linux-stable/drivers/regulator/tps6105x-regulator.c
Mark Brown c172708d38 regulator: core: Use a struct to pass in regulator runtime configuration
Rather than adding new arguments to regulator_register() every time we
want to add a new bit of dynamic information at runtime change the function
to take these via a struct. By doing this we avoid needing to do further
changes like the recent addition of device tree support which required each
regulator driver to be updated to take an additional parameter.

The regulator_desc which should (mostly) be static data is still passed
separately as most drivers are able to configure this statically at build
time.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2012-04-09 12:37:09 +01:00

201 lines
5 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, &regval);
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, &regval);
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 const 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;
struct regulator_config config = { };
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;
}
config.dev = &tps6105x->client->dev;
config.init_data = pdata->regulator_data;
config.driver_data = tps6105x;
/* Register regulator with framework */
tps6105x->regulator = regulator_register(&tps6105x_regulator_desc,
&config);
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");