "sim_vcc", } }; /* regulator LDO2 constraints */ static struct regulator_init_data ldo2_data = { .constraints = { .min_uV = 3300000, .max_uV = 3300000, .valid_modes_mask = REGULATOR_MODE_NORMAL, .apply_uV = 1, }, .num_consumer_supplies = ARRAY_SIZE(ldo2_consumers), .consumer_supplies = ldo2_consumers, }; /* machine regulator devices with thier consumers and constraints */ static struct platform_device wm8350_regulator_devices[] = { { .name = "wm8350-regulator", .id = WM8350_LDO_2, .dev = { .platform_data = &ldo2_data, }, }, }; Changes in detail:- o Removed all const char* regulator config functions in machine API. o Created new struct regulator_init_data to contain regulator machine configuration constraints and consmuers. o Changed set_supply(), set_machine_constraints(), set_consumer_device_supply() to remove their string identifier parameters. Also made them static and moved functions nearer top of core.c. o Removed no longer used inline func to_rdev() o Added regulator_get_init_drvdata() to retrieve init data. o Added struct device* as parameter to regulator_register(). o Changed my email address. Signed-off-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2008-10-10 12:22:20 +00:00
if (rdev->constraints->initial_mode) {
if (!ops->set_mode) {
rdev_err(rdev, "no set_mode operation\n");
return -EINVAL;
}
ret = ops->set_mode(rdev, rdev->constraints->initial_mode);
if (ret < 0) {
rdev_err(rdev, "failed to set initial mode: %d\n", ret);
return ret;
}
}
/* If the constraints say the regulator should be on at this point
* and we have control then make sure it is enabled.
*/
if (rdev->constraints->always_on || rdev->constraints->boot_on) {
ret = _regulator_do_enable(rdev);
if (ret < 0 && ret != -EINVAL) {
rdev_err(rdev, "failed to enable\n");
return ret;
}
}
if ((rdev->constraints->ramp_delay || rdev->constraints->ramp_disable)
&& ops->set_ramp_delay) {
ret = ops->set_ramp_delay(rdev, rdev->constraints->ramp_delay);
if (ret < 0) {
rdev_err(rdev, "failed to set ramp_delay\n");
return ret;
}
}
if (rdev->constraints->pull_down && ops->set_pull_down) {
ret = ops->set_pull_down(rdev);
if (ret < 0) {
rdev_err(rdev, "failed to set pull down\n");
return ret;
}
}
if (rdev->constraints->soft_start && ops->set_soft_start) {
ret = ops->set_soft_start(rdev);
if (ret < 0) {
rdev_err(rdev, "failed to set soft start\n");
return ret;
}
}
if (rdev->constraints->over_current_protection
&& ops->set_over_current_protection) {
ret = ops->set_over_current_protection(rdev);
if (ret < 0) {
rdev_err(rdev, "failed to set over current protection\n");
return ret;
}
}
if (rdev->constraints->active_discharge && ops->set_active_discharge) {
bool ad_state = (rdev->constraints->active_discharge ==
REGULATOR_ACTIVE_DISCHARGE_ENABLE) ? true : false;
ret = ops->set_active_discharge(rdev, ad_state);
if (ret < 0) {
rdev_err(rdev, "failed to set active discharge\n");
return ret;
}
}
regulator: core - Rework machine API to remove string based functions. This improves the machine level API in order to configure regulator constraints and consumers as platform data and removes the old string based API that required several calls to set up each regulator. The intention is to create a struct regulator_init_data, populate it's fields with constraints, consumers devices, etc and then register the regulator device from board.c in the standard Linux way. e.g. regulator LDO2 (supplying codec and sim) platform data. /* regulator LDO2 consumer devices */ static struct regulator_consumer_supply ldo2_consumers[] = { { .dev = &platform_audio_device.dev, .supply = "codec_avdd", }, { .dev = &platform_sim_device.dev, .supply = "sim_vcc", } }; /* regulator LDO2 constraints */ static struct regulator_init_data ldo2_data = { .constraints = { .min_uV = 3300000, .max_uV = 3300000, .valid_modes_mask = REGULATOR_MODE_NORMAL, .apply_uV = 1, }, .num_consumer_supplies = ARRAY_SIZE(ldo2_consumers), .consumer_supplies = ldo2_consumers, }; /* machine regulator devices with thier consumers and constraints */ static struct platform_device wm8350_regulator_devices[] = { { .name = "wm8350-regulator", .id = WM8350_LDO_2, .dev = { .platform_data = &ldo2_data, }, }, }; Changes in detail:- o Removed all const char* regulator config functions in machine API. o Created new struct regulator_init_data to contain regulator machine configuration constraints and consmuers. o Changed set_supply(), set_machine_constraints(), set_consumer_device_supply() to remove their string identifier parameters. Also made them static and moved functions nearer top of core.c. o Removed no longer used inline func to_rdev() o Added regulator_get_init_drvdata() to retrieve init data. o Added struct device* as parameter to regulator_register(). o Changed my email address. Signed-off-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2008-10-10 12:22:20 +00:00
print_constraints(rdev);
return 0;
regulator: core - Rework machine API to remove string based functions. This improves the machine level API in order to configure regulator constraints and consumers as platform data and removes the old string based API that required several calls to set up each regulator. The intention is to create a struct regulator_init_data, populate it's fields with constraints, consumers devices, etc and then register the regulator device from board.c in the standard Linux way. e.g. regulator LDO2 (supplying codec and sim) platform data. /* regulator LDO2 consumer devices */ static struct regulator_consumer_supply ldo2_consumers[] = { { .dev = &platform_audio_device.dev, .supply = "codec_avdd", }, { .dev = &platform_sim_device.dev, .supply = "sim_vcc", } }; /* regulator LDO2 constraints */ static struct regulator_init_data ldo2_data = { .constraints = { .min_uV = 3300000, .max_uV = 3300000, .valid_modes_mask = REGULATOR_MODE_NORMAL, .apply_uV = 1, }, .num_consumer_supplies = ARRAY_SIZE(ldo2_consumers), .consumer_supplies = ldo2_consumers, }; /* machine regulator devices with thier consumers and constraints */ static struct platform_device wm8350_regulator_devices[] = { { .name = "wm8350-regulator", .id = WM8350_LDO_2, .dev = { .platform_data = &ldo2_data, }, }, }; Changes in detail:- o Removed all const char* regulator config functions in machine API. o Created new struct regulator_init_data to contain regulator machine configuration constraints and consmuers. o Changed set_supply(), set_machine_constraints(), set_consumer_device_supply() to remove their string identifier parameters. Also made them static and moved functions nearer top of core.c. o Removed no longer used inline func to_rdev() o Added regulator_get_init_drvdata() to retrieve init data. o Added struct device* as parameter to regulator_register(). o Changed my email address. Signed-off-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2008-10-10 12:22:20 +00:00
}
/**
* set_supply - set regulator supply regulator
* @rdev: regulator name
* @supply_rdev: supply regulator name
regulator: core - Rework machine API to remove string based functions. This improves the machine level API in order to configure regulator constraints and consumers as platform data and removes the old string based API that required several calls to set up each regulator. The intention is to create a struct regulator_init_data, populate it's fields with constraints, consumers devices, etc and then register the regulator device from board.c in the standard Linux way. e.g. regulator LDO2 (supplying codec and sim) platform data. /* regulator LDO2 consumer devices */ static struct regulator_consumer_supply ldo2_consumers[] = { { .dev = &platform_audio_device.dev, .supply = "codec_avdd", }, { .dev = &platform_sim_device.dev, .supply = "sim_vcc", } }; /* regulator LDO2 constraints */ static struct regulator_init_data ldo2_data = { .constraints = { .min_uV = 3300000, .max_uV = 3300000, .valid_modes_mask = REGULATOR_MODE_NORMAL, .apply_uV = 1, }, .num_consumer_supplies = ARRAY_SIZE(ldo2_consumers), .consumer_supplies = ldo2_consumers, }; /* machine regulator devices with thier consumers and constraints */ static struct platform_device wm8350_regulator_devices[] = { { .name = "wm8350-regulator", .id = WM8350_LDO_2, .dev = { .platform_data = &ldo2_data, }, }, }; Changes in detail:- o Removed all const char* regulator config functions in machine API. o Created new struct regulator_init_data to contain regulator machine configuration constraints and consmuers. o Changed set_supply(), set_machine_constraints(), set_consumer_device_supply() to remove their string identifier parameters. Also made them static and moved functions nearer top of core.c. o Removed no longer used inline func to_rdev() o Added regulator_get_init_drvdata() to retrieve init data. o Added struct device* as parameter to regulator_register(). o Changed my email address. Signed-off-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2008-10-10 12:22:20 +00:00
*
* Called by platform initialisation code to set the supply regulator for this
* regulator. This ensures that a regulators supply will also be enabled by the
* core if it's child is enabled.
*/
static int set_supply(struct regulator_dev *rdev,
struct regulator_dev *supply_rdev)
regulator: core - Rework machine API to remove string based functions. This improves the machine level API in order to configure regulator constraints and consumers as platform data and removes the old string based API that required several calls to set up each regulator. The intention is to create a struct regulator_init_data, populate it's fields with constraints, consumers devices, etc and then register the regulator device from board.c in the standard Linux way. e.g. regulator LDO2 (supplying codec and sim) platform data. /* regulator LDO2 consumer devices */ static struct regulator_consumer_supply ldo2_consumers[] = { { .dev = &platform_audio_device.dev, .supply = "codec_avdd", }, { .dev = &platform_sim_device.dev, .supply = "sim_vcc", } }; /* regulator LDO2 constraints */ static struct regulator_init_data ldo2_data = { .constraints = { .min_uV = 3300000, .max_uV = 3300000, .valid_modes_mask = REGULATOR_MODE_NORMAL, .apply_uV = 1, }, .num_consumer_supplies = ARRAY_SIZE(ldo2_consumers), .consumer_supplies = ldo2_consumers, }; /* machine regulator devices with thier consumers and constraints */ static struct platform_device wm8350_regulator_devices[] = { { .name = "wm8350-regulator", .id = WM8350_LDO_2, .dev = { .platform_data = &ldo2_data, }, }, }; Changes in detail:- o Removed all const char* regulator config functions in machine API. o Created new struct regulator_init_data to contain regulator machine configuration constraints and consmuers. o Changed set_supply(), set_machine_constraints(), set_consumer_device_supply() to remove their string identifier parameters. Also made them static and moved functions nearer top of core.c. o Removed no longer used inline func to_rdev() o Added regulator_get_init_drvdata() to retrieve init data. o Added struct device* as parameter to regulator_register(). o Changed my email address. Signed-off-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2008-10-10 12:22:20 +00:00
{
int err;
rdev_info(rdev, "supplied by %s\n", rdev_get_name(supply_rdev));
if (!try_module_get(supply_rdev->owner))
return -ENODEV;
rdev->supply = create_regulator(supply_rdev, &rdev->dev, "SUPPLY");
if (rdev->supply == NULL) {
err = -ENOMEM;
return err;
regulator: core - Rework machine API to remove string based functions. This improves the machine level API in order to configure regulator constraints and consumers as platform data and removes the old string based API that required several calls to set up each regulator. The intention is to create a struct regulator_init_data, populate it's fields with constraints, consumers devices, etc and then register the regulator device from board.c in the standard Linux way. e.g. regulator LDO2 (supplying codec and sim) platform data. /* regulator LDO2 consumer devices */ static struct regulator_consumer_supply ldo2_consumers[] = { { .dev = &platform_audio_device.dev, .supply = "codec_avdd", }, { .dev = &platform_sim_device.dev, .supply = "sim_vcc", } }; /* regulator LDO2 constraints */ static struct regulator_init_data ldo2_data = { .constraints = { .min_uV = 3300000, .max_uV = 3300000, .valid_modes_mask = REGULATOR_MODE_NORMAL, .apply_uV = 1, }, .num_consumer_supplies = ARRAY_SIZE(ldo2_consumers), .consumer_supplies = ldo2_consumers, }; /* machine regulator devices with thier consumers and constraints */ static struct platform_device wm8350_regulator_devices[] = { { .name = "wm8350-regulator", .id = WM8350_LDO_2, .dev = { .platform_data = &ldo2_data, }, }, }; Changes in detail:- o Removed all const char* regulator config functions in machine API. o Created new struct regulator_init_data to contain regulator machine configuration constraints and consmuers. o Changed set_supply(), set_machine_constraints(), set_consumer_device_supply() to remove their string identifier parameters. Also made them static and moved functions nearer top of core.c. o Removed no longer used inline func to_rdev() o Added regulator_get_init_drvdata() to retrieve init data. o Added struct device* as parameter to regulator_register(). o Changed my email address. Signed-off-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2008-10-10 12:22:20 +00:00
}
supply_rdev->open_count++;
return 0;
regulator: core - Rework machine API to remove string based functions. This improves the machine level API in order to configure regulator constraints and consumers as platform data and removes the old string based API that required several calls to set up each regulator. The intention is to create a struct regulator_init_data, populate it's fields with constraints, consumers devices, etc and then register the regulator device from board.c in the standard Linux way. e.g. regulator LDO2 (supplying codec and sim) platform data. /* regulator LDO2 consumer devices */ static struct regulator_consumer_supply ldo2_consumers[] = { { .dev = &platform_audio_device.dev, .supply = "codec_avdd", }, { .dev = &platform_sim_device.dev, .supply = "sim_vcc", } }; /* regulator LDO2 constraints */ static struct regulator_init_data ldo2_data = { .constraints = { .min_uV = 3300000, .max_uV = 3300000, .valid_modes_mask = REGULATOR_MODE_NORMAL, .apply_uV = 1, }, .num_consumer_supplies = ARRAY_SIZE(ldo2_consumers), .consumer_supplies = ldo2_consumers, }; /* machine regulator devices with thier consumers and constraints */ static struct platform_device wm8350_regulator_devices[] = { { .name = "wm8350-regulator", .id = WM8350_LDO_2, .dev = { .platform_data = &ldo2_data, }, }, }; Changes in detail:- o Removed all const char* regulator config functions in machine API. o Created new struct regulator_init_data to contain regulator machine configuration constraints and consmuers. o Changed set_supply(), set_machine_constraints(), set_consumer_device_supply() to remove their string identifier parameters. Also made them static and moved functions nearer top of core.c. o Removed no longer used inline func to_rdev() o Added regulator_get_init_drvdata() to retrieve init data. o Added struct device* as parameter to regulator_register(). o Changed my email address. Signed-off-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2008-10-10 12:22:20 +00:00
}
/**
* set_consumer_device_supply - Bind a regulator to a symbolic supply
* @rdev: regulator source
* @consumer_dev_name: dev_name() string for device supply applies to
* @supply: symbolic name for supply
regulator: core - Rework machine API to remove string based functions. This improves the machine level API in order to configure regulator constraints and consumers as platform data and removes the old string based API that required several calls to set up each regulator. The intention is to create a struct regulator_init_data, populate it's fields with constraints, consumers devices, etc and then register the regulator device from board.c in the standard Linux way. e.g. regulator LDO2 (supplying codec and sim) platform data. /* regulator LDO2 consumer devices */ static struct regulator_consumer_supply ldo2_consumers[] = { { .dev = &platform_audio_device.dev, .supply = "codec_avdd", }, { .dev = &platform_sim_device.dev, .supply = "sim_vcc", } }; /* regulator LDO2 constraints */ static struct regulator_init_data ldo2_data = { .constraints = { .min_uV = 3300000, .max_uV = 3300000, .valid_modes_mask = REGULATOR_MODE_NORMAL, .apply_uV = 1, }, .num_consumer_supplies = ARRAY_SIZE(ldo2_consumers), .consumer_supplies = ldo2_consumers, }; /* machine regulator devices with thier consumers and constraints */ static struct platform_device wm8350_regulator_devices[] = { { .name = "wm8350-regulator", .id = WM8350_LDO_2, .dev = { .platform_data = &ldo2_data, }, }, }; Changes in detail:- o Removed all const char* regulator config functions in machine API. o Created new struct regulator_init_data to contain regulator machine configuration constraints and consmuers. o Changed set_supply(), set_machine_constraints(), set_consumer_device_supply() to remove their string identifier parameters. Also made them static and moved functions nearer top of core.c. o Removed no longer used inline func to_rdev() o Added regulator_get_init_drvdata() to retrieve init data. o Added struct device* as parameter to regulator_register(). o Changed my email address. Signed-off-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2008-10-10 12:22:20 +00:00
*
* Allows platform initialisation code to map physical regulator
* sources to symbolic names for supplies for use by devices. Devices
* should use these symbolic names to request regulators, avoiding the
* need to provide board-specific regulator names as platform data.
*/
static int set_consumer_device_supply(struct regulator_dev *rdev,
const char *consumer_dev_name,
const char *supply)
regulator: core - Rework machine API to remove string based functions. This improves the machine level API in order to configure regulator constraints and consumers as platform data and removes the old string based API that required several calls to set up each regulator. The intention is to create a struct regulator_init_data, populate it's fields with constraints, consumers devices, etc and then register the regulator device from board.c in the standard Linux way. e.g. regulator LDO2 (supplying codec and sim) platform data. /* regulator LDO2 consumer devices */ static struct regulator_consumer_supply ldo2_consumers[] = { { .dev = &platform_audio_device.dev, .supply = "codec_avdd", }, { .dev = &platform_sim_device.dev, .supply = "sim_vcc", } }; /* regulator LDO2 constraints */ static struct regulator_init_data ldo2_data = { .constraints = { .min_uV = 3300000, .max_uV = 3300000, .valid_modes_mask = REGULATOR_MODE_NORMAL, .apply_uV = 1, }, .num_consumer_supplies = ARRAY_SIZE(ldo2_consumers), .consumer_supplies = ldo2_consumers, }; /* machine regulator devices with thier consumers and constraints */ static struct platform_device wm8350_regulator_devices[] = { { .name = "wm8350-regulator", .id = WM8350_LDO_2, .dev = { .platform_data = &ldo2_data, }, }, }; Changes in detail:- o Removed all const char* regulator config functions in machine API. o Created new struct regulator_init_data to contain regulator machine configuration constraints and consmuers. o Changed set_supply(), set_machine_constraints(), set_consumer_device_supply() to remove their string identifier parameters. Also made them static and moved functions nearer top of core.c. o Removed no longer used inline func to_rdev() o Added regulator_get_init_drvdata() to retrieve init data. o Added struct device* as parameter to regulator_register(). o Changed my email address. Signed-off-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2008-10-10 12:22:20 +00:00
{
struct regulator_map *node;
int has_dev;
regulator: core - Rework machine API to remove string based functions. This improves the machine level API in order to configure regulator constraints and consumers as platform data and removes the old string based API that required several calls to set up each regulator. The intention is to create a struct regulator_init_data, populate it's fields with constraints, consumers devices, etc and then register the regulator device from board.c in the standard Linux way. e.g. regulator LDO2 (supplying codec and sim) platform data. /* regulator LDO2 consumer devices */ static struct regulator_consumer_supply ldo2_consumers[] = { { .dev = &platform_audio_device.dev, .supply = "codec_avdd", }, { .dev = &platform_sim_device.dev, .supply = "sim_vcc", } }; /* regulator LDO2 constraints */ static struct regulator_init_data ldo2_data = { .constraints = { .min_uV = 3300000, .max_uV = 3300000, .valid_modes_mask = REGULATOR_MODE_NORMAL, .apply_uV = 1, }, .num_consumer_supplies = ARRAY_SIZE(ldo2_consumers), .consumer_supplies = ldo2_consumers, }; /* machine regulator devices with thier consumers and constraints */ static struct platform_device wm8350_regulator_devices[] = { { .name = "wm8350-regulator", .id = WM8350_LDO_2, .dev = { .platform_data = &ldo2_data, }, }, }; Changes in detail:- o Removed all const char* regulator config functions in machine API. o Created new struct regulator_init_data to contain regulator machine configuration constraints and consmuers. o Changed set_supply(), set_machine_constraints(), set_consumer_device_supply() to remove their string identifier parameters. Also made them static and moved functions nearer top of core.c. o Removed no longer used inline func to_rdev() o Added regulator_get_init_drvdata() to retrieve init data. o Added struct device* as parameter to regulator_register(). o Changed my email address. Signed-off-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2008-10-10 12:22:20 +00:00
if (supply == NULL)
return -EINVAL;
if (consumer_dev_name != NULL)
has_dev = 1;
else
has_dev = 0;
list_for_each_entry(node, &regulator_map_list, list) {
if (node->dev_name && consumer_dev_name) {
if (strcmp(node->dev_name, consumer_dev_name) != 0)
continue;
} else if (node->dev_name || consumer_dev_name) {
continue;
}
if (strcmp(node->supply, supply) != 0)
continue;
pr_debug("%s: %s/%s is '%s' supply; fail %s/%s\n",
consumer_dev_name,
dev_name(&node->regulator->dev),
node->regulator->desc->name,
supply,
dev_name(&rdev->dev), rdev_get_name(rdev));
return -EBUSY;
}
node = kzalloc(sizeof(struct regulator_map), GFP_KERNEL);
regulator: core - Rework machine API to remove string based functions. This improves the machine level API in order to configure regulator constraints and consumers as platform data and removes the old string based API that required several calls to set up each regulator. The intention is to create a struct regulator_init_data, populate it's fields with constraints, consumers devices, etc and then register the regulator device from board.c in the standard Linux way. e.g. regulator LDO2 (supplying codec and sim) platform data. /* regulator LDO2 consumer devices */ static struct regulator_consumer_supply ldo2_consumers[] = { { .dev = &platform_audio_device.dev, .supply = "codec_avdd", }, { .dev = &platform_sim_device.dev, .supply = "sim_vcc", } }; /* regulator LDO2 constraints */ static struct regulator_init_data ldo2_data = { .constraints = { .min_uV = 3300000, .max_uV = 3300000, .valid_modes_mask = REGULATOR_MODE_NORMAL, .apply_uV = 1, }, .num_consumer_supplies = ARRAY_SIZE(ldo2_consumers), .consumer_supplies = ldo2_consumers, }; /* machine regulator devices with thier consumers and constraints */ static struct platform_device wm8350_regulator_devices[] = { { .name = "wm8350-regulator", .id = WM8350_LDO_2, .dev = { .platform_data = &ldo2_data, }, }, }; Changes in detail:- o Removed all const char* regulator config functions in machine API. o Created new struct regulator_init_data to contain regulator machine configuration constraints and consmuers. o Changed set_supply(), set_machine_constraints(), set_consumer_device_supply() to remove their string identifier parameters. Also made them static and moved functions nearer top of core.c. o Removed no longer used inline func to_rdev() o Added regulator_get_init_drvdata() to retrieve init data. o Added struct device* as parameter to regulator_register(). o Changed my email address. Signed-off-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2008-10-10 12:22:20 +00:00
if (node == NULL)
return -ENOMEM;
node->regulator = rdev;
node->supply = supply;
if (has_dev) {
node->dev_name = kstrdup(consumer_dev_name, GFP_KERNEL);
if (node->dev_name == NULL) {
kfree(node);
return -ENOMEM;
}
}
regulator: core - Rework machine API to remove string based functions. This improves the machine level API in order to configure regulator constraints and consumers as platform data and removes the old string based API that required several calls to set up each regulator. The intention is to create a struct regulator_init_data, populate it's fields with constraints, consumers devices, etc and then register the regulator device from board.c in the standard Linux way. e.g. regulator LDO2 (supplying codec and sim) platform data. /* regulator LDO2 consumer devices */ static struct regulator_consumer_supply ldo2_consumers[] = { { .dev = &platform_audio_device.dev, .supply = "codec_avdd", }, { .dev = &platform_sim_device.dev, .supply = "sim_vcc", } }; /* regulator LDO2 constraints */ static struct regulator_init_data ldo2_data = { .constraints = { .min_uV = 3300000, .max_uV = 3300000, .valid_modes_mask = REGULATOR_MODE_NORMAL, .apply_uV = 1, }, .num_consumer_supplies = ARRAY_SIZE(ldo2_consumers), .consumer_supplies = ldo2_consumers, }; /* machine regulator devices with thier consumers and constraints */ static struct platform_device wm8350_regulator_devices[] = { { .name = "wm8350-regulator", .id = WM8350_LDO_2, .dev = { .platform_data = &ldo2_data, }, }, }; Changes in detail:- o Removed all const char* regulator config functions in machine API. o Created new struct regulator_init_data to contain regulator machine configuration constraints and consmuers. o Changed set_supply(), set_machine_constraints(), set_consumer_device_supply() to remove their string identifier parameters. Also made them static and moved functions nearer top of core.c. o Removed no longer used inline func to_rdev() o Added regulator_get_init_drvdata() to retrieve init data. o Added struct device* as parameter to regulator_register(). o Changed my email address. Signed-off-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2008-10-10 12:22:20 +00:00
list_add(&node->list, &regulator_map_list);
return 0;
}
static void unset_regulator_supplies(struct regulator_dev *rdev)
{
struct regulator_map *node, *n;
list_for_each_entry_safe(node, n, &regulator_map_list, list) {
if (rdev == node->regulator) {
list_del(&node->list);
kfree(node->dev_name);
kfree(node);
}
}
}
#ifdef CONFIG_DEBUG_FS
static ssize_t constraint_flags_read_file(struct file *file,
char __user *user_buf,
size_t count, loff_t *ppos)
{
const struct regulator *regulator = file->private_data;
const struct regulation_constraints *c = regulator->rdev->constraints;
char *buf;
ssize_t ret;
if (!c)
return 0;
buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
if (!buf)
return -ENOMEM;
ret = snprintf(buf, PAGE_SIZE,
"always_on: %u\n"
"boot_on: %u\n"
"apply_uV: %u\n"
"ramp_disable: %u\n"
"soft_start: %u\n"
"pull_down: %u\n"
"over_current_protection: %u\n",
c->always_on,
c->boot_on,
c->apply_uV,
c->ramp_disable,
c->soft_start,
c->pull_down,
c->over_current_protection);
ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
kfree(buf);
return ret;
}
#endif
static const struct file_operations constraint_flags_fops = {
#ifdef CONFIG_DEBUG_FS
.open = simple_open,
.read = constraint_flags_read_file,
.llseek = default_llseek,
#endif
};
#define REG_STR_SIZE 64
static struct regulator *create_regulator(struct regulator_dev *rdev,
struct device *dev,
const char *supply_name)
{
struct regulator *regulator;
char buf[REG_STR_SIZE];
int err, size;
regulator = kzalloc(sizeof(*regulator), GFP_KERNEL);
if (regulator == NULL)
return NULL;
mutex_lock(&rdev->mutex);
regulator->rdev = rdev;
list_add(&regulator->list, &rdev->consumer_list);
if (dev) {
regulator->dev = dev;
/* Add a link to the device sysfs entry */
size = scnprintf(buf, REG_STR_SIZE, "%s-%s",
dev->kobj.name, supply_name);
if (size >= REG_STR_SIZE)
goto overflow_err;
regulator->supply_name = kstrdup(buf, GFP_KERNEL);
if (regulator->supply_name == NULL)
goto overflow_err;
err = sysfs_create_link_nowarn(&rdev->dev.kobj, &dev->kobj,
buf);
if (err) {
rdev_dbg(rdev, "could not add device link %s err %d\n",
dev->kobj.name, err);
/* non-fatal */
}
} else {
regulator->supply_name = kstrdup(supply_name, GFP_KERNEL);
if (regulator->supply_name == NULL)
goto overflow_err;
}
regulator->debugfs = debugfs_create_dir(regulator->supply_name,
rdev->debugfs);
if (!regulator->debugfs) {
rdev_dbg(rdev, "Failed to create debugfs directory\n");
} else {
debugfs_create_u32("uA_load", 0444, regulator->debugfs,
&regulator->uA_load);
debugfs_create_u32("min_uV", 0444, regulator->debugfs,
&regulator->min_uV);
debugfs_create_u32("max_uV", 0444, regulator->debugfs,
&regulator->max_uV);
debugfs_create_file("constraint_flags", 0444,
regulator->debugfs, regulator,
&constraint_flags_fops);
}
/*
* Check now if the regulator is an always on regulator - if
* it is then we don't need to do nearly so much work for
* enable/disable calls.
