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linux/drivers/regulator/wm831x-ldo.c
Tejun Heo 5a0e3ad6af 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>
2010-03-30 22:02:32 +09:00

859 lines
21 KiB
C
Raw Blame History

/*
* wm831x-ldo.c -- LDO driver for the WM831x series
*
* Copyright 2009 Wolfson Microelectronics PLC.
*
* Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
*
* 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/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/bitops.h>
#include <linux/err.h>
#include <linux/i2c.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/slab.h>
#include <linux/mfd/wm831x/core.h>
#include <linux/mfd/wm831x/regulator.h>
#include <linux/mfd/wm831x/pdata.h>
#define WM831X_LDO_MAX_NAME 6
#define WM831X_LDO_CONTROL 0
#define WM831X_LDO_ON_CONTROL 1
#define WM831X_LDO_SLEEP_CONTROL 2
#define WM831X_ALIVE_LDO_ON_CONTROL 0
#define WM831X_ALIVE_LDO_SLEEP_CONTROL 1
struct wm831x_ldo {
char name[WM831X_LDO_MAX_NAME];
struct regulator_desc desc;
int base;
struct wm831x *wm831x;
struct regulator_dev *regulator;
};
/*
* Shared
*/
static int wm831x_ldo_is_enabled(struct regulator_dev *rdev)
{
struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
struct wm831x *wm831x = ldo->wm831x;
int mask = 1 << rdev_get_id(rdev);
int reg;
reg = wm831x_reg_read(wm831x, WM831X_LDO_ENABLE);
if (reg < 0)
return reg;
if (reg & mask)
return 1;
else
return 0;
}
static int wm831x_ldo_enable(struct regulator_dev *rdev)
{
struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
struct wm831x *wm831x = ldo->wm831x;
int mask = 1 << rdev_get_id(rdev);
return wm831x_set_bits(wm831x, WM831X_LDO_ENABLE, mask, mask);
}
static int wm831x_ldo_disable(struct regulator_dev *rdev)
{
struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
struct wm831x *wm831x = ldo->wm831x;
int mask = 1 << rdev_get_id(rdev);
return wm831x_set_bits(wm831x, WM831X_LDO_ENABLE, mask, 0);
}
static irqreturn_t wm831x_ldo_uv_irq(int irq, void *data)
{
struct wm831x_ldo *ldo = data;
regulator_notifier_call_chain(ldo->regulator,
REGULATOR_EVENT_UNDER_VOLTAGE,
NULL);
return IRQ_HANDLED;
}
/*
* General purpose LDOs
*/
#define WM831X_GP_LDO_SELECTOR_LOW 0xe
#define WM831X_GP_LDO_MAX_SELECTOR 0x1f
static int wm831x_gp_ldo_list_voltage(struct regulator_dev *rdev,
unsigned int selector)
{
/* 0.9-1.6V in 50mV steps */
if (selector <= WM831X_GP_LDO_SELECTOR_LOW)
return 900000 + (selector * 50000);
/* 1.7-3.3V in 50mV steps */
if (selector <= WM831X_GP_LDO_MAX_SELECTOR)
return 1600000 + ((selector - WM831X_GP_LDO_SELECTOR_LOW)
* 100000);
return -EINVAL;
}
static int wm831x_gp_ldo_set_voltage_int(struct regulator_dev *rdev, int reg,
int min_uV, int max_uV)
{
struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
struct wm831x *wm831x = ldo->wm831x;
int vsel, ret;
if (min_uV < 900000)
vsel = 0;
else if (min_uV < 1700000)
vsel = ((min_uV - 900000) / 50000);
else
vsel = ((min_uV - 1700000) / 100000)
+ WM831X_GP_LDO_SELECTOR_LOW + 1;
ret = wm831x_gp_ldo_list_voltage(rdev, vsel);
if (ret < 0)
return ret;
if (ret < min_uV || ret > max_uV)
return -EINVAL;
return wm831x_set_bits(wm831x, reg, WM831X_LDO1_ON_VSEL_MASK, vsel);
}
static int wm831x_gp_ldo_set_voltage(struct regulator_dev *rdev,
int min_uV, int max_uV)
{
struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
int reg = ldo->base + WM831X_LDO_ON_CONTROL;
