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b1917578fd
This patch add device driver of Richtek RT5033 PMIC. The driver support multiple regulator like LDO and synchronous Buck. The integrated synchronous buck converter is designed to provide 0.6 A application with high efficiency. Two LDOs are integrated. One safe LDO is for 60mA and the other one LDO is for 150 mA. Cc: Liam Girdwood <lgirdwood@gmail.com> Cc: Mark Brown <broonie@kernel.org> Signed-off-by: Beomho Seo <beomho.seo@samsung.com> Acked-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: Mark Brown <broonie@kernel.org>
124 lines
3.5 KiB
C
124 lines
3.5 KiB
C
/*
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* Regulator driver for the Richtek RT5033
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*
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* Copyright (C) 2014 Samsung Electronics, Co., Ltd.
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* Author: Beomho Seo <beomho.seo@samsung.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published bythe Free Software Foundation.
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*/
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/regulator/driver.h>
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#include <linux/mfd/rt5033.h>
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#include <linux/mfd/rt5033-private.h>
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#include <linux/regulator/of_regulator.h>
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static struct regulator_ops rt5033_safe_ldo_ops = {
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.is_enabled = regulator_is_enabled_regmap,
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.enable = regulator_enable_regmap,
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.disable = regulator_disable_regmap,
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.list_voltage = regulator_list_voltage_linear,
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};
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static struct regulator_ops rt5033_buck_ops = {
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.is_enabled = regulator_is_enabled_regmap,
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.enable = regulator_enable_regmap,
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.disable = regulator_disable_regmap,
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.list_voltage = regulator_list_voltage_linear,
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.map_voltage = regulator_map_voltage_linear,
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.get_voltage_sel = regulator_get_voltage_sel_regmap,
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.set_voltage_sel = regulator_set_voltage_sel_regmap,
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};
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static const struct regulator_desc rt5033_supported_regulators[] = {
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[RT5033_BUCK] = {
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.name = "BUCK",
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.id = RT5033_BUCK,
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.ops = &rt5033_buck_ops,
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.type = REGULATOR_VOLTAGE,
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.owner = THIS_MODULE,
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.n_voltages = RT5033_REGULATOR_BUCK_VOLTAGE_STEP_NUM,
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.min_uV = RT5033_REGULATOR_BUCK_VOLTAGE_MIN,
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.uV_step = RT5033_REGULATOR_BUCK_VOLTAGE_STEP,
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.enable_reg = RT5033_REG_CTRL,
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.enable_mask = RT5033_CTRL_EN_BUCK_MASK,
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.vsel_reg = RT5033_REG_BUCK_CTRL,
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.vsel_mask = RT5033_BUCK_CTRL_MASK,
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},
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[RT5033_LDO] = {
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.name = "LDO",
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.id = RT5033_LDO,
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.ops = &rt5033_buck_ops,
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.type = REGULATOR_VOLTAGE,
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.owner = THIS_MODULE,
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.n_voltages = RT5033_REGULATOR_LDO_VOLTAGE_STEP_NUM,
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.min_uV = RT5033_REGULATOR_LDO_VOLTAGE_MIN,
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.uV_step = RT5033_REGULATOR_LDO_VOLTAGE_STEP,
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.enable_reg = RT5033_REG_CTRL,
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.enable_mask = RT5033_CTRL_EN_LDO_MASK,
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.vsel_reg = RT5033_REG_LDO_CTRL,
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.vsel_mask = RT5033_LDO_CTRL_MASK,
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},
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[RT5033_SAFE_LDO] = {
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.name = "SAFE_LDO",
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.id = RT5033_SAFE_LDO,
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.ops = &rt5033_safe_ldo_ops,
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.type = REGULATOR_VOLTAGE,
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.owner = THIS_MODULE,
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.n_voltages = 1,
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.min_uV = RT5033_REGULATOR_SAFE_LDO_VOLTAGE,
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.enable_reg = RT5033_REG_CTRL,
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.enable_mask = RT5033_CTRL_EN_SAFE_LDO_MASK,
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},
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};
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static int rt5033_regulator_probe(struct platform_device *pdev)
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{
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struct rt5033_dev *rt5033 = dev_get_drvdata(pdev->dev.parent);
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int ret, i;
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struct regulator_config config = {};
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config.dev = &pdev->dev;
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config.driver_data = rt5033;
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for (i = 0; i < ARRAY_SIZE(rt5033_supported_regulators); i++) {
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struct regulator_dev *regulator;
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config.regmap = rt5033->regmap;
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regulator = devm_regulator_register(&pdev->dev,
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&rt5033_supported_regulators[i], &config);
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if (IS_ERR(regulator)) {
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ret = PTR_ERR(regulator);
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dev_err(&pdev->dev,
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"Regulator init failed %d: with error: %d\n",
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i, ret);
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return ret;
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}
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}
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return 0;
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}
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static const struct platform_device_id rt5033_regulator_id[] = {
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{ "rt5033-regulator", },
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{ }
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};
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MODULE_DEVICE_TABLE(platform, rt5033_regulator_id);
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static struct platform_driver rt5033_regulator_driver = {
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.driver = {
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.name = "rt5033-regulator",
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},
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.probe = rt5033_regulator_probe,
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.id_table = rt5033_regulator_id,
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};
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module_platform_driver(rt5033_regulator_driver);
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MODULE_DESCRIPTION("Richtek RT5033 Regulator driver");
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MODULE_AUTHOR("Beomho Seo <beomho.seo@samsung.com>");
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MODULE_LICENSE("GPL");
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