*/
if (!regulator_ops_is_valid(rdev, REGULATOR_CHANGE_STATUS) &&
_regulator_is_enabled(rdev))
regulator->always_on = true;
mutex_unlock(&rdev->mutex);
return regulator;
overflow_err:
list_del(&regulator->list);
kfree(regulator);
mutex_unlock(&rdev->mutex);
return NULL;
}
static int _regulator_get_enable_time(struct regulator_dev *rdev)
{
if (rdev->constraints && rdev->constraints->enable_time)
return rdev->constraints->enable_time;
if (!rdev->desc->ops->enable_time)
return rdev->desc->enable_time;
return rdev->desc->ops->enable_time(rdev);
}
static struct regulator_supply_alias *regulator_find_supply_alias(
struct device *dev, const char *supply)
{
struct regulator_supply_alias *map;
list_for_each_entry(map, &regulator_supply_alias_list, list)
if (map->src_dev == dev && strcmp(map->src_supply, supply) == 0)
return map;
return NULL;
}
static void regulator_supply_alias(struct device **dev, const char **supply)
{
struct regulator_supply_alias *map;
map = regulator_find_supply_alias(*dev, *supply);
if (map) {
dev_dbg(*dev, "Mapping supply %s to %s,%s\n",
*supply, map->alias_supply,
dev_name(map->alias_dev));
*dev = map->alias_dev;
*supply = map->alias_supply;
}
}
static int of_node_match(struct device *dev, const void *data)
{
return dev->of_node == data;
}
static struct regulator_dev *of_find_regulator_by_node(struct device_node *np)
{
struct device *dev;
dev = class_find_device(&regulator_class, NULL, np, of_node_match);
return dev ? dev_to_rdev(dev) : NULL;
}
static int regulator_match(struct device *dev, const void *data)
{
struct regulator_dev *r = dev_to_rdev(dev);
return strcmp(rdev_get_name(r), data) == 0;
}
static struct regulator_dev *regulator_lookup_by_name(const char *name)
{
struct device *dev;
dev = class_find_device(&regulator_class, NULL, name, regulator_match);
return dev ? dev_to_rdev(dev) : NULL;
}
/**
* regulator_dev_lookup - lookup a regulator device.
* @dev: device for regulator "consumer".
* @supply: Supply name or regulator ID.
* @ret: 0 on success, -ENODEV if lookup fails permanently, -EPROBE_DEFER if
* lookup could succeed in the future.
*
* If successful, returns a struct regulator_dev that corresponds to the name
* @supply and with the embedded struct device refcount incremented by one,
* or NULL on failure. The refcount must be dropped by calling put_device().
*/
static struct regulator_dev *regulator_dev_lookup(struct device *dev,
const char *supply,
int *ret)
{
struct regulator_dev *r;
struct device_node *node;
struct regulator_map *map;
const char *devname = NULL;
regulator_supply_alias(&dev, &supply);
/* first do a dt based lookup */
if (dev && dev->of_node) {
node = of_get_regulator(dev, supply);
if (node) {
r = of_find_regulator_by_node(node);
if (r)
return r;
*ret = -EPROBE_DEFER;
return NULL;
} else {
/*
* If we couldn't even get the node then it's
* not just that the device didn't register
* yet, there's no node and we'll never
* succeed.
*/
*ret = -ENODEV;
}
}
/* if not found, try doing it non-dt way */
if (dev)
devname = dev_name(dev);
r = regulator_lookup_by_name(supply);
if (r)
return r;
mutex_lock(&regulator_list_mutex);
list_for_each_entry(map, &regulator_map_list, list) {
/* If the mapping has a device set up it must match */
if (map->dev_name &&
(!devname || strcmp(map->dev_name, devname)))
continue;
if (strcmp(map->supply, supply) == 0 &&
get_device(&map->regulator->dev)) {
mutex_unlock(&regulator_list_mutex);
return map->regulator;
}
}
mutex_unlock(&regulator_list_mutex);
return NULL;
}
static int regulator_resolve_supply(struct regulator_dev *rdev)
{
struct regulator_dev *r;
struct device *dev = rdev->dev.parent;
int ret;
/* No supply to resovle? */
if (!rdev->supply_name)
return 0;
/* Supply already resolved? */
if (rdev->supply)
return 0;
r = regulator_dev_lookup(dev, rdev->supply_name, &ret);
if (!r) {
if (ret == -ENODEV) {
/*
* No supply was specified for this regulator and
* there will never be one.
*/
return 0;
}
/* Did the lookup explicitly defer for us? */
if (ret == -EPROBE_DEFER)
return ret;
if (have_full_constraints()) {
r = dummy_regulator_rdev;
get_device(&r->dev);
} else {
dev_err(dev, "Failed to resolve %s-supply for %s\n",
rdev->supply_name, rdev->desc->name);
return -EPROBE_DEFER;
}
}
/* Recursively resolve the supply of the supply */
ret = regulator_resolve_supply(r);
if (ret < 0) {
put_device(&r->dev);
return ret;
}
ret = set_supply(rdev, r);
if (ret < 0) {
put_device(&r->dev);
return ret;
}
/* Cascade always-on state to supply */
if (_regulator_is_enabled(rdev)) {
ret = regulator_enable(rdev->supply);
if (ret < 0) {
_regulator_put(rdev->supply);
rdev->supply = NULL;
return ret;
}
}
return 0;
}
/* Internal regulator request function */
static struct regulator *_regulator_get(struct device *dev, const char *id,
bool exclusive, bool allow_dummy)
{
struct regulator_dev *rdev;
struct regulator *regulator = ERR_PTR(-EPROBE_DEFER);
const char *devname = NULL;
int ret;
if (id == NULL) {
pr_err("get() with no identifier\n");
return ERR_PTR(-EINVAL);
}
if (dev)
devname = dev_name(dev);
if (have_full_constraints())
ret = -ENODEV;
else
ret = -EPROBE_DEFER;
rdev = regulator_dev_lookup(dev, id, &ret);
if (rdev)
goto found;
regulator = ERR_PTR(ret);
/*
* If we have return value from dev_lookup fail, we do not expect to
* succeed, so, quit with appropriate error value
*/
if (ret && ret != -ENODEV)
return regulator;
if (!devname)
devname = "deviceless";
/*
* Assume that a regulator is physically present and enabled
* even if it isn't hooked up and just provide a dummy.
*/
if (have_full_constraints() && allow_dummy) {
pr_warn("%s supply %s not found, using dummy regulator\n",
devname, id);
rdev = dummy_regulator_rdev;
get_device(&rdev->dev);
goto found;
/* Don't log an error when called from regulator_get_optional() */
} else if (!have_full_constraints() || exclusive) {
dev_warn(dev, "dummy supplies not allowed\n");
}
return regulator;
found:
if (rdev->exclusive) {
regulator = ERR_PTR(-EPERM);
put_device(&rdev->dev);
return regulator;
}
if (exclusive && rdev->open_count) {
regulator = ERR_PTR(-EBUSY);
put_device(&rdev->dev);
return regulator;
}
ret = regulator_resolve_supply(rdev);
if (ret < 0) {
regulator = ERR_PTR(ret);
put_device(&rdev->dev);
return regulator;
}
if (!try_module_get(rdev->owner)) {
put_device(&rdev->dev);
return regulator;
}
regulator: core - Rework machine API to remove string based functions. This improves the machine level API in order to configure regulator constraints and consumers as platform data and removes the old string based API that required several calls to set up each regulator. The intention is to create a struct regulator_init_data, populate it's fields with constraints, consumers devices, etc and then register the regulator device from board.c in the standard Linux way. e.g. regulator LDO2 (supplying codec and sim) platform data. /* regulator LDO2 consumer devices */ static struct regulator_consumer_supply ldo2_consumers[] = { { .dev = &platform_audio_device.dev, .supply = "codec_avdd", }, { .dev = &platform_sim_device.dev, .supply = "sim_vcc", } }; /* regulator LDO2 constraints */ static struct regulator_init_data ldo2_data = { .constraints = { .min_uV = 3300000, .max_uV = 3300000, .valid_modes_mask = REGULATOR_MODE_NORMAL, .apply_uV = 1, }, .num_consumer_supplies = ARRAY_SIZE(ldo2_consumers), .consumer_supplies = ldo2_consumers, }; /* machine regulator devices with thier consumers and constraints */ static struct platform_device wm8350_regulator_devices[] = { { .name = "wm8350-regulator", .id = WM8350_LDO_2, .dev = { .platform_data = &ldo2_data, }, }, }; Changes in detail:- o Removed all const char* regulator config functions in machine API. o Created new struct regulator_init_data to contain regulator machine configuration constraints and consmuers. o Changed set_supply(), set_machine_constraints(), set_consumer_device_supply() to remove their string identifier parameters. Also made them static and moved functions nearer top of core.c. o Removed no longer used inline func to_rdev() o Added regulator_get_init_drvdata() to retrieve init data. o Added struct device* as parameter to regulator_register(). o Changed my email address. Signed-off-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2008-10-10 12:22:20 +00:00
regulator = create_regulator(rdev, dev, id);
if (regulator == NULL) {
regulator = ERR_PTR(-ENOMEM);
put_device(&rdev->dev);
module_put(rdev->owner);
return regulator;
}
rdev->open_count++;
if (exclusive) {
rdev->exclusive = 1;
ret = _regulator_is_enabled(rdev);
if (ret > 0)
rdev->use_count = 1;
else
rdev->use_count = 0;
}
return regulator;
}
/**
* regulator_get - lookup and obtain a reference to a regulator.
* @dev: device for regulator "consumer"
* @id: Supply name or regulator ID.
*
* Returns a struct regulator corresponding to the regulator producer,
* or IS_ERR() condition containing errno.
*
* Use of supply names configured via regulator_set_device_supply() is
* strongly encouraged. It is recommended that the supply name used
* should match the name used for the supply and/or the relevant
* device pins in the datasheet.
*/
struct regulator *regulator_get(struct device *dev, const char *id)
{
return _regulator_get(dev, id, false, true);
}
EXPORT_SYMBOL_GPL(regulator_get);
/**
* regulator_get_exclusive - obtain exclusive access to a regulator.
* @dev: device for regulator "consumer"
* @id: Supply name or regulator ID.
*
* Returns a struct regulator corresponding to the regulator producer,
* or IS_ERR() condition containing errno. Other consumers will be
* unable to obtain this regulator while this reference is held and the
* use count for the regulator will be initialised to reflect the current
* state of the regulator.
*
* This is intended for use by consumers which cannot tolerate shared
* use of the regulator such as those which need to force the
* regulator off for correct operation of the hardware they are
* controlling.
*
* Use of supply names configured via regulator_set_device_supply() is
* strongly encouraged. It is recommended that the supply name used
* should match the name used for the supply and/or the relevant
* device pins in the datasheet.
*/
struct regulator *regulator_get_exclusive(struct device *dev, const char *id)
{
return _regulator_get(dev, id, true, false);
}
EXPORT_SYMBOL_GPL(regulator_get_exclusive);
/**
* regulator_get_optional - obtain optional access to a regulator.
* @dev: device for regulator "consumer"
* @id: Supply name or regulator ID.
*
* Returns a struct regulator corresponding to the regulator producer,
* or IS_ERR() condition containing errno.
*
* This is intended for use by consumers for devices which can have
* some supplies unconnected in normal use, such as some MMC devices.
* It can allow the regulator core to provide stub supplies for other
* supplies requested using normal regulator_get() calls without
* disrupting the operation of drivers that can handle absent
* supplies.
*
* Use of supply names configured via regulator_set_device_supply() is
* strongly encouraged. It is recommended that the supply name used
* should match the name used for the supply and/or the relevant
* device pins in the datasheet.
*/
struct regulator *regulator_get_optional(struct device *dev, const char *id)
{
return _regulator_get(dev, id, false, false);
}
EXPORT_SYMBOL_GPL(regulator_get_optional);
/* regulator_list_mutex lock held by regulator_put() */
static void _regulator_put(struct regulator *regulator)
{
struct regulator_dev *rdev;
if (IS_ERR_OR_NULL(regulator))
return;
lockdep_assert_held_once(&regulator_list_mutex);
rdev = regulator->rdev;
debugfs_remove_recursive(regulator->debugfs);
/* remove any sysfs entries */
if (regulator->dev)
sysfs_remove_link(&rdev->dev.kobj, regulator->supply_name);
mutex_lock(&rdev->mutex);
list_del(&regulator->list);
rdev->open_count--;
rdev->exclusive = 0;
put_device(&rdev->dev);
mutex_unlock(&rdev->mutex);
kfree(regulator->supply_name);
kfree(regulator);
module_put(rdev->owner);
}
/**
* regulator_put - "free" the regulator source
* @regulator: regulator source
*
* Note: drivers must ensure that all regulator_enable calls made on this
* regulator source are balanced by regulator_disable calls prior to calling
* this function.
*/
void regulator_put(struct regulator *regulator)
{
mutex_lock(&regulator_list_mutex);
_regulator_put(regulator);
mutex_unlock(&regulator_list_mutex);
}
EXPORT_SYMBOL_GPL(regulator_put);
/**
* regulator_register_supply_alias - Provide device alias for supply lookup
*
* @dev: device that will be given as the regulator "consumer"
* @id: Supply name or regulator ID
* @alias_dev: device that should be used to lookup the supply
* @alias_id: Supply name or regulator ID that should be used to lookup the
* supply
*
* All lookups for id on dev will instead be conducted for alias_id on
* alias_dev.
*/
int regulator_register_supply_alias(struct device *dev, const char *id,
struct device *alias_dev,
const char *alias_id)
{
struct regulator_supply_alias *map;
map = regulator_find_supply_alias(dev, id);
if (map)
return -EEXIST;
map = kzalloc(sizeof(struct regulator_supply_alias), GFP_KERNEL);
if (!map)
return -ENOMEM;
map->src_dev = dev;
map->src_supply = id;
map->alias_dev = alias_dev;
map->alias_supply = alias_id;
list_add(&map->list, &regulator_supply_alias_list);
pr_info("Adding alias for supply %s,%s -> %s,%s\n",
id, dev_name(dev), alias_id, dev_name(alias_dev));
return 0;
}
EXPORT_SYMBOL_GPL(regulator_register_supply_alias);
/**
* regulator_unregister_supply_alias - Remove device alias
*
* @dev: device that will be given as the regulator "consumer"
* @id: Supply name or regulator ID
*
* Remove a lookup alias if one exists for id on dev.
*/
void regulator_unregister_supply_alias(struct device *dev, const char *id)
{
struct regulator_supply_alias *map;
map = regulator_find_supply_alias(dev, id);
if (map) {
list_del(&map->list);
kfree(map);
}
}
EXPORT_SYMBOL_GPL(regulator_unregister_supply_alias);
/**
* regulator_bulk_register_supply_alias - register multiple aliases
*
* @dev: device that will be given as the regulator "consumer"
* @id: List of supply names or regulator IDs
* @alias_dev: device that should be used to lookup the supply
* @alias_id: List of supply names or regulator IDs that should be used to
* lookup the supply
* @num_id: Number of aliases to register
*
* @return 0 on success, an errno on failure.
*
* This helper function allows drivers to register several supply
* aliases in one operation. If any of the aliases cannot be
* registered any aliases that were registered will be removed
* before returning to the caller.
*/
int regulator_bulk_register_supply_alias(struct device *dev,
const char *const *id,
struct device *alias_dev,
const char *const *alias_id,
int num_id)
{
int i;
int ret;
for (i = 0; i < num_id; ++i) {
ret = regulator_register_supply_alias(dev, id[i], alias_dev,
alias_id[i]);
if (ret < 0)
goto err;
}
return 0;
err:
dev_err(dev,
"Failed to create supply alias %s,%s -> %s,%s\n",
id[i], dev_name(dev), alias_id[i], dev_name(alias_dev));
while (--i >= 0)
regulator_unregister_supply_alias(dev, id[i]);
return ret;
}
EXPORT_SYMBOL_GPL(regulator_bulk_register_supply_alias);
/**
* regulator_bulk_unregister_supply_alias - unregister multiple aliases
*
* @dev: device that will be given as the regulator "consumer"
* @id: List of supply names or regulator IDs
* @num_id: Number of aliases to unregister
*
* This helper function allows drivers to unregister several supply
* aliases in one operation.
*/
void regulator_bulk_unregister_supply_alias(struct device *dev,
const char *const *id,
int num_id)
{
int i;
for (i = 0; i < num_id; ++i)
regulator_unregister_supply_alias(dev, id[i]);
}
EXPORT_SYMBOL_GPL(regulator_bulk_unregister_supply_alias);
2013-02-18 06:50:39 +00:00
/* Manage enable GPIO list. Same GPIO pin can be shared among regulators */
static int regulator_ena_gpio_request(struct regulator_dev *rdev,
const struct regulator_config *config)
{
struct regulator_enable_gpio *pin;
struct gpio_desc *gpiod;
2013-02-18 06:50:39 +00:00
int ret;
gpiod = gpio_to_desc(config->ena_gpio);
2013-02-18 06:50:39 +00:00
list_for_each_entry(pin, &regulator_ena_gpio_list, list) {
if (pin->gpiod == gpiod) {
2013-02-18 06:50:39 +00:00
rdev_dbg(rdev, "GPIO %d is already used\n",
config->ena_gpio);
goto update_ena_gpio_to_rdev;
}
}
ret = gpio_request_one(config->ena_gpio,
GPIOF_DIR_OUT | config->ena_gpio_flags,
rdev_get_name(rdev));
if (ret)
return ret;
pin = kzalloc(sizeof(struct regulator_enable_gpio), GFP_KERNEL);
if (pin == NULL) {
gpio_free(config->ena_gpio);
return -ENOMEM;
}
pin->gpiod = gpiod;
2013-02-18 06:50:39 +00:00
pin->ena_gpio_invert = config->ena_gpio_invert;
list_add(&pin->list, &regulator_ena_gpio_list);
update_ena_gpio_to_rdev:
pin->request_count++;
rdev->ena_pin = pin;
return 0;
}
static void regulator_ena_gpio_free(struct regulator_dev *rdev)
{
struct regulator_enable_gpio *pin, *n;
if (!rdev->ena_pin)
return;
/* Free the GPIO only in case of no use */
list_for_each_entry_safe(pin, n, &regulator_ena_gpio_list, list) {
if (pin->gpiod == rdev->ena_pin->gpiod) {
2013-02-18 06:50:39 +00:00
if (pin->request_count <= 1) {
pin->request_count = 0;
gpiod_put(pin->gpiod);
2013-02-18 06:50:39 +00:00
list_del(&pin->list);
kfree(pin);
rdev->ena_pin = NULL;
return;
2013-02-18 06:50:39 +00:00
} else {
pin->request_count--;
}
}
}
}
/**
* regulator_ena_gpio_ctrl - balance enable_count of each GPIO and actual GPIO pin control
* @rdev: regulator_dev structure
* @enable: enable GPIO at initial use?
*
* GPIO is enabled in case of initial use. (enable_count is 0)
* GPIO is disabled when it is not shared any more. (enable_count <= 1)
*/
static int regulator_ena_gpio_ctrl(struct regulator_dev *rdev, bool enable)
{
struct regulator_enable_gpio *pin = rdev->ena_pin;
if (!pin)
return -EINVAL;
if (enable) {
/* Enable GPIO at initial use */
if (pin->enable_count == 0)
gpiod_set_value_cansleep(pin->gpiod,
!pin->ena_gpio_invert);
pin->enable_count++;
} else {
if (pin->enable_count > 1) {
pin->enable_count--;
return 0;
}
/* Disable GPIO if not used */
if (pin->enable_count <= 1) {
gpiod_set_value_cansleep(pin->gpiod,
pin->ena_gpio_invert);
pin->enable_count = 0;
}
}
return 0;
}
/**
* _regulator_enable_delay - a delay helper function
* @delay: time to delay in microseconds
*
* Delay for the requested amount of time as per the guidelines in:
*
* Documentation/timers/timers-howto.txt
*
* The assumption here is that regulators will never be enabled in
* atomic context and therefore sleeping functions can be used.
*/
static void _regulator_enable_delay(unsigned int delay)
{
unsigned int ms = delay / 1000;
unsigned int us = delay % 1000;
if (ms > 0) {
/*
* For small enough values, handle super-millisecond
* delays in the usleep_range() call below.
*/
if (ms < 20)
us += ms * 1000;
else
msleep(ms);
}
/*
* Give the scheduler some room to coalesce with any other
* wakeup sources. For delays shorter than 10 us, don't even
* bother setting up high-resolution timers and just busy-
* loop.
*/
if (us >= 10)
usleep_range(us, us + 100);
else
udelay(us);
}
static int _regulator_do_enable(struct regulator_dev *rdev)
{
int ret, delay;
/* Query before enabling in case configuration dependent. */
ret = _regulator_get_enable_time(rdev);
if (ret >= 0) {
delay = ret;
} else {
rdev_warn(rdev, "enable_time() failed: %d\n", ret);
delay = 0;
}
trace_regulator_enable(rdev_get_name(rdev));
if (rdev->desc->off_on_delay) {
/* if needed, keep a distance of off_on_delay from last time
* this regulator was disabled.
*/
unsigned long start_jiffy = jiffies;
unsigned long intended, max_delay, remaining;
max_delay = usecs_to_jiffies(rdev->desc->off_on_delay);
intended = rdev->last_off_jiffy + max_delay;
if (time_before(start_jiffy, intended)) {
/* calc remaining jiffies to deal with one-time
* timer wrapping.
* in case of multiple timer wrapping, either it can be
* detected by out-of-range remaining, or it cannot be
* detected and we gets a panelty of
* _regulator_enable_delay().
