2014-09-28 09:28:53 +07:00
|
|
|
/*
|
|
|
|
* Regulator driver for PWM Regulators
|
|
|
|
*
|
|
|
|
* Copyright (C) 2014 - STMicroelectronics Inc.
|
|
|
|
*
|
|
|
|
* Author: Lee Jones <lee.jones@linaro.org>
|
|
|
|
*
|
|
|
|
* This program is free software; you can redistribute it and/or modify
|
|
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
|
|
* published by the Free Software Foundation.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include <linux/module.h>
|
|
|
|
#include <linux/init.h>
|
|
|
|
#include <linux/err.h>
|
|
|
|
#include <linux/regulator/driver.h>
|
|
|
|
#include <linux/regulator/machine.h>
|
|
|
|
#include <linux/regulator/of_regulator.h>
|
|
|
|
#include <linux/of.h>
|
|
|
|
#include <linux/of_device.h>
|
|
|
|
#include <linux/pwm.h>
|
2016-06-23 14:39:44 +07:00
|
|
|
#include <linux/gpio/consumer.h>
|
2014-09-28 09:28:53 +07:00
|
|
|
|
2016-06-14 16:13:21 +07:00
|
|
|
struct pwm_continuous_reg_data {
|
|
|
|
unsigned int min_uV_dutycycle;
|
|
|
|
unsigned int max_uV_dutycycle;
|
|
|
|
unsigned int dutycycle_unit;
|
|
|
|
};
|
|
|
|
|
2014-09-28 09:28:53 +07:00
|
|
|
struct pwm_regulator_data {
|
2015-07-07 22:06:51 +07:00
|
|
|
/* Shared */
|
2014-09-28 09:28:53 +07:00
|
|
|
struct pwm_device *pwm;
|
2015-07-07 22:06:51 +07:00
|
|
|
|
|
|
|
/* Voltage table */
|
|
|
|
struct pwm_voltages *duty_cycle_table;
|
2016-03-08 17:53:22 +07:00
|
|
|
|
2016-06-14 16:13:21 +07:00
|
|
|
/* Continuous mode info */
|
|
|
|
struct pwm_continuous_reg_data continuous;
|
|
|
|
|
2016-03-08 17:53:22 +07:00
|
|
|
/* regulator descriptor */
|
|
|
|
struct regulator_desc desc;
|
|
|
|
|
|
|
|
/* Regulator ops */
|
|
|
|
struct regulator_ops ops;
|
|
|
|
|
2014-09-28 09:28:53 +07:00
|
|
|
int state;
|
2015-07-07 22:06:51 +07:00
|
|
|
|
2016-06-23 14:39:44 +07:00
|
|
|
/* Enable GPIO */
|
|
|
|
struct gpio_desc *enb_gpio;
|
2014-09-28 09:28:53 +07:00
|
|
|
};
|
|
|
|
|
|
|
|
struct pwm_voltages {
|
|
|
|
unsigned int uV;
|
|
|
|
unsigned int dutycycle;
|
|
|
|
};
|
|
|
|
|
2015-07-07 22:06:51 +07:00
|
|
|
/**
|
|
|
|
* Voltage table call-backs
|
|
|
|
*/
|
2016-06-14 16:13:19 +07:00
|
|
|
static void pwm_regulator_init_state(struct regulator_dev *rdev)
|
|
|
|
{
|
|
|
|
struct pwm_regulator_data *drvdata = rdev_get_drvdata(rdev);
|
|
|
|
struct pwm_state pwm_state;
|
|
|
|
unsigned int dutycycle;
|
|
|
|
int i;
|
|
|
|
|
|
|
|
pwm_get_state(drvdata->pwm, &pwm_state);
|
|
|
|
dutycycle = pwm_get_relative_duty_cycle(&pwm_state, 100);
|
|
|
|
|
|
|
|
for (i = 0; i < rdev->desc->n_voltages; i++) {
|
|
|
|
if (dutycycle == drvdata->duty_cycle_table[i].dutycycle) {
|
|
|
|
drvdata->state = i;
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2015-06-06 01:42:47 +07:00
|
|
|
static int pwm_regulator_get_voltage_sel(struct regulator_dev *rdev)
|
2014-09-28 09:28:53 +07:00
|
|
|
{
|
2015-06-06 01:42:47 +07:00
|
|
|
struct pwm_regulator_data *drvdata = rdev_get_drvdata(rdev);
