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linux/drivers/regulator/wm831x-dcdc.c
Steve Twiss 119c4f5085
regulator: wm831x: Fix notifier mutex lock warning 
The mutex for the regulator_dev must be controlled by the caller of
the regulator_notifier_call_chain(), as described in the comment
for that function.

Failure to mutex lock and unlock surrounding the notifier call results
in a kernel WARN_ON_ONCE() which will dump a backtrace for the
regulator_notifier_call_chain() when that function call is first made.
The mutex can be controlled using the regulator_lock/unlock() API.

Fixes: e4ee831f94 ("regulator: Add WM831x DC-DC buck convertor support")
Suggested-by: Adam Thomson <Adam.Thomson.Opensource@diasemi.com>
Signed-off-by: Steve Twiss <stwiss.opensource@diasemi.com>
Acked-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2019-03-13 15:10:56 +00:00

867 lines
22 KiB
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/*
* wm831x-dcdc.c -- DC-DC buck convertor 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/regulator/machine.h>
#include <linux/gpio.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_BUCKV_MAX_SELECTOR 0x68
#define WM831X_BUCKP_MAX_SELECTOR 0x66
#define WM831X_DCDC_MODE_FAST 0
#define WM831X_DCDC_MODE_NORMAL 1
#define WM831X_DCDC_MODE_IDLE 2
#define WM831X_DCDC_MODE_STANDBY 3
#define WM831X_DCDC_MAX_NAME 9
/* Register offsets in control block */
#define WM831X_DCDC_CONTROL_1 0
#define WM831X_DCDC_CONTROL_2 1
#define WM831X_DCDC_ON_CONFIG 2
#define WM831X_DCDC_SLEEP_CONTROL 3
#define WM831X_DCDC_DVS_CONTROL 4
/*
* Shared
*/
struct wm831x_dcdc {
char name[WM831X_DCDC_MAX_NAME];
char supply_name[WM831X_DCDC_MAX_NAME];
struct regulator_desc desc;
int base;
struct wm831x *wm831x;
struct regulator_dev *regulator;
int dvs_gpio;
int dvs_gpio_state;
int on_vsel;
int dvs_vsel;
};
static unsigned int wm831x_dcdc_get_mode(struct regulator_dev *rdev)
{
struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
struct wm831x *wm831x = dcdc->wm831x;
u16 reg = dcdc->base + WM831X_DCDC_ON_CONFIG;
int val;
val = wm831x_reg_read(wm831x, reg);
if (val < 0)
return val;
val = (val & WM831X_DC1_ON_MODE_MASK) >> WM831X_DC1_ON_MODE_SHIFT;
switch (val) {
case WM831X_DCDC_MODE_FAST:
return REGULATOR_MODE_FAST;
case WM831X_DCDC_MODE_NORMAL:
return REGULATOR_MODE_NORMAL;
case WM831X_DCDC_MODE_STANDBY:
return REGULATOR_MODE_STANDBY;
case WM831X_DCDC_MODE_IDLE:
return REGULATOR_MODE_IDLE;
default:
BUG();
return -EINVAL;
}
}
static int wm831x_dcdc_set_mode_int(struct wm831x *wm831x, int reg,
unsigned int mode)
{
int val;
switch (mode) {
case REGULATOR_MODE_FAST:
val = WM831X_DCDC_MODE_FAST;
break;
case REGULATOR_MODE_NORMAL:
val = WM831X_DCDC_MODE_NORMAL;
break;
case REGULATOR_MODE_STANDBY:
val = WM831X_DCDC_MODE_STANDBY;
break;
case REGULATOR_MODE_IDLE:
val = WM831X_DCDC_MODE_IDLE;
break;
default:
return -EINVAL;
}