return wm831x_gp_ldo_set_voltage_int(rdev, reg, min_uV, max_uV);
}
static int wm831x_gp_ldo_set_suspend_voltage(struct regulator_dev *rdev,
int uV)
{
struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
int reg = ldo->base + WM831X_LDO_SLEEP_CONTROL;
return wm831x_gp_ldo_set_voltage_int(rdev, reg, uV, uV);
}
static int wm831x_gp_ldo_get_voltage(struct regulator_dev *rdev)
{
struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
struct wm831x *wm831x = ldo->wm831x;
int reg = ldo->base + WM831X_LDO_ON_CONTROL;
int ret;
ret = wm831x_reg_read(wm831x, reg);
if (ret < 0)
return ret;
ret &= WM831X_LDO1_ON_VSEL_MASK;
return wm831x_gp_ldo_list_voltage(rdev, ret);
}
static unsigned int wm831x_gp_ldo_get_mode(struct regulator_dev *rdev)
{
struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
struct wm831x *wm831x = ldo->wm831x;
int ctrl_reg = ldo->base + WM831X_LDO_CONTROL;
int on_reg = ldo->base + WM831X_LDO_ON_CONTROL;
int ret;
ret = wm831x_reg_read(wm831x, on_reg);
if (ret < 0)
return ret;
if (!(ret & WM831X_LDO1_ON_MODE))
return REGULATOR_MODE_NORMAL;
ret = wm831x_reg_read(wm831x, ctrl_reg);
if (ret < 0)
return ret;
if (ret & WM831X_LDO1_LP_MODE)
return REGULATOR_MODE_STANDBY;
else
return REGULATOR_MODE_IDLE;
}
static int wm831x_gp_ldo_set_mode(struct regulator_dev *rdev,
unsigned int mode)
{
struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
struct wm831x *wm831x = ldo->wm831x;
int ctrl_reg = ldo->base + WM831X_LDO_CONTROL;
int on_reg = ldo->base + WM831X_LDO_ON_CONTROL;
int ret;
switch (mode) {
case REGULATOR_MODE_NORMAL:
ret = wm831x_set_bits(wm831x, on_reg,
WM831X_LDO1_ON_MODE, 0);
if (ret < 0)
return ret;
break;
case REGULATOR_MODE_IDLE:
ret = wm831x_set_bits(wm831x, ctrl_reg,
WM831X_LDO1_LP_MODE,
WM831X_LDO1_LP_MODE);
if (ret < 0)
return ret;
ret = wm831x_set_bits(wm831x, on_reg,
WM831X_LDO1_ON_MODE,
WM831X_LDO1_ON_MODE);
if (ret < 0)
return ret;
case REGULATOR_MODE_STANDBY:
ret = wm831x_set_bits(wm831x, ctrl_reg,
WM831X_LDO1_LP_MODE, 0);
if (ret < 0)
return ret;
ret = wm831x_set_bits(wm831x, on_reg,
WM831X_LDO1_ON_MODE,
WM831X_LDO1_ON_MODE);
if (ret < 0)
return ret;
break;
default:
return -EINVAL;
}
return 0;
}
static int wm831x_gp_ldo_get_status(struct regulator_dev *rdev)
{
struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
struct wm831x *wm831x = ldo->wm831x;
int mask = 1 << rdev_get_id(rdev);
int ret;
/* Is the regulator on? */
ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS);
if (ret < 0)
return ret;
if (!(ret & mask))
return REGULATOR_STATUS_OFF;
/* Is it reporting under voltage? */
ret = wm831x_reg_read(wm831x, WM831X_LDO_UV_STATUS);
if (ret & mask)
return REGULATOR_STATUS_ERROR;
ret = wm831x_gp_ldo_get_mode(rdev);
if (ret < 0)
return ret;
else
return regulator_mode_to_status(ret);
}
static unsigned int wm831x_gp_ldo_get_optimum_mode(struct regulator_dev *rdev,
int input_uV,
int output_uV, int load_uA)
{
if (load_uA < 20000)
return REGULATOR_MODE_STANDBY;
if (load_uA < 50000)
return REGULATOR_MODE_IDLE;
return REGULATOR_MODE_NORMAL;
}
static struct regulator_ops wm831x_gp_ldo_ops = {
.list_voltage = wm831x_gp_ldo_list_voltage,
.get_voltage = wm831x_gp_ldo_get_voltage,
.set_voltage = wm831x_gp_ldo_set_voltage,
.set_suspend_voltage = wm831x_gp_ldo_set_suspend_voltage,
.get_mode = wm831x_gp_ldo_get_mode,
.set_mode = wm831x_gp_ldo_set_mode,
.get_status = wm831x_gp_ldo_get_status,