|
2014-09-28 09:28:53 +07:00
|
|
|
|
2016-06-14 16:13:19 +07:00
|
|
|
if (drvdata->state < 0)
|
|
|
|
pwm_regulator_init_state(rdev);
|
|
|
|
|
2014-09-28 09:28:53 +07:00
|
|
|
return drvdata->state;
|
|
|
|
}
|
|
|
|
|
2015-06-06 01:42:47 +07:00
|
|
|
static int pwm_regulator_set_voltage_sel(struct regulator_dev *rdev,
|
2014-09-28 09:28:53 +07:00
|
|
|
unsigned selector)
|
|
|
|
{
|
2015-06-06 01:42:47 +07:00
|
|
|
struct pwm_regulator_data *drvdata = rdev_get_drvdata(rdev);
|
2016-06-14 16:13:18 +07:00
|
|
|
struct pwm_state pstate;
|
2014-09-28 09:28:53 +07:00
|
|
|
int ret;
|
|
|
|
|
2016-06-14 16:13:18 +07:00
|
|
|
pwm_init_state(drvdata->pwm, &pstate);
|
|
|
|
pwm_set_relative_duty_cycle(&pstate,
|
|
|
|
drvdata->duty_cycle_table[selector].dutycycle, 100);
|
2014-09-28 09:28:53 +07:00
|
|
|
|
2016-06-14 16:13:18 +07:00
|
|
|
ret = pwm_apply_state(drvdata->pwm, &pstate);
|
2014-09-28 09:28:53 +07:00
|
|
|
if (ret) {
|
2016-03-14 19:50:13 +07:00
|
|
|
dev_err(&rdev->dev, "Failed to configure PWM: %d\n", ret);
|
2014-09-28 09:28:53 +07:00
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
drvdata->state = selector;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2015-06-06 01:42:47 +07:00
|
|
|
static int pwm_regulator_list_voltage(struct regulator_dev *rdev,
|
2014-09-28 09:28:53 +07:00
|
|
|
unsigned selector)
|
|
|
|
{
|
2015-06-06 01:42:47 +07:00
|
|
|
struct pwm_regulator_data *drvdata = rdev_get_drvdata(rdev);
|
2014-09-28 09:28:53 +07:00
|
|
|
|
2015-06-06 01:42:47 +07:00
|
|
|
if (selector >= rdev->desc->n_voltages)
|
2014-09-28 09:28:53 +07:00
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
return drvdata->duty_cycle_table[selector].uV;
|
|
|
|
}
|
2015-07-07 22:06:51 +07:00
|
|
|
|
2015-09-21 16:33:28 +07:00
|
|
|
static int pwm_regulator_enable(struct regulator_dev *dev)
|
|
|
|
{
|
|
|
|
struct pwm_regulator_data *drvdata = rdev_get_drvdata(dev);
|
|
|
|
|
2017-07-24 09:10:48 +07:00
|
|
|
gpiod_set_value_cansleep(drvdata->enb_gpio, 1);
|
2016-06-23 14:39:44 +07:00
|
|
|
|
2015-09-21 16:33:28 +07:00
|
|
|
return pwm_enable(drvdata->pwm);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int pwm_regulator_disable(struct regulator_dev *dev)
|
|
|
|
{
|
|
|
|
struct pwm_regulator_data *drvdata = rdev_get_drvdata(dev);
|
|
|
|
|
|
|
|
pwm_disable(drvdata->pwm);
|
|
|
|
|
2017-07-24 09:10:48 +07:00
|
|
|
gpiod_set_value_cansleep(drvdata->enb_gpio, 0);
|
2016-06-23 14:39:44 +07:00
|
|
|
|
2015-09-21 16:33:28 +07:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int pwm_regulator_is_enabled(struct regulator_dev *dev)
|
|
|
|
{
|
|
|
|
struct pwm_regulator_data *drvdata = rdev_get_drvdata(dev);
|
|
|
|
|
2016-06-23 14:39:44 +07:00
|
|
|
if (drvdata->enb_gpio && !gpiod_get_value_cansleep(drvdata->enb_gpio))
|
|
|
|
return false;
|
|
|
|
|
2015-09-21 16:33:28 +07:00
|
|
|
return pwm_is_enabled(drvdata->pwm);
