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/*
* 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/regmap.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/mfd/core.h>
#include <linux/mfd/tps6105x.h>
static const unsigned 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 = regmap_update_bits(tps6105x->regmap, 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 = regmap_update_bits(tps6105x->regmap, 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);
unsigned int regval;
int ret;
ret = regmap_read(tps6105x->regmap, 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);
unsigned int regval;
int ret;
ret = regmap_read(tps6105x->regmap, 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 = regmap_update_bits(tps6105x->regmap, TPS6105X_REG_0,
TPS6105X_REG0_VOLTAGE_MASK,
selector << TPS6105X_REG0_VOLTAGE_SHIFT);
if (ret)
return ret;
return 0;
}
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 = regulator_list_voltage_table,
};
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),
.volt_table = tps6105x_voltages,
};
/*
* Registers the chip as a voltage regulator
*/
static int 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 = devm_regulator_register(&pdev->dev,
&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 struct platform_driver tps6105x_regulator_driver = {
.driver = {
.name = "tps6105x-regulator",
},
.probe = tps6105x_regulator_probe,
};
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");
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