.get_optimum_mode = wm831x_gp_ldo_get_optimum_mode,
.is_enabled = wm831x_ldo_is_enabled,
.enable = wm831x_ldo_enable,
.disable = wm831x_ldo_disable,
};
static __devinit int wm831x_gp_ldo_probe(struct platform_device *pdev)
{
struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
struct wm831x_pdata *pdata = wm831x->dev->platform_data;
int id = pdev->id % ARRAY_SIZE(pdata->ldo);
struct wm831x_ldo *ldo;
struct resource *res;
int ret, irq;
dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1);
if (pdata == NULL || pdata->ldo[id] == NULL)
return -ENODEV;
ldo = kzalloc(sizeof(struct wm831x_ldo), GFP_KERNEL);
if (ldo == NULL) {
dev_err(&pdev->dev, "Unable to allocate private data\n");
return -ENOMEM;
}
ldo->wm831x = wm831x;
res = platform_get_resource(pdev, IORESOURCE_IO, 0);
if (res == NULL) {
dev_err(&pdev->dev, "No I/O resource\n");
ret = -EINVAL;
goto err;
}
ldo->base = res->start;
snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1);
ldo->desc.name = ldo->name;
ldo->desc.id = id;
ldo->desc.type = REGULATOR_VOLTAGE;
ldo->desc.n_voltages = WM831X_GP_LDO_MAX_SELECTOR + 1;
ldo->desc.ops = &wm831x_gp_ldo_ops;
ldo->desc.owner = THIS_MODULE;
ldo->regulator = regulator_register(&ldo->desc, &pdev->dev,
pdata->ldo[id], ldo);
if (IS_ERR(ldo->regulator)) {
ret = PTR_ERR(ldo->regulator);
dev_err(wm831x->dev, "Failed to register LDO%d: %d\n",
id + 1, ret);
goto err;
}
irq = platform_get_irq_byname(pdev, "UV");
ret = wm831x_request_irq(wm831x, irq, wm831x_ldo_uv_irq,
IRQF_TRIGGER_RISING, ldo->name,
ldo);
if (ret != 0) {
dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n",
irq, ret);
goto err_regulator;
}
platform_set_drvdata(pdev, ldo);
return 0;
err_regulator:
regulator_unregister(ldo->regulator);
err:
kfree(ldo);
return ret;
}
static __devexit int wm831x_gp_ldo_remove(struct platform_device *pdev)
{
struct wm831x_ldo *ldo = platform_get_drvdata(pdev);
struct wm831x *wm831x = ldo->wm831x;
platform_set_drvdata(pdev, NULL);
wm831x_free_irq(wm831x, platform_get_irq_byname(pdev, "UV"), ldo);
regulator_unregister(ldo->regulator);
kfree(ldo);
return 0;
}
static struct platform_driver wm831x_gp_ldo_driver = {
.probe = wm831x_gp_ldo_probe,
.remove = __devexit_p(wm831x_gp_ldo_remove),
.driver = {
.name = "wm831x-ldo",
.owner = THIS_MODULE,
},
};
/*
* Analogue LDOs
*/
#define WM831X_ALDO_SELECTOR_LOW 0xc
#define WM831X_ALDO_MAX_SELECTOR 0x1f
static int wm831x_aldo_list_voltage(struct regulator_dev *rdev,
unsigned int selector)
{
/* 1-1.6V in 50mV steps */
if (selector <= WM831X_ALDO_SELECTOR_LOW)
return 1000000 + (selector * 50000);
/* 1.7-3.5V in 50mV steps */
if (selector <= WM831X_ALDO_MAX_SELECTOR)
return 1600000 + ((selector - WM831X_ALDO_SELECTOR_LOW)
* 100000);
return -EINVAL;
}
static int wm831x_aldo_set_voltage_int(struct regulator_dev *rdev, int reg,
int min_uV, int max_uV)
{
struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
struct wm831x *wm831x = ldo->wm831x;
int vsel, ret;
if (min_uV < 1000000)
vsel = 0;
else if (min_uV < 1700000)
vsel = ((min_uV - 1000000) / 50000);
else
vsel = ((min_uV - 1700000) / 100000)
+ WM831X_ALDO_SELECTOR_LOW + 1;
ret = wm831x_aldo_list_voltage(rdev, vsel);
if (ret < 0)
return ret;
if (ret < min_uV || ret > max_uV)
return -EINVAL;
return wm831x_set_bits(wm831x, reg, WM831X_LDO7_ON_VSEL_MASK, vsel);
}
static int wm831x_aldo_set_voltage(struct regulator_dev *rdev,