|
|
|
|
}
|
|
|
|
|
2015-07-07 22:06:51 +07:00
|
|
|
static int pwm_regulator_get_voltage(struct regulator_dev *rdev)
|
|
|
|
{
|
|
|
|
struct pwm_regulator_data *drvdata = rdev_get_drvdata(rdev);
|
2016-06-14 16:13:21 +07:00
|
|
|
unsigned int min_uV_duty = drvdata->continuous.min_uV_dutycycle;
|
|
|
|
unsigned int max_uV_duty = drvdata->continuous.max_uV_dutycycle;
|
|
|
|
unsigned int duty_unit = drvdata->continuous.dutycycle_unit;
|
2016-06-14 16:13:20 +07:00
|
|
|
int min_uV = rdev->constraints->min_uV;
|
2016-06-14 16:13:21 +07:00
|
|
|
int max_uV = rdev->constraints->max_uV;
|
|
|
|
int diff_uV = max_uV - min_uV;
|
2016-06-14 16:13:20 +07:00
|
|
|
struct pwm_state pstate;
|
2016-06-14 16:13:21 +07:00
|
|
|
unsigned int diff_duty;
|
|
|
|
unsigned int voltage;
|
2015-07-07 22:06:51 +07:00
|
|
|
|
2016-06-14 16:13:20 +07:00
|
|
|
pwm_get_state(drvdata->pwm, &pstate);
|
|
|
|
|
2016-06-14 16:13:21 +07:00
|
|
|
voltage = pwm_get_relative_duty_cycle(&pstate, duty_unit);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* The dutycycle for min_uV might be greater than the one for max_uV.
|
|
|
|
* This is happening when the user needs an inversed polarity, but the
|
|
|
|
* PWM device does not support inversing it in hardware.
|
|
|
|
*/
|
|
|
|
if (max_uV_duty < min_uV_duty) {
|
|
|
|
voltage = min_uV_duty - voltage;
|
|
|
|
diff_duty = min_uV_duty - max_uV_duty;
|
|
|
|
} else {
|
|
|
|
voltage = voltage - min_uV_duty;
|
|
|
|
diff_duty = max_uV_duty - min_uV_duty;
|
|
|
|
}
|
|
|
|
|
|
|
|
voltage = DIV_ROUND_CLOSEST_ULL((u64)voltage * diff_uV, diff_duty);
|
|
|
|
|
|
|
|
return voltage + min_uV;
|
2015-07-07 22:06:51 +07:00
|
|
|
}
|
|
|
|
|
|
|
|
static int pwm_regulator_set_voltage(struct regulator_dev *rdev,
|
2016-06-14 16:13:21 +07:00
|
|
|
int req_min_uV, int req_max_uV,
|
|
|
|
unsigned int *selector)
|
2015-07-07 22:06:51 +07:00
|
|
|
{
|
|
|
|
struct pwm_regulator_data *drvdata = rdev_get_drvdata(rdev);
|
2016-06-14 16:13:21 +07:00
|
|
|
unsigned int min_uV_duty = drvdata->continuous.min_uV_dutycycle;
|
|
|
|
unsigned int max_uV_duty = drvdata->continuous.max_uV_dutycycle;
|
|
|
|
unsigned int duty_unit = drvdata->continuous.dutycycle_unit;
|
|
|
|
int min_uV = rdev->constraints->min_uV;
|
|
|
|
int max_uV = rdev->constraints->max_uV;
|
|
|
|
int diff_uV = max_uV - min_uV;
|
2016-06-14 16:13:18 +07:00
|
|
|
struct pwm_state pstate;
|
2016-06-14 16:13:21 +07:00
|
|
|
unsigned int diff_duty;
|
|
|
|
unsigned int dutycycle;
|
2015-07-07 22:06:51 +07:00
|
|
|
int ret;
|
|
|
|
|
2016-06-14 16:13:18 +07:00
|
|
|
pwm_init_state(drvdata->pwm, &pstate);
|
2016-04-05 16:39:48 +07:00
|
|
|
|
2016-06-14 16:13:21 +07:00
|
|
|
/*
|
|
|
|
* The dutycycle for min_uV might be greater than the one for max_uV.
|
|
|
|
* This is happening when the user needs an inversed polarity, but the
|
|
|
|
* PWM device does not support inversing it in hardware.
