drivers/regulator/rt5033-regulator.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Regulator driver for the Richtek RT5033
   4  *
   5  * Copyright (C) 2014 Samsung Electronics, Co., Ltd.
   6  * Author: Beomho Seo <beomho.seo@samsung.com>
   7  */
   8
   9 #include <linux/module.h>
  10 #include <linux/platform_device.h>
  11 #include <linux/regulator/driver.h>
  12 #include <linux/mfd/rt5033.h>
  13 #include <linux/mfd/rt5033-private.h>
  14 #include <linux/regulator/of_regulator.h>
  15
  16 static const struct regulator_ops rt5033_safe_ldo_ops = {
  17         .is_enabled             = regulator_is_enabled_regmap,
  18         .enable                 = regulator_enable_regmap,
  19         .disable                = regulator_disable_regmap,
  20         .list_voltage           = regulator_list_voltage_linear,
  21 };
  22
  23 static const struct regulator_ops rt5033_buck_ops = {
  24         .is_enabled             = regulator_is_enabled_regmap,
  25         .enable                 = regulator_enable_regmap,
  26         .disable                = regulator_disable_regmap,
  27         .list_voltage           = regulator_list_voltage_linear,
  28         .map_voltage            = regulator_map_voltage_linear,
  29         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
  30         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
  31 };
  32
  33 static const struct regulator_desc rt5033_supported_regulators[] = {
  34         [RT5033_BUCK] = {
  35                 .name           = "BUCK",
  36                 .of_match       = of_match_ptr("BUCK"),
  37                 .regulators_node = of_match_ptr("regulators"),
  38                 .id             = RT5033_BUCK,
  39                 .ops            = &rt5033_buck_ops,
  40                 .type           = REGULATOR_VOLTAGE,
  41                 .owner          = THIS_MODULE,
  42                 .n_voltages     = RT5033_REGULATOR_BUCK_VOLTAGE_STEP_NUM,
  43                 .min_uV         = RT5033_REGULATOR_BUCK_VOLTAGE_MIN,
  44                 .uV_step        = RT5033_REGULATOR_BUCK_VOLTAGE_STEP,
  45                 .enable_reg     = RT5033_REG_CTRL,
  46                 .enable_mask    = RT5033_CTRL_EN_BUCK_MASK,
  47                 .vsel_reg       = RT5033_REG_BUCK_CTRL,
  48                 .vsel_mask      = RT5033_BUCK_CTRL_MASK,
  49         },
  50         [RT5033_LDO] = {
  51                 .name           = "LDO",
  52                 .of_match       = of_match_ptr("LDO"),
  53                 .regulators_node = of_match_ptr("regulators"),
  54                 .id             = RT5033_LDO,
  55                 .ops            = &rt5033_buck_ops,
  56                 .type           = REGULATOR_VOLTAGE,
  57                 .owner          = THIS_MODULE,
  58                 .n_voltages     = RT5033_REGULATOR_LDO_VOLTAGE_STEP_NUM,
  59                 .min_uV         = RT5033_REGULATOR_LDO_VOLTAGE_MIN,
  60                 .uV_step        = RT5033_REGULATOR_LDO_VOLTAGE_STEP,
  61                 .enable_reg     = RT5033_REG_CTRL,
  62                 .enable_mask    = RT5033_CTRL_EN_LDO_MASK,
  63                 .vsel_reg       = RT5033_REG_LDO_CTRL,
  64                 .vsel_mask      = RT5033_LDO_CTRL_MASK,
  65         },
  66         [RT5033_SAFE_LDO] = {
  67                 .name           = "SAFE_LDO",
  68                 .of_match       = of_match_ptr("SAFE_LDO"),
  69                 .regulators_node = of_match_ptr("regulators"),
  70                 .id             = RT5033_SAFE_LDO,
  71                 .ops            = &rt5033_safe_ldo_ops,
  72                 .type           = REGULATOR_VOLTAGE,
  73                 .owner          = THIS_MODULE,
  74                 .n_voltages     = 1,
  75                 .min_uV         = RT5033_REGULATOR_SAFE_LDO_VOLTAGE,
  76                 .enable_reg     = RT5033_REG_CTRL,
  77                 .enable_mask    = RT5033_CTRL_EN_SAFE_LDO_MASK,
  78         },
  79 };
  80
  81 static int rt5033_regulator_probe(struct platform_device *pdev)
  82 {
  83         struct rt5033_dev *rt5033 = dev_get_drvdata(pdev->dev.parent);
  84         int ret, i;
  85         struct regulator_config config = {};
  86
  87         config.dev = rt5033->dev;
  88         config.driver_data = rt5033;
  89
  90         for (i = 0; i < ARRAY_SIZE(rt5033_supported_regulators); i++) {
  91                 struct regulator_dev *regulator;
  92
  93                 config.regmap = rt5033->regmap;
  94
  95                 regulator = devm_regulator_register(&pdev->dev,
  96                                 &rt5033_supported_regulators[i], &config);
  97                 if (IS_ERR(regulator)) {
  98                         ret = PTR_ERR(regulator);
  99                         dev_err(&pdev->dev,
 100                                 "Regulator init failed %d: with error: %d\n",
 101                                 i, ret);
 102                         return ret;
 103                 }
 104         }
 105
 106         return 0;
 107 }
 108
 109 static const struct platform_device_id rt5033_regulator_id[] = {
 110         { "rt5033-regulator", },
 111         { }
 112 };
 113 MODULE_DEVICE_TABLE(platform, rt5033_regulator_id);
 114
 115 static struct platform_driver rt5033_regulator_driver = {
 116         .driver = {
 117                 .name = "rt5033-regulator",
 118         },
 119         .probe          = rt5033_regulator_probe,
 120         .id_table       = rt5033_regulator_id,
 121 };
 122 module_platform_driver(rt5033_regulator_driver);
 123
 124 MODULE_DESCRIPTION("Richtek RT5033 Regulator driver");
 125 MODULE_AUTHOR("Beomho Seo <beomho.seo@samsung.com>");
 126 MODULE_LICENSE("GPL");