drivers/regulator/rt5033-regulator.c

   1 /*
   2  * Regulator driver for the Richtek RT5033
   3  *
   4  * Copyright (C) 2014 Samsung Electronics, Co., Ltd.
   5  * Author: Beomho Seo <beomho.seo@samsung.com>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published bythe Free Software Foundation.
  10  */
  11
  12 #include <linux/module.h>
  13 #include <linux/platform_device.h>
  14 #include <linux/regulator/driver.h>
  15 #include <linux/mfd/rt5033.h>
  16 #include <linux/mfd/rt5033-private.h>
  17 #include <linux/regulator/of_regulator.h>
  18
  19 static struct regulator_ops rt5033_safe_ldo_ops = {
  20         .is_enabled             = regulator_is_enabled_regmap,
  21         .enable                 = regulator_enable_regmap,
  22         .disable                = regulator_disable_regmap,
  23         .list_voltage           = regulator_list_voltage_linear,
  24 };
  25
  26 static struct regulator_ops rt5033_buck_ops = {
  27         .is_enabled             = regulator_is_enabled_regmap,
  28         .enable                 = regulator_enable_regmap,
  29         .disable                = regulator_disable_regmap,
  30         .list_voltage           = regulator_list_voltage_linear,
  31         .map_voltage            = regulator_map_voltage_linear,
  32         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
  33         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
  34 };
  35
  36 static const struct regulator_desc rt5033_supported_regulators[] = {
  37         [RT5033_BUCK] = {
  38                 .name           = "BUCK",
  39                 .id             = RT5033_BUCK,
  40                 .ops            = &rt5033_buck_ops,
  41                 .type           = REGULATOR_VOLTAGE,
  42                 .owner          = THIS_MODULE,
  43                 .n_voltages     = RT5033_REGULATOR_BUCK_VOLTAGE_STEP_NUM,
  44                 .min_uV         = RT5033_REGULATOR_BUCK_VOLTAGE_MIN,
  45                 .uV_step        = RT5033_REGULATOR_BUCK_VOLTAGE_STEP,
  46                 .enable_reg     = RT5033_REG_CTRL,
  47                 .enable_mask    = RT5033_CTRL_EN_BUCK_MASK,
  48                 .vsel_reg       = RT5033_REG_BUCK_CTRL,
  49                 .vsel_mask      = RT5033_BUCK_CTRL_MASK,
  50         },
  51         [RT5033_LDO] = {
  52                 .name           = "LDO",
  53                 .id             = RT5033_LDO,
  54                 .ops            = &rt5033_buck_ops,
  55                 .type           = REGULATOR_VOLTAGE,
  56                 .owner          = THIS_MODULE,
  57                 .n_voltages     = RT5033_REGULATOR_LDO_VOLTAGE_STEP_NUM,
  58                 .min_uV         = RT5033_REGULATOR_LDO_VOLTAGE_MIN,
  59                 .uV_step        = RT5033_REGULATOR_LDO_VOLTAGE_STEP,
  60                 .enable_reg     = RT5033_REG_CTRL,
  61                 .enable_mask    = RT5033_CTRL_EN_LDO_MASK,
  62                 .vsel_reg       = RT5033_REG_LDO_CTRL,
  63                 .vsel_mask      = RT5033_LDO_CTRL_MASK,
  64         },
  65         [RT5033_SAFE_LDO] = {
  66                 .name           = "SAFE_LDO",
  67                 .id             = RT5033_SAFE_LDO,
  68                 .ops            = &rt5033_safe_ldo_ops,
  69                 .type           = REGULATOR_VOLTAGE,
  70                 .owner          = THIS_MODULE,
  71                 .n_voltages     = 1,
  72                 .min_uV         = RT5033_REGULATOR_SAFE_LDO_VOLTAGE,
  73                 .enable_reg     = RT5033_REG_CTRL,
  74                 .enable_mask    = RT5033_CTRL_EN_SAFE_LDO_MASK,
  75         },
  76 };
  77
  78 static int rt5033_regulator_probe(struct platform_device *pdev)
  79 {
  80         struct rt5033_dev *rt5033 = dev_get_drvdata(pdev->dev.parent);
  81         int ret, i;
  82         struct regulator_config config = {};
  83
  84         config.dev = &pdev->dev;
  85         config.driver_data = rt5033;
  86
  87         for (i = 0; i < ARRAY_SIZE(rt5033_supported_regulators); i++) {
  88                 struct regulator_dev *regulator;
  89
  90                 config.regmap = rt5033->regmap;
  91
  92                 regulator = devm_regulator_register(&pdev->dev,
  93                                 &rt5033_supported_regulators[i], &config);
  94                 if (IS_ERR(regulator)) {
  95                         ret = PTR_ERR(regulator);
  96                         dev_err(&pdev->dev,
  97                                 "Regulator init failed %d: with error: %d\n",
  98                                 i, ret);
  99                         return ret;
 100                 }
 101         }
 102
 103         return 0;
 104 }
 105
 106 static const struct platform_device_id rt5033_regulator_id[] = {
 107         { "rt5033-regulator", },
 108         { }
 109 };
 110 MODULE_DEVICE_TABLE(platform, rt5033_regulator_id);
 111
 112 static struct platform_driver rt5033_regulator_driver = {
 113         .driver = {
 114                 .name = "rt5033-regulator",
 115         },
 116         .probe          = rt5033_regulator_probe,
 117         .id_table       = rt5033_regulator_id,
 118 };
 119 module_platform_driver(rt5033_regulator_driver);
 120
 121 MODULE_DESCRIPTION("Richtek RT5033 Regulator driver");
 122 MODULE_AUTHOR("Beomho Seo <beomho.seo@samsung.com>");
 123 MODULE_LICENSE("GPL");