LXR linux/drivers/regulator/tps6105x-regulator.c

   1/*
   2 * Driver for TPS61050/61052 boost converters, typically used for white LEDs
   3 * or audio amplifiers.
   4 *
   5 * Copyright (C) 2011 ST-Ericsson SA
   6 * Written on behalf of Linaro for ST-Ericsson
   7 *
   8 * Author: Linus Walleij <linus.walleij@linaro.org>
   9 *
  10 * License terms: GNU General Public License (GPL) version 2
  11 */
  12
  13#include <linux/module.h>
  14#include <linux/kernel.h>
  15#include <linux/init.h>
  16#include <linux/err.h>
  17#include <linux/regmap.h>
  18#include <linux/platform_device.h>
  19#include <linux/regulator/driver.h>
  20#include <linux/mfd/core.h>
  21#include <linux/mfd/tps6105x.h>
  22
  23static const unsigned int tps6105x_voltages[] = {
  24        4500000,
  25        5000000,
  26        5250000,
  27        5000000, /* There is an additional 5V */
  28};
  29
  30static struct regulator_ops tps6105x_regulator_ops = {
  31        .enable         = regulator_enable_regmap,
  32        .disable        = regulator_disable_regmap,
  33        .is_enabled     = regulator_is_enabled_regmap,
  34        .get_voltage_sel = regulator_get_voltage_sel_regmap,
  35        .set_voltage_sel = regulator_set_voltage_sel_regmap,
  36        .list_voltage   = regulator_list_voltage_table,
  37};
  38
  39static const struct regulator_desc tps6105x_regulator_desc = {
  40        .name           = "tps6105x-boost",
  41        .ops            = &tps6105x_regulator_ops,
  42        .type           = REGULATOR_VOLTAGE,
  43        .id             = 0,
  44        .owner          = THIS_MODULE,
  45        .n_voltages     = ARRAY_SIZE(tps6105x_voltages),
  46        .volt_table     = tps6105x_voltages,
  47        .vsel_reg       = TPS6105X_REG_0,
  48        .vsel_mask      = TPS6105X_REG0_VOLTAGE_MASK,
  49        .enable_reg     = TPS6105X_REG_0,
  50        .enable_mask    = TPS6105X_REG0_MODE_MASK,
  51        .enable_val     = TPS6105X_REG0_MODE_VOLTAGE <<
  52                          TPS6105X_REG0_MODE_SHIFT,
  53};
  54
  55/*
  56 * Registers the chip as a voltage regulator
  57 */
  58static int tps6105x_regulator_probe(struct platform_device *pdev)
  59{
  60        struct tps6105x *tps6105x = dev_get_platdata(&pdev->dev);
  61        struct tps6105x_platform_data *pdata = tps6105x->pdata;
  62        struct regulator_config config = { };
  63        int ret;
  64
  65        /* This instance is not set for regulator mode so bail out */
  66        if (pdata->mode != TPS6105X_MODE_VOLTAGE) {
  67                dev_info(&pdev->dev,
  68                        "chip not in voltage mode mode, exit probe\n");
  69                return 0;
  70        }
  71
  72        config.dev = &tps6105x->client->dev;
  73        config.init_data = pdata->regulator_data;
  74        config.driver_data = tps6105x;
  75        config.regmap = tps6105x->regmap;
  76
  77        /* Register regulator with framework */
  78        tps6105x->regulator = devm_regulator_register(&pdev->dev,
  79                                                      &tps6105x_regulator_desc,
  80                                                      &config);
  81        if (IS_ERR(tps6105x->regulator)) {
  82                ret = PTR_ERR(tps6105x->regulator);
  83                dev_err(&tps6105x->client->dev,
  84                        "failed to register regulator\n");
  85                return ret;
  86        }
  87        platform_set_drvdata(pdev, tps6105x);
  88
  89        return 0;
  90}
  91
  92static struct platform_driver tps6105x_regulator_driver = {
  93        .driver = {
  94                .name  = "tps6105x-regulator",
  95        },
  96        .probe = tps6105x_regulator_probe,
  97};
  98
  99static __init int tps6105x_regulator_init(void)
 100{
 101        return platform_driver_register(&tps6105x_regulator_driver);
 102}
 103subsys_initcall(tps6105x_regulator_init);
 104
 105static __exit void tps6105x_regulator_exit(void)
 106{
 107        platform_driver_unregister(&tps6105x_regulator_driver);
 108}
 109module_exit(tps6105x_regulator_exit);
 110
 111MODULE_AUTHOR("Linus Walleij <linus.walleij@linaro.org>");
 112MODULE_DESCRIPTION("TPS6105x regulator driver");
 113MODULE_LICENSE("GPL v2");
 114MODULE_ALIAS("platform:tps6105x-regulator");
 115