LXR linux/drivers/mfd/wm8350-i2c.c

   1/*
   2 * wm8350-i2c.c  --  Generic I2C driver for Wolfson WM8350 PMIC
   3 *
   4 * Copyright 2007, 2008 Wolfson Microelectronics PLC.
   5 *
   6 * Author: Liam Girdwood
   7 *         linux@wolfsonmicro.com
   8 *
   9 *  This program is free software; you can redistribute  it and/or modify it
  10 *  under  the terms of  the GNU General  Public License as published by the
  11 *  Free Software Foundation;  either version 2 of the  License, or (at your
  12 *  option) any later version.
  13 *
  14 */
  15
  16#include <linux/module.h>
  17#include <linux/moduleparam.h>
  18#include <linux/err.h>
  19#include <linux/init.h>
  20#include <linux/i2c.h>
  21#include <linux/platform_device.h>
  22#include <linux/mfd/wm8350/core.h>
  23#include <linux/regmap.h>
  24#include <linux/slab.h>
  25
  26static int wm8350_i2c_probe(struct i2c_client *i2c,
  27                            const struct i2c_device_id *id)
  28{
  29        struct wm8350 *wm8350;
  30        int ret = 0;
  31
  32        wm8350 = devm_kzalloc(&i2c->dev, sizeof(struct wm8350), GFP_KERNEL);
  33        if (wm8350 == NULL)
  34                return -ENOMEM;
  35
  36        wm8350->regmap = devm_regmap_init_i2c(i2c, &wm8350_regmap);
  37        if (IS_ERR(wm8350->regmap)) {
  38                ret = PTR_ERR(wm8350->regmap);
  39                dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
  40                        ret);
  41                return ret;
  42        }
  43
  44        i2c_set_clientdata(i2c, wm8350);
  45        wm8350->dev = &i2c->dev;
  46
  47        return wm8350_device_init(wm8350, i2c->irq, i2c->dev.platform_data);
  48}
  49
  50static int wm8350_i2c_remove(struct i2c_client *i2c)
  51{
  52        struct wm8350 *wm8350 = i2c_get_clientdata(i2c);
  53
  54        wm8350_device_exit(wm8350);
  55
  56        return 0;
  57}
  58
  59static const struct i2c_device_id wm8350_i2c_id[] = {
  60       { "wm8350", 0 },
  61       { "wm8351", 0 },
  62       { "wm8352", 0 },
  63       { }
  64};
  65MODULE_DEVICE_TABLE(i2c, wm8350_i2c_id);
  66
  67
  68static struct i2c_driver wm8350_i2c_driver = {
  69        .driver = {
  70                   .name = "wm8350",
  71                   .owner = THIS_MODULE,
  72        },
  73        .probe = wm8350_i2c_probe,
  74        .remove = wm8350_i2c_remove,
  75        .id_table = wm8350_i2c_id,
  76};
  77
  78static int __init wm8350_i2c_init(void)
  79{
  80        return i2c_add_driver(&wm8350_i2c_driver);
  81}
  82/* init early so consumer devices can complete system boot */
  83subsys_initcall(wm8350_i2c_init);
  84
  85static void __exit wm8350_i2c_exit(void)
  86{
  87        i2c_del_driver(&wm8350_i2c_driver);
  88}
  89module_exit(wm8350_i2c_exit);
  90
  91MODULE_DESCRIPTION("I2C support for the WM8350 AudioPlus PMIC");
  92MODULE_LICENSE("GPL");
  93