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"); 127