return wm831x_set_bits(wm831x, reg, WM831X_DC1_ON_MODE_MASK,
val << WM831X_DC1_ON_MODE_SHIFT);
}
static int wm831x_dcdc_set_mode(struct regulator_dev *rdev, unsigned int mode)
{
struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
struct wm831x *wm831x = dcdc->wm831x;
u16 reg = dcdc->base + WM831X_DCDC_ON_CONFIG;
return wm831x_dcdc_set_mode_int(wm831x, reg, mode);
}
static int wm831x_dcdc_set_suspend_mode(struct regulator_dev *rdev,
unsigned int mode)
{
struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
struct wm831x *wm831x = dcdc->wm831x;
u16 reg = dcdc->base + WM831X_DCDC_SLEEP_CONTROL;
return wm831x_dcdc_set_mode_int(wm831x, reg, mode);
}
static int wm831x_dcdc_get_status(struct regulator_dev *rdev)
{
struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
struct wm831x *wm831x = dcdc->wm831x;
int ret;
/* First, check for errors */
ret = wm831x_reg_read(wm831x, WM831X_DCDC_UV_STATUS);
if (ret < 0)
return ret;
if (ret & (1 << rdev_get_id(rdev))) {
dev_dbg(wm831x->dev, "DCDC%d under voltage\n",
rdev_get_id(rdev) + 1);
return REGULATOR_STATUS_ERROR;
}
/* DCDC1 and DCDC2 can additionally detect high voltage/current */
if (rdev_get_id(rdev) < 2) {
if (ret & (WM831X_DC1_OV_STS << rdev_get_id(rdev))) {
dev_dbg(wm831x->dev, "DCDC%d over voltage\n",
rdev_get_id(rdev) + 1);
return REGULATOR_STATUS_ERROR;
}
if (ret & (WM831X_DC1_HC_STS << rdev_get_id(rdev))) {
dev_dbg(wm831x->dev, "DCDC%d over current\n",
rdev_get_id(rdev) + 1);
return REGULATOR_STATUS_ERROR;
}
}
/* Is the regulator on? */
ret = wm831x_reg_read(wm831x, WM831X_DCDC_STATUS);
if (ret < 0)
return ret;
if (!(ret & (1 << rdev_get_id(rdev))))
return REGULATOR_STATUS_OFF;
/* TODO: When we handle hardware control modes so we can report the
* current mode. */
return REGULATOR_STATUS_ON;
}
static irqreturn_t wm831x_dcdc_uv_irq(int irq, void *data)
{
struct wm831x_dcdc *dcdc = data;
regulator_lock(dcdc->regulator);
regulator_notifier_call_chain(dcdc->regulator,
REGULATOR_EVENT_UNDER_VOLTAGE,
NULL);
regulator_unlock(dcdc->regulator);
return IRQ_HANDLED;
}
static irqreturn_t wm831x_dcdc_oc_irq(int irq, void *data)
{
struct wm831x_dcdc *dcdc = data;
regulator_lock(dcdc->regulator);
regulator_notifier_call_chain(dcdc->regulator,
REGULATOR_EVENT_OVER_CURRENT,
NULL);
regulator_unlock(dcdc->regulator);
return IRQ_HANDLED;
}
/*
* BUCKV specifics
*/
static const struct regulator_linear_range wm831x_buckv_ranges[] = {
REGULATOR_LINEAR_RANGE(600000, 0, 0x7, 0),
REGULATOR_LINEAR_RANGE(600000, 0x8, 0x68, 12500),
};
static int wm831x_buckv_set_dvs(struct regulator_dev *rdev, int state)
{
struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
if (state == dcdc->dvs_gpio_state)
return 0;
dcdc->dvs_gpio_state = state;
gpio_set_value(dcdc->dvs_gpio, state);
/* Should wait for DVS state change to be asserted if we have
* a GPIO for it, for now assume the device is configured
* for the fastest possible transition.