*/
remaining = intended - start_jiffy;
if (remaining <= max_delay)
_regulator_enable_delay(
jiffies_to_usecs(remaining));
}
}
if (rdev->ena_pin) {
regulator: core: Fix enable GPIO reference counting Normally _regulator_do_enable() isn't called on an already-enabled rdev. That's because the main caller, _regulator_enable() always calls _regulator_is_enabled() and only calls _regulator_do_enable() if the rdev was not already enabled. However, there is one caller of _regulator_do_enable() that doesn't check: regulator_suspend_finish(). While we might want to make regulator_suspend_finish() behave more like _regulator_enable(), it's probably also a good idea to make _regulator_do_enable() robust if it is called on an already enabled rdev. At the moment, _regulator_do_enable() is _not_ robust for already enabled rdevs if we're using an ena_pin. Each time _regulator_do_enable() is called for an rdev using an ena_pin the reference count of the ena_pin is incremented even if the rdev was already enabled. This is not as intended because the ena_pin is for something else: for keeping track of how many active rdevs there are sharing the same ena_pin. Here's how the reference counting works here: * Each time _regulator_enable() is called we increment rdev->use_count, so _regulator_enable() calls need to be balanced with _regulator_disable() calls. * There is no explicit reference counting in _regulator_do_enable() which is normally just a warapper around rdev->desc->ops->enable() with code for supporting delays. It's not expected that the "ops->enable()" call do reference counting. * Since regulator_ena_gpio_ctrl() does have reference counting (handling the sharing of the pin amongst multiple rdevs), we shouldn't call it if the current rdev is already enabled. Note that as part of this we cleanup (remove) the initting of ena_gpio_state in regulator_register(). In _regulator_do_enable(), _regulator_do_disable() and _regulator_is_enabled() is is clear that ena_gpio_state should be the state of whether this particular rdev has requested the GPIO be enabled. regulator_register() was initting it as the actual state of the pin. Fixes: 967cfb18c0e3 ("regulator: core: manage enable GPIO list") Signed-off-by: Doug Anderson <dianders@chromium.org> Signed-off-by: Mark Brown <broonie@kernel.org> Cc: stable@vger.kernel.org
2015-03-03 23:20:47 +00:00
if (!rdev->ena_gpio_state) {
ret = regulator_ena_gpio_ctrl(rdev, true);
if (ret < 0)
return ret;
rdev->ena_gpio_state = 1;
}
} else if (rdev->desc->ops->enable) {
ret = rdev->desc->ops->enable(rdev);
if (ret < 0)
return ret;
} else {
return -EINVAL;
}
/* Allow the regulator to ramp; it would be useful to extend
* this for bulk operations so that the regulators can ramp
* together. */
trace_regulator_enable_delay(rdev_get_name(rdev));
_regulator_enable_delay(delay);
trace_regulator_enable_complete(rdev_get_name(rdev));
return 0;
}
/* locks held by regulator_enable() */
static int _regulator_enable(struct regulator_dev *rdev)
{
int ret;
lockdep_assert_held_once(&rdev->mutex);
/* check voltage and requested load before enabling */
if (regulator_ops_is_valid(rdev, REGULATOR_CHANGE_DRMS))
drms_uA_update(rdev);
if (rdev->use_count == 0) {
/* The regulator may on if it's not switchable or left on */
ret = _regulator_is_enabled(rdev);
if (ret == -EINVAL || ret == 0) {
if (!regulator_ops_is_valid(rdev,
REGULATOR_CHANGE_STATUS))
return -EPERM;
ret = _regulator_do_enable(rdev);
if (ret < 0)
return ret;
} else if (ret < 0) {
rdev_err(rdev, "is_enabled() failed: %d\n", ret);
return ret;
}
/* Fallthrough on positive return values - already enabled */
}
rdev->use_count++;
return 0;
}
/**
* regulator_enable - enable regulator output
* @regulator: regulator source
*
* Request that the regulator be enabled with the regulator output at
* the predefined voltage or current value. Calls to regulator_enable()
* must be balanced with calls to regulator_disable().
*
* NOTE: the output value can be set by other drivers, boot loader or may be
* hardwired in the regulator.
*/
int regulator_enable(struct regulator *regulator)
{
struct regulator_dev *rdev = regulator->rdev;
int ret = 0;
if (regulator->always_on)
return 0;
if (rdev->supply) {
ret = regulator_enable(rdev->supply);
if (ret != 0)
return ret;
}
mutex_lock(&rdev->mutex);
ret = _regulator_enable(rdev);
mutex_unlock(&rdev->mutex);
if (ret != 0 && rdev->supply)
regulator_disable(rdev->supply);
return ret;
}
EXPORT_SYMBOL_GPL(regulator_enable);
static int _regulator_do_disable(struct regulator_dev *rdev)
{
int ret;
trace_regulator_disable(rdev_get_name(rdev));
if (rdev->ena_pin) {
regulator: core: Fix enable GPIO reference counting Normally _regulator_do_enable() isn't called on an already-enabled rdev. That's because the main caller, _regulator_enable() always calls _regulator_is_enabled() and only calls _regulator_do_enable() if the rdev was not already enabled. However, there is one caller of _regulator_do_enable() that doesn't check: regulator_suspend_finish(). While we might want to make regulator_suspend_finish() behave more like _regulator_enable(), it's probably also a good idea to make _regulator_do_enable() robust if it is called on an already enabled rdev. At the moment, _regulator_do_enable() is _not_ robust for already enabled rdevs if we're using an ena_pin. Each time _regulator_do_enable() is called for an rdev using an ena_pin the reference count of the ena_pin is incremented even if the rdev was already enabled. This is not as intended because the ena_pin is for something else: for keeping track of how many active rdevs there are sharing the same ena_pin. Here's how the reference counting works here: * Each time _regulator_enable() is called we increment rdev->use_count, so _regulator_enable() calls need to be balanced with _regulator_disable() calls. * There is no explicit reference counting in _regulator_do_enable() which is normally just a warapper around rdev->desc->ops->enable() with code for supporting delays. It's not expected that the "ops->enable()" call do reference counting. * Since regulator_ena_gpio_ctrl() does have reference counting (handling the sharing of the pin amongst multiple rdevs), we shouldn't call it if the current rdev is already enabled. Note that as part of this we cleanup (remove) the initting of ena_gpio_state in regulator_register(). In _regulator_do_enable(), _regulator_do_disable() and _regulator_is_enabled() is is clear that ena_gpio_state should be the state of whether this particular rdev has requested the GPIO be enabled. regulator_register() was initting it as the actual state of the pin. Fixes: 967cfb18c0e3 ("regulator: core: manage enable GPIO list") Signed-off-by: Doug Anderson <dianders@chromium.org> Signed-off-by: Mark Brown <broonie@kernel.org> Cc: stable@vger.kernel.org
2015-03-03 23:20:47 +00:00
if (rdev->ena_gpio_state) {
ret = regulator_ena_gpio_ctrl(rdev, false);
if (ret < 0)
return ret;
rdev->ena_gpio_state = 0;
}
} else if (rdev->desc->ops->disable) {
ret = rdev->desc->ops->disable(rdev);
if (ret != 0)
return ret;
}
/* cares about last_off_jiffy only if off_on_delay is required by
* device.
*/
if (rdev->desc->off_on_delay)
rdev->last_off_jiffy = jiffies;
trace_regulator_disable_complete(rdev_get_name(rdev));
return 0;
}
/* locks held by regulator_disable() */
static int _regulator_disable(struct regulator_dev *rdev)
{
int ret = 0;
lockdep_assert_held_once(&rdev->mutex);
if (WARN(rdev->use_count <= 0,
"unbalanced disables for %s\n", rdev_get_name(rdev)))
return -EIO;
/* are we the last user and permitted to disable ? */
if (rdev->use_count == 1 &&
(rdev->constraints && !rdev->constraints->always_on)) {
/* we are last user */
if (regulator_ops_is_valid(rdev, REGULATOR_CHANGE_STATUS)) {
ret = _notifier_call_chain(rdev,
REGULATOR_EVENT_PRE_DISABLE,
NULL);
if (ret & NOTIFY_STOP_MASK)
return -EINVAL;
ret = _regulator_do_disable(rdev);
if (ret < 0) {
rdev_err(rdev, "failed to disable\n");
_notifier_call_chain(rdev,
REGULATOR_EVENT_ABORT_DISABLE,
NULL);
return ret;
}
_notifier_call_chain(rdev, REGULATOR_EVENT_DISABLE,
NULL);
}
rdev->use_count = 0;
} else if (rdev->use_count > 1) {
if (regulator_ops_is_valid(rdev, REGULATOR_CHANGE_DRMS))
drms_uA_update(rdev);
rdev->use_count--;
}
return ret;
}
/**
* regulator_disable - disable regulator output
* @regulator: regulator source
*
* Disable the regulator output voltage or current. Calls to
* regulator_enable() must be balanced with calls to
* regulator_disable().
*
* NOTE: this will only disable the regulator output if no other consumer
* devices have it enabled, the regulator device supports disabling and
* machine constraints permit this operation.
*/
int regulator_disable(struct regulator *regulator)
{
struct regulator_dev *rdev = regulator->rdev;
int ret = 0;
if (regulator->always_on)
return 0;
mutex_lock(&rdev->mutex);
ret = _regulator_disable(rdev);
mutex_unlock(&rdev->mutex);
if (ret == 0 && rdev->supply)
regulator_disable(rdev->supply);
return ret;
}
EXPORT_SYMBOL_GPL(regulator_disable);
/* locks held by regulator_force_disable() */
static int _regulator_force_disable(struct regulator_dev *rdev)
{
int ret = 0;
lockdep_assert_held_once(&rdev->mutex);
ret = _notifier_call_chain(rdev, REGULATOR_EVENT_FORCE_DISABLE |
REGULATOR_EVENT_PRE_DISABLE, NULL);
if (ret & NOTIFY_STOP_MASK)
return -EINVAL;
ret = _regulator_do_disable(rdev);
if (ret < 0) {
rdev_err(rdev, "failed to force disable\n");
_notifier_call_chain(rdev, REGULATOR_EVENT_FORCE_DISABLE |
REGULATOR_EVENT_ABORT_DISABLE, NULL);
return ret;
}
_notifier_call_chain(rdev, REGULATOR_EVENT_FORCE_DISABLE |
REGULATOR_EVENT_DISABLE, NULL);
return 0;
}
/**
* regulator_force_disable - force disable regulator output
* @regulator: regulator source
*
* Forcibly disable the regulator output voltage or current.
* NOTE: this *will* disable the regulator output even if other consumer
* devices have it enabled. This should be used for situations when device
* damage will likely occur if the regulator is not disabled (e.g. over temp).
*/
int regulator_force_disable(struct regulator *regulator)
{
struct regulator_dev *rdev = regulator->rdev;
int ret;
mutex_lock(&rdev->mutex);
regulator->uA_load = 0;
ret = _regulator_force_disable(regulator->rdev);
mutex_unlock(&rdev->mutex);
if (rdev->supply)
while (rdev->open_count--)
regulator_disable(rdev->supply);
return ret;
}
EXPORT_SYMBOL_GPL(regulator_force_disable);
static void regulator_disable_work(struct work_struct *work)
{
struct regulator_dev *rdev = container_of(work, struct regulator_dev,
disable_work.work);
int count, i, ret;
mutex_lock(&rdev->mutex);
BUG_ON(!rdev->deferred_disables);
count = rdev->deferred_disables;
rdev->deferred_disables = 0;
for (i = 0; i < count; i++) {
ret = _regulator_disable(rdev);
if (ret != 0)
rdev_err(rdev, "Deferred disable failed: %d\n", ret);
}
mutex_unlock(&rdev->mutex);
if (rdev->supply) {
for (i = 0; i < count; i++) {
ret = regulator_disable(rdev->supply);
if (ret != 0) {
rdev_err(rdev,
"Supply disable failed: %d\n", ret);
}
}
}
}
/**
* regulator_disable_deferred - disable regulator output with delay
* @regulator: regulator source
* @ms: miliseconds until the regulator is disabled
*
* Execute regulator_disable() on the regulator after a delay. This
* is intended for use with devices that require some time to quiesce.
*
* NOTE: this will only disable the regulator output if no other consumer
* devices have it enabled, the regulator device supports disabling and
* machine constraints permit this operation.
*/
int regulator_disable_deferred(struct regulator *regulator, int ms)
{
struct regulator_dev *rdev = regulator->rdev;
if (regulator->always_on)
return 0;
if (!ms)
return regulator_disable(regulator);
mutex_lock(&rdev->mutex);
rdev->deferred_disables++;
mutex_unlock(&rdev->mutex);
queue_delayed_work(system_power_efficient_wq, &rdev->disable_work,
msecs_to_jiffies(ms));
return 0;
}
EXPORT_SYMBOL_GPL(regulator_disable_deferred);
static int _regulator_is_enabled(struct regulator_dev *rdev)
{
/* A GPIO control always takes precedence */
if (rdev->ena_pin)
return rdev->ena_gpio_state;
/* If we don't know then assume that the regulator is always on */
if (!rdev->desc->ops->is_enabled)
return 1;
return rdev->desc->ops->is_enabled(rdev);
}
static int _regulator_list_voltage(struct regulator *regulator,
unsigned selector, int lock)
{
struct regulator_dev *rdev = regulator->rdev;
const struct regulator_ops *ops = rdev->desc->ops;
int ret;
if (rdev->desc->fixed_uV && rdev->desc->n_voltages == 1 && !selector)
return rdev->desc->fixed_uV;
if (ops->list_voltage) {
if (selector >= rdev->desc->n_voltages)
return -EINVAL;
if (lock)
mutex_lock(&rdev->mutex);
ret = ops->list_voltage(rdev, selector);
if (lock)
mutex_unlock(&rdev->mutex);
} else if (rdev->supply) {
ret = _regulator_list_voltage(rdev->supply, selector, lock);
} else {
return -EINVAL;
}
if (ret > 0) {
if (ret < rdev->constraints->min_uV)
ret = 0;
else if (ret > rdev->constraints->max_uV)
ret = 0;
}
return ret;
}
/**
* regulator_is_enabled - is the regulator output enabled
* @regulator: regulator source
*
* Returns positive if the regulator driver backing the source/client
* has requested that the device be enabled, zero if it hasn't, else a
* negative errno code.
*
* Note that the device backing this regulator handle can have multiple
* users, so it might be enabled even if regulator_enable() was never
* called for this particular source.
*/
int regulator_is_enabled(struct regulator *regulator)
{
int ret;
if (regulator->always_on)
return 1;
mutex_lock(&regulator->rdev->mutex);
ret = _regulator_is_enabled(regulator->rdev);
mutex_unlock(&regulator->rdev->mutex);
return ret;
}
EXPORT_SYMBOL_GPL(regulator_is_enabled);
/**
* regulator_count_voltages - count regulator_list_voltage() selectors
* @regulator: regulator source
*
* Returns number of selectors, or negative errno. Selectors are
* numbered starting at zero, and typically correspond to bitfields
* in hardware registers.
*/
int regulator_count_voltages(struct regulator *regulator)
{
struct regulator_dev *rdev = regulator->rdev;
if (rdev->desc->n_voltages)
return rdev->desc->n_voltages;
if (!rdev->supply)
return -EINVAL;
return regulator_count_voltages(rdev->supply);
}
EXPORT_SYMBOL_GPL(regulator_count_voltages);
/**
* regulator_list_voltage - enumerate supported voltages
* @regulator: regulator source
* @selector: identify voltage to list
* Context: can sleep
*
* Returns a voltage that can be passed to @regulator_set_voltage(),
* zero if this selector code can't be used on this system, or a
* negative errno.
*/
int regulator_list_voltage(struct regulator *regulator, unsigned selector)
{
return _regulator_list_voltage(regulator, selector, 1);
}
EXPORT_SYMBOL_GPL(regulator_list_voltage);
/**
* regulator_get_regmap - get the regulator's register map
* @regulator: regulator source
*
* Returns the register map for the given regulator, or an ERR_PTR value
* if the regulator doesn't use regmap.
*/
struct regmap *regulator_get_regmap(struct regulator *regulator)
{
struct regmap *map = regulator->rdev->regmap;
return map ? map : ERR_PTR(-EOPNOTSUPP);
}
/**
* regulator_get_hardware_vsel_register - get the HW voltage selector register
* @regulator: regulator source
* @vsel_reg: voltage selector register, output parameter
* @vsel_mask: mask for voltage selector bitfield, output parameter
*
* Returns the hardware register offset and bitmask used for setting the
* regulator voltage. This might be useful when configuring voltage-scaling
* hardware or firmware that can make I2C requests behind the kernel's back,
* for example.
*
* On success, the output parameters @vsel_reg and @vsel_mask are filled in
* and 0 is returned, otherwise a negative errno is returned.
*/
int regulator_get_hardware_vsel_register(struct regulator *regulator,
unsigned *vsel_reg,
unsigned *vsel_mask)
{
struct regulator_dev *rdev = regulator->rdev;
const struct regulator_ops *ops = rdev->desc->ops;
if (ops->set_voltage_sel != regulator_set_voltage_sel_regmap)
return -EOPNOTSUPP;
*vsel_reg = rdev->desc->vsel_reg;
*vsel_mask = rdev->desc->vsel_mask;
return 0;
}
EXPORT_SYMBOL_GPL(regulator_get_hardware_vsel_register);
/**
* regulator_list_hardware_vsel - get the HW-specific register value for a selector
* @regulator: regulator source
* @selector: identify voltage to list
*
* Converts the selector to a hardware-specific voltage selector that can be
* directly written to the regulator registers. The address of the voltage
* register can be determined by calling @regulator_get_hardware_vsel_register.
*
* On error a negative errno is returned.
*/
int regulator_list_hardware_vsel(struct regulator *regulator,
unsigned selector)
{
struct regulator_dev *rdev = regulator->rdev;
const struct regulator_ops *ops = rdev->desc->ops;
if (selector >= rdev->desc->n_voltages)
return -EINVAL;
if (ops->set_voltage_sel != regulator_set_voltage_sel_regmap)
return -EOPNOTSUPP;
return selector;
}
EXPORT_SYMBOL_GPL(regulator_list_hardware_vsel);
/**
* regulator_get_linear_step - return the voltage step size between VSEL values
* @regulator: regulator source
*
* Returns the voltage step size between VSEL values for linear
* regulators, or return 0 if the regulator isn't a linear regulator.
*/
unsigned int regulator_get_linear_step(struct regulator *regulator)
{
struct regulator_dev *rdev = regulator->rdev;
return rdev->desc->uV_step;
}
EXPORT_SYMBOL_GPL(regulator_get_linear_step);
/**
* regulator_is_supported_voltage - check if a voltage range can be supported
*
* @regulator: Regulator to check.
* @min_uV: Minimum required voltage in uV.
* @max_uV: Maximum required voltage in uV.
*
* Returns a boolean or a negative error code.
*/
int regulator_is_supported_voltage(struct regulator *regulator,
int min_uV, int max_uV)
{
struct regulator_dev *rdev = regulator->rdev;
int i, voltages, ret;
/* If we can't change voltage check the current voltage */
if (!regulator_ops_is_valid(rdev, REGULATOR_CHANGE_VOLTAGE)) {
ret = regulator_get_voltage(regulator);
if (ret >= 0)
return min_uV <= ret && ret <= max_uV;
else
return ret;
}
/* Any voltage within constrains range is fine? */
if (rdev->desc->continuous_voltage_range)
return min_uV >= rdev->constraints->min_uV &&
max_uV <= rdev->constraints->max_uV;
ret = regulator_count_voltages(regulator);
if (ret < 0)
return ret;
voltages = ret;
for (i = 0; i < voltages; i++) {
ret = regulator_list_voltage(regulator, i);
if (ret >= min_uV && ret <= max_uV)
return 1;
}
return 0;
}
EXPORT_SYMBOL_GPL(regulator_is_supported_voltage);
static int regulator_map_voltage(struct regulator_dev *rdev, int min_uV,
int max_uV)
{
const struct regulator_desc *desc = rdev->desc;
if (desc->ops->map_voltage)
return desc->ops->map_voltage(rdev, min_uV, max_uV);
if (desc->ops->list_voltage == regulator_list_voltage_linear)
return regulator_map_voltage_linear(rdev, min_uV, max_uV);
if (desc->ops->list_voltage == regulator_list_voltage_linear_range)
return regulator_map_voltage_linear_range(rdev, min_uV, max_uV);
return regulator_map_voltage_iterate(rdev, min_uV, max_uV);
}
static int _regulator_call_set_voltage(struct regulator_dev *rdev,
int min_uV, int max_uV,
unsigned *selector)
{
struct pre_voltage_change_data data;
int ret;
data.old_uV = _regulator_get_voltage(rdev);
data.min_uV = min_uV;
data.max_uV = max_uV;
ret = _notifier_call_chain(rdev, REGULATOR_EVENT_PRE_VOLTAGE_CHANGE,
&data);
if (ret & NOTIFY_STOP_MASK)
return -EINVAL;
ret = rdev->desc->ops->set_voltage(rdev, min_uV, max_uV, selector);
if (ret >= 0)
return ret;
_notifier_call_chain(rdev, REGULATOR_EVENT_ABORT_VOLTAGE_CHANGE,
(void *)data.old_uV);
return ret;
}
static int _regulator_call_set_voltage_sel(struct regulator_dev *rdev,
int uV, unsigned selector)
{
struct pre_voltage_change_data data;
int ret;
data.old_uV = _regulator_get_voltage(rdev);
data.min_uV = uV;
data.max_uV = uV;
ret = _notifier_call_chain(rdev, REGULATOR_EVENT_PRE_VOLTAGE_CHANGE,
&data);
if (ret & NOTIFY_STOP_MASK)
return -EINVAL;
ret = rdev->desc->ops->set_voltage_sel(rdev, selector);
if (ret >= 0)
return ret;
_notifier_call_chain(rdev, REGULATOR_EVENT_ABORT_VOLTAGE_CHANGE,
(void *)data.old_uV);
return ret;
}
static int _regulator_set_voltage_time(struct regulator_dev *rdev,
int old_uV, int new_uV)
{
unsigned int ramp_delay = 0;
if (rdev->constraints->ramp_delay)
ramp_delay = rdev->constraints->ramp_delay;
else if (rdev->desc->ramp_delay)
ramp_delay = rdev->desc->ramp_delay;
if (ramp_delay == 0) {
rdev_warn(rdev, "ramp_delay not set\n");
return 0;
}
return DIV_ROUND_UP(abs(new_uV - old_uV), ramp_delay);
}
static int _regulator_do_set_voltage(struct regulator_dev *rdev,
int min_uV, int max_uV)
{
int ret;
int delay = 0;
int best_val = 0;
unsigned int selector;
int old_selector = -1;
const struct regulator_ops *ops = rdev->desc->ops;
int old_uV = _regulator_get_voltage(rdev);
trace_regulator_set_voltage(rdev_get_name(rdev), min_uV, max_uV);
min_uV += rdev->constraints->uV_offset;
max_uV += rdev->constraints->uV_offset;
/*
* If we can't obtain the old selector there is not enough
* info to call set_voltage_time_sel().
*/
if (_regulator_is_enabled(rdev) &&
ops->set_voltage_time_sel && ops->get_voltage_sel) {
old_selector = ops->get_voltage_sel(rdev);
if (old_selector < 0)
return old_selector;
}
if (ops->set_voltage) {
ret = _regulator_call_set_voltage(rdev, min_uV, max_uV,
&selector);
if (ret >= 0) {
if (ops->list_voltage)
best_val = ops->list_voltage(rdev,
selector);
else
best_val = _regulator_get_voltage(rdev);
}
} else if (ops->set_voltage_sel) {
ret = regulator_map_voltage(rdev, min_uV, max_uV);
if (ret >= 0) {
best_val = ops->list_voltage(rdev, ret);
if (min_uV <= best_val && max_uV >= best_val) {
selector = ret;
if (old_selector == selector)
ret = 0;
else
ret = _regulator_call_set_voltage_sel(
rdev, best_val, selector);
} else {
ret = -EINVAL;
}
}
} else {
ret = -EINVAL;
}
if (ret)
goto out;
if (ops->set_voltage_time_sel) {
/*
* Call set_voltage_time_sel if successfully obtained
* old_selector
*/
if (old_selector >= 0 && old_selector != selector)
delay = ops->set_voltage_time_sel(rdev, old_selector,
selector);
} else {
if (old_uV != best_val) {
if (ops->set_voltage_time)
delay = ops->set_voltage_time(rdev, old_uV,
best_val);
else
delay = _regulator_set_voltage_time(rdev,
old_uV,
best_val);
}
}
if (delay < 0) {
rdev_warn(rdev, "failed to get delay: %d\n", delay);
delay = 0;
}
/* Insert any necessary delays */
if (delay >= 1000) {
mdelay(delay / 1000);
udelay(delay % 1000);
} else if (delay) {
udelay(delay);
}
if (best_val >= 0) {
unsigned long data = best_val;
_notifier_call_chain(rdev, REGULATOR_EVENT_VOLTAGE_CHANGE,
(void *)data);
}
out:
trace_regulator_set_voltage_complete(rdev_get_name(rdev), best_val);
return ret;
}
static int regulator_set_voltage_unlocked(struct regulator *regulator,
int min_uV, int max_uV)
{
struct regulator_dev *rdev = regulator->rdev;
int ret = 0;
int old_min_uV, old_max_uV;
int current_uV;
int best_supply_uV = 0;
int supply_change_uV = 0;
/* If we're setting the same range as last time the change
* should be a noop (some cpufreq implementations use the same
* voltage for multiple frequencies, for example).
*/
if (regulator->min_uV == min_uV && regulator->max_uV == max_uV)
goto out;
/* If we're trying to set a range that overlaps the current voltage,
* return successfully even though the regulator does not support
* changing the voltage.
