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                 .of_match       = of_match_ptr("BUCK"),
  40                 .regulators_node = of_match_ptr("regulators"),
  41                 .id             = RT5033_BUCK,
  42                 .ops            = &rt5033_buck_ops,
  43                 .type           = REGULATOR_VOLTAGE,
  44                 .owner          = THIS_MODULE,
  45                 .n_voltages     = RT5033_REGULATOR_BUCK_VOLTAGE_STEP_NUM,
  46                 .min_uV         = RT5033_REGULATOR_BUCK_VOLTAGE_MIN,
  47                 .uV_step        = RT5033_REGULATOR_BUCK_VOLTAGE_STEP,
  48                 .enable_reg     = RT5033_REG_CTRL,
  49                 .enable_mask    = RT5033_CTRL_EN_BUCK_MASK,
  50                 .vsel_reg       = RT5033_REG_BUCK_CTRL,
  51                 .vsel_mask      = RT5033_BUCK_CTRL_MASK,
  52         },
  53         [RT5033_LDO] = {
  54                 .name           = "LDO",
  55                 .of_match       = of_match_ptr("LDO"),
  56                 .regulators_node = of_match_ptr("regulators"),
  57                 .id             = RT5033_LDO,
  58                 .ops            = &rt5033_buck_ops,
  59                 .type           = REGULATOR_VOLTAGE,
  60                 .owner          = THIS_MODULE,
  61                 .n_voltages     = RT5033_REGULATOR_LDO_VOLTAGE_STEP_NUM,
  62                 .min_uV         = RT5033_REGULATOR_LDO_VOLTAGE_MIN,
  63                 .uV_step        = RT5033_REGULATOR_LDO_VOLTAGE_STEP,
  64                 .enable_reg     = RT5033_REG_CTRL,
  65                 .enable_mask    = RT5033_CTRL_EN_LDO_MASK,
  66                 .vsel_reg       = RT5033_REG_LDO_CTRL,
  67                 .vsel_mask      = RT5033_LDO_CTRL_MASK,
  68         },
  69         [RT5033_SAFE_LDO] = {
  70                 .name           = "SAFE_LDO",
  71                 .of_match       = of_match_ptr("SAFE_LDO"),
  72                 .regulators_node = of_match_ptr("regulators"),
  73                 .id             = RT5033_SAFE_LDO,
  74                 .ops            = &rt5033_safe_ldo_ops,
  75                 .type           = REGULATOR_VOLTAGE,
  76                 .owner          = THIS_MODULE,
  77                 .n_voltages     = 1,
  78                 .min_uV         = RT5033_REGULATOR_SAFE_LDO_VOLTAGE,
  79                 .enable_reg     = RT5033_REG_CTRL,
  80                 .enable_mask    = RT5033_CTRL_EN_SAFE_LDO_MASK,
  81         },
  82 };
  83
  84 static int rt5033_regulator_probe(struct platform_device *pdev)
  85 {
  86         struct rt5033_dev *rt5033 = dev_get_drvdata(pdev->dev.parent);
  87         int ret, i;
  88         struct regulator_config config = {};
  89
  90         config.dev = rt5033->dev;
  91         config.driver_data = rt5033;
  92
  93         for (i = 0; i < ARRAY_SIZE(rt5033_supported_regulators); i++) {
  94                 struct regulator_dev *regulator;
  95
  96                 config.regmap = rt5033->regmap;
  97
  98                 regulator = devm_regulator_register(&pdev->dev,
  99                                 &rt5033_supported_regulators[i], &config);
 100                 if (IS_ERR(regulator)) {
 101                         ret = PTR_ERR(regulator);
 102                         dev_err(&pdev->dev,
 103                                 "Regulator init failed %d: with error: %d\n",
 104                                 i, ret);
 105                         return ret;
 106                 }
 107         }
 108
 109         return 0;
 110 }
 111
 112 static const struct platform_device_id rt5033_regulator_id[] = {
 113         { "rt5033-regulator", },
 114         { }
 115 };
 116 MODULE_DEVICE_TABLE(platform, rt5033_regulator_id);
 117
 118 static struct platform_driver rt5033_regulator_driver = {
 119         .driver = {
 120                 .name = "rt5033-regulator",
 121         },
 122         .probe          = rt5033_regulator_probe,
 123         .id_table       = rt5033_regulator_id,
 124 };
 125 module_platform_driver(rt5033_regulator_driver);
 126
 127 MODULE_DESCRIPTION("Richtek RT5033 Regulator driver");
 128 MODULE_AUTHOR("Beomho Seo <beomho.seo@samsung.com>");
 129 MODULE_LICENSE("GPL");