// SPDX-License-Identifier: GPL-2.0-or-later
 /* I2C access for DA9055 PMICs.
 *
 * Copyright(c) 2012 Dialog Semiconductor Ltd.
 *
 * Author: David Dajun Chen <dchen@diasemi.com>
 */

#include <linux/module.h>
#include <linux/device.h>
#include <linux/i2c.h>
#include <linux/err.h>
#include <linux/of.h>

#include <linux/mfd/da9055/core.h>

static int da9055_i2c_probe(struct i2c_client *i2c)
{
        struct da9055 *da9055;
        int ret;

        da9055 = devm_kzalloc(&i2c->dev, sizeof(struct da9055), GFP_KERNEL);
        if (!da9055)
                return -ENOMEM;

        da9055->regmap = devm_regmap_init_i2c(i2c, &da9055_regmap_config);
        if (IS_ERR(da9055->regmap)) {
                ret = PTR_ERR(da9055->regmap);
                dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
                        ret);
                return ret;
        }

        da9055->dev = &i2c->dev;
        da9055->chip_irq = i2c->irq;

        i2c_set_clientdata(i2c, da9055);

        return da9055_device_init(da9055);
}

static void da9055_i2c_remove(struct i2c_client *i2c)
{
        struct da9055 *da9055 = i2c_get_clientdata(i2c);

        da9055_device_exit(da9055);
}

/*
 * DO NOT change the device Ids. The naming is intentionally specific as both
 * the PMIC and CODEC parts of this chip are instantiated separately as I2C
 * devices (both have configurable I2C addresses, and are to all intents and
 * purposes separate). As a result there are specific DA9055 ids for PMIC
 * and CODEC, which must be different to operate together.
 */
static const struct i2c_device_id da9055_i2c_id[] = {
        { "da9055-pmic" },
        { }
};
MODULE_DEVICE_TABLE(i2c, da9055_i2c_id);

static const struct of_device_id da9055_of_match[] = {
        { .compatible = "dlg,da9055-pmic", },
        { }
};

static struct i2c_driver da9055_i2c_driver = {
        .probe = da9055_i2c_probe,
        .remove = da9055_i2c_remove,
        .id_table = da9055_i2c_id,
        .driver = {
                .name = "da9055-pmic",
                .of_match_table = da9055_of_match,
        },
};

static int __init da9055_i2c_init(void)
{
        int ret;

        ret = i2c_add_driver(&da9055_i2c_driver);
        if (ret != 0) {
                pr_err("DA9055 I2C registration failed %d\n", ret);
                return ret;
        }

        return 0;
}
subsys_initcall(da9055_i2c_init);

static void __exit da9055_i2c_exit(void)
{
        i2c_del_driver(&da9055_i2c_driver);
}
module_exit(da9055_i2c_exit);

MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
MODULE_DESCRIPTION("I2C driver for Dialog DA9055 PMIC");