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 .id = RT5033_BUCK, 40 .ops = &rt5033_buck_ops, 41 .type = REGULATOR_VOLTAGE, 42 .owner = THIS_MODULE, 43 .n_voltages = RT5033_REGULATOR_BUCK_VOLTAGE_STEP_NUM, 44 .min_uV = RT5033_REGULATOR_BUCK_VOLTAGE_MIN, 45 .uV_step = RT5033_REGULATOR_BUCK_VOLTAGE_STEP, 46 .enable_reg = RT5033_REG_CTRL, 47 .enable_mask = RT5033_CTRL_EN_BUCK_MASK, 48 .vsel_reg = RT5033_REG_BUCK_CTRL, 49 .vsel_mask = RT5033_BUCK_CTRL_MASK, 50 }, 51 [RT5033_LDO] = { 52 .name = "LDO", 53 .id = RT5033_LDO, 54 .ops = &rt5033_buck_ops, 55 .type = REGULATOR_VOLTAGE, 56 .owner = THIS_MODULE, 57 .n_voltages = RT5033_REGULATOR_LDO_VOLTAGE_STEP_NUM, 58 .min_uV = RT5033_REGULATOR_LDO_VOLTAGE_MIN, 59 .uV_step = RT5033_REGULATOR_LDO_VOLTAGE_STEP, 60 .enable_reg = RT5033_REG_CTRL, 61 .enable_mask = RT5033_CTRL_EN_LDO_MASK, 62 .vsel_reg = RT5033_REG_LDO_CTRL, 63 .vsel_mask = RT5033_LDO_CTRL_MASK, 64 }, 65 [RT5033_SAFE_LDO] = { 66 .name = "SAFE_LDO", 67 .id = RT5033_SAFE_LDO, 68 .ops = &rt5033_safe_ldo_ops, 69 .type = REGULATOR_VOLTAGE, 70 .owner = THIS_MODULE, 71 .n_voltages = 1, 72 .min_uV = RT5033_REGULATOR_SAFE_LDO_VOLTAGE, 73 .enable_reg = RT5033_REG_CTRL, 74 .enable_mask = RT5033_CTRL_EN_SAFE_LDO_MASK, 75 }, 76 }; 77 78 static int rt5033_regulator_probe(struct platform_device *pdev) 79 { 80 struct rt5033_dev *rt5033 = dev_get_drvdata(pdev->dev.parent); 81 int ret, i; 82 struct regulator_config config = {}; 83 84 config.dev = &pdev->dev; 85 config.driver_data = rt5033; 86 87 for (i = 0; i < ARRAY_SIZE(rt5033_supported_regulators); i++) { 88 struct regulator_dev *regulator; 89 90 config.regmap = rt5033->regmap; 91 92 regulator = devm_regulator_register(&pdev->dev, 93 &rt5033_supported_regulators[i], &config); 94 if (IS_ERR(regulator)) { 95 ret = PTR_ERR(regulator); 96 dev_err(&pdev->dev, 97 "Regulator init failed %d: with error: %d\n", 98 i, ret); 99 return ret; 100 } 101 } 102 103 return 0; 104 } 105 106 static const struct platform_device_id rt5033_regulator_id[] = { 107 { "rt5033-regulator", }, 108 { } 109 }; 110 MODULE_DEVICE_TABLE(platform, rt5033_regulator_id); 111 112 static struct platform_driver rt5033_regulator_driver = { 113 .driver = { 114 .name = "rt5033-regulator", 115 }, 116 .probe = rt5033_regulator_probe, 117 .id_table = rt5033_regulator_id, 118 }; 119 module_platform_driver(rt5033_regulator_driver); 120 121 MODULE_DESCRIPTION("Richtek RT5033 Regulator driver"); 122 MODULE_AUTHOR("Beomho Seo <beomho.seo@samsung.com>"); 123 MODULE_LICENSE("GPL"); 124