drivers/regulator/tps6105x-regulator.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Driver for TPS61050/61052 boost converters, typically used for white LEDs
   4  * or audio amplifiers.
   5  *
   6  * Copyright (C) 2011 ST-Ericsson SA
   7  * Written on behalf of Linaro for ST-Ericsson
   8  *
   9  * Author: Linus Walleij <linus.walleij@linaro.org>
  10  */
  11
  12 #include <linux/module.h>
  13 #include <linux/kernel.h>
  14 #include <linux/init.h>
  15 #include <linux/err.h>
  16 #include <linux/regmap.h>
  17 #include <linux/platform_device.h>
  18 #include <linux/regulator/driver.h>
  19 #include <linux/mfd/core.h>
  20 #include <linux/mfd/tps6105x.h>
  21
  22 static const unsigned int tps6105x_voltages[] = {
  23         4500000,
  24         5000000,
  25         5250000,
  26         5000000, /* There is an additional 5V */
  27 };
  28
  29 static const struct regulator_ops tps6105x_regulator_ops = {
  30         .enable         = regulator_enable_regmap,
  31         .disable        = regulator_disable_regmap,
  32         .is_enabled     = regulator_is_enabled_regmap,
  33         .get_voltage_sel = regulator_get_voltage_sel_regmap,
  34         .set_voltage_sel = regulator_set_voltage_sel_regmap,
  35         .list_voltage   = regulator_list_voltage_table,
  36 };
  37
  38 static const struct regulator_desc tps6105x_regulator_desc = {
  39         .name           = "tps6105x-boost",
  40         .of_match       = of_match_ptr("regulator"),
  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.of_node = pdev->dev.parent->of_node;
  76         config.regmap = tps6105x->regmap;
  77
  78         /* Register regulator with framework */
  79         tps6105x->regulator = devm_regulator_register(&pdev->dev,
  80                                                       &tps6105x_regulator_desc,
  81                                                       &config);
  82         if (IS_ERR(tps6105x->regulator)) {
  83                 ret = PTR_ERR(tps6105x->regulator);
  84                 dev_err(&tps6105x->client->dev,
  85                         "failed to register regulator\n");
  86                 return ret;
  87         }
  88         platform_set_drvdata(pdev, tps6105x);
  89
  90         return 0;
  91 }
  92
  93 static struct platform_driver tps6105x_regulator_driver = {
  94         .driver = {
  95                 .name  = "tps6105x-regulator",
  96         },
  97         .probe = tps6105x_regulator_probe,
  98 };
  99
 100 static __init int tps6105x_regulator_init(void)
 101 {
 102         return platform_driver_register(&tps6105x_regulator_driver);
 103 }
 104 subsys_initcall(tps6105x_regulator_init);
 105
 106 static __exit void tps6105x_regulator_exit(void)
 107 {
 108         platform_driver_unregister(&tps6105x_regulator_driver);
 109 }
 110 module_exit(tps6105x_regulator_exit);
 111
 112 MODULE_AUTHOR("Linus Walleij <linus.walleij@linaro.org>");
 113 MODULE_DESCRIPTION("TPS6105x regulator driver");
 114 MODULE_LICENSE("GPL v2");
 115 MODULE_ALIAS("platform:tps6105x-regulator");