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// SPDX-License-Identifier: GPL-2.0-only
/*
 * Regulator driver for the Richtek RT5033
 *
 * Copyright (C) 2014 Samsung Electronics, Co., Ltd.
 * Author: Beomho Seo <beomho.seo@samsung.com>
 */

#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/mfd/rt5033.h>
#include <linux/mfd/rt5033-private.h>
#include <linux/regulator/of_regulator.h>

static const struct linear_range rt5033_buck_ranges[] = {
 REGULATOR_LINEAR_RANGE(1000000, 0, 20, 100000),
 REGULATOR_LINEAR_RANGE(3000000, 21, 31, 0),
};

static const struct linear_range rt5033_ldo_ranges[] = {
 REGULATOR_LINEAR_RANGE(1200000, 0, 18, 100000),
 REGULATOR_LINEAR_RANGE(3000000, 19, 31, 0),
};

static const struct regulator_ops rt5033_safe_ldo_ops = {
 .is_enabled  = regulator_is_enabled_regmap,
 .enable   = regulator_enable_regmap,
 .disable  = regulator_disable_regmap,
 .list_voltage  = regulator_list_voltage_linear,
};

static const struct regulator_ops rt5033_buck_ops = {
 .is_enabled  = regulator_is_enabled_regmap,
 .enable   = regulator_enable_regmap,
 .disable  = regulator_disable_regmap,
 .list_voltage  = regulator_list_voltage_linear_range,
 .get_voltage_sel = regulator_get_voltage_sel_regmap,
 .set_voltage_sel = regulator_set_voltage_sel_regmap,
};

static const struct regulator_desc rt5033_supported_regulators[] = {
 [RT5033_BUCK] = {
  .name  = "BUCK",
  .of_match = of_match_ptr("BUCK"),
  .regulators_node = of_match_ptr("regulators"),
  .id  = RT5033_BUCK,
  .ops  = &rt5033_buck_ops,
  .type  = REGULATOR_VOLTAGE,
  .owner  = THIS_MODULE,
  .n_voltages = RT5033_REGULATOR_BUCK_VOLTAGE_STEP_NUM,
  .linear_ranges = rt5033_buck_ranges,
  .n_linear_ranges = ARRAY_SIZE(rt5033_buck_ranges),
  .enable_reg = RT5033_REG_CTRL,
  .enable_mask = RT5033_CTRL_EN_BUCK_MASK,
  .vsel_reg = RT5033_REG_BUCK_CTRL,
  .vsel_mask = RT5033_BUCK_CTRL_MASK,
 },
 [RT5033_LDO] = {
  .name  = "LDO",
  .of_match = of_match_ptr("LDO"),
  .regulators_node = of_match_ptr("regulators"),
  .id  = RT5033_LDO,
  .ops  = &rt5033_buck_ops,
  .type  = REGULATOR_VOLTAGE,
  .owner  = THIS_MODULE,
  .n_voltages = RT5033_REGULATOR_LDO_VOLTAGE_STEP_NUM,
  .linear_ranges = rt5033_ldo_ranges,
  .n_linear_ranges = ARRAY_SIZE(rt5033_ldo_ranges),
  .enable_reg = RT5033_REG_CTRL,
  .enable_mask = RT5033_CTRL_EN_LDO_MASK,
  .vsel_reg = RT5033_REG_LDO_CTRL,
  .vsel_mask = RT5033_LDO_CTRL_MASK,
 },
 [RT5033_SAFE_LDO] = {
  .name  = "SAFE_LDO",
  .of_match = of_match_ptr("SAFE_LDO"),
  .regulators_node = of_match_ptr("regulators"),
  .id  = RT5033_SAFE_LDO,
  .ops  = &rt5033_safe_ldo_ops,
  .type  = REGULATOR_VOLTAGE,
  .owner  = THIS_MODULE,
  .n_voltages = 1,
  .min_uV  = RT5033_REGULATOR_SAFE_LDO_VOLTAGE,
  .enable_reg = RT5033_REG_CTRL,
  .enable_mask = RT5033_CTRL_EN_SAFE_LDO_MASK,
 },
};

static int rt5033_regulator_probe(struct platform_device *pdev)
{
 struct rt5033_dev *rt5033 = dev_get_drvdata(pdev->dev.parent);
 int ret, i;
 struct regulator_config config = {};

 config.dev = rt5033->dev;
 config.driver_data = rt5033;

 for (i = 0; i < ARRAY_SIZE(rt5033_supported_regulators); i++) {
  struct regulator_dev *regulator;

  config.regmap = rt5033->regmap;

  regulator = devm_regulator_register(&pdev->dev,
    &rt5033_supported_regulators[i], &config);
  if (IS_ERR(regulator)) {
   ret = PTR_ERR(regulator);
   dev_err(&pdev->dev,
    "Regulator init failed %d: with error: %d\n",
    i, ret);
   return ret;
  }
 }

 return 0;
}

static const struct platform_device_id rt5033_regulator_id[] = {
 { "rt5033-regulator", },
 { }
};
MODULE_DEVICE_TABLE(platform, rt5033_regulator_id);

static struct platform_driver rt5033_regulator_driver = {
 .driver = {
  .name = "rt5033-regulator",
  .probe_type = PROBE_PREFER_ASYNCHRONOUS,
 },
 .probe  = rt5033_regulator_probe,
 .id_table = rt5033_regulator_id,
};
module_platform_driver(rt5033_regulator_driver);

MODULE_DESCRIPTION("Richtek RT5033 Regulator driver");
MODULE_AUTHOR("Beomho Seo <beomho.seo@samsung.com>");
MODULE_LICENSE("GPL");