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"); 137