|
|
|
|
*/
|
|
|
|
if (max_uV_duty < min_uV_duty)
|
|
|
|
diff_duty = min_uV_duty - max_uV_duty;
|
|
|
|
else
|
|
|
|
diff_duty = max_uV_duty - min_uV_duty;
|
|
|
|
|
|
|
|
dutycycle = DIV_ROUND_CLOSEST_ULL((u64)(req_min_uV - min_uV) *
|
|
|
|
diff_duty,
|
|
|
|
diff_uV);
|
|
|
|
|
|
|
|
if (max_uV_duty < min_uV_duty)
|
|
|
|
dutycycle = min_uV_duty - dutycycle;
|
|
|
|
else
|
|
|
|
dutycycle = min_uV_duty + dutycycle;
|
|
|
|
|
|
|
|
pwm_set_relative_duty_cycle(&pstate, dutycycle, duty_unit);
|
2015-07-07 22:06:51 +07:00
|
|
|
|
2016-06-14 16:13:18 +07:00
|
|
|
ret = pwm_apply_state(drvdata->pwm, &pstate);
|
2015-07-07 22:06:51 +07:00
|
|
|
if (ret) {
|
2016-03-14 19:50:13 +07:00
|
|
|
dev_err(&rdev->dev, "Failed to configure PWM: %d\n", ret);
|
2015-07-07 22:06:51 +07:00
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2015-07-06 15:58:29 +07:00
|
|
|
static struct regulator_ops pwm_regulator_voltage_table_ops = {
|
2014-09-28 09:28:53 +07:00
|
|
|
.set_voltage_sel = pwm_regulator_set_voltage_sel,
|
|
|
|
.get_voltage_sel = pwm_regulator_get_voltage_sel,
|
|
|
|
.list_voltage = pwm_regulator_list_voltage,
|
|
|
|
.map_voltage = regulator_map_voltage_iterate,
|
2015-09-21 16:33:28 +07:00
|
|
|
.enable = pwm_regulator_enable,
|
|
|
|
.disable = pwm_regulator_disable,
|
|
|
|
.is_enabled = pwm_regulator_is_enabled,
|
2014-09-28 09:28:53 +07:00
|
|
|
};
|
|
|
|
|
2015-07-07 22:06:51 +07:00
|
|
|
static struct regulator_ops pwm_regulator_voltage_continuous_ops = {
|
|
|
|
.get_voltage = pwm_regulator_get_voltage,
|
|
|
|
.set_voltage = pwm_regulator_set_voltage,
|
2015-09-21 16:33:28 +07:00
|
|
|
.enable = pwm_regulator_enable,
|
|
|
|
.disable = pwm_regulator_disable,
|
|
|
|
.is_enabled = pwm_regulator_is_enabled,
|
2015-07-07 22:06:51 +07:00
|
|
|
};
|
|
|
|
|
2015-06-06 01:42:45 +07:00
|
|
|
static struct regulator_desc pwm_regulator_desc = {
|
2014-09-28 09:28:53 +07:00
|
|
|
.name = "pwm-regulator",
|
|
|
|
.type = REGULATOR_VOLTAGE,
|
|
|
|
.owner = THIS_MODULE,
|
|
|
|
.supply_name = "pwm",
|
|
|
|
};
|
|
|
|
|
2015-07-06 15:58:29 +07:00
|
|
|
static int pwm_regulator_init_table(struct platform_device *pdev,
|
|
|
|
struct pwm_regulator_data *drvdata)
|
|
|
|
{
|
|
|
|
struct device_node *np = pdev->dev.of_node;
|
|
|
|
struct pwm_voltages *duty_cycle_table;
|
2015-07-10 14:45:36 +07:00
|
|
|
unsigned int length = 0;
|
2015-07-06 15:58:29 +07:00
|
|
|
int ret;
|
|
|
|
|
|
|
|
of_find_property(np, "voltage-table", &length);
|
|
|
|
|
|
|
|
if ((length < sizeof(*duty_cycle_table)) ||
|
|
|
|
(length % sizeof(*duty_cycle_table))) {
|
2016-03-14 19:50:13 +07:00
|
|
|
dev_err(&pdev->dev, "voltage-table length(%d) is invalid\n",
|
2015-07-06 15:58:29 +07:00
|
|
|
length);
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
duty_cycle_table = devm_kzalloc(&pdev->dev, length, GFP_KERNEL);
|
|
|
|
if (!duty_cycle_table)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