*/
if (!regulator_ops_is_valid(rdev, REGULATOR_CHANGE_VOLTAGE)) {
current_uV = _regulator_get_voltage(rdev);
if (min_uV <= current_uV && current_uV <= max_uV) {
regulator->min_uV = min_uV;
regulator->max_uV = max_uV;
goto out;
}
}
/* sanity check */
if (!rdev->desc->ops->set_voltage &&
!rdev->desc->ops->set_voltage_sel) {
ret = -EINVAL;
goto out;
}
/* constraints check */
ret = regulator_check_voltage(rdev, &min_uV, &max_uV);
if (ret < 0)
goto out;
/* restore original values in case of error */
old_min_uV = regulator->min_uV;
old_max_uV = regulator->max_uV;
regulator->min_uV = min_uV;
regulator->max_uV = max_uV;
ret = regulator_check_consumers(rdev, &min_uV, &max_uV);
if (ret < 0)
goto out2;
if (rdev->supply && (rdev->desc->min_dropout_uV ||
!rdev->desc->ops->get_voltage)) {
int current_supply_uV;
int selector;
selector = regulator_map_voltage(rdev, min_uV, max_uV);
if (selector < 0) {
ret = selector;
goto out2;
}
best_supply_uV = _regulator_list_voltage(regulator, selector, 0);
if (best_supply_uV < 0) {
ret = best_supply_uV;
goto out2;
}
best_supply_uV += rdev->desc->min_dropout_uV;
current_supply_uV = _regulator_get_voltage(rdev->supply->rdev);
if (current_supply_uV < 0) {
ret = current_supply_uV;
goto out2;
}
supply_change_uV = best_supply_uV - current_supply_uV;
}
if (supply_change_uV > 0) {
ret = regulator_set_voltage_unlocked(rdev->supply,
best_supply_uV, INT_MAX);
if (ret) {
dev_err(&rdev->dev, "Failed to increase supply voltage: %d\n",
ret);
goto out2;
}
}
ret = _regulator_do_set_voltage(rdev, min_uV, max_uV);
if (ret < 0)
goto out2;
if (supply_change_uV < 0) {
ret = regulator_set_voltage_unlocked(rdev->supply,
best_supply_uV, INT_MAX);
if (ret)
dev_warn(&rdev->dev, "Failed to decrease supply voltage: %d\n",
ret);
/* No need to fail here */
ret = 0;
}
out:
return ret;
out2:
regulator->min_uV = old_min_uV;
regulator->max_uV = old_max_uV;
return ret;
}
/**
* regulator_set_voltage - set regulator output voltage
* @regulator: regulator source
* @min_uV: Minimum required voltage in uV
* @max_uV: Maximum acceptable voltage in uV
*
* Sets a voltage regulator to the desired output voltage. This can be set
* during any regulator state. IOW, regulator can be disabled or enabled.
*
* If the regulator is enabled then the voltage will change to the new value
* immediately otherwise if the regulator is disabled the regulator will
* output at the new voltage when enabled.
*
* NOTE: If the regulator is shared between several devices then the lowest
* request voltage that meets the system constraints will be used.
* Regulator system constraints must be set for this regulator before
* calling this function otherwise this call will fail.
*/
int regulator_set_voltage(struct regulator *regulator, int min_uV, int max_uV)
{
int ret = 0;
regulator_lock_supply(regulator->rdev);
ret = regulator_set_voltage_unlocked(regulator, min_uV, max_uV);
regulator_unlock_supply(regulator->rdev);
return ret;
}
EXPORT_SYMBOL_GPL(regulator_set_voltage);
/**
* regulator_set_voltage_time - get raise/fall time
* @regulator: regulator source
* @old_uV: starting voltage in microvolts
* @new_uV: target voltage in microvolts
*
* Provided with the starting and ending voltage, this function attempts to
* calculate the time in microseconds required to rise or fall to this new
* voltage.
*/
int regulator_set_voltage_time(struct regulator *regulator,
int old_uV, int new_uV)
{
struct regulator_dev *rdev = regulator->rdev;
const struct regulator_ops *ops = rdev->desc->ops;
int old_sel = -1;
int new_sel = -1;
int voltage;
int i;
if (ops->set_voltage_time)
return ops->set_voltage_time(rdev, old_uV, new_uV);
else if (!ops->set_voltage_time_sel)
return _regulator_set_voltage_time(rdev, old_uV, new_uV);
/* Currently requires operations to do this */
if (!ops->list_voltage || !rdev->desc->n_voltages)
return -EINVAL;
for (i = 0; i < rdev->desc->n_voltages; i++) {
/* We only look for exact voltage matches here */
voltage = regulator_list_voltage(regulator, i);
if (voltage < 0)
return -EINVAL;
if (voltage == 0)
continue;
if (voltage == old_uV)
old_sel = i;
if (voltage == new_uV)
new_sel = i;
}
if (old_sel < 0 || new_sel < 0)
return -EINVAL;
return ops->set_voltage_time_sel(rdev, old_sel, new_sel);
}
EXPORT_SYMBOL_GPL(regulator_set_voltage_time);
/**
* regulator_set_voltage_time_sel - get raise/fall time
* @rdev: regulator source device
* @old_selector: selector for starting voltage
* @new_selector: selector for target voltage
*
* Provided with the starting and target voltage selectors, this function
* returns time in microseconds required to rise or fall to this new voltage
*
* Drivers providing ramp_delay in regulation_constraints can use this as their
* set_voltage_time_sel() operation.
*/
int regulator_set_voltage_time_sel(struct regulator_dev *rdev,
unsigned int old_selector,
unsigned int new_selector)
{
int old_volt, new_volt;
/* sanity check */
if (!rdev->desc->ops->list_voltage)
return -EINVAL;
old_volt = rdev->desc->ops->list_voltage(rdev, old_selector);
new_volt = rdev->desc->ops->list_voltage(rdev, new_selector);
if (rdev->desc->ops->set_voltage_time)
return rdev->desc->ops->set_voltage_time(rdev, old_volt,
new_volt);
else
return _regulator_set_voltage_time(rdev, old_volt, new_volt);
}
EXPORT_SYMBOL_GPL(regulator_set_voltage_time_sel);
/**
* regulator_sync_voltage - re-apply last regulator output voltage
* @regulator: regulator source
*
* Re-apply the last configured voltage. This is intended to be used
* where some external control source the consumer is cooperating with
* has caused the configured voltage to change.
*/
int regulator_sync_voltage(struct regulator *regulator)
{
struct regulator_dev *rdev = regulator->rdev;
int ret, min_uV, max_uV;
mutex_lock(&rdev->mutex);
if (!rdev->desc->ops->set_voltage &&
!rdev->desc->ops->set_voltage_sel) {
ret = -EINVAL;
goto out;
}
/* This is only going to work if we've had a voltage configured. */
if (!regulator->min_uV && !regulator->max_uV) {
ret = -EINVAL;
goto out;
}
min_uV = regulator->min_uV;
max_uV = regulator->max_uV;
/* This should be a paranoia check... */
ret = regulator_check_voltage(rdev, &min_uV, &max_uV);
if (ret < 0)
goto out;
ret = regulator_check_consumers(rdev, &min_uV, &max_uV);
if (ret < 0)
goto out;
ret = _regulator_do_set_voltage(rdev, min_uV, max_uV);
out:
mutex_unlock(&rdev->mutex);
return ret;
}
EXPORT_SYMBOL_GPL(regulator_sync_voltage);
static int _regulator_get_voltage(struct regulator_dev *rdev)
{
int sel, ret;
bool bypassed;
if (rdev->desc->ops->get_bypass) {
ret = rdev->desc->ops->get_bypass(rdev, &bypassed);
if (ret < 0)
return ret;
if (bypassed) {
/* if bypassed the regulator must have a supply */
regulator: core: Add early supply resolution for regulators The call to set_machine_constraints() in regulator_register(), will attempt to get the voltage for the regulator. If a regulator is in bypass will fail to get the voltage (ie. it's bypass voltage) and hence register the regulator, because the supply for the regulator has not been resolved yet. To fix this, add a call to regulator_resolve_supply() before we call set_machine_constraints(). If the call to regulator_resolve_supply() fails, rather than returning an error at this point, allow the registration of the regulator to continue because for some regulators resolving the supply at this point may not be necessary and it will be resolved later as more regulators are added. Furthermore, if the supply is still not resolved for a bypassed regulator, this will be detected when we attempt to get the voltage for the regulator and an error will be propagated at this point. If a bypassed regulator does not have a supply when we attempt to get the voltage, rather than returing -EINVAL, return -EPROBE_DEFER instead to allow the registration of the regulator to be deferred and tried again later. Please note that regulator_resolve_supply() will call regulator_dev_lookup() which may acquire the regulator_list_mutex. To avoid any deadlocks we cannot hold the regulator_list_mutex when calling regulator_resolve_supply(). Therefore, rather than holding the lock around a large portion of the registration code, just hold the lock when aquiring any GPIOs and setting up supplies because these sections may add entries to the regulator_map_list and regulator_ena_gpio_list, respectively. Signed-off-by: Jon Hunter <jonathanh@nvidia.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2016-04-26 10:29:45 +00:00
if (!rdev->supply) {
rdev_err(rdev,
"bypassed regulator has no supply!\n");
return -EPROBE_DEFER;
}
return _regulator_get_voltage(rdev->supply->rdev);
}
}
if (rdev->desc->ops->get_voltage_sel) {
sel = rdev->desc->ops->get_voltage_sel(rdev);
if (sel < 0)
return sel;
ret = rdev->desc->ops->list_voltage(rdev, sel);
} else if (rdev->desc->ops->get_voltage) {
ret = rdev->desc->ops->get_voltage(rdev);
} else if (rdev->desc->ops->list_voltage) {
ret = rdev->desc->ops->list_voltage(rdev, 0);
} else if (rdev->desc->fixed_uV && (rdev->desc->n_voltages == 1)) {
ret = rdev->desc->fixed_uV;
} else if (rdev->supply) {
ret = _regulator_get_voltage(rdev->supply->rdev);
} else {
return -EINVAL;
}
if (ret < 0)
return ret;
return ret - rdev->constraints->uV_offset;
}
/**
* regulator_get_voltage - get regulator output voltage
* @regulator: regulator source
*
* This returns the current regulator voltage in uV.
*
* NOTE: If the regulator is disabled it will return the voltage value. This
* function should not be used to determine regulator state.
*/
int regulator_get_voltage(struct regulator *regulator)
{
int ret;
regulator_lock_supply(regulator->rdev);
ret = _regulator_get_voltage(regulator->rdev);
regulator_unlock_supply(regulator->rdev);
return ret;
}
EXPORT_SYMBOL_GPL(regulator_get_voltage);
/**
* regulator_set_current_limit - set regulator output current limit
* @regulator: regulator source
* @min_uA: Minimum supported current in uA
* @max_uA: Maximum supported current in uA
*
* Sets current sink to the desired output current. This can be set during
* any regulator state. IOW, regulator can be disabled or enabled.
*
* If the regulator is enabled then the current will change to the new value
* immediately otherwise if the regulator is disabled the regulator will
* output at the new current when enabled.
*
* NOTE: Regulator system constraints must be set for this regulator before
* calling this function otherwise this call will fail.
*/
int regulator_set_current_limit(struct regulator *regulator,
int min_uA, int max_uA)
{
struct regulator_dev *rdev = regulator->rdev;
int ret;
mutex_lock(&rdev->mutex);
/* sanity check */
if (!rdev->desc->ops->set_current_limit) {
ret = -EINVAL;
goto out;
}
/* constraints check */
ret = regulator_check_current_limit(rdev, &min_uA, &max_uA);
if (ret < 0)
goto out;
ret = rdev->desc->ops->set_current_limit(rdev, min_uA, max_uA);
out:
mutex_unlock(&rdev->mutex);
return ret;
}
EXPORT_SYMBOL_GPL(regulator_set_current_limit);
static int _regulator_get_current_limit(struct regulator_dev *rdev)
{
int ret;
mutex_lock(&rdev->mutex);
/* sanity check */
if (!rdev->desc->ops->get_current_limit) {
ret = -EINVAL;
goto out;
}
ret = rdev->desc->ops->get_current_limit(rdev);
out:
mutex_unlock(&rdev->mutex);
return ret;
}
/**
* regulator_get_current_limit - get regulator output current
* @regulator: regulator source
*
* This returns the current supplied by the specified current sink in uA.
*
* NOTE: If the regulator is disabled it will return the current value. This
* function should not be used to determine regulator state.
*/
int regulator_get_current_limit(struct regulator *regulator)
{
return _regulator_get_current_limit(regulator->rdev);
}
EXPORT_SYMBOL_GPL(regulator_get_current_limit);
/**
* regulator_set_mode - set regulator operating mode
* @regulator: regulator source
* @mode: operating mode - one of the REGULATOR_MODE constants
*
* Set regulator operating mode to increase regulator efficiency or improve
* regulation performance.
*
* NOTE: Regulator system constraints must be set for this regulator before
* calling this function otherwise this call will fail.
*/
int regulator_set_mode(struct regulator *regulator, unsigned int mode)
{
struct regulator_dev *rdev = regulator->rdev;
int ret;
int regulator_curr_mode;
mutex_lock(&rdev->mutex);
/* sanity check */
if (!rdev->desc->ops->set_mode) {
ret = -EINVAL;
goto out;
}
/* return if the same mode is requested */
if (rdev->desc->ops->get_mode) {
regulator_curr_mode = rdev->desc->ops->get_mode(rdev);
if (regulator_curr_mode == mode) {
ret = 0;
goto out;
}
}
/* constraints check */
ret = regulator_mode_constrain(rdev, &mode);
if (ret < 0)
goto out;
ret = rdev->desc->ops->set_mode(rdev, mode);
out:
mutex_unlock(&rdev->mutex);
return ret;
}
EXPORT_SYMBOL_GPL(regulator_set_mode);
static unsigned int _regulator_get_mode(struct regulator_dev *rdev)
{
int ret;
mutex_lock(&rdev->mutex);
/* sanity check */
if (!rdev->desc->ops->get_mode) {
ret = -EINVAL;
goto out;
}
ret = rdev->desc->ops->get_mode(rdev);
out:
mutex_unlock(&rdev->mutex);
return ret;
}
/**
* regulator_get_mode - get regulator operating mode
* @regulator: regulator source
*
* Get the current regulator operating mode.
*/
unsigned int regulator_get_mode(struct regulator *regulator)
{
return _regulator_get_mode(regulator->rdev);
}
EXPORT_SYMBOL_GPL(regulator_get_mode);
/**
* regulator_set_load - set regulator load
* @regulator: regulator source
* @uA_load: load current
*
* Notifies the regulator core of a new device load. This is then used by
* DRMS (if enabled by constraints) to set the most efficient regulator
* operating mode for the new regulator loading.
*
* Consumer devices notify their supply regulator of the maximum power
* they will require (can be taken from device datasheet in the power
* consumption tables) when they change operational status and hence power
* state. Examples of operational state changes that can affect power
* consumption are :-
*
* o Device is opened / closed.
* o Device I/O is about to begin or has just finished.
* o Device is idling in between work.
*
* This information is also exported via sysfs to userspace.
*
* DRMS will sum the total requested load on the regulator and change
* to the most efficient operating mode if platform constraints allow.
*
* On error a negative errno is returned.
*/
int regulator_set_load(struct regulator *regulator, int uA_load)
{
struct regulator_dev *rdev = regulator->rdev;
int ret;
regulator: Fix recursive mutex lockdep warning A recursive lockdep warning occurs if you call regulator_set_optimum_mode() on a regulator with a supply because there is no nesting annotation for the rdev->mutex. To avoid this warning, get the supply's load before locking the regulator's mutex to avoid grabbing the same class of lock twice. ============================================= [ INFO: possible recursive locking detected ] 3.4.0 #3257 Tainted: G W --------------------------------------------- swapper/0/1 is trying to acquire lock: (&rdev->mutex){+.+.+.}, at: [<c036e9e0>] regulator_get_voltage+0x18/0x38 but task is already holding lock: (&rdev->mutex){+.+.+.}, at: [<c036ef38>] regulator_set_optimum_mode+0x24/0x224 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&rdev->mutex); lock(&rdev->mutex); *** DEADLOCK *** May be due to missing lock nesting notation 3 locks held by swapper/0/1: #0: (&__lockdep_no_validate__){......}, at: [<c03dbb48>] __driver_attach+0x40/0x8c #1: (&__lockdep_no_validate__){......}, at: [<c03dbb58>] __driver_attach+0x50/0x8c #2: (&rdev->mutex){+.+.+.}, at: [<c036ef38>] regulator_set_optimum_mode+0x24/0x224 stack backtrace: [<c001521c>] (unwind_backtrace+0x0/0x12c) from [<c00cc4d4>] (validate_chain+0x760/0x1080) [<c00cc4d4>] (validate_chain+0x760/0x1080) from [<c00cd744>] (__lock_acquire+0x950/0xa10) [<c00cd744>] (__lock_acquire+0x950/0xa10) from [<c00cd990>] (lock_acquire+0x18c/0x1e8) [<c00cd990>] (lock_acquire+0x18c/0x1e8) from [<c080c248>] (mutex_lock_nested+0x68/0x3c4) [<c080c248>] (mutex_lock_nested+0x68/0x3c4) from [<c036e9e0>] (regulator_get_voltage+0x18/0x38) [<c036e9e0>] (regulator_get_voltage+0x18/0x38) from [<c036efb8>] (regulator_set_optimum_mode+0xa4/0x224) ... Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2012-07-03 02:21:06 +00:00
mutex_lock(&rdev->mutex);
regulator->uA_load = uA_load;
ret = drms_uA_update(rdev);
mutex_unlock(&rdev->mutex);
return ret;
}
EXPORT_SYMBOL_GPL(regulator_set_load);
/**
* regulator_allow_bypass - allow the regulator to go into bypass mode
*
* @regulator: Regulator to configure
* @enable: enable or disable bypass mode
*
* Allow the regulator to go into bypass mode if all other consumers
* for the regulator also enable bypass mode and the machine
* constraints allow this. Bypass mode means that the regulator is
* simply passing the input directly to the output with no regulation.
*/
int regulator_allow_bypass(struct regulator *regulator, bool enable)
{
struct regulator_dev *rdev = regulator->rdev;
int ret = 0;
if (!rdev->desc->ops->set_bypass)
return 0;
if (!regulator_ops_is_valid(rdev, REGULATOR_CHANGE_BYPASS))
return 0;
mutex_lock(&rdev->mutex);
if (enable && !regulator->bypass) {
rdev->bypass_count++;
if (rdev->bypass_count == rdev->open_count) {
ret = rdev->desc->ops->set_bypass(rdev, enable);
if (ret != 0)
rdev->bypass_count--;
}
} else if (!enable && regulator->bypass) {
rdev->bypass_count--;
if (rdev->bypass_count != rdev->open_count) {
ret = rdev->desc->ops->set_bypass(rdev, enable);
if (ret != 0)
rdev->bypass_count++;
}
}
if (ret == 0)
regulator->bypass = enable;
mutex_unlock(&rdev->mutex);
return ret;
}
EXPORT_SYMBOL_GPL(regulator_allow_bypass);
/**
* regulator_register_notifier - register regulator event notifier
* @regulator: regulator source
* @nb: notifier block
*
* Register notifier block to receive regulator events.
*/
int regulator_register_notifier(struct regulator *regulator,
struct notifier_block *nb)
{
return blocking_notifier_chain_register(&regulator->rdev->notifier,
nb);
}
EXPORT_SYMBOL_GPL(regulator_register_notifier);
/**
* regulator_unregister_notifier - unregister regulator event notifier
* @regulator: regulator source
* @nb: notifier block
*
* Unregister regulator event notifier block.
*/
int regulator_unregister_notifier(struct regulator *regulator,
struct notifier_block *nb)
{
return blocking_notifier_chain_unregister(&regulator->rdev->notifier,
nb);
}
EXPORT_SYMBOL_GPL(regulator_unregister_notifier);
/* notify regulator consumers and downstream regulator consumers.
* Note mutex must be held by caller.
*/
static int _notifier_call_chain(struct regulator_dev *rdev,
unsigned long event, void *data)
{
/* call rdev chain first */
return blocking_notifier_call_chain(&rdev->notifier, event, data);
}
/**
* regulator_bulk_get - get multiple regulator consumers
*
* @dev: Device to supply
* @num_consumers: Number of consumers to register
* @consumers: Configuration of consumers; clients are stored here.
*
* @return 0 on success, an errno on failure.
*
* This helper function allows drivers to get several regulator
* consumers in one operation. If any of the regulators cannot be
* acquired then any regulators that were allocated will be freed
* before returning to the caller.
*/
int regulator_bulk_get(struct device *dev, int num_consumers,
struct regulator_bulk_data *consumers)
{
int i;
int ret;
for (i = 0; i < num_consumers; i++)
consumers[i].consumer = NULL;
for (i = 0; i < num_consumers; i++) {
consumers[i].consumer = regulator_get(dev,
consumers[i].supply);
if (IS_ERR(consumers[i].consumer)) {
ret = PTR_ERR(consumers[i].consumer);
dev_err(dev, "Failed to get supply '%s': %d\n",
consumers[i].supply, ret);
consumers[i].consumer = NULL;
goto err;
}
}
return 0;
err:
while (--i >= 0)
regulator_put(consumers[i].consumer);
return ret;
}
EXPORT_SYMBOL_GPL(regulator_bulk_get);
static void regulator_bulk_enable_async(void *data, async_cookie_t cookie)
{
struct regulator_bulk_data *bulk = data;
bulk->ret = regulator_enable(bulk->consumer);
}
/**
* regulator_bulk_enable - enable multiple regulator consumers
*
* @num_consumers: Number of consumers
* @consumers: Consumer data; clients are stored here.
* @return 0 on success, an errno on failure
*
* This convenience API allows consumers to enable multiple regulator
* clients in a single API call. If any consumers cannot be enabled
* then any others that were enabled will be disabled again prior to
* return.
*/
int regulator_bulk_enable(int num_consumers,
struct regulator_bulk_data *consumers)
{
ASYNC_DOMAIN_EXCLUSIVE(async_domain);
int i;
int ret = 0;
for (i = 0; i < num_consumers; i++) {
if (consumers[i].consumer->always_on)
consumers[i].ret = 0;
else
async_schedule_domain(regulator_bulk_enable_async,
&consumers[i], &async_domain);
}
async_synchronize_full_domain(&async_domain);
/* If any consumer failed we need to unwind any that succeeded */
for (i = 0; i < num_consumers; i++) {
if (consumers[i].ret != 0) {
ret = consumers[i].ret;
goto err;
}
}
return 0;
err:
for (i = 0; i < num_consumers; i++) {
if (consumers[i].ret < 0)
pr_err("Failed to enable %s: %d\n", consumers[i].supply,
consumers[i].ret);
else
regulator_disable(consumers[i].consumer);
}
return ret;
}
EXPORT_SYMBOL_GPL(regulator_bulk_enable);
/**
* regulator_bulk_disable - disable multiple regulator consumers
*
* @num_consumers: Number of consumers
* @consumers: Consumer data; clients are stored here.
* @return 0 on success, an errno on failure
*
* This convenience API allows consumers to disable multiple regulator
* clients in a single API call. If any consumers cannot be disabled
* then any others that were disabled will be enabled again prior to
* return.
*/
int regulator_bulk_disable(int num_consumers,
struct regulator_bulk_data *consumers)
{
int i;
int ret, r;
for (i = num_consumers - 1; i >= 0; --i) {
ret = regulator_disable(consumers[i].consumer);
if (ret != 0)
goto err;
}
return 0;
err:
pr_err("Failed to disable %s: %d\n", consumers[i].supply, ret);
for (++i; i < num_consumers; ++i) {
r = regulator_enable(consumers[i].consumer);
if (r != 0)
pr_err("Failed to reename %s: %d\n",
consumers[i].supply, r);
}
return ret;
}
EXPORT_SYMBOL_GPL(regulator_bulk_disable);
/**
* regulator_bulk_force_disable - force disable multiple regulator consumers
*
* @num_consumers: Number of consumers
* @consumers: Consumer data; clients are stored here.
* @return 0 on success, an errno on failure
*
* This convenience API allows consumers to forcibly disable multiple regulator
* clients in a single API call.
* NOTE: This should be used for situations when device damage will
* likely occur if the regulators are not disabled (e.g. over temp).
* Although regulator_force_disable function call for some consumers can
* return error numbers, the function is called for all consumers.
*/
int regulator_bulk_force_disable(int num_consumers,
struct regulator_bulk_data *consumers)
{
int i;
int ret;
for (i = 0; i < num_consumers; i++)
consumers[i].ret =
regulator_force_disable(consumers[i].consumer);
for (i = 0; i < num_consumers; i++) {
if (consumers[i].ret != 0) {
ret = consumers[i].ret;
goto out;
}
}
return 0;
out:
return ret;
}
EXPORT_SYMBOL_GPL(regulator_bulk_force_disable);
/**
* regulator_bulk_free - free multiple regulator consumers
*
* @num_consumers: Number of consumers
* @consumers: Consumer data; clients are stored here.
*
* This convenience API allows consumers to free multiple regulator
* clients in a single API call.
*/
void regulator_bulk_free(int num_consumers,
struct regulator_bulk_data *consumers)
{
int i;
for (i = 0; i < num_consumers; i++) {
regulator_put(consumers[i].consumer);
consumers[i].consumer = NULL;
}
}
EXPORT_SYMBOL_GPL(regulator_bulk_free);
/**
* regulator_notifier_call_chain - call regulator event notifier
* @rdev: regulator source
* @event: notifier block
* @data: callback-specific data.
*
* Called by regulator drivers to notify clients a regulator event has
* occurred. We also notify regulator clients downstream.
* Note lock must be held by caller.
*/
int regulator_notifier_call_chain(struct regulator_dev *rdev,
unsigned long event, void *data)
{
lockdep_assert_held_once(&rdev->mutex);
_notifier_call_chain(rdev, event, data);
return NOTIFY_DONE;
}
EXPORT_SYMBOL_GPL(regulator_notifier_call_chain);
/**
* regulator_mode_to_status - convert a regulator mode into a status
*
* @mode: Mode to convert
*
* Convert a regulator mode into a status.
