// SPDX-License-Identifier: GPL-2.0
//
// sky81452-regulator.c SKY81452 regulator driver
//
// Copyright 2014 Skyworks Solutions Inc.
// Author : Gyungoh Yoo <jack.yoo@skyworksinc.com>

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/init.h>
#include <linux/err.h>
#include <linux/of.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/of_regulator.h>

/* registers */
#define SKY81452_REG1   0x01
#define SKY81452_REG3   0x03

/* bit mask */
#define SKY81452_LEN    0x40
#define SKY81452_LOUT   0x1F

static const struct regulator_ops sky81452_reg_ops = {
        .list_voltage = regulator_list_voltage_linear_range,
        .map_voltage = regulator_map_voltage_linear_range,
        .get_voltage_sel = regulator_get_voltage_sel_regmap,
        .set_voltage_sel = regulator_set_voltage_sel_regmap,
        .enable = regulator_enable_regmap,
        .disable = regulator_disable_regmap,
        .is_enabled = regulator_is_enabled_regmap,
};

static const struct linear_range sky81452_reg_ranges[] = {
        REGULATOR_LINEAR_RANGE(4500000, 0, 14, 250000),
        REGULATOR_LINEAR_RANGE(9000000, 15, 31, 1000000),
};

static const struct regulator_desc sky81452_reg = {
        .name = "LOUT",
        .of_match = of_match_ptr("lout"),
        .regulators_node = of_match_ptr("regulator"),
        .ops = &sky81452_reg_ops,
        .type = REGULATOR_VOLTAGE,
        .owner = THIS_MODULE,
        .n_voltages = SKY81452_LOUT + 1,
        .linear_ranges = sky81452_reg_ranges,
        .n_linear_ranges = ARRAY_SIZE(sky81452_reg_ranges),
        .vsel_reg = SKY81452_REG3,
        .vsel_mask = SKY81452_LOUT,
        .enable_reg = SKY81452_REG1,
        .enable_mask = SKY81452_LEN,
};

static int sky81452_reg_probe(struct platform_device *pdev)
{
        struct device *dev = &pdev->dev;
        const struct regulator_init_data *init_data = dev_get_platdata(dev);
        struct regulator_config config = { };
        struct regulator_dev *rdev;

        config.dev = dev->parent;
        config.init_data = init_data;
        config.of_node = dev->of_node;
        config.regmap = dev_get_drvdata(dev->parent);

        rdev = devm_regulator_register(dev, &sky81452_reg, &config);
        if (IS_ERR(rdev)) {
                dev_err(dev, "failed to register. err=%ld\n", PTR_ERR(rdev));
                return PTR_ERR(rdev);
        }

        platform_set_drvdata(pdev, rdev);

        return 0;
}

static struct platform_driver sky81452_reg_driver = {
        .driver = {
                .name = "sky81452-regulator",
                .probe_type = PROBE_PREFER_ASYNCHRONOUS,
        },
        .probe = sky81452_reg_probe,
};

module_platform_driver(sky81452_reg_driver);

MODULE_DESCRIPTION("Skyworks SKY81452 Regulator driver");
MODULE_AUTHOR("Gyungoh Yoo <jack.yoo@skyworksinc.com>");
MODULE_LICENSE("GPL v2");