2011-03-09 05:02:55 -07:00
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/*
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* Driver for TPS61050/61052 boost converters, typically used for white LEDs
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* or audio amplifiers.
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*
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* Copyright (C) 2011 ST-Ericsson SA
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* Written on behalf of Linaro for ST-Ericsson
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*
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* Author: Linus Walleij <linus.walleij@linaro.org>
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*
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* License terms: GNU General Public License (GPL) version 2
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/err.h>
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#include <linux/i2c.h>
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#include <linux/platform_device.h>
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#include <linux/regulator/driver.h>
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#include <linux/mfd/core.h>
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#include <linux/mfd/tps6105x.h>
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2012-05-19 20:37:33 -06:00
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static const unsigned int tps6105x_voltages[] = {
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2011-03-09 05:02:55 -07:00
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4500000,
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5000000,
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5250000,
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5000000, /* There is an additional 5V */
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};
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static int tps6105x_regulator_enable(struct regulator_dev *rdev)
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{
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struct tps6105x *tps6105x = rdev_get_drvdata(rdev);
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int ret;
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/* Activate voltage mode */
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ret = tps6105x_mask_and_set(tps6105x, TPS6105X_REG_0,
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TPS6105X_REG0_MODE_MASK,
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TPS6105X_REG0_MODE_VOLTAGE << TPS6105X_REG0_MODE_SHIFT);
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if (ret)
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return ret;
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return 0;
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}
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static int tps6105x_regulator_disable(struct regulator_dev *rdev)
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{
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struct tps6105x *tps6105x = rdev_get_drvdata(rdev);
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int ret;
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/* Set into shutdown mode */
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ret = tps6105x_mask_and_set(tps6105x, TPS6105X_REG_0,
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TPS6105X_REG0_MODE_MASK,
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TPS6105X_REG0_MODE_SHUTDOWN << TPS6105X_REG0_MODE_SHIFT);
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if (ret)
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return ret;
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return 0;
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}
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static int tps6105x_regulator_is_enabled(struct regulator_dev *rdev)
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{
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struct tps6105x *tps6105x = rdev_get_drvdata(rdev);
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u8 regval;
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int ret;
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ret = tps6105x_get(tps6105x, TPS6105X_REG_0, ®val);
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if (ret)
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return ret;
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regval &= TPS6105X_REG0_MODE_MASK;
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regval >>= TPS6105X_REG0_MODE_SHIFT;
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if (regval == TPS6105X_REG0_MODE_VOLTAGE)
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return 1;
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return 0;
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}
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static int tps6105x_regulator_get_voltage_sel(struct regulator_dev *rdev)
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{
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struct tps6105x *tps6105x = rdev_get_drvdata(rdev);
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u8 regval;
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int ret;
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ret = tps6105x_get(tps6105x, TPS6105X_REG_0, ®val);
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if (ret)
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return ret;
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regval &= TPS6105X_REG0_VOLTAGE_MASK;
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regval >>= TPS6105X_REG0_VOLTAGE_SHIFT;
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return (int) regval;
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}
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static int tps6105x_regulator_set_voltage_sel(struct regulator_dev *rdev,
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unsigned selector)
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{
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struct tps6105x *tps6105x = rdev_get_drvdata(rdev);
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int ret;
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ret = tps6105x_mask_and_set(tps6105x, TPS6105X_REG_0,
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TPS6105X_REG0_VOLTAGE_MASK,
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selector << TPS6105X_REG0_VOLTAGE_SHIFT);
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if (ret)
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return ret;
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return 0;
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}
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static struct regulator_ops tps6105x_regulator_ops = {
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.enable = tps6105x_regulator_enable,
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.disable = tps6105x_regulator_disable,
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.is_enabled = tps6105x_regulator_is_enabled,
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.get_voltage_sel = tps6105x_regulator_get_voltage_sel,
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.set_voltage_sel = tps6105x_regulator_set_voltage_sel,
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2012-05-19 20:37:33 -06:00
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.list_voltage = regulator_list_voltage_table,
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2011-03-09 05:02:55 -07:00
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};
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2012-04-05 18:30:42 -06:00
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static const struct regulator_desc tps6105x_regulator_desc = {
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2011-03-09 05:02:55 -07:00
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.name = "tps6105x-boost",
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.ops = &tps6105x_regulator_ops,
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.type = REGULATOR_VOLTAGE,
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.id = 0,
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.owner = THIS_MODULE,
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.n_voltages = ARRAY_SIZE(tps6105x_voltages),
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2012-05-19 20:37:33 -06:00
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.volt_table = tps6105x_voltages,
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2011-03-09 05:02:55 -07:00
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};
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/*
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* Registers the chip as a voltage regulator
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*/
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2012-11-19 11:22:22 -07:00
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static int tps6105x_regulator_probe(struct platform_device *pdev)
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2011-03-09 05:02:55 -07:00
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{
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2011-05-11 02:33:25 -06:00
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struct tps6105x *tps6105x = dev_get_platdata(&pdev->dev);
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2011-03-09 05:02:55 -07:00
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struct tps6105x_platform_data *pdata = tps6105x->pdata;
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2012-04-03 17:50:22 -06:00
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struct regulator_config config = { };
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2011-03-09 05:02:55 -07:00
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int ret;
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/* This instance is not set for regulator mode so bail out */
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if (pdata->mode != TPS6105X_MODE_VOLTAGE) {
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dev_info(&pdev->dev,
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2013-10-14 02:51:51 -06:00
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"chip not in voltage mode mode, exit probe\n");
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2011-03-09 05:02:55 -07:00
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return 0;
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}
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2012-04-03 17:50:22 -06:00
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config.dev = &tps6105x->client->dev;
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config.init_data = pdata->regulator_data;
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config.driver_data = tps6105x;
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2011-03-09 05:02:55 -07:00
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/* Register regulator with framework */
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2013-09-29 18:57:54 -06:00
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tps6105x->regulator = devm_regulator_register(&pdev->dev,
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&tps6105x_regulator_desc,
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&config);
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2011-03-09 05:02:55 -07:00
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if (IS_ERR(tps6105x->regulator)) {
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ret = PTR_ERR(tps6105x->regulator);
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dev_err(&tps6105x->client->dev,
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"failed to register regulator\n");
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return ret;
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}
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2011-03-29 03:54:58 -06:00
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platform_set_drvdata(pdev, tps6105x);
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2011-03-09 05:02:55 -07:00
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return 0;
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}
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static struct platform_driver tps6105x_regulator_driver = {
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.driver = {
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.name = "tps6105x-regulator",
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},
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.probe = tps6105x_regulator_probe,
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};
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static __init int tps6105x_regulator_init(void)
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{
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return platform_driver_register(&tps6105x_regulator_driver);
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}
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subsys_initcall(tps6105x_regulator_init);
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static __exit void tps6105x_regulator_exit(void)
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{
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platform_driver_unregister(&tps6105x_regulator_driver);
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}
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module_exit(tps6105x_regulator_exit);
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MODULE_AUTHOR("Linus Walleij <linus.walleij@linaro.org>");
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MODULE_DESCRIPTION("TPS6105x regulator driver");
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MODULE_LICENSE("GPL v2");
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MODULE_ALIAS("platform:tps6105x-regulator");
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