ret = of_property_read_u32_array(np, "voltage-table",
|
|
|
|
(u32 *)duty_cycle_table,
|
|
|
|
length / sizeof(u32));
|
|
|
|
if (ret) {
|
2016-03-14 19:50:13 +07:00
|
|
|
dev_err(&pdev->dev, "Failed to read voltage-table: %d\n", ret);
|
2015-07-06 15:58:29 +07:00
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2016-06-14 16:13:19 +07:00
|
|
|
drvdata->state = -EINVAL;
|
2015-07-06 15:58:29 +07:00
|
|
|
drvdata->duty_cycle_table = duty_cycle_table;
|
2016-03-08 17:53:22 +07:00
|
|
|
memcpy(&drvdata->ops, &pwm_regulator_voltage_table_ops,
|
|
|
|
sizeof(drvdata->ops));
|
|
|
|
drvdata->desc.ops = &drvdata->ops;
|
|
|
|
drvdata->desc.n_voltages = length / sizeof(*duty_cycle_table);
|
2015-07-06 15:58:29 +07:00
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2015-07-07 22:06:51 +07:00
|
|
|
static int pwm_regulator_init_continuous(struct platform_device *pdev,
|
|
|
|
struct pwm_regulator_data *drvdata)
|
|
|
|
{
|
2016-06-14 16:13:21 +07:00
|
|
|
u32 dutycycle_range[2] = { 0, 100 };
|
|
|
|
u32 dutycycle_unit = 100;
|
|
|
|
|
2016-03-08 17:53:22 +07:00
|
|
|
memcpy(&drvdata->ops, &pwm_regulator_voltage_continuous_ops,
|
|
|
|
sizeof(drvdata->ops));
|
|
|
|
drvdata->desc.ops = &drvdata->ops;
|
|
|
|
drvdata->desc.continuous_voltage_range = true;
|
2015-07-07 22:06:51 +07:00
|
|
|
|
2016-06-14 16:13:21 +07:00
|
|
|
of_property_read_u32_array(pdev->dev.of_node,
|
|
|
|
"pwm-dutycycle-range",
|
|
|
|
dutycycle_range, 2);
|
|
|
|
of_property_read_u32(pdev->dev.of_node, "pwm-dutycycle-unit",
|
|
|
|
&dutycycle_unit);
|
|
|
|
|
|
|
|
if (dutycycle_range[0] > dutycycle_unit ||
|
|
|
|
dutycycle_range[1] > dutycycle_unit)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
drvdata->continuous.dutycycle_unit = dutycycle_unit;
|
|
|
|
drvdata->continuous.min_uV_dutycycle = dutycycle_range[0];
|
|
|
|
drvdata->continuous.max_uV_dutycycle = dutycycle_range[1];
|
|
|
|
|
2015-07-07 22:06:51 +07:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2014-09-28 09:28:53 +07:00
|
|
|
static int pwm_regulator_probe(struct platform_device *pdev)
|
|
|
|
{
|
2015-07-07 22:06:53 +07:00
|
|
|
const struct regulator_init_data *init_data;
|
2014-09-28 09:28:53 +07:00
|
|
|
struct pwm_regulator_data *drvdata;
|
|
|
|
struct regulator_dev *regulator;
|
|
|
|
struct regulator_config config = { };
|
|
|
|
struct device_node *np = pdev->dev.of_node;
|
2016-06-23 14:39:44 +07:00
|
|
|
enum gpiod_flags gpio_flags;
|
2015-07-06 15:58:29 +07:00
|
|
|
int ret;
|
2014-09-28 09:28:53 +07:00
|
|
|
|
|
|
|
if (!np) {
|
|
|
|
dev_err(&pdev->dev, "Device Tree node missing\n");
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
drvdata = devm_kzalloc(&pdev->dev, sizeof(*drvdata), GFP_KERNEL);
|
|
|
|
if (!drvdata)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
2016-03-08 17:53:22 +07:00
|
|
|
memcpy(&drvdata->desc, &pwm_regulator_desc, sizeof(drvdata->desc));