*/
return 0;
}
static int wm831x_buckv_set_voltage_sel(struct regulator_dev *rdev,
unsigned vsel)
{
struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
struct wm831x *wm831x = dcdc->wm831x;
int on_reg = dcdc->base + WM831X_DCDC_ON_CONFIG;
int dvs_reg = dcdc->base + WM831X_DCDC_DVS_CONTROL;
int ret;
/* If this value is already set then do a GPIO update if we can */
if (dcdc->dvs_gpio && dcdc->on_vsel == vsel)
return wm831x_buckv_set_dvs(rdev, 0);
if (dcdc->dvs_gpio && dcdc->dvs_vsel == vsel)
return wm831x_buckv_set_dvs(rdev, 1);
/* Always set the ON status to the minimum voltage */
ret = wm831x_set_bits(wm831x, on_reg, WM831X_DC1_ON_VSEL_MASK, vsel);
if (ret < 0)
return ret;
dcdc->on_vsel = vsel;
if (!dcdc->dvs_gpio)
return ret;
/* Kick the voltage transition now */
ret = wm831x_buckv_set_dvs(rdev, 0);
if (ret < 0)
return ret;
/*
* If this VSEL is higher than the last one we've seen then
* remember it as the DVS VSEL. This is optimised for CPUfreq
* usage where we want to get to the highest voltage very
* quickly.
*/
if (vsel > dcdc->dvs_vsel) {
ret = wm831x_set_bits(wm831x, dvs_reg,
WM831X_DC1_DVS_VSEL_MASK,
vsel);
if (ret == 0)
dcdc->dvs_vsel = vsel;
else
dev_warn(wm831x->dev,
"Failed to set DCDC DVS VSEL: %d\n", ret);
}
return 0;
}
static int wm831x_buckv_set_suspend_voltage(struct regulator_dev *rdev,
int uV)
{
struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
struct wm831x *wm831x = dcdc->wm831x;
u16 reg = dcdc->base + WM831X_DCDC_SLEEP_CONTROL;
int vsel;
vsel = regulator_map_voltage_linear_range(rdev, uV, uV);
if (vsel < 0)
return vsel;
return wm831x_set_bits(wm831x, reg, WM831X_DC1_SLP_VSEL_MASK, vsel);
}
static int wm831x_buckv_get_voltage_sel(struct regulator_dev *rdev)
{
struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
if (dcdc->dvs_gpio && dcdc->dvs_gpio_state)
return dcdc->dvs_vsel;
else
return dcdc->on_vsel;
}
/* Current limit options */
static const unsigned int wm831x_dcdc_ilim[] = {
125000, 250000, 375000, 500000, 625000, 750000, 875000, 1000000
};
static const struct regulator_ops wm831x_buckv_ops = {
.set_voltage_sel = wm831x_buckv_set_voltage_sel,
.get_voltage_sel = wm831x_buckv_get_voltage_sel,
.list_voltage = regulator_list_voltage_linear_range,
.map_voltage = regulator_map_voltage_linear_range,
.set_suspend_voltage = wm831x_buckv_set_suspend_voltage,
.set_current_limit = regulator_set_current_limit_regmap,
.get_current_limit = regulator_get_current_limit_regmap,
.is_enabled = regulator_is_enabled_regmap,
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.get_status = wm831x_dcdc_get_status,
.get_mode = wm831x_dcdc_get_mode,
.set_mode = wm831x_dcdc_set_mode,
.set_suspend_mode = wm831x_dcdc_set_suspend_mode,
};
/*
* Set up DVS control. We just log errors since we can still run
* (with reduced performance) if we fail.
*/
static void wm831x_buckv_dvs_init(struct platform_device *pdev,
struct wm831x_dcdc *dcdc,
struct wm831x_buckv_pdata *pdata)
{
struct wm831x *wm831x = dcdc->wm831x;
int ret;
u16 ctrl;
if (!pdata || !pdata->dvs_gpio)
return;
/* gpiolib won't let us read the GPIO status so pick the higher
* of the two existing voltages so we take it as platform data.
