wm8350-i2c.c

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/*
 * wm8350-i2c.c  --  Generic I2C driver for Wolfson WM8350 PMIC
 *
 * Copyright 2007, 2008 Wolfson Microelectronics PLC.
 *
 * Author: Liam Girdwood
 *         [email protected]
 *
 *  This program is free software; you can redistribute  it and/or modify it
 *  under  the terms of  the GNU General  Public License as published by the
 *  Free Software Foundation;  either version 2 of the  License, or (at your
 *  option) any later version.
 *
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/err.h>
#include <linux/init.h>
#include <linux/i2c.h>
#include <linux/platform_device.h>
#include <linux/mfd/wm8350/core.h>
#include <linux/regmap.h>
#include <linux/slab.h>

static int wm8350_i2c_probe(struct i2c_client *i2c,
                const struct i2c_device_id *id)
{
    struct wm8350 *wm8350;
    int ret = 0;

    wm8350 = devm_kzalloc(&i2c->dev, sizeof(struct wm8350), GFP_KERNEL);
    if (wm8350 == NULL)
        return -ENOMEM;

    wm8350->regmap = devm_regmap_init_i2c(i2c, &wm8350_regmap);
    if (IS_ERR(wm8350->regmap)) {
        ret = PTR_ERR(wm8350->regmap);
        dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
            ret);
        return ret;
    }

    i2c_set_clientdata(i2c, wm8350);
    wm8350->dev = &i2c->dev;

    return wm8350_device_init(wm8350, i2c->irq, i2c->dev.platform_data);
}

static int wm8350_i2c_remove(struct i2c_client *i2c)
{
    struct wm8350 *wm8350 = i2c_get_clientdata(i2c);

    wm8350_device_exit(wm8350);

    return 0;
}

static const struct i2c_device_id wm8350_i2c_id[] = {
       { "wm8350", 0 },
       { "wm8351", 0 },
       { "wm8352", 0 },
       { }
};
MODULE_DEVICE_TABLE(i2c, wm8350_i2c_id);


static struct i2c_driver wm8350_i2c_driver = {
    .driver = {
           .name = "wm8350",
           .owner = THIS_MODULE,
    },
    .probe = wm8350_i2c_probe,
    .remove = wm8350_i2c_remove,
    .id_table = wm8350_i2c_id,
};

static int __init wm8350_i2c_init(void)
{
    return i2c_add_driver(&wm8350_i2c_driver);
}
/* init early so consumer devices can complete system boot */
subsys_initcall(wm8350_i2c_init);

static void __exit wm8350_i2c_exit(void)
{
    i2c_del_driver(&wm8350_i2c_driver);
}
module_exit(wm8350_i2c_exit);

MODULE_DESCRIPTION("I2C support for the WM8350 AudioPlus PMIC");
MODULE_LICENSE("GPL");