// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * MFD driver for Active-semi ACT8945a PMIC
 *
 * Copyright (C) 2015 Atmel Corporation.
 *
 * Author: Wenyou Yang <wenyou.yang@atmel.com>
 */

#include <linux/i2c.h>
#include <linux/mfd/core.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/regmap.h>

static const struct mfd_cell act8945a_devs[] = {
        {
                .name = "act8945a-regulator",
        },
        {
                .name = "act8945a-charger",
                .of_compatible = "active-semi,act8945a-charger",
        },
};

static const struct regmap_config act8945a_regmap_config = {
        .reg_bits = 8,
        .val_bits = 8,
};

static int act8945a_i2c_probe(struct i2c_client *i2c)
{
        int ret;
        struct regmap *regmap;

        regmap = devm_regmap_init_i2c(i2c, &act8945a_regmap_config);
        if (IS_ERR(regmap)) {
                ret = PTR_ERR(regmap);
                dev_err(&i2c->dev, "regmap init failed: %d\n", ret);
                return ret;
        }

        i2c_set_clientdata(i2c, regmap);

        ret = devm_mfd_add_devices(&i2c->dev, PLATFORM_DEVID_NONE,
                                   act8945a_devs, ARRAY_SIZE(act8945a_devs),
                                   NULL, 0, NULL);
        if (ret) {
                dev_err(&i2c->dev, "Failed to add sub devices\n");
                return ret;
        }

        return 0;
}

static const struct i2c_device_id act8945a_i2c_id[] = {
        { "act8945a" },
        {}
};
MODULE_DEVICE_TABLE(i2c, act8945a_i2c_id);

static const struct of_device_id act8945a_of_match[] = {
        { .compatible = "active-semi,act8945a", },
        {},
};
MODULE_DEVICE_TABLE(of, act8945a_of_match);

static struct i2c_driver act8945a_i2c_driver = {
        .driver = {
                   .name = "act8945a",
                   .of_match_table = act8945a_of_match,
        },
        .probe = act8945a_i2c_probe,
        .id_table = act8945a_i2c_id,
};

static int __init act8945a_i2c_init(void)
{
        return i2c_add_driver(&act8945a_i2c_driver);
}
subsys_initcall(act8945a_i2c_init);

static void __exit act8945a_i2c_exit(void)
{
        i2c_del_driver(&act8945a_i2c_driver);
}
module_exit(act8945a_i2c_exit);

MODULE_DESCRIPTION("ACT8945A PMIC multi-function driver");
MODULE_AUTHOR("Wenyou Yang <wenyou.yang@atmel.com>");
MODULE_LICENSE("GPL");