*/
dcdc->dvs_gpio_state = pdata->dvs_init_state;
ret = devm_gpio_request_one(&pdev->dev, pdata->dvs_gpio,
dcdc->dvs_gpio_state ? GPIOF_INIT_HIGH : 0,
"DCDC DVS");
if (ret < 0) {
dev_err(wm831x->dev, "Failed to get %s DVS GPIO: %d\n",
dcdc->name, ret);
return;
}
dcdc->dvs_gpio = pdata->dvs_gpio;
switch (pdata->dvs_control_src) {
case 1:
ctrl = 2 << WM831X_DC1_DVS_SRC_SHIFT;
break;
case 2:
ctrl = 3 << WM831X_DC1_DVS_SRC_SHIFT;
break;
default:
dev_err(wm831x->dev, "Invalid DVS control source %d for %s\n",
pdata->dvs_control_src, dcdc->name);
return;
}
/* If DVS_VSEL is set to the minimum value then raise it to ON_VSEL
* to make bootstrapping a bit smoother.
*/
if (!dcdc->dvs_vsel) {
ret = wm831x_set_bits(wm831x,
dcdc->base + WM831X_DCDC_DVS_CONTROL,
WM831X_DC1_DVS_VSEL_MASK, dcdc->on_vsel);
if (ret == 0)
dcdc->dvs_vsel = dcdc->on_vsel;
else
dev_warn(wm831x->dev, "Failed to set DVS_VSEL: %d\n",
ret);
}
ret = wm831x_set_bits(wm831x, dcdc->base + WM831X_DCDC_DVS_CONTROL,
WM831X_DC1_DVS_SRC_MASK, ctrl);
if (ret < 0) {
dev_err(wm831x->dev, "Failed to set %s DVS source: %d\n",
dcdc->name, ret);
}
}
static int wm831x_buckv_probe(struct platform_device *pdev)
{
struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
struct wm831x_pdata *pdata = dev_get_platdata(wm831x->dev);
struct regulator_config config = { };
int id;
struct wm831x_dcdc *dcdc;
struct resource *res;
int ret, irq;
if (pdata && pdata->wm831x_num)
id = (pdata->wm831x_num * 10) + 1;
else
id = 0;
id = pdev->id - id;
dev_dbg(&pdev->dev, "Probing DCDC%d\n", id + 1);
dcdc = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_dcdc),
GFP_KERNEL);
if (!dcdc)
return -ENOMEM;
dcdc->wm831x = wm831x;
res = platform_get_resource(pdev, IORESOURCE_REG, 0);
if (res == NULL) {
dev_err(&pdev->dev, "No REG resource\n");
ret = -EINVAL;
goto err;
}
dcdc->base = res->start;
snprintf(dcdc->name, sizeof(dcdc->name), "DCDC%d", id + 1);
dcdc->desc.name = dcdc->name;
snprintf(dcdc->supply_name, sizeof(dcdc->supply_name),
"DC%dVDD", id + 1);
dcdc->desc.supply_name = dcdc->supply_name;
dcdc->desc.id = id;
dcdc->desc.type = REGULATOR_VOLTAGE;
dcdc->desc.n_voltages = WM831X_BUCKV_MAX_SELECTOR + 1;
dcdc->desc.linear_ranges = wm831x_buckv_ranges;
dcdc->desc.n_linear_ranges = ARRAY_SIZE(wm831x_buckv_ranges);
dcdc->desc.ops = &wm831x_buckv_ops;
dcdc->desc.owner = THIS_MODULE;
dcdc->desc.enable_reg = WM831X_DCDC_ENABLE;
dcdc->desc.enable_mask = 1 << id;
dcdc->desc.csel_reg = dcdc->base + WM831X_DCDC_CONTROL_2;
dcdc->desc.csel_mask = WM831X_DC1_HC_THR_MASK;
dcdc->desc.n_current_limits = ARRAY_SIZE(wm831x_dcdc_ilim);
dcdc->desc.curr_table = wm831x_dcdc_ilim;
ret = wm831x_reg_read(wm831x, dcdc->base + WM831X_DCDC_ON_CONFIG);
if (ret < 0) {
dev_err(wm831x->dev, "Failed to read ON VSEL: %d\n", ret);
goto err;
}
dcdc->on_vsel = ret & WM831X_DC1_ON_VSEL_MASK;
ret = wm831x_reg_read(wm831x, dcdc->base + WM831X_DCDC_DVS_CONTROL);
if (ret < 0) {
dev_err(wm831x->dev, "Failed to read DVS VSEL: %d\n", ret);
goto err;
}
dcdc->dvs_vsel = ret & WM831X_DC1_DVS_VSEL_MASK;
if (pdata && pdata->dcdc[id])
wm831x_buckv_dvs_init(pdev, dcdc,
pdata->dcdc[id]->driver_data);
config.dev = pdev->dev.parent;
if (pdata)
config.init_data = pdata->dcdc[id];
config.driver_data = dcdc;
config.regmap = wm831x->regmap;
dcdc->regulator = devm_regulator_register(&pdev->dev, &dcdc->desc,
&config);
if (IS_ERR(dcdc->regulator)) {
ret = PTR_ERR(dcdc->regulator);
