LXR linux/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
  19static 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
  26static 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
  36static 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
  84static 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
 112static const struct platform_device_id rt5033_regulator_id[] = {
 113        { "rt5033-regulator", },
 114        { }
 115};
 116MODULE_DEVICE_TABLE(platform, rt5033_regulator_id);
 117
 118static 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};
 125module_platform_driver(rt5033_regulator_driver);
 126
 127MODULE_DESCRIPTION("Richtek RT5033 Regulator driver");
 128MODULE_AUTHOR("Beomho Seo <beomho.seo@samsung.com>");
 129MODULE_LICENSE("GPL");
 130