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"); 130