dev_err(wm831x->dev, "Failed to register DCDC%d: %d\n",
id + 1, ret);
goto err;
}
irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "UV"));
ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
wm831x_dcdc_uv_irq,
IRQF_TRIGGER_RISING | IRQF_ONESHOT,
dcdc->name, dcdc);
if (ret != 0) {
dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n",
irq, ret);
goto err;
}
irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "HC"));
ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
wm831x_dcdc_oc_irq,
IRQF_TRIGGER_RISING | IRQF_ONESHOT,
dcdc->name, dcdc);
if (ret != 0) {
dev_err(&pdev->dev, "Failed to request HC IRQ %d: %d\n",
irq, ret);
goto err;
}
platform_set_drvdata(pdev, dcdc);
return 0;
err:
return ret;
}
static struct platform_driver wm831x_buckv_driver = {
.probe = wm831x_buckv_probe,
.driver = {
.name = "wm831x-buckv",
},
};
/*
* BUCKP specifics
*/
static int wm831x_buckp_set_suspend_voltage(struct regulator_dev *rdev, int uV)
{
struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
struct wm831x *wm831x = dcdc->wm831x;
u16 reg = dcdc->base + WM831X_DCDC_SLEEP_CONTROL;
int sel;
sel = regulator_map_voltage_linear(rdev, uV, uV);
if (sel < 0)
return sel;
return wm831x_set_bits(wm831x, reg, WM831X_DC3_ON_VSEL_MASK, sel);
}
static const struct regulator_ops wm831x_buckp_ops = {
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.list_voltage = regulator_list_voltage_linear,
.map_voltage = regulator_map_voltage_linear,
.set_suspend_voltage = wm831x_buckp_set_suspend_voltage,
.is_enabled = regulator_is_enabled_regmap,
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.get_status = wm831x_dcdc_get_status,
.get_mode = wm831x_dcdc_get_mode,
.set_mode = wm831x_dcdc_set_mode,
.set_suspend_mode = wm831x_dcdc_set_suspend_mode,
};
static int wm831x_buckp_probe(struct platform_device *pdev)
{
struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
struct wm831x_pdata *pdata = dev_get_platdata(wm831x->dev);
struct regulator_config config = { };
int id;
struct wm831x_dcdc *dcdc;
struct resource *res;
int ret, irq;
if (pdata && pdata->wm831x_num)
id = (pdata->wm831x_num * 10) + 1;
else
id = 0;
id = pdev->id - id;
dev_dbg(&pdev->dev, "Probing DCDC%d\n", id + 1);
dcdc = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_dcdc),
GFP_KERNEL);
if (!dcdc)
return -ENOMEM;
dcdc->wm831x = wm831x;
res = platform_get_resource(pdev, IORESOURCE_REG, 0);
if (res == NULL) {
dev_err(&pdev->dev, "No REG resource\n");
ret = -EINVAL;
goto err;
}
dcdc->base = res->start;
snprintf(dcdc->name, sizeof(dcdc->name), "DCDC%d", id + 1);
dcdc->desc.name = dcdc->name;
snprintf(dcdc->supply_name, sizeof(dcdc->supply_name),
"DC%dVDD", id + 1);
dcdc->desc.supply_name = dcdc->supply_name;
dcdc->desc.id = id;
dcdc->desc.type = REGULATOR_VOLTAGE;
dcdc->desc.n_voltages = WM831X_BUCKP_MAX_SELECTOR + 1;
dcdc->desc.ops = &wm831x_buckp_ops;
dcdc->desc.owner = THIS_MODULE;
dcdc->desc.vsel_reg = dcdc->base + WM831X_DCDC_ON_CONFIG;
dcdc->desc.vsel_mask = WM831X_DC3_ON_VSEL_MASK;
dcdc->desc.enable_reg = WM831X_DCDC_ENABLE;
dcdc->desc.enable_mask = 1 << id;
dcdc->desc.min_uV = 850000;
dcdc->desc.uV_step = 25000;
config.dev = pdev->dev.parent;
if (pdata)
config.init_data = pdata->dcdc[id];
config.driver_data = dcdc;
config.regmap = wm831x->regmap;
dcdc->regulator = devm_regulator_register(&pdev->dev, &dcdc->desc,
&config);
if (IS_ERR(dcdc->regulator)) {