*/
int regulator_mode_to_status(unsigned int mode)
{
switch (mode) {
case REGULATOR_MODE_FAST:
return REGULATOR_STATUS_FAST;
case REGULATOR_MODE_NORMAL:
return REGULATOR_STATUS_NORMAL;
case REGULATOR_MODE_IDLE:
return REGULATOR_STATUS_IDLE;
case REGULATOR_MODE_STANDBY:
return REGULATOR_STATUS_STANDBY;
default:
return REGULATOR_STATUS_UNDEFINED;
}
}
EXPORT_SYMBOL_GPL(regulator_mode_to_status);
static struct attribute *regulator_dev_attrs[] = {
&dev_attr_name.attr,
&dev_attr_num_users.attr,
&dev_attr_type.attr,
&dev_attr_microvolts.attr,
&dev_attr_microamps.attr,
&dev_attr_opmode.attr,
&dev_attr_state.attr,
&dev_attr_status.attr,
&dev_attr_bypass.attr,
&dev_attr_requested_microamps.attr,
&dev_attr_min_microvolts.attr,
&dev_attr_max_microvolts.attr,
&dev_attr_min_microamps.attr,
&dev_attr_max_microamps.attr,
&dev_attr_suspend_standby_state.attr,
&dev_attr_suspend_mem_state.attr,
&dev_attr_suspend_disk_state.attr,
&dev_attr_suspend_standby_microvolts.attr,
&dev_attr_suspend_mem_microvolts.attr,
&dev_attr_suspend_disk_microvolts.attr,
&dev_attr_suspend_standby_mode.attr,
&dev_attr_suspend_mem_mode.attr,
&dev_attr_suspend_disk_mode.attr,
NULL
};
/*
* To avoid cluttering sysfs (and memory) with useless state, only
* create attributes that can be meaningfully displayed.
*/
static umode_t regulator_attr_is_visible(struct kobject *kobj,
struct attribute *attr, int idx)
{
struct device *dev = kobj_to_dev(kobj);
struct regulator_dev *rdev = dev_to_rdev(dev);
const struct regulator_ops *ops = rdev->desc->ops;
umode_t mode = attr->mode;
/* these three are always present */
if (attr == &dev_attr_name.attr ||
attr == &dev_attr_num_users.attr ||
attr == &dev_attr_type.attr)
return mode;
/* some attributes need specific methods to be displayed */
if (attr == &dev_attr_microvolts.attr) {
if ((ops->get_voltage && ops->get_voltage(rdev) >= 0) ||
(ops->get_voltage_sel && ops->get_voltage_sel(rdev) >= 0) ||
(ops->list_voltage && ops->list_voltage(rdev, 0) >= 0) ||
(rdev->desc->fixed_uV && rdev->desc->n_voltages == 1))
return mode;
return 0;
}
if (attr == &dev_attr_microamps.attr)
return ops->get_current_limit ? mode : 0;
if (attr == &dev_attr_opmode.attr)
return ops->get_mode ? mode : 0;
if (attr == &dev_attr_state.attr)
return (rdev->ena_pin || ops->is_enabled) ? mode : 0;
if (attr == &dev_attr_status.attr)
return ops->get_status ? mode : 0;
if (attr == &dev_attr_bypass.attr)
return ops->get_bypass ? mode : 0;
/* some attributes are type-specific */
if (attr == &dev_attr_requested_microamps.attr)
return rdev->desc->type == REGULATOR_CURRENT ? mode : 0;
/* constraints need specific supporting methods */
if (attr == &dev_attr_min_microvolts.attr ||
attr == &dev_attr_max_microvolts.attr)
return (ops->set_voltage || ops->set_voltage_sel) ? mode : 0;
if (attr == &dev_attr_min_microamps.attr ||
attr == &dev_attr_max_microamps.attr)
return ops->set_current_limit ? mode : 0;
if (attr == &dev_attr_suspend_standby_state.attr ||
attr == &dev_attr_suspend_mem_state.attr ||
attr == &dev_attr_suspend_disk_state.attr)
return mode;
if (attr == &dev_attr_suspend_standby_microvolts.attr ||
attr == &dev_attr_suspend_mem_microvolts.attr ||
attr == &dev_attr_suspend_disk_microvolts.attr)
return ops->set_suspend_voltage ? mode : 0;
if (attr == &dev_attr_suspend_standby_mode.attr ||
attr == &dev_attr_suspend_mem_mode.attr ||
attr == &dev_attr_suspend_disk_mode.attr)
return ops->set_suspend_mode ? mode : 0;
return mode;
}
static const struct attribute_group regulator_dev_group = {
.attrs = regulator_dev_attrs,
.is_visible = regulator_attr_is_visible,
};
static const struct attribute_group *regulator_dev_groups[] = {
&regulator_dev_group,
NULL
};
static void regulator_dev_release(struct device *dev)
{
struct regulator_dev *rdev = dev_get_drvdata(dev);
kfree(rdev->constraints);
of_node_put(rdev->dev.of_node);
kfree(rdev);
}
static struct class regulator_class = {
.name = "regulator",
.dev_release = regulator_dev_release,
.dev_groups = regulator_dev_groups,
};
static void rdev_init_debugfs(struct regulator_dev *rdev)
{
struct device *parent = rdev->dev.parent;
const char *rname = rdev_get_name(rdev);
char name[NAME_MAX];
/* Avoid duplicate debugfs directory names */
if (parent && rname == rdev->desc->name) {
snprintf(name, sizeof(name), "%s-%s", dev_name(parent),
rname);
rname = name;
}
rdev->debugfs = debugfs_create_dir(rname, debugfs_root);
if (!rdev->debugfs) {
rdev_warn(rdev, "Failed to create debugfs directory\n");
return;
}
debugfs_create_u32("use_count", 0444, rdev->debugfs,
&rdev->use_count);
debugfs_create_u32("open_count", 0444, rdev->debugfs,
&rdev->open_count);
debugfs_create_u32("bypass_count", 0444, rdev->debugfs,
&rdev->bypass_count);
}
2016-03-23 23:59:34 +00:00
static int regulator_register_resolve_supply(struct device *dev, void *data)
{
struct regulator_dev *rdev = dev_to_rdev(dev);
if (regulator_resolve_supply(rdev))
rdev_dbg(rdev, "unable to resolve supply\n");
return 0;
2016-03-23 23:59:34 +00:00
}
/**
* regulator_register - register regulator
* @regulator_desc: regulator to register
* @cfg: runtime configuration for regulator
*
* Called by regulator drivers to register a regulator.
* Returns a valid pointer to struct regulator_dev on success
* or an ERR_PTR() on error.
*/
struct regulator_dev *
regulator_register(const struct regulator_desc *regulator_desc,
const struct regulator_config *cfg)
{
const struct regulation_constraints *constraints = NULL;
const struct regulator_init_data *init_data;
struct regulator_config *config = NULL;
static atomic_t regulator_no = ATOMIC_INIT(-1);
struct regulator_dev *rdev;
struct device *dev;
regulator: core - Rework machine API to remove string based functions. This improves the machine level API in order to configure regulator constraints and consumers as platform data and removes the old string based API that required several calls to set up each regulator. The intention is to create a struct regulator_init_data, populate it's fields with constraints, consumers devices, etc and then register the regulator device from board.c in the standard Linux way. e.g. regulator LDO2 (supplying codec and sim) platform data. /* regulator LDO2 consumer devices */ static struct regulator_consumer_supply ldo2_consumers[] = { { .dev = &platform_audio_device.dev, .supply = "codec_avdd", }, { .dev = &platform_sim_device.dev, .supply = "sim_vcc", } }; /* regulator LDO2 constraints */ static struct regulator_init_data ldo2_data = { .constraints = { .min_uV = 3300000, .max_uV = 3300000, .valid_modes_mask = REGULATOR_MODE_NORMAL, .apply_uV = 1, }, .num_consumer_supplies = ARRAY_SIZE(ldo2_consumers), .consumer_supplies = ldo2_consumers, }; /* machine regulator devices with thier consumers and constraints */ static struct platform_device wm8350_regulator_devices[] = { { .name = "wm8350-regulator", .id = WM8350_LDO_2, .dev = { .platform_data = &ldo2_data, }, }, }; Changes in detail:- o Removed all const char* regulator config functions in machine API. o Created new struct regulator_init_data to contain regulator machine configuration constraints and consmuers. o Changed set_supply(), set_machine_constraints(), set_consumer_device_supply() to remove their string identifier parameters. Also made them static and moved functions nearer top of core.c. o Removed no longer used inline func to_rdev() o Added regulator_get_init_drvdata() to retrieve init data. o Added struct device* as parameter to regulator_register(). o Changed my email address. Signed-off-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2008-10-10 12:22:20 +00:00
int ret, i;
if (regulator_desc == NULL || cfg == NULL)
return ERR_PTR(-EINVAL);
dev = cfg->dev;
WARN_ON(!dev);
if (regulator_desc->name == NULL || regulator_desc->ops == NULL)
return ERR_PTR(-EINVAL);
if (regulator_desc->type != REGULATOR_VOLTAGE &&
regulator_desc->type != REGULATOR_CURRENT)
return ERR_PTR(-EINVAL);
/* Only one of each should be implemented */
WARN_ON(regulator_desc->ops->get_voltage &&
regulator_desc->ops->get_voltage_sel);
WARN_ON(regulator_desc->ops->set_voltage &&
regulator_desc->ops->set_voltage_sel);
/* If we're using selectors we must implement list_voltage. */
if (regulator_desc->ops->get_voltage_sel &&
!regulator_desc->ops->list_voltage) {
return ERR_PTR(-EINVAL);
}
if (regulator_desc->ops->set_voltage_sel &&
!regulator_desc->ops->list_voltage) {
return ERR_PTR(-EINVAL);
}
rdev = kzalloc(sizeof(struct regulator_dev), GFP_KERNEL);
if (rdev == NULL)
return ERR_PTR(-ENOMEM);
/*
* Duplicate the config so the driver could override it after
* parsing init data.
*/
config = kmemdup(cfg, sizeof(*cfg), GFP_KERNEL);
if (config == NULL) {
kfree(rdev);
return ERR_PTR(-ENOMEM);
}
init_data = regulator_of_get_init_data(dev, regulator_desc, config,
&rdev->dev.of_node);
if (!init_data) {
init_data = config->init_data;
rdev->dev.of_node = of_node_get(config->of_node);
}
mutex_init(&rdev->mutex);
rdev->reg_data = config->driver_data;
rdev->owner = regulator_desc->owner;
rdev->desc = regulator_desc;
if (config->regmap)
rdev->regmap = config->regmap;
else if (dev_get_regmap(dev, NULL))
rdev->regmap = dev_get_regmap(dev, NULL);
else if (dev->parent)
rdev->regmap = dev_get_regmap(dev->parent, NULL);
INIT_LIST_HEAD(&rdev->consumer_list);
INIT_LIST_HEAD(&rdev->list);
BLOCKING_INIT_NOTIFIER_HEAD(&rdev->notifier);
INIT_DELAYED_WORK(&rdev->disable_work, regulator_disable_work);
regulator: core - Rework machine API to remove string based functions. This improves the machine level API in order to configure regulator constraints and consumers as platform data and removes the old string based API that required several calls to set up each regulator. The intention is to create a struct regulator_init_data, populate it's fields with constraints, consumers devices, etc and then register the regulator device from board.c in the standard Linux way. e.g. regulator LDO2 (supplying codec and sim) platform data. /* regulator LDO2 consumer devices */ static struct regulator_consumer_supply ldo2_consumers[] = { { .dev = &platform_audio_device.dev, .supply = "codec_avdd", }, { .dev = &platform_sim_device.dev, .supply = "sim_vcc", } }; /* regulator LDO2 constraints */ static struct regulator_init_data ldo2_data = { .constraints = { .min_uV = 3300000, .max_uV = 3300000, .valid_modes_mask = REGULATOR_MODE_NORMAL, .apply_uV = 1, }, .num_consumer_supplies = ARRAY_SIZE(ldo2_consumers), .consumer_supplies = ldo2_consumers, }; /* machine regulator devices with thier consumers and constraints */ static struct platform_device wm8350_regulator_devices[] = { { .name = "wm8350-regulator", .id = WM8350_LDO_2, .dev = { .platform_data = &ldo2_data, }, }, }; Changes in detail:- o Removed all const char* regulator config functions in machine API. o Created new struct regulator_init_data to contain regulator machine configuration constraints and consmuers. o Changed set_supply(), set_machine_constraints(), set_consumer_device_supply() to remove their string identifier parameters. Also made them static and moved functions nearer top of core.c. o Removed no longer used inline func to_rdev() o Added regulator_get_init_drvdata() to retrieve init data. o Added struct device* as parameter to regulator_register(). o Changed my email address. Signed-off-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2008-10-10 12:22:20 +00:00
/* preform any regulator specific init */
if (init_data && init_data->regulator_init) {
regulator: core - Rework machine API to remove string based functions. This improves the machine level API in order to configure regulator constraints and consumers as platform data and removes the old string based API that required several calls to set up each regulator. The intention is to create a struct regulator_init_data, populate it's fields with constraints, consumers devices, etc and then register the regulator device from board.c in the standard Linux way. e.g. regulator LDO2 (supplying codec and sim) platform data. /* regulator LDO2 consumer devices */ static struct regulator_consumer_supply ldo2_consumers[] = { { .dev = &platform_audio_device.dev, .supply = "codec_avdd", }, { .dev = &platform_sim_device.dev, .supply = "sim_vcc", } }; /* regulator LDO2 constraints */ static struct regulator_init_data ldo2_data = { .constraints = { .min_uV = 3300000, .max_uV = 3300000, .valid_modes_mask = REGULATOR_MODE_NORMAL, .apply_uV = 1, }, .num_consumer_supplies = ARRAY_SIZE(ldo2_consumers), .consumer_supplies = ldo2_consumers, }; /* machine regulator devices with thier consumers and constraints */ static struct platform_device wm8350_regulator_devices[] = { { .name = "wm8350-regulator", .id = WM8350_LDO_2, .dev = { .platform_data = &ldo2_data, }, }, }; Changes in detail:- o Removed all const char* regulator config functions in machine API. o Created new struct regulator_init_data to contain regulator machine configuration constraints and consmuers. o Changed set_supply(), set_machine_constraints(), set_consumer_device_supply() to remove their string identifier parameters. Also made them static and moved functions nearer top of core.c. o Removed no longer used inline func to_rdev() o Added regulator_get_init_drvdata() to retrieve init data. o Added struct device* as parameter to regulator_register(). o Changed my email address. Signed-off-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2008-10-10 12:22:20 +00:00
ret = init_data->regulator_init(rdev->reg_data);
if (ret < 0)
goto clean;
regulator: core - Rework machine API to remove string based functions. This improves the machine level API in order to configure regulator constraints and consumers as platform data and removes the old string based API that required several calls to set up each regulator. The intention is to create a struct regulator_init_data, populate it's fields with constraints, consumers devices, etc and then register the regulator device from board.c in the standard Linux way. e.g. regulator LDO2 (supplying codec and sim) platform data. /* regulator LDO2 consumer devices */ static struct regulator_consumer_supply ldo2_consumers[] = { { .dev = &platform_audio_device.dev, .supply = "codec_avdd", }, { .dev = &platform_sim_device.dev, .supply = "sim_vcc", } }; /* regulator LDO2 constraints */ static struct regulator_init_data ldo2_data = { .constraints = { .min_uV = 3300000, .max_uV = 3300000, .valid_modes_mask = REGULATOR_MODE_NORMAL, .apply_uV = 1, }, .num_consumer_supplies = ARRAY_SIZE(ldo2_consumers), .consumer_supplies = ldo2_consumers, }; /* machine regulator devices with thier consumers and constraints */ static struct platform_device wm8350_regulator_devices[] = { { .name = "wm8350-regulator", .id = WM8350_LDO_2, .dev = { .platform_data = &ldo2_data, }, }, }; Changes in detail:- o Removed all const char* regulator config functions in machine API. o Created new struct regulator_init_data to contain regulator machine configuration constraints and consmuers. o Changed set_supply(), set_machine_constraints(), set_consumer_device_supply() to remove their string identifier parameters. Also made them static and moved functions nearer top of core.c. o Removed no longer used inline func to_rdev() o Added regulator_get_init_drvdata() to retrieve init data. o Added struct device* as parameter to regulator_register(). o Changed my email address. Signed-off-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2008-10-10 12:22:20 +00:00
}
if ((config->ena_gpio || config->ena_gpio_initialized) &&
gpio_is_valid(config->ena_gpio)) {
regulator: core: Add early supply resolution for regulators The call to set_machine_constraints() in regulator_register(), will attempt to get the voltage for the regulator. If a regulator is in bypass will fail to get the voltage (ie. it's bypass voltage) and hence register the regulator, because the supply for the regulator has not been resolved yet. To fix this, add a call to regulator_resolve_supply() before we call set_machine_constraints(). If the call to regulator_resolve_supply() fails, rather than returning an error at this point, allow the registration of the regulator to continue because for some regulators resolving the supply at this point may not be necessary and it will be resolved later as more regulators are added. Furthermore, if the supply is still not resolved for a bypassed regulator, this will be detected when we attempt to get the voltage for the regulator and an error will be propagated at this point. If a bypassed regulator does not have a supply when we attempt to get the voltage, rather than returing -EINVAL, return -EPROBE_DEFER instead to allow the registration of the regulator to be deferred and tried again later. Please note that regulator_resolve_supply() will call regulator_dev_lookup() which may acquire the regulator_list_mutex. To avoid any deadlocks we cannot hold the regulator_list_mutex when calling regulator_resolve_supply(). Therefore, rather than holding the lock around a large portion of the registration code, just hold the lock when aquiring any GPIOs and setting up supplies because these sections may add entries to the regulator_map_list and regulator_ena_gpio_list, respectively. Signed-off-by: Jon Hunter <jonathanh@nvidia.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2016-04-26 10:29:45 +00:00
mutex_lock(&regulator_list_mutex);
ret = regulator_ena_gpio_request(rdev, config);
regulator: core: Add early supply resolution for regulators The call to set_machine_constraints() in regulator_register(), will attempt to get the voltage for the regulator. If a regulator is in bypass will fail to get the voltage (ie. it's bypass voltage) and hence register the regulator, because the supply for the regulator has not been resolved yet. To fix this, add a call to regulator_resolve_supply() before we call set_machine_constraints(). If the call to regulator_resolve_supply() fails, rather than returning an error at this point, allow the registration of the regulator to continue because for some regulators resolving the supply at this point may not be necessary and it will be resolved later as more regulators are added. Furthermore, if the supply is still not resolved for a bypassed regulator, this will be detected when we attempt to get the voltage for the regulator and an error will be propagated at this point. If a bypassed regulator does not have a supply when we attempt to get the voltage, rather than returing -EINVAL, return -EPROBE_DEFER instead to allow the registration of the regulator to be deferred and tried again later. Please note that regulator_resolve_supply() will call regulator_dev_lookup() which may acquire the regulator_list_mutex. To avoid any deadlocks we cannot hold the regulator_list_mutex when calling regulator_resolve_supply(). Therefore, rather than holding the lock around a large portion of the registration code, just hold the lock when aquiring any GPIOs and setting up supplies because these sections may add entries to the regulator_map_list and regulator_ena_gpio_list, respectively. Signed-off-by: Jon Hunter <jonathanh@nvidia.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2016-04-26 10:29:45 +00:00
mutex_unlock(&regulator_list_mutex);
if (ret != 0) {
rdev_err(rdev, "Failed to request enable GPIO%d: %d\n",
config->ena_gpio, ret);
regulator: core: fix crash in error path of regulator_register This problem was introduced by: commit daad134d6649 ("regulator: core: Request GPIO before creating sysfs entries") The error path was not updated correctly after moving GPIO registration code and in case regulator_ena_gpio_free failed, device_unregister() was called even though device_register() was not yet called. This problem breaks the boot at least on all Tegra 32-bit devices. It will also crash each device that specifices GPIO that is unavaiable at regulator_register call. Here's error log I've got when forced GPIO to be invalid: [ 1.116612] usb-otg-vbus-reg: Failed to request enable GPIO10: -22 [ 1.122794] Unable to handle kernel NULL pointer dereference at virtual address 00000044 [ 1.130894] pgd = c0004000 [ 1.133598] [00000044] *pgd=00000000 [ 1.137205] Internal error: Oops: 5 [#1] SMP ARM and here's backtrace from KDB: Exception stack(0xef11fbd0 to 0xef11fc18) fbc0: 00000000 c0738a14 00000000 00000000 fbe0: c0b2a0b0 00000000 00000000 c0738a14 c0b5fdf8 00000001 ef7f6074 ef11fc4c fc00: ef11fc50 ef11fc20 c02a8344 c02a7f1c 60000013 ffffffff [<c010cee0>] (__dabt_svc) from [<c02a7f1c>] (kernfs_find_ns+0x18/0xf8) [<c02a7f1c>] (kernfs_find_ns) from [<c02a8344>] (kernfs_find_and_get_ns+0x40/0x58) [<c02a8344>] (kernfs_find_and_get_ns) from [<c02ac4a4>] (sysfs_unmerge_group+0x28/0x68) [<c02ac4a4>] (sysfs_unmerge_group) from [<c044389c>] (dpm_sysfs_remove+0x30/0x5c) [<c044389c>] (dpm_sysfs_remove) from [<c0436ba8>] (device_del+0x48/0x1f4) [<c0436ba8>] (device_del) from [<c0436d84>] (device_unregister+0x30/0x6c) [<c0436d84>] (device_unregister) from [<c0403910>] (regulator_register+0x6d0/0xdac) [<c0403910>] (regulator_register) from [<c04052d4>] (devm_regulator_register+0x50/0x84) [<c04052d4>] (devm_regulator_register) from [<c0406298>] (reg_fixed_voltage_probe+0x25c/0x3c0) [<c0406298>] (reg_fixed_voltage_probe) from [<c043d21c>] (platform_drv_probe+0x60/0xb0) [<c043d21c>] (platform_drv_probe) from [<c043b078>] (driver_probe_device+0x24c/0x440) [<c043b078>] (driver_probe_device) from [<c043b5e8>] (__device_attach_driver+0xc0/0x120) [<c043b5e8>] (__device_attach_driver) from [<c043901c>] (bus_for_each_drv+0x6c/0x98) [<c043901c>] (bus_for_each_drv) from [<c043ad20>] (__device_attach+0xac/0x138) [<c043ad20>] (__device_attach) from [<c043b664>] (device_initial_probe+0x1c/0x20) [<c043b664>] (device_initial_probe) from [<c043a074>] (bus_probe_device+0x94/0x9c) [<c043a074>] (bus_probe_device) from [<c043a610>] (deferred_probe_work_func+0x80/0xcc) [<c043a610>] (deferred_probe_work_func) from [<c01381d0>] (process_one_work+0x158/0x454) [<c01381d0>] (process_one_work) from [<c013854c>] (worker_thread+0x38/0x510) [<c013854c>] (worker_thread) from [<c013e154>] (kthread+0xe8/0x104) [<c013e154>] (kthread) from [<c0108638>] (ret_from_fork+0x14/0x3c) Signed-off-by: Krzysztof Adamski <krzysztof.adamski@tieto.com> Reported-by: Jon Hunter <jonathanh@nvidia.com> Acked-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2016-02-24 10:52:50 +00:00
goto clean;
}
}
regulator: core - Rework machine API to remove string based functions. This improves the machine level API in order to configure regulator constraints and consumers as platform data and removes the old string based API that required several calls to set up each regulator. The intention is to create a struct regulator_init_data, populate it's fields with constraints, consumers devices, etc and then register the regulator device from board.c in the standard Linux way. e.g. regulator LDO2 (supplying codec and sim) platform data. /* regulator LDO2 consumer devices */ static struct regulator_consumer_supply ldo2_consumers[] = { { .dev = &platform_audio_device.dev, .supply = "codec_avdd", }, { .dev = &platform_sim_device.dev, .supply = "sim_vcc", } }; /* regulator LDO2 constraints */ static struct regulator_init_data ldo2_data = { .constraints = { .min_uV = 3300000, .max_uV = 3300000, .valid_modes_mask = REGULATOR_MODE_NORMAL, .apply_uV = 1, }, .num_consumer_supplies = ARRAY_SIZE(ldo2_consumers), .consumer_supplies = ldo2_consumers, }; /* machine regulator devices with thier consumers and constraints */ static struct platform_device wm8350_regulator_devices[] = { { .name = "wm8350-regulator", .id = WM8350_LDO_2, .dev = { .platform_data = &ldo2_data, }, }, }; Changes in detail:- o Removed all const char* regulator config functions in machine API. o Created new struct regulator_init_data to contain regulator machine configuration constraints and consmuers. o Changed set_supply(), set_machine_constraints(), set_consumer_device_supply() to remove their string identifier parameters. Also made them static and moved functions nearer top of core.c. o Removed no longer used inline func to_rdev() o Added regulator_get_init_drvdata() to retrieve init data. o Added struct device* as parameter to regulator_register(). o Changed my email address. Signed-off-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2008-10-10 12:22:20 +00:00
/* register with sysfs */
rdev->dev.class = &regulator_class;
regulator: core - Rework machine API to remove string based functions. This improves the machine level API in order to configure regulator constraints and consumers as platform data and removes the old string based API that required several calls to set up each regulator. The intention is to create a struct regulator_init_data, populate it's fields with constraints, consumers devices, etc and then register the regulator device from board.c in the standard Linux way. e.g. regulator LDO2 (supplying codec and sim) platform data. /* regulator LDO2 consumer devices */ static struct regulator_consumer_supply ldo2_consumers[] = { { .dev = &platform_audio_device.dev, .supply = "codec_avdd", }, { .dev = &platform_sim_device.dev, .supply = "sim_vcc", } }; /* regulator LDO2 constraints */ static struct regulator_init_data ldo2_data = { .constraints = { .min_uV = 3300000, .max_uV = 3300000, .valid_modes_mask = REGULATOR_MODE_NORMAL, .apply_uV = 1, }, .num_consumer_supplies = ARRAY_SIZE(ldo2_consumers), .consumer_supplies = ldo2_consumers, }; /* machine regulator devices with thier consumers and constraints */ static struct platform_device wm8350_regulator_devices[] = { { .name = "wm8350-regulator", .id = WM8350_LDO_2, .dev = { .platform_data = &ldo2_data, }, }, }; Changes in detail:- o Removed all const char* regulator config functions in machine API. o Created new struct regulator_init_data to contain regulator machine configuration constraints and consmuers. o Changed set_supply(), set_machine_constraints(), set_consumer_device_supply() to remove their string identifier parameters. Also made them static and moved functions nearer top of core.c. o Removed no longer used inline func to_rdev() o Added regulator_get_init_drvdata() to retrieve init data. o Added struct device* as parameter to regulator_register(). o Changed my email address. Signed-off-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2008-10-10 12:22:20 +00:00
rdev->dev.parent = dev;
dev_set_name(&rdev->dev, "regulator.%lu",
(unsigned long) atomic_inc_return(&regulator_no));
regulator: core - Rework machine API to remove string based functions. This improves the machine level API in order to configure regulator constraints and consumers as platform data and removes the old string based API that required several calls to set up each regulator. The intention is to create a struct regulator_init_data, populate it's fields with constraints, consumers devices, etc and then register the regulator device from board.c in the standard Linux way. e.g. regulator LDO2 (supplying codec and sim) platform data. /* regulator LDO2 consumer devices */ static struct regulator_consumer_supply ldo2_consumers[] = { { .dev = &platform_audio_device.dev, .supply = "codec_avdd", }, { .dev = &platform_sim_device.dev, .supply = "sim_vcc", } }; /* regulator LDO2 constraints */ static struct regulator_init_data ldo2_data = { .constraints = { .min_uV = 3300000, .max_uV = 3300000, .valid_modes_mask = REGULATOR_MODE_NORMAL, .apply_uV = 1, }, .num_consumer_supplies = ARRAY_SIZE(ldo2_consumers), .consumer_supplies = ldo2_consumers, }; /* machine regulator devices with thier consumers and constraints */ static struct platform_device wm8350_regulator_devices[] = { { .name = "wm8350-regulator", .id = WM8350_LDO_2, .dev = { .platform_data = &ldo2_data, }, }, }; Changes in detail:- o Removed all const char* regulator config functions in machine API. o Created new struct regulator_init_data to contain regulator machine configuration constraints and consmuers. o Changed set_supply(), set_machine_constraints(), set_consumer_device_supply() to remove their string identifier parameters. Also made them static and moved functions nearer top of core.c. o Removed no longer used inline func to_rdev() o Added regulator_get_init_drvdata() to retrieve init data. o Added struct device* as parameter to regulator_register(). o Changed my email address. Signed-off-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2008-10-10 12:22:20 +00:00
/* set regulator constraints */
if (init_data)
constraints = &init_data->constraints;
if (init_data && init_data->supply_regulator)
rdev->supply_name = init_data->supply_regulator;
else if (regulator_desc->supply_name)
rdev->supply_name = regulator_desc->supply_name;
regulator: core: Add early supply resolution for regulators The call to set_machine_constraints() in regulator_register(), will attempt to get the voltage for the regulator. If a regulator is in bypass will fail to get the voltage (ie. it's bypass voltage) and hence register the regulator, because the supply for the regulator has not been resolved yet. To fix this, add a call to regulator_resolve_supply() before we call set_machine_constraints(). If the call to regulator_resolve_supply() fails, rather than returning an error at this point, allow the registration of the regulator to continue because for some regulators resolving the supply at this point may not be necessary and it will be resolved later as more regulators are added. Furthermore, if the supply is still not resolved for a bypassed regulator, this will be detected when we attempt to get the voltage for the regulator and an error will be propagated at this point. If a bypassed regulator does not have a supply when we attempt to get the voltage, rather than returing -EINVAL, return -EPROBE_DEFER instead to allow the registration of the regulator to be deferred and tried again later. Please note that regulator_resolve_supply() will call regulator_dev_lookup() which may acquire the regulator_list_mutex. To avoid any deadlocks we cannot hold the regulator_list_mutex when calling regulator_resolve_supply(). Therefore, rather than holding the lock around a large portion of the registration code, just hold the lock when aquiring any GPIOs and setting up supplies because these sections may add entries to the regulator_map_list and regulator_ena_gpio_list, respectively. Signed-off-by: Jon Hunter <jonathanh@nvidia.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2016-04-26 10:29:45 +00:00
/*
* Attempt to resolve the regulator supply, if specified,
* but don't return an error if we fail because we will try
* to resolve it again later as more regulators are added.
