// SPDX-License-Identifier: GPL-2.0-only
/*
 * Driver for TPS61050/61052 boost converters, typically used for white LEDs
 * or audio amplifiers.
 *
 * Copyright (C) 2011 ST-Ericsson SA
 * Written on behalf of Linaro for ST-Ericsson
 *
 * Author: Linus Walleij <linus.walleij@linaro.org>
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/err.h>
#include <linux/regmap.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/mfd/core.h>
#include <linux/mfd/tps6105x.h>

static const unsigned int tps6105x_voltages[] = {
        4500000,
        5000000,
        5250000,
        5000000, /* There is an additional 5V */
};

static const struct regulator_ops tps6105x_regulator_ops = {
        .enable         = regulator_enable_regmap,
        .disable        = regulator_disable_regmap,
        .is_enabled     = regulator_is_enabled_regmap,
        .get_voltage_sel = regulator_get_voltage_sel_regmap,
        .set_voltage_sel = regulator_set_voltage_sel_regmap,
        .list_voltage   = regulator_list_voltage_table,
};

static const struct regulator_desc tps6105x_regulator_desc = {
        .name           = "tps6105x-boost",
        .of_match       = of_match_ptr("regulator"),
        .ops            = &tps6105x_regulator_ops,
        .type           = REGULATOR_VOLTAGE,
        .id             = 0,
        .owner          = THIS_MODULE,
        .n_voltages     = ARRAY_SIZE(tps6105x_voltages),
        .volt_table     = tps6105x_voltages,
        .vsel_reg       = TPS6105X_REG_0,
        .vsel_mask      = TPS6105X_REG0_VOLTAGE_MASK,
        .enable_reg     = TPS6105X_REG_0,
        .enable_mask    = TPS6105X_REG0_MODE_MASK,
        .enable_val     = TPS6105X_REG0_MODE_VOLTAGE <<
                          TPS6105X_REG0_MODE_SHIFT,
};

/*
 * Registers the chip as a voltage regulator
 */
static int tps6105x_regulator_probe(struct platform_device *pdev)
{
        struct tps6105x *tps6105x = dev_get_platdata(&pdev->dev);
        struct tps6105x_platform_data *pdata = tps6105x->pdata;
        struct regulator_config config = { };
        int ret;

        /* This instance is not set for regulator mode so bail out */
        if (pdata->mode != TPS6105X_MODE_VOLTAGE) {
                dev_info(&pdev->dev,
                        "chip not in voltage mode mode, exit probe\n");
                return 0;
        }

        config.dev = &tps6105x->client->dev;
        config.init_data = pdata->regulator_data;
        config.driver_data = tps6105x;
        config.of_node = pdev->dev.parent->of_node;
        config.regmap = tps6105x->regmap;

        /* Register regulator with framework */
        tps6105x->regulator = devm_regulator_register(&pdev->dev,
                                                      &tps6105x_regulator_desc,
                                                      &config);
        if (IS_ERR(tps6105x->regulator)) {
                ret = PTR_ERR(tps6105x->regulator);
                dev_err(&tps6105x->client->dev,
                        "failed to register regulator\n");
                return ret;
        }
        platform_set_drvdata(pdev, tps6105x);

        return 0;
}

static struct platform_driver tps6105x_regulator_driver = {
        .driver = {
                .name  = "tps6105x-regulator",
                .probe_type = PROBE_PREFER_ASYNCHRONOUS,
        },
        .probe = tps6105x_regulator_probe,
};

static __init int tps6105x_regulator_init(void)
{
        return platform_driver_register(&tps6105x_regulator_driver);
}
subsys_initcall(tps6105x_regulator_init);

static __exit void tps6105x_regulator_exit(void)
{
        platform_driver_unregister(&tps6105x_regulator_driver);
}
module_exit(tps6105x_regulator_exit);

MODULE_AUTHOR("Linus Walleij <linus.walleij@linaro.org>");
MODULE_DESCRIPTION("TPS6105x regulator driver");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:tps6105x-regulator");