ret = PTR_ERR(dcdc->regulator);
dev_err(wm831x->dev, "Failed to register DCDC%d: %d\n",
id + 1, ret);
goto err;
}
irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "UV"));
ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
wm831x_dcdc_uv_irq,
IRQF_TRIGGER_RISING | IRQF_ONESHOT,
dcdc->name, dcdc);
if (ret != 0) {
dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n",
irq, ret);
goto err;
}
platform_set_drvdata(pdev, dcdc);
return 0;
err:
return ret;
}
static struct platform_driver wm831x_buckp_driver = {
.probe = wm831x_buckp_probe,
.driver = {
.name = "wm831x-buckp",
},
};
/*
* DCDC boost convertors
*/
static int wm831x_boostp_get_status(struct regulator_dev *rdev)
{
struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
struct wm831x *wm831x = dcdc->wm831x;
int ret;
/* First, check for errors */
ret = wm831x_reg_read(wm831x, WM831X_DCDC_UV_STATUS);
if (ret < 0)
return ret;
if (ret & (1 << rdev_get_id(rdev))) {
dev_dbg(wm831x->dev, "DCDC%d under voltage\n",
rdev_get_id(rdev) + 1);
return REGULATOR_STATUS_ERROR;
}
/* Is the regulator on? */
ret = wm831x_reg_read(wm831x, WM831X_DCDC_STATUS);
if (ret < 0)
return ret;
if (ret & (1 << rdev_get_id(rdev)))
return REGULATOR_STATUS_ON;
else
return REGULATOR_STATUS_OFF;
}
static const struct regulator_ops wm831x_boostp_ops = {
.get_status = wm831x_boostp_get_status,
.is_enabled = regulator_is_enabled_regmap,
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
};
static int wm831x_boostp_probe(struct platform_device *pdev)
{
struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
struct wm831x_pdata *pdata = dev_get_platdata(wm831x->dev);
struct regulator_config config = { };
int id = pdev->id % ARRAY_SIZE(pdata->dcdc);
struct wm831x_dcdc *dcdc;
struct resource *res;
int ret, irq;
dev_dbg(&pdev->dev, "Probing DCDC%d\n", id + 1);
if (pdata == NULL || pdata->dcdc[id] == NULL)
return -ENODEV;
dcdc = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_dcdc), GFP_KERNEL);
if (!dcdc)
return -ENOMEM;
dcdc->wm831x = wm831x;
res = platform_get_resource(pdev, IORESOURCE_REG, 0);
if (res == NULL) {
dev_err(&pdev->dev, "No REG resource\n");
return -EINVAL;
}
dcdc->base = res->start;
snprintf(dcdc->name, sizeof(dcdc->name), "DCDC%d", id + 1);
dcdc->desc.name = dcdc->name;
dcdc->desc.id = id;
dcdc->desc.type = REGULATOR_VOLTAGE;
dcdc->desc.ops = &wm831x_boostp_ops;
dcdc->desc.owner = THIS_MODULE;
dcdc->desc.enable_reg = WM831X_DCDC_ENABLE;
dcdc->desc.enable_mask = 1 << id;
config.dev = pdev->dev.parent;
if (pdata)
config.init_data = pdata->dcdc[id];
config.driver_data = dcdc;
config.regmap = wm831x->regmap;
dcdc->regulator = devm_regulator_register(&pdev->dev, &dcdc->desc,
&config);
if (IS_ERR(dcdc->regulator)) {
ret = PTR_ERR(dcdc->regulator);
dev_err(wm831x->dev, "Failed to register DCDC%d: %d\n",
id + 1, ret);
return ret;
}
irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "UV"));
ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
wm831x_dcdc_uv_irq,
IRQF_TRIGGER_RISING | IRQF_ONESHOT,
dcdc->name,
dcdc);
if (ret != 0) {
dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n",
irq, ret);
return ret;
}
platform_set_drvdata(pdev, dcdc);
return 0;
}
static struct platform_driver wm831x_boostp_driver = {
.probe = wm831x_boostp_probe,
.driver = {
.name = "wm831x-boostp",
},
};
/*
* External Power Enable
*
* These aren't actually DCDCs but look like them in hardware so share
* code.