int min_uV, int max_uV)
{
struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
int reg = ldo->base + WM831X_LDO_ON_CONTROL;
return wm831x_aldo_set_voltage_int(rdev, reg, min_uV, max_uV);
}
static int wm831x_aldo_set_suspend_voltage(struct regulator_dev *rdev,
int uV)
{
struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
int reg = ldo->base + WM831X_LDO_SLEEP_CONTROL;
return wm831x_aldo_set_voltage_int(rdev, reg, uV, uV);
}
static int wm831x_aldo_get_voltage(struct regulator_dev *rdev)
{
struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
struct wm831x *wm831x = ldo->wm831x;
int reg = ldo->base + WM831X_LDO_ON_CONTROL;
int ret;
ret = wm831x_reg_read(wm831x, reg);
if (ret < 0)
return ret;
ret &= WM831X_LDO7_ON_VSEL_MASK;
return wm831x_aldo_list_voltage(rdev, ret);
}
static unsigned int wm831x_aldo_get_mode(struct regulator_dev *rdev)
{
struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
struct wm831x *wm831x = ldo->wm831x;
int on_reg = ldo->base + WM831X_LDO_ON_CONTROL;
int ret;
ret = wm831x_reg_read(wm831x, on_reg);
if (ret < 0)
return 0;
if (ret & WM831X_LDO7_ON_MODE)
return REGULATOR_MODE_IDLE;
else
return REGULATOR_MODE_NORMAL;
}
static int wm831x_aldo_set_mode(struct regulator_dev *rdev,
unsigned int mode)
{
struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
struct wm831x *wm831x = ldo->wm831x;
int ctrl_reg = ldo->base + WM831X_LDO_CONTROL;
int on_reg = ldo->base + WM831X_LDO_ON_CONTROL;
int ret;
switch (mode) {
case REGULATOR_MODE_NORMAL:
ret = wm831x_set_bits(wm831x, on_reg,
WM831X_LDO7_ON_MODE, 0);
if (ret < 0)
return ret;
break;
case REGULATOR_MODE_IDLE:
ret = wm831x_set_bits(wm831x, ctrl_reg,
WM831X_LDO7_ON_MODE,
WM831X_LDO7_ON_MODE);
if (ret < 0)
return ret;
break;
default:
return -EINVAL;
}
return 0;
}
static int wm831x_aldo_get_status(struct regulator_dev *rdev)
{
struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
struct wm831x *wm831x = ldo->wm831x;
int mask = 1 << rdev_get_id(rdev);
int ret;
/* Is the regulator on? */
ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS);
if (ret < 0)
return ret;
if (!(ret & mask))
return REGULATOR_STATUS_OFF;
/* Is it reporting under voltage? */
ret = wm831x_reg_read(wm831x, WM831X_LDO_UV_STATUS);
if (ret & mask)
return REGULATOR_STATUS_ERROR;
ret = wm831x_aldo_get_mode(rdev);
if (ret < 0)
return ret;
else
return regulator_mode_to_status(ret);
}
static struct regulator_ops wm831x_aldo_ops = {
.list_voltage = wm831x_aldo_list_voltage,
.get_voltage = wm831x_aldo_get_voltage,
.set_voltage = wm831x_aldo_set_voltage,
.set_suspend_voltage = wm831x_aldo_set_suspend_voltage,
.get_mode = wm831x_aldo_get_mode,
.set_mode = wm831x_aldo_set_mode,
.get_status = wm831x_aldo_get_status,
.is_enabled = wm831x_ldo_is_enabled,
.enable = wm831x_ldo_enable,
.disable = wm831x_ldo_disable,
};
static __devinit int wm831x_aldo_probe(struct platform_device *pdev)
{
struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
struct wm831x_pdata *pdata = wm831x->dev->platform_data;
int id = pdev->id % ARRAY_SIZE(pdata->ldo);
struct wm831x_ldo *ldo;
struct resource *res;
int ret, irq;
dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1);
if (pdata == NULL || pdata->ldo[id] == NULL)
return -ENODEV;
ldo = kzalloc(sizeof(struct wm831x_ldo), GFP_KERNEL);
if (ldo == NULL) {
dev_err(&pdev->dev, "Unable to allocate private data\n");