*/
if (regulator_resolve_supply(rdev))
rdev_dbg(rdev, "unable to resolve supply\n");
ret = set_machine_constraints(rdev, constraints);
if (ret < 0)
goto wash;
regulator: core - Rework machine API to remove string based functions. This improves the machine level API in order to configure regulator constraints and consumers as platform data and removes the old string based API that required several calls to set up each regulator. The intention is to create a struct regulator_init_data, populate it's fields with constraints, consumers devices, etc and then register the regulator device from board.c in the standard Linux way. e.g. regulator LDO2 (supplying codec and sim) platform data. /* regulator LDO2 consumer devices */ static struct regulator_consumer_supply ldo2_consumers[] = { { .dev = &platform_audio_device.dev, .supply = "codec_avdd", }, { .dev = &platform_sim_device.dev, .supply = "sim_vcc", } }; /* regulator LDO2 constraints */ static struct regulator_init_data ldo2_data = { .constraints = { .min_uV = 3300000, .max_uV = 3300000, .valid_modes_mask = REGULATOR_MODE_NORMAL, .apply_uV = 1, }, .num_consumer_supplies = ARRAY_SIZE(ldo2_consumers), .consumer_supplies = ldo2_consumers, }; /* machine regulator devices with thier consumers and constraints */ static struct platform_device wm8350_regulator_devices[] = { { .name = "wm8350-regulator", .id = WM8350_LDO_2, .dev = { .platform_data = &ldo2_data, }, }, }; Changes in detail:- o Removed all const char* regulator config functions in machine API. o Created new struct regulator_init_data to contain regulator machine configuration constraints and consmuers. o Changed set_supply(), set_machine_constraints(), set_consumer_device_supply() to remove their string identifier parameters. Also made them static and moved functions nearer top of core.c. o Removed no longer used inline func to_rdev() o Added regulator_get_init_drvdata() to retrieve init data. o Added struct device* as parameter to regulator_register(). o Changed my email address. Signed-off-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2008-10-10 12:22:20 +00:00
/* add consumers devices */
if (init_data) {
regulator: core: Add early supply resolution for regulators The call to set_machine_constraints() in regulator_register(), will attempt to get the voltage for the regulator. If a regulator is in bypass will fail to get the voltage (ie. it's bypass voltage) and hence register the regulator, because the supply for the regulator has not been resolved yet. To fix this, add a call to regulator_resolve_supply() before we call set_machine_constraints(). If the call to regulator_resolve_supply() fails, rather than returning an error at this point, allow the registration of the regulator to continue because for some regulators resolving the supply at this point may not be necessary and it will be resolved later as more regulators are added. Furthermore, if the supply is still not resolved for a bypassed regulator, this will be detected when we attempt to get the voltage for the regulator and an error will be propagated at this point. If a bypassed regulator does not have a supply when we attempt to get the voltage, rather than returing -EINVAL, return -EPROBE_DEFER instead to allow the registration of the regulator to be deferred and tried again later. Please note that regulator_resolve_supply() will call regulator_dev_lookup() which may acquire the regulator_list_mutex. To avoid any deadlocks we cannot hold the regulator_list_mutex when calling regulator_resolve_supply(). Therefore, rather than holding the lock around a large portion of the registration code, just hold the lock when aquiring any GPIOs and setting up supplies because these sections may add entries to the regulator_map_list and regulator_ena_gpio_list, respectively. Signed-off-by: Jon Hunter <jonathanh@nvidia.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2016-04-26 10:29:45 +00:00
mutex_lock(&regulator_list_mutex);
for (i = 0; i < init_data->num_consumer_supplies; i++) {
ret = set_consumer_device_supply(rdev,
init_data->consumer_supplies[i].dev_name,
init_data->consumer_supplies[i].supply);
if (ret < 0) {
regulator: core: Add early supply resolution for regulators The call to set_machine_constraints() in regulator_register(), will attempt to get the voltage for the regulator. If a regulator is in bypass will fail to get the voltage (ie. it's bypass voltage) and hence register the regulator, because the supply for the regulator has not been resolved yet. To fix this, add a call to regulator_resolve_supply() before we call set_machine_constraints(). If the call to regulator_resolve_supply() fails, rather than returning an error at this point, allow the registration of the regulator to continue because for some regulators resolving the supply at this point may not be necessary and it will be resolved later as more regulators are added. Furthermore, if the supply is still not resolved for a bypassed regulator, this will be detected when we attempt to get the voltage for the regulator and an error will be propagated at this point. If a bypassed regulator does not have a supply when we attempt to get the voltage, rather than returing -EINVAL, return -EPROBE_DEFER instead to allow the registration of the regulator to be deferred and tried again later. Please note that regulator_resolve_supply() will call regulator_dev_lookup() which may acquire the regulator_list_mutex. To avoid any deadlocks we cannot hold the regulator_list_mutex when calling regulator_resolve_supply(). Therefore, rather than holding the lock around a large portion of the registration code, just hold the lock when aquiring any GPIOs and setting up supplies because these sections may add entries to the regulator_map_list and regulator_ena_gpio_list, respectively. Signed-off-by: Jon Hunter <jonathanh@nvidia.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2016-04-26 10:29:45 +00:00
mutex_unlock(&regulator_list_mutex);
dev_err(dev, "Failed to set supply %s\n",
init_data->consumer_supplies[i].supply);
goto unset_supplies;
}
}
regulator: core: Add early supply resolution for regulators The call to set_machine_constraints() in regulator_register(), will attempt to get the voltage for the regulator. If a regulator is in bypass will fail to get the voltage (ie. it's bypass voltage) and hence register the regulator, because the supply for the regulator has not been resolved yet. To fix this, add a call to regulator_resolve_supply() before we call set_machine_constraints(). If the call to regulator_resolve_supply() fails, rather than returning an error at this point, allow the registration of the regulator to continue because for some regulators resolving the supply at this point may not be necessary and it will be resolved later as more regulators are added. Furthermore, if the supply is still not resolved for a bypassed regulator, this will be detected when we attempt to get the voltage for the regulator and an error will be propagated at this point. If a bypassed regulator does not have a supply when we attempt to get the voltage, rather than returing -EINVAL, return -EPROBE_DEFER instead to allow the registration of the regulator to be deferred and tried again later. Please note that regulator_resolve_supply() will call regulator_dev_lookup() which may acquire the regulator_list_mutex. To avoid any deadlocks we cannot hold the regulator_list_mutex when calling regulator_resolve_supply(). Therefore, rather than holding the lock around a large portion of the registration code, just hold the lock when aquiring any GPIOs and setting up supplies because these sections may add entries to the regulator_map_list and regulator_ena_gpio_list, respectively. Signed-off-by: Jon Hunter <jonathanh@nvidia.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2016-04-26 10:29:45 +00:00
mutex_unlock(&regulator_list_mutex);
}
regulator: core - Rework machine API to remove string based functions. This improves the machine level API in order to configure regulator constraints and consumers as platform data and removes the old string based API that required several calls to set up each regulator. The intention is to create a struct regulator_init_data, populate it's fields with constraints, consumers devices, etc and then register the regulator device from board.c in the standard Linux way. e.g. regulator LDO2 (supplying codec and sim) platform data. /* regulator LDO2 consumer devices */ static struct regulator_consumer_supply ldo2_consumers[] = { { .dev = &platform_audio_device.dev, .supply = "codec_avdd", }, { .dev = &platform_sim_device.dev, .supply = "sim_vcc", } }; /* regulator LDO2 constraints */ static struct regulator_init_data ldo2_data = { .constraints = { .min_uV = 3300000, .max_uV = 3300000, .valid_modes_mask = REGULATOR_MODE_NORMAL, .apply_uV = 1, }, .num_consumer_supplies = ARRAY_SIZE(ldo2_consumers), .consumer_supplies = ldo2_consumers, }; /* machine regulator devices with thier consumers and constraints */ static struct platform_device wm8350_regulator_devices[] = { { .name = "wm8350-regulator", .id = WM8350_LDO_2, .dev = { .platform_data = &ldo2_data, }, }, }; Changes in detail:- o Removed all const char* regulator config functions in machine API. o Created new struct regulator_init_data to contain regulator machine configuration constraints and consmuers. o Changed set_supply(), set_machine_constraints(), set_consumer_device_supply() to remove their string identifier parameters. Also made them static and moved functions nearer top of core.c. o Removed no longer used inline func to_rdev() o Added regulator_get_init_drvdata() to retrieve init data. o Added struct device* as parameter to regulator_register(). o Changed my email address. Signed-off-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2008-10-10 12:22:20 +00:00
ret = device_register(&rdev->dev);
if (ret != 0) {
put_device(&rdev->dev);
goto unset_supplies;
}
dev_set_drvdata(&rdev->dev, rdev);
rdev_init_debugfs(rdev);
2016-03-23 23:59:34 +00:00
/* try to resolve regulators supply since a new one was registered */
class_for_each_device(&regulator_class, NULL, NULL,
regulator_register_resolve_supply);
kfree(config);
return rdev;
unset_supplies:
regulator: core: Add early supply resolution for regulators The call to set_machine_constraints() in regulator_register(), will attempt to get the voltage for the regulator. If a regulator is in bypass will fail to get the voltage (ie. it's bypass voltage) and hence register the regulator, because the supply for the regulator has not been resolved yet. To fix this, add a call to regulator_resolve_supply() before we call set_machine_constraints(). If the call to regulator_resolve_supply() fails, rather than returning an error at this point, allow the registration of the regulator to continue because for some regulators resolving the supply at this point may not be necessary and it will be resolved later as more regulators are added. Furthermore, if the supply is still not resolved for a bypassed regulator, this will be detected when we attempt to get the voltage for the regulator and an error will be propagated at this point. If a bypassed regulator does not have a supply when we attempt to get the voltage, rather than returing -EINVAL, return -EPROBE_DEFER instead to allow the registration of the regulator to be deferred and tried again later. Please note that regulator_resolve_supply() will call regulator_dev_lookup() which may acquire the regulator_list_mutex. To avoid any deadlocks we cannot hold the regulator_list_mutex when calling regulator_resolve_supply(). Therefore, rather than holding the lock around a large portion of the registration code, just hold the lock when aquiring any GPIOs and setting up supplies because these sections may add entries to the regulator_map_list and regulator_ena_gpio_list, respectively. Signed-off-by: Jon Hunter <jonathanh@nvidia.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2016-04-26 10:29:45 +00:00
mutex_lock(&regulator_list_mutex);
unset_regulator_supplies(rdev);
regulator: core: Add early supply resolution for regulators The call to set_machine_constraints() in regulator_register(), will attempt to get the voltage for the regulator. If a regulator is in bypass will fail to get the voltage (ie. it's bypass voltage) and hence register the regulator, because the supply for the regulator has not been resolved yet. To fix this, add a call to regulator_resolve_supply() before we call set_machine_constraints(). If the call to regulator_resolve_supply() fails, rather than returning an error at this point, allow the registration of the regulator to continue because for some regulators resolving the supply at this point may not be necessary and it will be resolved later as more regulators are added. Furthermore, if the supply is still not resolved for a bypassed regulator, this will be detected when we attempt to get the voltage for the regulator and an error will be propagated at this point. If a bypassed regulator does not have a supply when we attempt to get the voltage, rather than returing -EINVAL, return -EPROBE_DEFER instead to allow the registration of the regulator to be deferred and tried again later. Please note that regulator_resolve_supply() will call regulator_dev_lookup() which may acquire the regulator_list_mutex. To avoid any deadlocks we cannot hold the regulator_list_mutex when calling regulator_resolve_supply(). Therefore, rather than holding the lock around a large portion of the registration code, just hold the lock when aquiring any GPIOs and setting up supplies because these sections may add entries to the regulator_map_list and regulator_ena_gpio_list, respectively. Signed-off-by: Jon Hunter <jonathanh@nvidia.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2016-04-26 10:29:45 +00:00
mutex_unlock(&regulator_list_mutex);
regulator: core: fix crash in error path of regulator_register This problem was introduced by: commit daad134d6649 ("regulator: core: Request GPIO before creating sysfs entries") The error path was not updated correctly after moving GPIO registration code and in case regulator_ena_gpio_free failed, device_unregister() was called even though device_register() was not yet called. This problem breaks the boot at least on all Tegra 32-bit devices. It will also crash each device that specifices GPIO that is unavaiable at regulator_register call. Here's error log I've got when forced GPIO to be invalid: [ 1.116612] usb-otg-vbus-reg: Failed to request enable GPIO10: -22 [ 1.122794] Unable to handle kernel NULL pointer dereference at virtual address 00000044 [ 1.130894] pgd = c0004000 [ 1.133598] [00000044] *pgd=00000000 [ 1.137205] Internal error: Oops: 5 [#1] SMP ARM and here's backtrace from KDB: Exception stack(0xef11fbd0 to 0xef11fc18) fbc0: 00000000 c0738a14 00000000 00000000 fbe0: c0b2a0b0 00000000 00000000 c0738a14 c0b5fdf8 00000001 ef7f6074 ef11fc4c fc00: ef11fc50 ef11fc20 c02a8344 c02a7f1c 60000013 ffffffff [<c010cee0>] (__dabt_svc) from [<c02a7f1c>] (kernfs_find_ns+0x18/0xf8) [<c02a7f1c>] (kernfs_find_ns) from [<c02a8344>] (kernfs_find_and_get_ns+0x40/0x58) [<c02a8344>] (kernfs_find_and_get_ns) from [<c02ac4a4>] (sysfs_unmerge_group+0x28/0x68) [<c02ac4a4>] (sysfs_unmerge_group) from [<c044389c>] (dpm_sysfs_remove+0x30/0x5c) [<c044389c>] (dpm_sysfs_remove) from [<c0436ba8>] (device_del+0x48/0x1f4) [<c0436ba8>] (device_del) from [<c0436d84>] (device_unregister+0x30/0x6c) [<c0436d84>] (device_unregister) from [<c0403910>] (regulator_register+0x6d0/0xdac) [<c0403910>] (regulator_register) from [<c04052d4>] (devm_regulator_register+0x50/0x84) [<c04052d4>] (devm_regulator_register) from [<c0406298>] (reg_fixed_voltage_probe+0x25c/0x3c0) [<c0406298>] (reg_fixed_voltage_probe) from [<c043d21c>] (platform_drv_probe+0x60/0xb0) [<c043d21c>] (platform_drv_probe) from [<c043b078>] (driver_probe_device+0x24c/0x440) [<c043b078>] (driver_probe_device) from [<c043b5e8>] (__device_attach_driver+0xc0/0x120) [<c043b5e8>] (__device_attach_driver) from [<c043901c>] (bus_for_each_drv+0x6c/0x98) [<c043901c>] (bus_for_each_drv) from [<c043ad20>] (__device_attach+0xac/0x138) [<c043ad20>] (__device_attach) from [<c043b664>] (device_initial_probe+0x1c/0x20) [<c043b664>] (device_initial_probe) from [<c043a074>] (bus_probe_device+0x94/0x9c) [<c043a074>] (bus_probe_device) from [<c043a610>] (deferred_probe_work_func+0x80/0xcc) [<c043a610>] (deferred_probe_work_func) from [<c01381d0>] (process_one_work+0x158/0x454) [<c01381d0>] (process_one_work) from [<c013854c>] (worker_thread+0x38/0x510) [<c013854c>] (worker_thread) from [<c013e154>] (kthread+0xe8/0x104) [<c013e154>] (kthread) from [<c0108638>] (ret_from_fork+0x14/0x3c) Signed-off-by: Krzysztof Adamski <krzysztof.adamski@tieto.com> Reported-by: Jon Hunter <jonathanh@nvidia.com> Acked-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2016-02-24 10:52:50 +00:00
wash:
kfree(rdev->constraints);
regulator: core: Add early supply resolution for regulators The call to set_machine_constraints() in regulator_register(), will attempt to get the voltage for the regulator. If a regulator is in bypass will fail to get the voltage (ie. it's bypass voltage) and hence register the regulator, because the supply for the regulator has not been resolved yet. To fix this, add a call to regulator_resolve_supply() before we call set_machine_constraints(). If the call to regulator_resolve_supply() fails, rather than returning an error at this point, allow the registration of the regulator to continue because for some regulators resolving the supply at this point may not be necessary and it will be resolved later as more regulators are added. Furthermore, if the supply is still not resolved for a bypassed regulator, this will be detected when we attempt to get the voltage for the regulator and an error will be propagated at this point. If a bypassed regulator does not have a supply when we attempt to get the voltage, rather than returing -EINVAL, return -EPROBE_DEFER instead to allow the registration of the regulator to be deferred and tried again later. Please note that regulator_resolve_supply() will call regulator_dev_lookup() which may acquire the regulator_list_mutex. To avoid any deadlocks we cannot hold the regulator_list_mutex when calling regulator_resolve_supply(). Therefore, rather than holding the lock around a large portion of the registration code, just hold the lock when aquiring any GPIOs and setting up supplies because these sections may add entries to the regulator_map_list and regulator_ena_gpio_list, respectively. Signed-off-by: Jon Hunter <jonathanh@nvidia.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2016-04-26 10:29:45 +00:00
mutex_lock(&regulator_list_mutex);
regulator: core: fix crash in error path of regulator_register This problem was introduced by: commit daad134d6649 ("regulator: core: Request GPIO before creating sysfs entries") The error path was not updated correctly after moving GPIO registration code and in case regulator_ena_gpio_free failed, device_unregister() was called even though device_register() was not yet called. This problem breaks the boot at least on all Tegra 32-bit devices. It will also crash each device that specifices GPIO that is unavaiable at regulator_register call. Here's error log I've got when forced GPIO to be invalid: [ 1.116612] usb-otg-vbus-reg: Failed to request enable GPIO10: -22 [ 1.122794] Unable to handle kernel NULL pointer dereference at virtual address 00000044 [ 1.130894] pgd = c0004000 [ 1.133598] [00000044] *pgd=00000000 [ 1.137205] Internal error: Oops: 5 [#1] SMP ARM and here's backtrace from KDB: Exception stack(0xef11fbd0 to 0xef11fc18) fbc0: 00000000 c0738a14 00000000 00000000 fbe0: c0b2a0b0 00000000 00000000 c0738a14 c0b5fdf8 00000001 ef7f6074 ef11fc4c fc00: ef11fc50 ef11fc20 c02a8344 c02a7f1c 60000013 ffffffff [<c010cee0>] (__dabt_svc) from [<c02a7f1c>] (kernfs_find_ns+0x18/0xf8) [<c02a7f1c>] (kernfs_find_ns) from [<c02a8344>] (kernfs_find_and_get_ns+0x40/0x58) [<c02a8344>] (kernfs_find_and_get_ns) from [<c02ac4a4>] (sysfs_unmerge_group+0x28/0x68) [<c02ac4a4>] (sysfs_unmerge_group) from [<c044389c>] (dpm_sysfs_remove+0x30/0x5c) [<c044389c>] (dpm_sysfs_remove) from [<c0436ba8>] (device_del+0x48/0x1f4) [<c0436ba8>] (device_del) from [<c0436d84>] (device_unregister+0x30/0x6c) [<c0436d84>] (device_unregister) from [<c0403910>] (regulator_register+0x6d0/0xdac) [<c0403910>] (regulator_register) from [<c04052d4>] (devm_regulator_register+0x50/0x84) [<c04052d4>] (devm_regulator_register) from [<c0406298>] (reg_fixed_voltage_probe+0x25c/0x3c0) [<c0406298>] (reg_fixed_voltage_probe) from [<c043d21c>] (platform_drv_probe+0x60/0xb0) [<c043d21c>] (platform_drv_probe) from [<c043b078>] (driver_probe_device+0x24c/0x440) [<c043b078>] (driver_probe_device) from [<c043b5e8>] (__device_attach_driver+0xc0/0x120) [<c043b5e8>] (__device_attach_driver) from [<c043901c>] (bus_for_each_drv+0x6c/0x98) [<c043901c>] (bus_for_each_drv) from [<c043ad20>] (__device_attach+0xac/0x138) [<c043ad20>] (__device_attach) from [<c043b664>] (device_initial_probe+0x1c/0x20) [<c043b664>] (device_initial_probe) from [<c043a074>] (bus_probe_device+0x94/0x9c) [<c043a074>] (bus_probe_device) from [<c043a610>] (deferred_probe_work_func+0x80/0xcc) [<c043a610>] (deferred_probe_work_func) from [<c01381d0>] (process_one_work+0x158/0x454) [<c01381d0>] (process_one_work) from [<c013854c>] (worker_thread+0x38/0x510) [<c013854c>] (worker_thread) from [<c013e154>] (kthread+0xe8/0x104) [<c013e154>] (kthread) from [<c0108638>] (ret_from_fork+0x14/0x3c) Signed-off-by: Krzysztof Adamski <krzysztof.adamski@tieto.com> Reported-by: Jon Hunter <jonathanh@nvidia.com> Acked-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2016-02-24 10:52:50 +00:00
regulator_ena_gpio_free(rdev);
regulator: core: Add early supply resolution for regulators The call to set_machine_constraints() in regulator_register(), will attempt to get the voltage for the regulator. If a regulator is in bypass will fail to get the voltage (ie. it's bypass voltage) and hence register the regulator, because the supply for the regulator has not been resolved yet. To fix this, add a call to regulator_resolve_supply() before we call set_machine_constraints(). If the call to regulator_resolve_supply() fails, rather than returning an error at this point, allow the registration of the regulator to continue because for some regulators resolving the supply at this point may not be necessary and it will be resolved later as more regulators are added. Furthermore, if the supply is still not resolved for a bypassed regulator, this will be detected when we attempt to get the voltage for the regulator and an error will be propagated at this point. If a bypassed regulator does not have a supply when we attempt to get the voltage, rather than returing -EINVAL, return -EPROBE_DEFER instead to allow the registration of the regulator to be deferred and tried again later. Please note that regulator_resolve_supply() will call regulator_dev_lookup() which may acquire the regulator_list_mutex. To avoid any deadlocks we cannot hold the regulator_list_mutex when calling regulator_resolve_supply(). Therefore, rather than holding the lock around a large portion of the registration code, just hold the lock when aquiring any GPIOs and setting up supplies because these sections may add entries to the regulator_map_list and regulator_ena_gpio_list, respectively. Signed-off-by: Jon Hunter <jonathanh@nvidia.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2016-04-26 10:29:45 +00:00
mutex_unlock(&regulator_list_mutex);
clean:
kfree(rdev);
kfree(config);
return ERR_PTR(ret);
}
EXPORT_SYMBOL_GPL(regulator_register);
/**
* regulator_unregister - unregister regulator
* @rdev: regulator to unregister
*
* Called by regulator drivers to unregister a regulator.