*/
#define WM831X_EPE_BASE 6
static const struct regulator_ops wm831x_epe_ops = {
.is_enabled = regulator_is_enabled_regmap,
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.get_status = wm831x_dcdc_get_status,
};
static int wm831x_epe_probe(struct platform_device *pdev)
{
struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
struct wm831x_pdata *pdata = dev_get_platdata(wm831x->dev);
struct regulator_config config = { };
int id = pdev->id % ARRAY_SIZE(pdata->epe);
struct wm831x_dcdc *dcdc;
int ret;
dev_dbg(&pdev->dev, "Probing EPE%d\n", id + 1);
dcdc = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_dcdc), GFP_KERNEL);
if (!dcdc)
return -ENOMEM;
dcdc->wm831x = wm831x;
/* For current parts this is correct; probably need to revisit
* in future.
*/
snprintf(dcdc->name, sizeof(dcdc->name), "EPE%d", id + 1);
dcdc->desc.name = dcdc->name;
dcdc->desc.id = id + WM831X_EPE_BASE; /* Offset in DCDC registers */
dcdc->desc.ops = &wm831x_epe_ops;
dcdc->desc.type = REGULATOR_VOLTAGE;
dcdc->desc.owner = THIS_MODULE;
dcdc->desc.enable_reg = WM831X_DCDC_ENABLE;
dcdc->desc.enable_mask = 1 << dcdc->desc.id;
config.dev = pdev->dev.parent;
if (pdata)
config.init_data = pdata->epe[id];
config.driver_data = dcdc;
config.regmap = wm831x->regmap;
dcdc->regulator = devm_regulator_register(&pdev->dev, &dcdc->desc,
&config);
if (IS_ERR(dcdc->regulator)) {
ret = PTR_ERR(dcdc->regulator);
dev_err(wm831x->dev, "Failed to register EPE%d: %d\n",
id + 1, ret);
goto err;
}
platform_set_drvdata(pdev, dcdc);
return 0;
err:
return ret;
}
static struct platform_driver wm831x_epe_driver = {
.probe = wm831x_epe_probe,
.driver = {
.name = "wm831x-epe",
},
};
static struct platform_driver * const drivers[] = {
&wm831x_buckv_driver,
&wm831x_buckp_driver,
&wm831x_boostp_driver,
&wm831x_epe_driver,
};
static int __init wm831x_dcdc_init(void)
{
return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
}
subsys_initcall(wm831x_dcdc_init);
static void __exit wm831x_dcdc_exit(void)
{
platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
}
module_exit(wm831x_dcdc_exit);
/* Module information */
MODULE_AUTHOR("Mark Brown");
MODULE_DESCRIPTION("WM831x DC-DC convertor driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:wm831x-buckv");
MODULE_ALIAS("platform:wm831x-buckp");
MODULE_ALIAS("platform:wm831x-boostp");
MODULE_ALIAS("platform:wm831x-epe");
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