return -ENOMEM;
}
ldo->wm831x = wm831x;
res = platform_get_resource(pdev, IORESOURCE_IO, 0);
if (res == NULL) {
dev_err(&pdev->dev, "No I/O resource\n");
ret = -EINVAL;
goto err;
}
ldo->base = res->start;
snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1);
ldo->desc.name = ldo->name;
ldo->desc.id = id;
ldo->desc.type = REGULATOR_VOLTAGE;
ldo->desc.n_voltages = WM831X_ALDO_MAX_SELECTOR + 1;
ldo->desc.ops = &wm831x_aldo_ops;
ldo->desc.owner = THIS_MODULE;
ldo->regulator = regulator_register(&ldo->desc, &pdev->dev,
pdata->ldo[id], ldo);
if (IS_ERR(ldo->regulator)) {
ret = PTR_ERR(ldo->regulator);
dev_err(wm831x->dev, "Failed to register LDO%d: %d\n",
id + 1, ret);
goto err;
}
irq = platform_get_irq_byname(pdev, "UV");
ret = wm831x_request_irq(wm831x, irq, wm831x_ldo_uv_irq,
IRQF_TRIGGER_RISING, ldo->name,
ldo);
if (ret != 0) {
dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n",
irq, ret);
goto err_regulator;
}
platform_set_drvdata(pdev, ldo);
return 0;
err_regulator:
regulator_unregister(ldo->regulator);
err:
kfree(ldo);
return ret;
}
static __devexit int wm831x_aldo_remove(struct platform_device *pdev)
{
struct wm831x_ldo *ldo = platform_get_drvdata(pdev);
struct wm831x *wm831x = ldo->wm831x;
wm831x_free_irq(wm831x, platform_get_irq_byname(pdev, "UV"), ldo);
regulator_unregister(ldo->regulator);
kfree(ldo);
return 0;
}
static struct platform_driver wm831x_aldo_driver = {
.probe = wm831x_aldo_probe,
.remove = __devexit_p(wm831x_aldo_remove),
.driver = {
.name = "wm831x-aldo",
.owner = THIS_MODULE,
},
};
/*
* Alive LDO
*/
#define WM831X_ALIVE_LDO_MAX_SELECTOR 0xf
static int wm831x_alive_ldo_list_voltage(struct regulator_dev *rdev,
unsigned int selector)
{
/* 0.8-1.55V in 50mV steps */
if (selector <= WM831X_ALIVE_LDO_MAX_SELECTOR)
return 800000 + (selector * 50000);
return -EINVAL;
}
static int wm831x_alive_ldo_set_voltage_int(struct regulator_dev *rdev,
int reg,
int min_uV, int max_uV)
{
struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
struct wm831x *wm831x = ldo->wm831x;
int vsel, ret;
vsel = (min_uV - 800000) / 50000;
ret = wm831x_alive_ldo_list_voltage(rdev, vsel);
if (ret < 0)
return ret;
if (ret < min_uV || ret > max_uV)
return -EINVAL;
return wm831x_set_bits(wm831x, reg, WM831X_LDO11_ON_VSEL_MASK, vsel);
}
static int wm831x_alive_ldo_set_voltage(struct regulator_dev *rdev,
int min_uV, int max_uV)
{
struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
int reg = ldo->base + WM831X_ALIVE_LDO_ON_CONTROL;
return wm831x_alive_ldo_set_voltage_int(rdev, reg, min_uV, max_uV);
}
static int wm831x_alive_ldo_set_suspend_voltage(struct regulator_dev *rdev,
int uV)
{
struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
int reg = ldo->base + WM831X_ALIVE_LDO_SLEEP_CONTROL;
return wm831x_alive_ldo_set_voltage_int(rdev, reg, uV, uV);
}
static int wm831x_alive_ldo_get_voltage(struct regulator_dev *rdev)
{
struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
struct wm831x *wm831x = ldo->wm831x;
int reg = ldo->base + WM831X_ALIVE_LDO_ON_CONTROL;
int ret;
ret = wm831x_reg_read(wm831x, reg);
if (ret < 0)
return ret;
ret &= WM831X_LDO11_ON_VSEL_MASK;
return wm831x_alive_ldo_list_voltage(rdev, ret);
}
static int wm831x_alive_ldo_get_status(struct regulator_dev *rdev)
{
struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
struct wm831x *wm831x = ldo->wm831x;
