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
  23 static const unsigned int tps6105x_voltages[] = {
  24         4500000,
  25         5000000,
  26         5250000,
  27         5000000, /* There is an additional 5V */
  28 };
  29
  30 static 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
  39 static 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  */
  58 static 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
  92 static struct platform_driver tps6105x_regulator_driver = {
  93         .driver = {
  94                 .name  = "tps6105x-regulator",
  95         },
  96         .probe = tps6105x_regulator_probe,
  97 };
  98
  99 static __init int tps6105x_regulator_init(void)
 100 {
 101         return platform_driver_register(&tps6105x_regulator_driver);
 102 }
 103 subsys_initcall(tps6105x_regulator_init);
 104
 105 static __exit void tps6105x_regulator_exit(void)
 106 {
 107         platform_driver_unregister(&tps6105x_regulator_driver);
 108 }
 109 module_exit(tps6105x_regulator_exit);
 110
 111 MODULE_AUTHOR("Linus Walleij <linus.walleij@linaro.org>");
 112 MODULE_DESCRIPTION("TPS6105x regulator driver");
 113 MODULE_LICENSE("GPL v2");
 114 MODULE_ALIAS("platform:tps6105x-regulator");