*/
void regulator_unregister(struct regulator_dev *rdev)
{
if (rdev == NULL)
return;
if (rdev->supply) {
while (rdev->use_count--)
regulator_disable(rdev->supply);
regulator_put(rdev->supply);
}
mutex_lock(&regulator_list_mutex);
debugfs_remove_recursive(rdev->debugfs);
workqueue: deprecate flush[_delayed]_work_sync() flush[_delayed]_work_sync() are now spurious. Mark them deprecated and convert all users to flush[_delayed]_work(). If you're cc'd and wondering what's going on: Now all workqueues are non-reentrant and the regular flushes guarantee that the work item is not pending or running on any CPU on return, so there's no reason to use the sync flushes at all and they're going away. This patch doesn't make any functional difference. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Russell King <linux@arm.linux.org.uk> Cc: Paul Mundt <lethal@linux-sh.org> Cc: Ian Campbell <ian.campbell@citrix.com> Cc: Jens Axboe <axboe@kernel.dk> Cc: Mattia Dongili <malattia@linux.it> Cc: Kent Yoder <key@linux.vnet.ibm.com> Cc: David Airlie <airlied@linux.ie> Cc: Jiri Kosina <jkosina@suse.cz> Cc: Karsten Keil <isdn@linux-pingi.de> Cc: Bryan Wu <bryan.wu@canonical.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Alasdair Kergon <agk@redhat.com> Cc: Mauro Carvalho Chehab <mchehab@infradead.org> Cc: Florian Tobias Schandinat <FlorianSchandinat@gmx.de> Cc: David Woodhouse <dwmw2@infradead.org> Cc: "David S. Miller" <davem@davemloft.net> Cc: linux-wireless@vger.kernel.org Cc: Anton Vorontsov <cbou@mail.ru> Cc: Sangbeom Kim <sbkim73@samsung.com> Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Eric Van Hensbergen <ericvh@gmail.com> Cc: Takashi Iwai <tiwai@suse.de> Cc: Steven Whitehouse <swhiteho@redhat.com> Cc: Petr Vandrovec <petr@vandrovec.name> Cc: Mark Fasheh <mfasheh@suse.com> Cc: Christoph Hellwig <hch@infradead.org> Cc: Avi Kivity <avi@redhat.com>
2012-08-20 21:51:24 +00:00
flush_work(&rdev->disable_work.work);
WARN_ON(rdev->open_count);
unset_regulator_supplies(rdev);
list_del(&rdev->list);
2013-02-18 06:50:39 +00:00
regulator_ena_gpio_free(rdev);
mutex_unlock(&regulator_list_mutex);
device_unregister(&rdev->dev);
}
EXPORT_SYMBOL_GPL(regulator_unregister);
static int _regulator_suspend_prepare(struct device *dev, void *data)
{
struct regulator_dev *rdev = dev_to_rdev(dev);
const suspend_state_t *state = data;
int ret;
mutex_lock(&rdev->mutex);
ret = suspend_prepare(rdev, *state);
mutex_unlock(&rdev->mutex);
return ret;
}
/**
* regulator_suspend_prepare - prepare regulators for system wide suspend
* @state: system suspend state
*
* Configure each regulator with it's suspend operating parameters for state.
* This will usually be called by machine suspend code prior to supending.
*/
int regulator_suspend_prepare(suspend_state_t state)
{
/* ON is handled by regulator active state */
if (state == PM_SUSPEND_ON)
return -EINVAL;
return class_for_each_device(&regulator_class, NULL, &state,
_regulator_suspend_prepare);
}
EXPORT_SYMBOL_GPL(regulator_suspend_prepare);
static int _regulator_suspend_finish(struct device *dev, void *data)
{
struct regulator_dev *rdev = dev_to_rdev(dev);
int ret;
mutex_lock(&rdev->mutex);
if (rdev->use_count > 0 || rdev->constraints->always_on) {
if (!_regulator_is_enabled(rdev)) {
ret = _regulator_do_enable(rdev);
if (ret)
dev_err(dev,
"Failed to resume regulator %d\n",
ret);
}
} else {
if (!have_full_constraints())
goto unlock;
if (!_regulator_is_enabled(rdev))
goto unlock;
ret = _regulator_do_disable(rdev);
if (ret)
dev_err(dev, "Failed to suspend regulator %d\n", ret);
}
unlock:
mutex_unlock(&rdev->mutex);
/* Keep processing regulators in spite of any errors */
return 0;
}
/**
* regulator_suspend_finish - resume regulators from system wide suspend
*
* Turn on regulators that might be turned off by regulator_suspend_prepare
* and that should be turned on according to the regulators properties.
*/
int regulator_suspend_finish(void)
{
return class_for_each_device(&regulator_class, NULL, NULL,
_regulator_suspend_finish);
}
EXPORT_SYMBOL_GPL(regulator_suspend_finish);
/**
* regulator_has_full_constraints - the system has fully specified constraints
*
* Calling this function will cause the regulator API to disable all
* regulators which have a zero use count and don't have an always_on
* constraint in a late_initcall.
*
* The intention is that this will become the default behaviour in a
* future kernel release so users are encouraged to use this facility
* now.
*/
void regulator_has_full_constraints(void)
{
has_full_constraints = 1;
}
EXPORT_SYMBOL_GPL(regulator_has_full_constraints);
/**
* rdev_get_drvdata - get rdev regulator driver data
* @rdev: regulator
*
* Get rdev regulator driver private data. This call can be used in the
* regulator driver context.
*/
void *rdev_get_drvdata(struct regulator_dev *rdev)
{
return rdev->reg_data;
}
EXPORT_SYMBOL_GPL(rdev_get_drvdata);
/**
* regulator_get_drvdata - get regulator driver data
* @regulator: regulator
*
* Get regulator driver private data. This call can be used in the consumer
* driver context when non API regulator specific functions need to be called.
*/
void *regulator_get_drvdata(struct regulator *regulator)
{
return regulator->rdev->reg_data;
}
EXPORT_SYMBOL_GPL(regulator_get_drvdata);
/**
* regulator_set_drvdata - set regulator driver data
* @regulator: regulator
* @data: data
*/
void regulator_set_drvdata(struct regulator *regulator, void *data)
{
regulator->rdev->reg_data = data;
}
EXPORT_SYMBOL_GPL(regulator_set_drvdata);
/**
* regulator_get_id - get regulator ID
* @rdev: regulator
*/
int rdev_get_id(struct regulator_dev *rdev)
{
return rdev->desc->id;
}
EXPORT_SYMBOL_GPL(rdev_get_id);
regulator: core - Rework machine API to remove string based functions. This improves the machine level API in order to configure regulator constraints and consumers as platform data and removes the old string based API that required several calls to set up each regulator. The intention is to create a struct regulator_init_data, populate it's fields with constraints, consumers devices, etc and then register the regulator device from board.c in the standard Linux way. e.g. regulator LDO2 (supplying codec and sim) platform data. /* regulator LDO2 consumer devices */ static struct regulator_consumer_supply ldo2_consumers[] = { { .dev = &platform_audio_device.dev, .supply = "codec_avdd", }, { .dev = &platform_sim_device.dev, .supply = "sim_vcc", } }; /* regulator LDO2 constraints */ static struct regulator_init_data ldo2_data = { .constraints = { .min_uV = 3300000, .max_uV = 3300000, .valid_modes_mask = REGULATOR_MODE_NORMAL, .apply_uV = 1, }, .num_consumer_supplies = ARRAY_SIZE(ldo2_consumers), .consumer_supplies = ldo2_consumers, }; /* machine regulator devices with thier consumers and constraints */ static struct platform_device wm8350_regulator_devices[] = { { .name = "wm8350-regulator", .id = WM8350_LDO_2, .dev = { .platform_data = &ldo2_data, }, }, }; Changes in detail:- o Removed all const char* regulator config functions in machine API. o Created new struct regulator_init_data to contain regulator machine configuration constraints and consmuers. o Changed set_supply(), set_machine_constraints(), set_consumer_device_supply() to remove their string identifier parameters. Also made them static and moved functions nearer top of core.c. o Removed no longer used inline func to_rdev() o Added regulator_get_init_drvdata() to retrieve init data. o Added struct device* as parameter to regulator_register(). o Changed my email address. Signed-off-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2008-10-10 12:22:20 +00:00
struct device *rdev_get_dev(struct regulator_dev *rdev)
{
return &rdev->dev;
}
EXPORT_SYMBOL_GPL(rdev_get_dev);
void *regulator_get_init_drvdata(struct regulator_init_data *reg_init_data)
{
return reg_init_data->driver_data;
}
EXPORT_SYMBOL_GPL(regulator_get_init_drvdata);
#ifdef CONFIG_DEBUG_FS
static ssize_t supply_map_read_file(struct file *file, char __user *user_buf,
size_t count, loff_t *ppos)
{
char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
ssize_t len, ret = 0;
struct regulator_map *map;
if (!buf)
return -ENOMEM;
list_for_each_entry(map, &regulator_map_list, list) {
len = snprintf(buf + ret, PAGE_SIZE - ret,
"%s -> %s.%s\n",
rdev_get_name(map->regulator), map->dev_name,
map->supply);
if (len >= 0)
ret += len;
if (ret > PAGE_SIZE) {
ret = PAGE_SIZE;
break;
}
}
ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
kfree(buf);
return ret;
}
#endif
static const struct file_operations supply_map_fops = {
#ifdef CONFIG_DEBUG_FS
.read = supply_map_read_file,
.llseek = default_llseek,
#endif
};
regulator: add a summary tree in debugfs On modern systems the regulator hierarchy can get quite long and nested with regulators supplying other regulators. In some cases when debugging it might be nice to get a tree of these regulators, their consumers and the regulation constraints in one go. To achieve this add a regulator_summary sysfs node, similar to clk_summary in the common clock framework, that walks the regulator list and creates a tree out of the regulators, their consumers and core per-regulator settings. On a rk3288-firefly the regulator_summary would for example look something like: regulator use open bypass value min max ----------------------------------------------------------------------- vcc_sys 0 12 0 5000mV 5000mV 5000mV vcc_lan 1 1 0 3300mV 3300mV 3300mV ff290000.ethernet 0mV 0mV vcca_33 0 0 0 3300mV 3300mV 3300mV vcca_18 0 0 0 1800mV 1800mV 1800mV vdd10_lcd 0 0 0 1000mV 1000mV 1000mV vccio_sd 0 0 0 3300mV 3300mV 3300mV vcc_20 0 3 0 2000mV 2000mV 2000mV vcc18_lcd 0 0 0 1800mV 1800mV 1800mV vcc_18 0 2 0 1800mV 1800mV 1800mV ff100000.saradc 0mV 0mV ff0d0000.dwmmc 1650mV 1950mV vdd_10 0 0 0 1000mV 1000mV 1000mV vdd_log 0 0 0 1100mV 1100mV 1100mV vcc_io 0 3 0 3300mV 3300mV 3300mV ff0f0000.dwmmc 3300mV 3400mV vcc_flash 1 1 0 1800mV 1800mV 1800mV ff0f0000.dwmmc 1700mV 1950mV vcc_sd 1 1 0 3300mV 3300mV 3300mV ff0c0000.dwmmc 3300mV 3400mV vcc_ddr 0 0 0 1200mV 1200mV 1200mV vdd_gpu 0 0 0 1000mV 850mV 1350mV vdd_cpu 0 1 0 900mV 850mV 1350mV cpu0 900mV 900mV vcc_5v 0 2 0 5000mV 5000mV 5000mV vcc_otg_5v 0 0 0 5000mV 5000mV 5000mV vcc_host_5v 0 0 0 5000mV 5000mV 5000mV regulator-dummy 0 0 0 0mV 0mV 0mV Signed-off-by: Heiko Stuebner <heiko@sntech.de> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-04-07 14:16:39 +00:00
#ifdef CONFIG_DEBUG_FS
struct summary_data {
struct seq_file *s;
struct regulator_dev *parent;
int level;
};
static void regulator_summary_show_subtree(struct seq_file *s,
struct regulator_dev *rdev,
int level);
static int regulator_summary_show_children(struct device *dev, void *data)
{
struct regulator_dev *rdev = dev_to_rdev(dev);
struct summary_data *summary_data = data;
if (rdev->supply && rdev->supply->rdev == summary_data->parent)
regulator_summary_show_subtree(summary_data->s, rdev,
summary_data->level + 1);
return 0;
}
regulator: add a summary tree in debugfs On modern systems the regulator hierarchy can get quite long and nested with regulators supplying other regulators. In some cases when debugging it might be nice to get a tree of these regulators, their consumers and the regulation constraints in one go. To achieve this add a regulator_summary sysfs node, similar to clk_summary in the common clock framework, that walks the regulator list and creates a tree out of the regulators, their consumers and core per-regulator settings. On a rk3288-firefly the regulator_summary would for example look something like: regulator use open bypass value min max ----------------------------------------------------------------------- vcc_sys 0 12 0 5000mV 5000mV 5000mV vcc_lan 1 1 0 3300mV 3300mV 3300mV ff290000.ethernet 0mV 0mV vcca_33 0 0 0 3300mV 3300mV 3300mV vcca_18 0 0 0 1800mV 1800mV 1800mV vdd10_lcd 0 0 0 1000mV 1000mV 1000mV vccio_sd 0 0 0 3300mV 3300mV 3300mV vcc_20 0 3 0 2000mV 2000mV 2000mV vcc18_lcd 0 0 0 1800mV 1800mV 1800mV vcc_18 0 2 0 1800mV 1800mV 1800mV ff100000.saradc 0mV 0mV ff0d0000.dwmmc 1650mV 1950mV vdd_10 0 0 0 1000mV 1000mV 1000mV vdd_log 0 0 0 1100mV 1100mV 1100mV vcc_io 0 3 0 3300mV 3300mV 3300mV ff0f0000.dwmmc 3300mV 3400mV vcc_flash 1 1 0 1800mV 1800mV 1800mV ff0f0000.dwmmc 1700mV 1950mV vcc_sd 1 1 0 3300mV 3300mV 3300mV ff0c0000.dwmmc 3300mV 3400mV vcc_ddr 0 0 0 1200mV 1200mV 1200mV vdd_gpu 0 0 0 1000mV 850mV 1350mV vdd_cpu 0 1 0 900mV 850mV 1350mV cpu0 900mV 900mV vcc_5v 0 2 0 5000mV 5000mV 5000mV vcc_otg_5v 0 0 0 5000mV 5000mV 5000mV vcc_host_5v 0 0 0 5000mV 5000mV 5000mV regulator-dummy 0 0 0 0mV 0mV 0mV Signed-off-by: Heiko Stuebner <heiko@sntech.de> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-04-07 14:16:39 +00:00
static void regulator_summary_show_subtree(struct seq_file *s,
struct regulator_dev *rdev,
int level)
{
struct regulation_constraints *c;
struct regulator *consumer;
struct summary_data summary_data;
regulator: add a summary tree in debugfs On modern systems the regulator hierarchy can get quite long and nested with regulators supplying other regulators. In some cases when debugging it might be nice to get a tree of these regulators, their consumers and the regulation constraints in one go. To achieve this add a regulator_summary sysfs node, similar to clk_summary in the common clock framework, that walks the regulator list and creates a tree out of the regulators, their consumers and core per-regulator settings. On a rk3288-firefly the regulator_summary would for example look something like: regulator use open bypass value min max ----------------------------------------------------------------------- vcc_sys 0 12 0 5000mV 5000mV 5000mV vcc_lan 1 1 0 3300mV 3300mV 3300mV ff290000.ethernet 0mV 0mV vcca_33 0 0 0 3300mV 3300mV 3300mV vcca_18 0 0 0 1800mV 1800mV 1800mV vdd10_lcd 0 0 0 1000mV 1000mV 1000mV vccio_sd 0 0 0 3300mV 3300mV 3300mV vcc_20 0 3 0 2000mV 2000mV 2000mV vcc18_lcd 0 0 0 1800mV 1800mV 1800mV vcc_18 0 2 0 1800mV 1800mV 1800mV ff100000.saradc 0mV 0mV ff0d0000.dwmmc 1650mV 1950mV vdd_10 0 0 0 1000mV 1000mV 1000mV vdd_log 0 0 0 1100mV 1100mV 1100mV vcc_io 0 3 0 3300mV 3300mV 3300mV ff0f0000.dwmmc 3300mV 3400mV vcc_flash 1 1 0 1800mV 1800mV 1800mV ff0f0000.dwmmc 1700mV 1950mV vcc_sd 1 1 0 3300mV 3300mV 3300mV ff0c0000.dwmmc 3300mV 3400mV vcc_ddr 0 0 0 1200mV 1200mV 1200mV vdd_gpu 0 0 0 1000mV 850mV 1350mV vdd_cpu 0 1 0 900mV 850mV 1350mV cpu0 900mV 900mV vcc_5v 0 2 0 5000mV 5000mV 5000mV vcc_otg_5v 0 0 0 5000mV 5000mV 5000mV vcc_host_5v 0 0 0 5000mV 5000mV 5000mV regulator-dummy 0 0 0 0mV 0mV 0mV Signed-off-by: Heiko Stuebner <heiko@sntech.de> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-04-07 14:16:39 +00:00
if (!rdev)
return;
seq_printf(s, "%*s%-*s %3d %4d %6d ",
level * 3 + 1, "",
30 - level * 3, rdev_get_name(rdev),
rdev->use_count, rdev->open_count, rdev->bypass_count);
seq_printf(s, "%5dmV ", _regulator_get_voltage(rdev) / 1000);
seq_printf(s, "%5dmA ", _regulator_get_current_limit(rdev) / 1000);
regulator: add a summary tree in debugfs On modern systems the regulator hierarchy can get quite long and nested with regulators supplying other regulators. In some cases when debugging it might be nice to get a tree of these regulators, their consumers and the regulation constraints in one go. To achieve this add a regulator_summary sysfs node, similar to clk_summary in the common clock framework, that walks the regulator list and creates a tree out of the regulators, their consumers and core per-regulator settings. On a rk3288-firefly the regulator_summary would for example look something like: regulator use open bypass value min max ----------------------------------------------------------------------- vcc_sys 0 12 0 5000mV 5000mV 5000mV vcc_lan 1 1 0 3300mV 3300mV 3300mV ff290000.ethernet 0mV 0mV vcca_33 0 0 0 3300mV 3300mV 3300mV vcca_18 0 0 0 1800mV 1800mV 1800mV vdd10_lcd 0 0 0 1000mV 1000mV 1000mV vccio_sd 0 0 0 3300mV 3300mV 3300mV vcc_20 0 3 0 2000mV 2000mV 2000mV vcc18_lcd 0 0 0 1800mV 1800mV 1800mV vcc_18 0 2 0 1800mV 1800mV 1800mV ff100000.saradc 0mV 0mV ff0d0000.dwmmc 1650mV 1950mV vdd_10 0 0 0 1000mV 1000mV 1000mV vdd_log 0 0 0 1100mV 1100mV 1100mV vcc_io 0 3 0 3300mV 3300mV 3300mV ff0f0000.dwmmc 3300mV 3400mV vcc_flash 1 1 0 1800mV 1800mV 1800mV ff0f0000.dwmmc 1700mV 1950mV vcc_sd 1 1 0 3300mV 3300mV 3300mV ff0c0000.dwmmc 3300mV 3400mV vcc_ddr 0 0 0 1200mV 1200mV 1200mV vdd_gpu 0 0 0 1000mV 850mV 1350mV vdd_cpu 0 1 0 900mV 850mV 1350mV cpu0 900mV 900mV vcc_5v 0 2 0 5000mV 5000mV 5000mV vcc_otg_5v 0 0 0 5000mV 5000mV 5000mV vcc_host_5v 0 0 0 5000mV 5000mV 5000mV regulator-dummy 0 0 0 0mV 0mV 0mV Signed-off-by: Heiko Stuebner <heiko@sntech.de> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-04-07 14:16:39 +00:00
c = rdev->constraints;
if (c) {
switch (rdev->desc->type) {
case REGULATOR_VOLTAGE:
seq_printf(s, "%5dmV %5dmV ",
c->min_uV / 1000, c->max_uV / 1000);
break;
case REGULATOR_CURRENT:
seq_printf(s, "%5dmA %5dmA ",
c->min_uA / 1000, c->max_uA / 1000);
break;
}
}
seq_puts(s, "\n");
list_for_each_entry(consumer, &rdev->consumer_list, list) {
if (consumer->dev->class == &regulator_class)
continue;
seq_printf(s, "%*s%-*s ",
(level + 1) * 3 + 1, "",
30 - (level + 1) * 3, dev_name(consumer->dev));
switch (rdev->desc->type) {
case REGULATOR_VOLTAGE:
seq_printf(s, "%37dmV %5dmV",
regulator: add a summary tree in debugfs On modern systems the regulator hierarchy can get quite long and nested with regulators supplying other regulators. In some cases when debugging it might be nice to get a tree of these regulators, their consumers and the regulation constraints in one go. To achieve this add a regulator_summary sysfs node, similar to clk_summary in the common clock framework, that walks the regulator list and creates a tree out of the regulators, their consumers and core per-regulator settings. On a rk3288-firefly the regulator_summary would for example look something like: regulator use open bypass value min max ----------------------------------------------------------------------- vcc_sys 0 12 0 5000mV 5000mV 5000mV vcc_lan 1 1 0 3300mV 3300mV 3300mV ff290000.ethernet 0mV 0mV vcca_33 0 0 0 3300mV 3300mV 3300mV vcca_18 0 0 0 1800mV 1800mV 1800mV vdd10_lcd 0 0 0 1000mV 1000mV 1000mV vccio_sd 0 0 0 3300mV 3300mV 3300mV vcc_20 0 3 0 2000mV 2000mV 2000mV vcc18_lcd 0 0 0 1800mV 1800mV 1800mV vcc_18 0 2 0 1800mV 1800mV 1800mV ff100000.saradc 0mV 0mV ff0d0000.dwmmc 1650mV 1950mV vdd_10 0 0 0 1000mV 1000mV 1000mV vdd_log 0 0 0 1100mV 1100mV 1100mV vcc_io 0 3 0 3300mV 3300mV 3300mV ff0f0000.dwmmc 3300mV 3400mV vcc_flash 1 1 0 1800mV 1800mV 1800mV ff0f0000.dwmmc 1700mV 1950mV vcc_sd 1 1 0 3300mV 3300mV 3300mV ff0c0000.dwmmc 3300mV 3400mV vcc_ddr 0 0 0 1200mV 1200mV 1200mV vdd_gpu 0 0 0 1000mV 850mV 1350mV vdd_cpu 0 1 0 900mV 850mV 1350mV cpu0 900mV 900mV vcc_5v 0 2 0 5000mV 5000mV 5000mV vcc_otg_5v 0 0 0 5000mV 5000mV 5000mV vcc_host_5v 0 0 0 5000mV 5000mV 5000mV regulator-dummy 0 0 0 0mV 0mV 0mV Signed-off-by: Heiko Stuebner <heiko@sntech.de> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-04-07 14:16:39 +00:00
consumer->min_uV / 1000,
consumer->max_uV / 1000);
break;
case REGULATOR_CURRENT:
break;
}
seq_puts(s, "\n");
}
summary_data.s = s;
summary_data.level = level;
summary_data.parent = rdev;