|
|
|
|
|
2015-07-07 22:06:51 +07:00
|
|
|
if (of_find_property(np, "voltage-table", NULL))
|
2015-07-06 15:58:29 +07:00
|
|
|
ret = pwm_regulator_init_table(pdev, drvdata);
|
2015-07-07 22:06:51 +07:00
|
|
|
else
|
|
|
|
ret = pwm_regulator_init_continuous(pdev, drvdata);
|
|
|
|
if (ret)
|
|
|
|
return ret;
|
2014-09-28 09:28:53 +07:00
|
|
|
|
2015-07-07 22:06:53 +07:00
|
|
|
init_data = of_get_regulator_init_data(&pdev->dev, np,
|
2016-03-08 17:53:22 +07:00
|
|
|
&drvdata->desc);
|
2015-07-07 22:06:53 +07:00
|
|
|
if (!init_data)
|
2014-09-28 09:28:53 +07:00
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
config.of_node = np;
|
|
|
|
config.dev = &pdev->dev;
|
|
|
|
config.driver_data = drvdata;
|
2015-07-07 22:06:53 +07:00
|
|
|
config.init_data = init_data;
|
2014-09-28 09:28:53 +07:00
|
|
|
|
|
|
|
drvdata->pwm = devm_pwm_get(&pdev->dev, NULL);
|
|
|
|
if (IS_ERR(drvdata->pwm)) {
|
2016-03-14 19:50:13 +07:00
|
|
|
ret = PTR_ERR(drvdata->pwm);
|
|
|
|
dev_err(&pdev->dev, "Failed to get PWM: %d\n", ret);
|
|
|
|
return ret;
|
2014-09-28 09:28:53 +07:00
|
|
|
}
|
|
|
|
|
2016-06-23 14:39:44 +07:00
|
|
|
if (init_data->constraints.boot_on || init_data->constraints.always_on)
|
|
|
|
gpio_flags = GPIOD_OUT_HIGH;
|
|
|
|
else
|
|
|
|
gpio_flags = GPIOD_OUT_LOW;
|
|
|
|
drvdata->enb_gpio = devm_gpiod_get_optional(&pdev->dev, "enable",
|
|
|
|
gpio_flags);
|
|
|
|
if (IS_ERR(drvdata->enb_gpio)) {
|
|
|
|
ret = PTR_ERR(drvdata->enb_gpio);
|
|
|
|
dev_err(&pdev->dev, "Failed to get enable GPIO: %d\n", ret);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2016-06-14 16:13:17 +07:00
|
|
|
ret = pwm_adjust_config(drvdata->pwm);
|
|
|
|
if (ret)
|
|
|
|
return ret;
|
2016-04-15 02:17:27 +07:00
|
|
|
|
2014-09-28 09:28:53 +07:00
|
|
|
regulator = devm_regulator_register(&pdev->dev,
|
2016-03-08 17:53:22 +07:00
|
|
|
&drvdata->desc, &config);
|
2014-09-28 09:28:53 +07:00
|
|
|
if (IS_ERR(regulator)) {
|
2016-03-14 19:50:13 +07:00
|
|
|
ret = PTR_ERR(regulator);
|
|
|
|
dev_err(&pdev->dev, "Failed to register regulator %s: %d\n",
|
|
|
|
drvdata->desc.name, ret);
|
|
|
|
return ret;
|
2014-09-28 09:28:53 +07:00
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static const struct of_device_id pwm_of_match[] = {
|
|
|
|
{ .compatible = "pwm-regulator" },
|
|
|
|
{ },
|
|
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(of, pwm_of_match);
|
|
|
|
|
|
|
|
static struct platform_driver pwm_regulator_driver = {
|
|
|
|
.driver = {
|
|
|
|
.name = "pwm-regulator",
|
|
|
|
.of_match_table = of_match_ptr(pwm_of_match),
|
|
|
|
},
|
|
|
|
.probe = pwm_regulator_probe,
|
|
|
|
};
|
|
|
|
|
|
|
|
module_platform_driver(pwm_regulator_driver);
|
|
|
|
|
|
|
|
MODULE_LICENSE("GPL");
|
|
|
|
MODULE_AUTHOR("Lee Jones <lee.jones@linaro.org>");
|
|
|
|
MODULE_DESCRIPTION("PWM Regulator Driver");
|
|
|
|
MODULE_ALIAS("platform:pwm-regulator");
|