int mask = 1 << rdev_get_id(rdev);
int ret;
/* Is the regulator on? */
ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS);
if (ret < 0)
return ret;
if (ret & mask)
return REGULATOR_STATUS_ON;
else
return REGULATOR_STATUS_OFF;
}
static struct regulator_ops wm831x_alive_ldo_ops = {
.list_voltage = wm831x_alive_ldo_list_voltage,
.get_voltage = wm831x_alive_ldo_get_voltage,
.set_voltage = wm831x_alive_ldo_set_voltage,
.set_suspend_voltage = wm831x_alive_ldo_set_suspend_voltage,
.get_status = wm831x_alive_ldo_get_status,
.is_enabled = wm831x_ldo_is_enabled,
.enable = wm831x_ldo_enable,
.disable = wm831x_ldo_disable,
};
static __devinit int wm831x_alive_ldo_probe(struct platform_device *pdev)
{
struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
struct wm831x_pdata *pdata = wm831x->dev->platform_data;
int id = pdev->id % ARRAY_SIZE(pdata->ldo);
struct wm831x_ldo *ldo;
struct resource *res;
int ret;
dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1);
if (pdata == NULL || pdata->ldo[id] == NULL)
return -ENODEV;
ldo = kzalloc(sizeof(struct wm831x_ldo), GFP_KERNEL);
if (ldo == NULL) {
dev_err(&pdev->dev, "Unable to allocate private data\n");
return -ENOMEM;
}
ldo->wm831x = wm831x;
res = platform_get_resource(pdev, IORESOURCE_IO, 0);
if (res == NULL) {
dev_err(&pdev->dev, "No I/O resource\n");
ret = -EINVAL;
goto err;
}
ldo->base = res->start;
snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1);
ldo->desc.name = ldo->name;
ldo->desc.id = id;
ldo->desc.type = REGULATOR_VOLTAGE;
ldo->desc.n_voltages = WM831X_ALIVE_LDO_MAX_SELECTOR + 1;
ldo->desc.ops = &wm831x_alive_ldo_ops;
ldo->desc.owner = THIS_MODULE;
ldo->regulator = regulator_register(&ldo->desc, &pdev->dev,
pdata->ldo[id], ldo);
if (IS_ERR(ldo->regulator)) {
ret = PTR_ERR(ldo->regulator);
dev_err(wm831x->dev, "Failed to register LDO%d: %d\n",
id + 1, ret);
goto err;
}
platform_set_drvdata(pdev, ldo);
return 0;
err:
kfree(ldo);
return ret;
}
static __devexit int wm831x_alive_ldo_remove(struct platform_device *pdev)
{
struct wm831x_ldo *ldo = platform_get_drvdata(pdev);
regulator_unregister(ldo->regulator);
kfree(ldo);
return 0;
}
static struct platform_driver wm831x_alive_ldo_driver = {
.probe = wm831x_alive_ldo_probe,
.remove = __devexit_p(wm831x_alive_ldo_remove),
.driver = {
.name = "wm831x-alive-ldo",
.owner = THIS_MODULE,
},
};
static int __init wm831x_ldo_init(void)
{
int ret;
ret = platform_driver_register(&wm831x_gp_ldo_driver);
if (ret != 0)
pr_err("Failed to register WM831x GP LDO driver: %d\n", ret);
ret = platform_driver_register(&wm831x_aldo_driver);
if (ret != 0)
pr_err("Failed to register WM831x ALDO driver: %d\n", ret);
ret = platform_driver_register(&wm831x_alive_ldo_driver);
if (ret != 0)
pr_err("Failed to register WM831x alive LDO driver: %d\n",
ret);
return 0;
}
subsys_initcall(wm831x_ldo_init);
static void __exit wm831x_ldo_exit(void)
{
platform_driver_unregister(&wm831x_alive_ldo_driver);
platform_driver_unregister(&wm831x_aldo_driver);
platform_driver_unregister(&wm831x_gp_ldo_driver);
}
module_exit(wm831x_ldo_exit);
/* Module information */
MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
MODULE_DESCRIPTION("WM831x LDO driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:wm831x-ldo");
MODULE_ALIAS("platform:wm831x-aldo");
MODULE_ALIAS("platform:wm831x-aliveldo");
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