mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-23 09:19:51 +00:00
![Axel Lin](/assets/img/avatar_default.png)
Otherwise, calling platform_get_drvdata in tps6105x_regulator_remove returns NULL. Signed-off-by: Axel Lin <axel.lin@gmail.com> Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
197 lines
4.9 KiB
C
197 lines
4.9 KiB
C
/*
|
|
* Driver for TPS61050/61052 boost converters, typically used for white LEDs
|
|
* or audio amplifiers.
|
|
*
|
|
* Copyright (C) 2011 ST-Ericsson SA
|
|
* Written on behalf of Linaro for ST-Ericsson
|
|
*
|
|
* Author: Linus Walleij <linus.walleij@linaro.org>
|
|
*
|
|
* License terms: GNU General Public License (GPL) version 2
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/err.h>
|
|
#include <linux/i2c.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/regulator/driver.h>
|
|
#include <linux/mfd/core.h>
|
|
#include <linux/mfd/tps6105x.h>
|
|
|
|
static const int tps6105x_voltages[] = {
|
|
4500000,
|
|
5000000,
|
|
5250000,
|
|
5000000, /* There is an additional 5V */
|
|
};
|
|
|
|
static int tps6105x_regulator_enable(struct regulator_dev *rdev)
|
|
{
|
|
struct tps6105x *tps6105x = rdev_get_drvdata(rdev);
|
|
int ret;
|
|
|
|
/* Activate voltage mode */
|
|
ret = tps6105x_mask_and_set(tps6105x, TPS6105X_REG_0,
|
|
TPS6105X_REG0_MODE_MASK,
|
|
TPS6105X_REG0_MODE_VOLTAGE << TPS6105X_REG0_MODE_SHIFT);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tps6105x_regulator_disable(struct regulator_dev *rdev)
|
|
{
|
|
struct tps6105x *tps6105x = rdev_get_drvdata(rdev);
|
|
int ret;
|
|
|
|
/* Set into shutdown mode */
|
|
ret = tps6105x_mask_and_set(tps6105x, TPS6105X_REG_0,
|
|
TPS6105X_REG0_MODE_MASK,
|
|
TPS6105X_REG0_MODE_SHUTDOWN << TPS6105X_REG0_MODE_SHIFT);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tps6105x_regulator_is_enabled(struct regulator_dev *rdev)
|
|
{
|
|
struct tps6105x *tps6105x = rdev_get_drvdata(rdev);
|
|
u8 regval;
|
|
int ret;
|
|
|
|
ret = tps6105x_get(tps6105x, TPS6105X_REG_0, ®val);
|
|
if (ret)
|
|
return ret;
|
|
regval &= TPS6105X_REG0_MODE_MASK;
|
|
regval >>= TPS6105X_REG0_MODE_SHIFT;
|
|
|
|
if (regval == TPS6105X_REG0_MODE_VOLTAGE)
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tps6105x_regulator_get_voltage_sel(struct regulator_dev *rdev)
|
|
{
|
|
struct tps6105x *tps6105x = rdev_get_drvdata(rdev);
|
|
u8 regval;
|
|
int ret;
|
|
|
|
ret = tps6105x_get(tps6105x, TPS6105X_REG_0, ®val);
|
|
if (ret)
|
|
return ret;
|
|
|
|
regval &= TPS6105X_REG0_VOLTAGE_MASK;
|
|
regval >>= TPS6105X_REG0_VOLTAGE_SHIFT;
|
|
return (int) regval;
|
|
}
|
|
|
|
static int tps6105x_regulator_set_voltage_sel(struct regulator_dev *rdev,
|
|
unsigned selector)
|
|
{
|
|
struct tps6105x *tps6105x = rdev_get_drvdata(rdev);
|
|
int ret;
|
|
|
|
ret = tps6105x_mask_and_set(tps6105x, TPS6105X_REG_0,
|
|
TPS6105X_REG0_VOLTAGE_MASK,
|
|
selector << TPS6105X_REG0_VOLTAGE_SHIFT);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tps6105x_regulator_list_voltage(struct regulator_dev *rdev,
|
|
unsigned selector)
|
|
{
|
|
if (selector >= ARRAY_SIZE(tps6105x_voltages))
|
|
return -EINVAL;
|
|
|
|
return tps6105x_voltages[selector];
|
|
}
|
|
|
|
static struct regulator_ops tps6105x_regulator_ops = {
|
|
.enable = tps6105x_regulator_enable,
|
|
.disable = tps6105x_regulator_disable,
|
|
.is_enabled = tps6105x_regulator_is_enabled,
|
|
.get_voltage_sel = tps6105x_regulator_get_voltage_sel,
|
|
.set_voltage_sel = tps6105x_regulator_set_voltage_sel,
|
|
.list_voltage = tps6105x_regulator_list_voltage,
|
|
};
|
|
|
|
static struct regulator_desc tps6105x_regulator_desc = {
|
|
.name = "tps6105x-boost",
|
|
.ops = &tps6105x_regulator_ops,
|
|
.type = REGULATOR_VOLTAGE,
|
|
.id = 0,
|
|
.owner = THIS_MODULE,
|
|
.n_voltages = ARRAY_SIZE(tps6105x_voltages),
|
|
};
|
|
|
|
/*
|
|
* Registers the chip as a voltage regulator
|
|
*/
|
|
static int __devinit tps6105x_regulator_probe(struct platform_device *pdev)
|
|
{
|
|
struct tps6105x *tps6105x = dev_get_platdata(&pdev->dev);
|
|
struct tps6105x_platform_data *pdata = tps6105x->pdata;
|
|
int ret;
|
|
|
|
/* This instance is not set for regulator mode so bail out */
|
|
if (pdata->mode != TPS6105X_MODE_VOLTAGE) {
|
|
dev_info(&pdev->dev,
|
|
"chip not in voltage mode mode, exit probe \n");
|
|
return 0;
|
|
}
|
|
|
|
/* Register regulator with framework */
|
|
tps6105x->regulator = regulator_register(&tps6105x_regulator_desc,
|
|
&tps6105x->client->dev,
|
|
pdata->regulator_data, tps6105x);
|
|
if (IS_ERR(tps6105x->regulator)) {
|
|
ret = PTR_ERR(tps6105x->regulator);
|
|
dev_err(&tps6105x->client->dev,
|
|
"failed to register regulator\n");
|
|
return ret;
|
|
}
|
|
platform_set_drvdata(pdev, tps6105x);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __devexit tps6105x_regulator_remove(struct platform_device *pdev)
|
|
{
|
|
struct tps6105x *tps6105x = dev_get_platdata(&pdev->dev);
|
|
regulator_unregister(tps6105x->regulator);
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver tps6105x_regulator_driver = {
|
|
.driver = {
|
|
.name = "tps6105x-regulator",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
.probe = tps6105x_regulator_probe,
|
|
.remove = __devexit_p(tps6105x_regulator_remove),
|
|
};
|
|
|
|
static __init int tps6105x_regulator_init(void)
|
|
{
|
|
return platform_driver_register(&tps6105x_regulator_driver);
|
|
}
|
|
subsys_initcall(tps6105x_regulator_init);
|
|
|
|
static __exit void tps6105x_regulator_exit(void)
|
|
{
|
|
platform_driver_unregister(&tps6105x_regulator_driver);
|
|
}
|
|
module_exit(tps6105x_regulator_exit);
|
|
|
|
MODULE_AUTHOR("Linus Walleij <linus.walleij@linaro.org>");
|
|
MODULE_DESCRIPTION("TPS6105x regulator driver");
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_ALIAS("platform:tps6105x-regulator");
|