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 linear_range rt5033_buck_ranges[] = {
  17         REGULATOR_LINEAR_RANGE(1000000, 0, 20, 100000),
  18         REGULATOR_LINEAR_RANGE(3000000, 21, 31, 0),
  19 };
  20
  21 static const struct linear_range rt5033_ldo_ranges[] = {
  22         REGULATOR_LINEAR_RANGE(1200000, 0, 18, 100000),
  23         REGULATOR_LINEAR_RANGE(3000000, 19, 31, 0),
  24 };
  25
  26 static const struct regulator_ops rt5033_safe_ldo_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 };
  32
  33 static const struct regulator_ops rt5033_buck_ops = {
  34         .is_enabled             = regulator_is_enabled_regmap,
  35         .enable                 = regulator_enable_regmap,
  36         .disable                = regulator_disable_regmap,
  37         .list_voltage           = regulator_list_voltage_linear_range,
  38         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
  39         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
  40 };
  41
  42 static const struct regulator_desc rt5033_supported_regulators[] = {
  43         [RT5033_BUCK] = {
  44                 .name           = "BUCK",
  45                 .of_match       = of_match_ptr("BUCK"),
  46                 .regulators_node = of_match_ptr("regulators"),
  47                 .id             = RT5033_BUCK,
  48                 .ops            = &rt5033_buck_ops,
  49                 .type           = REGULATOR_VOLTAGE,
  50                 .owner          = THIS_MODULE,
  51                 .n_voltages     = RT5033_REGULATOR_BUCK_VOLTAGE_STEP_NUM,
  52                 .linear_ranges  = rt5033_buck_ranges,
  53                 .n_linear_ranges = ARRAY_SIZE(rt5033_buck_ranges),
  54                 .enable_reg     = RT5033_REG_CTRL,
  55                 .enable_mask    = RT5033_CTRL_EN_BUCK_MASK,
  56                 .vsel_reg       = RT5033_REG_BUCK_CTRL,
  57                 .vsel_mask      = RT5033_BUCK_CTRL_MASK,
  58         },
  59         [RT5033_LDO] = {
  60                 .name           = "LDO",
  61                 .of_match       = of_match_ptr("LDO"),
  62                 .regulators_node = of_match_ptr("regulators"),
  63                 .id             = RT5033_LDO,
  64                 .ops            = &rt5033_buck_ops,
  65                 .type           = REGULATOR_VOLTAGE,
  66                 .owner          = THIS_MODULE,
  67                 .n_voltages     = RT5033_REGULATOR_LDO_VOLTAGE_STEP_NUM,
  68                 .linear_ranges  = rt5033_ldo_ranges,
  69                 .n_linear_ranges = ARRAY_SIZE(rt5033_ldo_ranges),
  70                 .enable_reg     = RT5033_REG_CTRL,
  71                 .enable_mask    = RT5033_CTRL_EN_LDO_MASK,
  72                 .vsel_reg       = RT5033_REG_LDO_CTRL,
  73                 .vsel_mask      = RT5033_LDO_CTRL_MASK,
  74         },
  75         [RT5033_SAFE_LDO] = {
  76                 .name           = "SAFE_LDO",
  77                 .of_match       = of_match_ptr("SAFE_LDO"),
  78                 .regulators_node = of_match_ptr("regulators"),
  79                 .id             = RT5033_SAFE_LDO,
  80                 .ops            = &rt5033_safe_ldo_ops,
  81                 .type           = REGULATOR_VOLTAGE,
  82                 .owner          = THIS_MODULE,
  83                 .n_voltages     = 1,
  84                 .min_uV         = RT5033_REGULATOR_SAFE_LDO_VOLTAGE,
  85                 .enable_reg     = RT5033_REG_CTRL,
  86                 .enable_mask    = RT5033_CTRL_EN_SAFE_LDO_MASK,
  87         },
  88 };
  89
  90 static int rt5033_regulator_probe(struct platform_device *pdev)
  91 {
  92         struct rt5033_dev *rt5033 = dev_get_drvdata(pdev->dev.parent);
  93         int ret, i;
  94         struct regulator_config config = {};
  95
  96         config.dev = rt5033->dev;
  97         config.driver_data = rt5033;
  98
  99         for (i = 0; i < ARRAY_SIZE(rt5033_supported_regulators); i++) {
 100                 struct regulator_dev *regulator;
 101
 102                 config.regmap = rt5033->regmap;
 103
 104                 regulator = devm_regulator_register(&pdev->dev,
 105                                 &rt5033_supported_regulators[i], &config);
 106                 if (IS_ERR(regulator)) {
 107                         ret = PTR_ERR(regulator);
 108                         dev_err(&pdev->dev,
 109                                 "Regulator init failed %d: with error: %d\n",
 110                                 i, ret);
 111                         return ret;
 112                 }
 113         }
 114
 115         return 0;
 116 }
 117
 118 static const struct platform_device_id rt5033_regulator_id[] = {
 119         { "rt5033-regulator", },
 120         { }
 121 };
 122 MODULE_DEVICE_TABLE(platform, rt5033_regulator_id);
 123
 124 static struct platform_driver rt5033_regulator_driver = {
 125         .driver = {
 126                 .name = "rt5033-regulator",
 127                 .probe_type = PROBE_PREFER_ASYNCHRONOUS,
 128         },
 129         .probe          = rt5033_regulator_probe,
 130         .id_table       = rt5033_regulator_id,
 131 };
 132 module_platform_driver(rt5033_regulator_driver);
 133
 134 MODULE_DESCRIPTION("Richtek RT5033 Regulator driver");
 135 MODULE_AUTHOR("Beomho Seo <beomho.seo@samsung.com>");
 136 MODULE_LICENSE("GPL");