regulator: add a summary tree in debugfs On modern systems the regulator hierarchy can get quite long and nested with regulators supplying other regulators. In some cases when debugging it might be nice to get a tree of these regulators, their consumers and the regulation constraints in one go. To achieve this add a regulator_summary sysfs node, similar to clk_summary in the common clock framework, that walks the regulator list and creates a tree out of the regulators, their consumers and core per-regulator settings. On a rk3288-firefly the regulator_summary would for example look something like: regulator use open bypass value min max ----------------------------------------------------------------------- vcc_sys 0 12 0 5000mV 5000mV 5000mV vcc_lan 1 1 0 3300mV 3300mV 3300mV ff290000.ethernet 0mV 0mV vcca_33 0 0 0 3300mV 3300mV 3300mV vcca_18 0 0 0 1800mV 1800mV 1800mV vdd10_lcd 0 0 0 1000mV 1000mV 1000mV vccio_sd 0 0 0 3300mV 3300mV 3300mV vcc_20 0 3 0 2000mV 2000mV 2000mV vcc18_lcd 0 0 0 1800mV 1800mV 1800mV vcc_18 0 2 0 1800mV 1800mV 1800mV ff100000.saradc 0mV 0mV ff0d0000.dwmmc 1650mV 1950mV vdd_10 0 0 0 1000mV 1000mV 1000mV vdd_log 0 0 0 1100mV 1100mV 1100mV vcc_io 0 3 0 3300mV 3300mV 3300mV ff0f0000.dwmmc 3300mV 3400mV vcc_flash 1 1 0 1800mV 1800mV 1800mV ff0f0000.dwmmc 1700mV 1950mV vcc_sd 1 1 0 3300mV 3300mV 3300mV ff0c0000.dwmmc 3300mV 3400mV vcc_ddr 0 0 0 1200mV 1200mV 1200mV vdd_gpu 0 0 0 1000mV 850mV 1350mV vdd_cpu 0 1 0 900mV 850mV 1350mV cpu0 900mV 900mV vcc_5v 0 2 0 5000mV 5000mV 5000mV vcc_otg_5v 0 0 0 5000mV 5000mV 5000mV vcc_host_5v 0 0 0 5000mV 5000mV 5000mV regulator-dummy 0 0 0 0mV 0mV 0mV Signed-off-by: Heiko Stuebner <heiko@sntech.de> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-04-07 14:16:39 +00:00
class_for_each_device(&regulator_class, NULL, &summary_data,
regulator_summary_show_children);
regulator: add a summary tree in debugfs On modern systems the regulator hierarchy can get quite long and nested with regulators supplying other regulators. In some cases when debugging it might be nice to get a tree of these regulators, their consumers and the regulation constraints in one go. To achieve this add a regulator_summary sysfs node, similar to clk_summary in the common clock framework, that walks the regulator list and creates a tree out of the regulators, their consumers and core per-regulator settings. On a rk3288-firefly the regulator_summary would for example look something like: regulator use open bypass value min max ----------------------------------------------------------------------- vcc_sys 0 12 0 5000mV 5000mV 5000mV vcc_lan 1 1 0 3300mV 3300mV 3300mV ff290000.ethernet 0mV 0mV vcca_33 0 0 0 3300mV 3300mV 3300mV vcca_18 0 0 0 1800mV 1800mV 1800mV vdd10_lcd 0 0 0 1000mV 1000mV 1000mV vccio_sd 0 0 0 3300mV 3300mV 3300mV vcc_20 0 3 0 2000mV 2000mV 2000mV vcc18_lcd 0 0 0 1800mV 1800mV 1800mV vcc_18 0 2 0 1800mV 1800mV 1800mV ff100000.saradc 0mV 0mV ff0d0000.dwmmc 1650mV 1950mV vdd_10 0 0 0 1000mV 1000mV 1000mV vdd_log 0 0 0 1100mV 1100mV 1100mV vcc_io 0 3 0 3300mV 3300mV 3300mV ff0f0000.dwmmc 3300mV 3400mV vcc_flash 1 1 0 1800mV 1800mV 1800mV ff0f0000.dwmmc 1700mV 1950mV vcc_sd 1 1 0 3300mV 3300mV 3300mV ff0c0000.dwmmc 3300mV 3400mV vcc_ddr 0 0 0 1200mV 1200mV 1200mV vdd_gpu 0 0 0 1000mV 850mV 1350mV vdd_cpu 0 1 0 900mV 850mV 1350mV cpu0 900mV 900mV vcc_5v 0 2 0 5000mV 5000mV 5000mV vcc_otg_5v 0 0 0 5000mV 5000mV 5000mV vcc_host_5v 0 0 0 5000mV 5000mV 5000mV regulator-dummy 0 0 0 0mV 0mV 0mV Signed-off-by: Heiko Stuebner <heiko@sntech.de> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-04-07 14:16:39 +00:00
}
static int regulator_summary_show_roots(struct device *dev, void *data)
regulator: add a summary tree in debugfs On modern systems the regulator hierarchy can get quite long and nested with regulators supplying other regulators. In some cases when debugging it might be nice to get a tree of these regulators, their consumers and the regulation constraints in one go. To achieve this add a regulator_summary sysfs node, similar to clk_summary in the common clock framework, that walks the regulator list and creates a tree out of the regulators, their consumers and core per-regulator settings. On a rk3288-firefly the regulator_summary would for example look something like: regulator use open bypass value min max ----------------------------------------------------------------------- vcc_sys 0 12 0 5000mV 5000mV 5000mV vcc_lan 1 1 0 3300mV 3300mV 3300mV ff290000.ethernet 0mV 0mV vcca_33 0 0 0 3300mV 3300mV 3300mV vcca_18 0 0 0 1800mV 1800mV 1800mV vdd10_lcd 0 0 0 1000mV 1000mV 1000mV vccio_sd 0 0 0 3300mV 3300mV 3300mV vcc_20 0 3 0 2000mV 2000mV 2000mV vcc18_lcd 0 0 0 1800mV 1800mV 1800mV vcc_18 0 2 0 1800mV 1800mV 1800mV ff100000.saradc 0mV 0mV ff0d0000.dwmmc 1650mV 1950mV vdd_10 0 0 0 1000mV 1000mV 1000mV vdd_log 0 0 0 1100mV 1100mV 1100mV vcc_io 0 3 0 3300mV 3300mV 3300mV ff0f0000.dwmmc 3300mV 3400mV vcc_flash 1 1 0 1800mV 1800mV 1800mV ff0f0000.dwmmc 1700mV 1950mV vcc_sd 1 1 0 3300mV 3300mV 3300mV ff0c0000.dwmmc 3300mV 3400mV vcc_ddr 0 0 0 1200mV 1200mV 1200mV vdd_gpu 0 0 0 1000mV 850mV 1350mV vdd_cpu 0 1 0 900mV 850mV 1350mV cpu0 900mV 900mV vcc_5v 0 2 0 5000mV 5000mV 5000mV vcc_otg_5v 0 0 0 5000mV 5000mV 5000mV vcc_host_5v 0 0 0 5000mV 5000mV 5000mV regulator-dummy 0 0 0 0mV 0mV 0mV Signed-off-by: Heiko Stuebner <heiko@sntech.de> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-04-07 14:16:39 +00:00
{
struct regulator_dev *rdev = dev_to_rdev(dev);
struct seq_file *s = data;
regulator: add a summary tree in debugfs On modern systems the regulator hierarchy can get quite long and nested with regulators supplying other regulators. In some cases when debugging it might be nice to get a tree of these regulators, their consumers and the regulation constraints in one go. To achieve this add a regulator_summary sysfs node, similar to clk_summary in the common clock framework, that walks the regulator list and creates a tree out of the regulators, their consumers and core per-regulator settings. On a rk3288-firefly the regulator_summary would for example look something like: regulator use open bypass value min max ----------------------------------------------------------------------- vcc_sys 0 12 0 5000mV 5000mV 5000mV vcc_lan 1 1 0 3300mV 3300mV 3300mV ff290000.ethernet 0mV 0mV vcca_33 0 0 0 3300mV 3300mV 3300mV vcca_18 0 0 0 1800mV 1800mV 1800mV vdd10_lcd 0 0 0 1000mV 1000mV 1000mV vccio_sd 0 0 0 3300mV 3300mV 3300mV vcc_20 0 3 0 2000mV 2000mV 2000mV vcc18_lcd 0 0 0 1800mV 1800mV 1800mV vcc_18 0 2 0 1800mV 1800mV 1800mV ff100000.saradc 0mV 0mV ff0d0000.dwmmc 1650mV 1950mV vdd_10 0 0 0 1000mV 1000mV 1000mV vdd_log 0 0 0 1100mV 1100mV 1100mV vcc_io 0 3 0 3300mV 3300mV 3300mV ff0f0000.dwmmc 3300mV 3400mV vcc_flash 1 1 0 1800mV 1800mV 1800mV ff0f0000.dwmmc 1700mV 1950mV vcc_sd 1 1 0 3300mV 3300mV 3300mV ff0c0000.dwmmc 3300mV 3400mV vcc_ddr 0 0 0 1200mV 1200mV 1200mV vdd_gpu 0 0 0 1000mV 850mV 1350mV vdd_cpu 0 1 0 900mV 850mV 1350mV cpu0 900mV 900mV vcc_5v 0 2 0 5000mV 5000mV 5000mV vcc_otg_5v 0 0 0 5000mV 5000mV 5000mV vcc_host_5v 0 0 0 5000mV 5000mV 5000mV regulator-dummy 0 0 0 0mV 0mV 0mV Signed-off-by: Heiko Stuebner <heiko@sntech.de> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-04-07 14:16:39 +00:00
if (!rdev->supply)
regulator_summary_show_subtree(s, rdev, 0);
regulator: add a summary tree in debugfs On modern systems the regulator hierarchy can get quite long and nested with regulators supplying other regulators. In some cases when debugging it might be nice to get a tree of these regulators, their consumers and the regulation constraints in one go. To achieve this add a regulator_summary sysfs node, similar to clk_summary in the common clock framework, that walks the regulator list and creates a tree out of the regulators, their consumers and core per-regulator settings. On a rk3288-firefly the regulator_summary would for example look something like: regulator use open bypass value min max ----------------------------------------------------------------------- vcc_sys 0 12 0 5000mV 5000mV 5000mV vcc_lan 1 1 0 3300mV 3300mV 3300mV ff290000.ethernet 0mV 0mV vcca_33 0 0 0 3300mV 3300mV 3300mV vcca_18 0 0 0 1800mV 1800mV 1800mV vdd10_lcd 0 0 0 1000mV 1000mV 1000mV vccio_sd 0 0 0 3300mV 3300mV 3300mV vcc_20 0 3 0 2000mV 2000mV 2000mV vcc18_lcd 0 0 0 1800mV 1800mV 1800mV vcc_18 0 2 0 1800mV 1800mV 1800mV ff100000.saradc 0mV 0mV ff0d0000.dwmmc 1650mV 1950mV vdd_10 0 0 0 1000mV 1000mV 1000mV vdd_log 0 0 0 1100mV 1100mV 1100mV vcc_io 0 3 0 3300mV 3300mV 3300mV ff0f0000.dwmmc 3300mV 3400mV vcc_flash 1 1 0 1800mV 1800mV 1800mV ff0f0000.dwmmc 1700mV 1950mV vcc_sd 1 1 0 3300mV 3300mV 3300mV ff0c0000.dwmmc 3300mV 3400mV vcc_ddr 0 0 0 1200mV 1200mV 1200mV vdd_gpu 0 0 0 1000mV 850mV 1350mV vdd_cpu 0 1 0 900mV 850mV 1350mV cpu0 900mV 900mV vcc_5v 0 2 0 5000mV 5000mV 5000mV vcc_otg_5v 0 0 0 5000mV 5000mV 5000mV vcc_host_5v 0 0 0 5000mV 5000mV 5000mV regulator-dummy 0 0 0 0mV 0mV 0mV Signed-off-by: Heiko Stuebner <heiko@sntech.de> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-04-07 14:16:39 +00:00
return 0;
}
regulator: add a summary tree in debugfs On modern systems the regulator hierarchy can get quite long and nested with regulators supplying other regulators. In some cases when debugging it might be nice to get a tree of these regulators, their consumers and the regulation constraints in one go. To achieve this add a regulator_summary sysfs node, similar to clk_summary in the common clock framework, that walks the regulator list and creates a tree out of the regulators, their consumers and core per-regulator settings. On a rk3288-firefly the regulator_summary would for example look something like: regulator use open bypass value min max ----------------------------------------------------------------------- vcc_sys 0 12 0 5000mV 5000mV 5000mV vcc_lan 1 1 0 3300mV 3300mV 3300mV ff290000.ethernet 0mV 0mV vcca_33 0 0 0 3300mV 3300mV 3300mV vcca_18 0 0 0 1800mV 1800mV 1800mV vdd10_lcd 0 0 0 1000mV 1000mV 1000mV vccio_sd 0 0 0 3300mV 3300mV 3300mV vcc_20 0 3 0 2000mV 2000mV 2000mV vcc18_lcd 0 0 0 1800mV 1800mV 1800mV vcc_18 0 2 0 1800mV 1800mV 1800mV ff100000.saradc 0mV 0mV ff0d0000.dwmmc 1650mV 1950mV vdd_10 0 0 0 1000mV 1000mV 1000mV vdd_log 0 0 0 1100mV 1100mV 1100mV vcc_io 0 3 0 3300mV 3300mV 3300mV ff0f0000.dwmmc 3300mV 3400mV vcc_flash 1 1 0 1800mV 1800mV 1800mV ff0f0000.dwmmc 1700mV 1950mV vcc_sd 1 1 0 3300mV 3300mV 3300mV ff0c0000.dwmmc 3300mV 3400mV vcc_ddr 0 0 0 1200mV 1200mV 1200mV vdd_gpu 0 0 0 1000mV 850mV 1350mV vdd_cpu 0 1 0 900mV 850mV 1350mV cpu0 900mV 900mV vcc_5v 0 2 0 5000mV 5000mV 5000mV vcc_otg_5v 0 0 0 5000mV 5000mV 5000mV vcc_host_5v 0 0 0 5000mV 5000mV 5000mV regulator-dummy 0 0 0 0mV 0mV 0mV Signed-off-by: Heiko Stuebner <heiko@sntech.de> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-04-07 14:16:39 +00:00
static int regulator_summary_show(struct seq_file *s, void *data)
{
seq_puts(s, " regulator use open bypass voltage current min max\n");
seq_puts(s, "-------------------------------------------------------------------------------\n");
regulator: add a summary tree in debugfs On modern systems the regulator hierarchy can get quite long and nested with regulators supplying other regulators. In some cases when debugging it might be nice to get a tree of these regulators, their consumers and the regulation constraints in one go. To achieve this add a regulator_summary sysfs node, similar to clk_summary in the common clock framework, that walks the regulator list and creates a tree out of the regulators, their consumers and core per-regulator settings. On a rk3288-firefly the regulator_summary would for example look something like: regulator use open bypass value min max ----------------------------------------------------------------------- vcc_sys 0 12 0 5000mV 5000mV 5000mV vcc_lan 1 1 0 3300mV 3300mV 3300mV ff290000.ethernet 0mV 0mV vcca_33 0 0 0 3300mV 3300mV 3300mV vcca_18 0 0 0 1800mV 1800mV 1800mV vdd10_lcd 0 0 0 1000mV 1000mV 1000mV vccio_sd 0 0 0 3300mV 3300mV 3300mV vcc_20 0 3 0 2000mV 2000mV 2000mV vcc18_lcd 0 0 0 1800mV 1800mV 1800mV vcc_18 0 2 0 1800mV 1800mV 1800mV ff100000.saradc 0mV 0mV ff0d0000.dwmmc 1650mV 1950mV vdd_10 0 0 0 1000mV 1000mV 1000mV vdd_log 0 0 0 1100mV 1100mV 1100mV vcc_io 0 3 0 3300mV 3300mV 3300mV ff0f0000.dwmmc 3300mV 3400mV vcc_flash 1 1 0 1800mV 1800mV 1800mV ff0f0000.dwmmc 1700mV 1950mV vcc_sd 1 1 0 3300mV 3300mV 3300mV ff0c0000.dwmmc 3300mV 3400mV vcc_ddr 0 0 0 1200mV 1200mV 1200mV vdd_gpu 0 0 0 1000mV 850mV 1350mV vdd_cpu 0 1 0 900mV 850mV 1350mV cpu0 900mV 900mV vcc_5v 0 2 0 5000mV 5000mV 5000mV vcc_otg_5v 0 0 0 5000mV 5000mV 5000mV vcc_host_5v 0 0 0 5000mV 5000mV 5000mV regulator-dummy 0 0 0 0mV 0mV 0mV Signed-off-by: Heiko Stuebner <heiko@sntech.de> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-04-07 14:16:39 +00:00
class_for_each_device(&regulator_class, NULL, s,
regulator_summary_show_roots);
regulator: add a summary tree in debugfs On modern systems the regulator hierarchy can get quite long and nested with regulators supplying other regulators. In some cases when debugging it might be nice to get a tree of these regulators, their consumers and the regulation constraints in one go. To achieve this add a regulator_summary sysfs node, similar to clk_summary in the common clock framework, that walks the regulator list and creates a tree out of the regulators, their consumers and core per-regulator settings. On a rk3288-firefly the regulator_summary would for example look something like: regulator use open bypass value min max ----------------------------------------------------------------------- vcc_sys 0 12 0 5000mV 5000mV 5000mV vcc_lan 1 1 0 3300mV 3300mV 3300mV ff290000.ethernet 0mV 0mV vcca_33 0 0 0 3300mV 3300mV 3300mV vcca_18 0 0 0 1800mV 1800mV 1800mV vdd10_lcd 0 0 0 1000mV 1000mV 1000mV vccio_sd 0 0 0 3300mV 3300mV 3300mV vcc_20 0 3 0 2000mV 2000mV 2000mV vcc18_lcd 0 0 0 1800mV 1800mV 1800mV vcc_18 0 2 0 1800mV 1800mV 1800mV ff100000.saradc 0mV 0mV ff0d0000.dwmmc 1650mV 1950mV vdd_10 0 0 0 1000mV 1000mV 1000mV vdd_log 0 0 0 1100mV 1100mV 1100mV vcc_io 0 3 0 3300mV 3300mV 3300mV ff0f0000.dwmmc 3300mV 3400mV vcc_flash 1 1 0 1800mV 1800mV 1800mV ff0f0000.dwmmc 1700mV 1950mV vcc_sd 1 1 0 3300mV 3300mV 3300mV ff0c0000.dwmmc 3300mV 3400mV vcc_ddr 0 0 0 1200mV 1200mV 1200mV vdd_gpu 0 0 0 1000mV 850mV 1350mV vdd_cpu 0 1 0 900mV 850mV 1350mV cpu0 900mV 900mV vcc_5v 0 2 0 5000mV 5000mV 5000mV vcc_otg_5v 0 0 0 5000mV 5000mV 5000mV vcc_host_5v 0 0 0 5000mV 5000mV 5000mV regulator-dummy 0 0 0 0mV 0mV 0mV Signed-off-by: Heiko Stuebner <heiko@sntech.de> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-04-07 14:16:39 +00:00
return 0;
}
static int regulator_summary_open(struct inode *inode, struct file *file)
{
return single_open(file, regulator_summary_show, inode->i_private);
}
#endif
static const struct file_operations regulator_summary_fops = {
#ifdef CONFIG_DEBUG_FS
.open = regulator_summary_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
#endif
};
static int __init regulator_init(void)
{
int ret;
ret = class_register(&regulator_class);
debugfs_root = debugfs_create_dir("regulator", NULL);
if (!debugfs_root)
pr_warn("regulator: Failed to create debugfs directory\n");
debugfs_create_file("supply_map", 0444, debugfs_root, NULL,
&supply_map_fops);
regulator: add a summary tree in debugfs On modern systems the regulator hierarchy can get quite long and nested with regulators supplying other regulators. In some cases when debugging it might be nice to get a tree of these regulators, their consumers and the regulation constraints in one go. To achieve this add a regulator_summary sysfs node, similar to clk_summary in the common clock framework, that walks the regulator list and creates a tree out of the regulators, their consumers and core per-regulator settings. On a rk3288-firefly the regulator_summary would for example look something like: regulator use open bypass value min max ----------------------------------------------------------------------- vcc_sys 0 12 0 5000mV 5000mV 5000mV vcc_lan 1 1 0 3300mV 3300mV 3300mV ff290000.ethernet 0mV 0mV vcca_33 0 0 0 3300mV 3300mV 3300mV vcca_18 0 0 0 1800mV 1800mV 1800mV vdd10_lcd 0 0 0 1000mV 1000mV 1000mV vccio_sd 0 0 0 3300mV 3300mV 3300mV vcc_20 0 3 0 2000mV 2000mV 2000mV vcc18_lcd 0 0 0 1800mV 1800mV 1800mV vcc_18 0 2 0 1800mV 1800mV 1800mV ff100000.saradc 0mV 0mV ff0d0000.dwmmc 1650mV 1950mV vdd_10 0 0 0 1000mV 1000mV 1000mV vdd_log 0 0 0 1100mV 1100mV 1100mV vcc_io 0 3 0 3300mV 3300mV 3300mV ff0f0000.dwmmc 3300mV 3400mV vcc_flash 1 1 0 1800mV 1800mV 1800mV ff0f0000.dwmmc 1700mV 1950mV vcc_sd 1 1 0 3300mV 3300mV 3300mV ff0c0000.dwmmc 3300mV 3400mV vcc_ddr 0 0 0 1200mV 1200mV 1200mV vdd_gpu 0 0 0 1000mV 850mV 1350mV vdd_cpu 0 1 0 900mV 850mV 1350mV cpu0 900mV 900mV vcc_5v 0 2 0 5000mV 5000mV 5000mV vcc_otg_5v 0 0 0 5000mV 5000mV 5000mV vcc_host_5v 0 0 0 5000mV 5000mV 5000mV regulator-dummy 0 0 0 0mV 0mV 0mV Signed-off-by: Heiko Stuebner <heiko@sntech.de> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-04-07 14:16:39 +00:00
debugfs_create_file("regulator_summary", 0444, debugfs_root,
NULL, &regulator_summary_fops);
regulator: add a summary tree in debugfs On modern systems the regulator hierarchy can get quite long and nested with regulators supplying other regulators. In some cases when debugging it might be nice to get a tree of these regulators, their consumers and the regulation constraints in one go. To achieve this add a regulator_summary sysfs node, similar to clk_summary in the common clock framework, that walks the regulator list and creates a tree out of the regulators, their consumers and core per-regulator settings. On a rk3288-firefly the regulator_summary would for example look something like: regulator use open bypass value min max ----------------------------------------------------------------------- vcc_sys 0 12 0 5000mV 5000mV 5000mV vcc_lan 1 1 0 3300mV 3300mV 3300mV ff290000.ethernet 0mV 0mV vcca_33 0 0 0 3300mV 3300mV 3300mV vcca_18 0 0 0 1800mV 1800mV 1800mV vdd10_lcd 0 0 0 1000mV 1000mV 1000mV vccio_sd 0 0 0 3300mV 3300mV 3300mV vcc_20 0 3 0 2000mV 2000mV 2000mV vcc18_lcd 0 0 0 1800mV 1800mV 1800mV vcc_18 0 2 0 1800mV 1800mV 1800mV ff100000.saradc 0mV 0mV ff0d0000.dwmmc 1650mV 1950mV vdd_10 0 0 0 1000mV 1000mV 1000mV vdd_log 0 0 0 1100mV 1100mV 1100mV vcc_io 0 3 0 3300mV 3300mV 3300mV ff0f0000.dwmmc 3300mV 3400mV vcc_flash 1 1 0 1800mV 1800mV 1800mV ff0f0000.dwmmc 1700mV 1950mV vcc_sd 1 1 0 3300mV 3300mV 3300mV ff0c0000.dwmmc 3300mV 3400mV vcc_ddr 0 0 0 1200mV 1200mV 1200mV vdd_gpu 0 0 0 1000mV 850mV 1350mV vdd_cpu 0 1 0 900mV 850mV 1350mV cpu0 900mV 900mV vcc_5v 0 2 0 5000mV 5000mV 5000mV vcc_otg_5v 0 0 0 5000mV 5000mV 5000mV vcc_host_5v 0 0 0 5000mV 5000mV 5000mV regulator-dummy 0 0 0 0mV 0mV 0mV Signed-off-by: Heiko Stuebner <heiko@sntech.de> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-04-07 14:16:39 +00:00
regulator_dummy_init();
return ret;
}
/* init early to allow our consumers to complete system booting */
core_initcall(regulator_init);
static int __init regulator_late_cleanup(struct device *dev, void *data)
{
struct regulator_dev *rdev = dev_to_rdev(dev);
const struct regulator_ops *ops = rdev->desc->ops;
struct regulation_constraints *c = rdev->constraints;
int enabled, ret;
if (c && c->always_on)
return 0;
if (!regulator_ops_is_valid(rdev, REGULATOR_CHANGE_STATUS))
return 0;
mutex_lock(&rdev->mutex);
if (rdev->use_count)
goto unlock;
/* If we can't read the status assume it's on. */
if (ops->is_enabled)
enabled = ops->is_enabled(rdev);
else
enabled = 1;
if (!enabled)
goto unlock;
if (have_full_constraints()) {
/* We log since this may kill the system if it goes
* wrong. */
rdev_info(rdev, "disabling\n");
ret = _regulator_do_disable(rdev);
if (ret != 0)
rdev_err(rdev, "couldn't disable: %d\n", ret);
} else {
/* The intention is that in future we will
* assume that full constraints are provided
* so warn even if we aren't going to do
* anything here.
*/
rdev_warn(rdev, "incomplete constraints, leaving on\n");
}
unlock:
mutex_unlock(&rdev->mutex);
return 0;
}
static int __init regulator_init_complete(void)
{
/*
* Since DT doesn't provide an idiomatic mechanism for
* enabling full constraints and since it's much more natural
* with DT to provide them just assume that a DT enabled
* system has full constraints.
*/
if (of_have_populated_dt())
has_full_constraints = true;
/* If we have a full configuration then disable any regulators
* we have permission to change the status for and which are
* not in use or always_on. This is effectively the default
* for DT and ACPI as they have full constraints.
*/
class_for_each_device(&regulator_class, NULL, NULL,
regulator_late_cleanup);
return 0;
}
late_initcall_sync(regulator_init_complete);