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/err.h>
  17 #include <linux/init.h>
  18 #include <linux/i2c.h>
  19 #include <linux/platform_device.h>
  20 #include <linux/mfd/wm8350/core.h>
  21 #include <linux/regmap.h>
  22 #include <linux/slab.h>
  23
  24 static int wm8350_i2c_probe(struct i2c_client *i2c,
  25                             const struct i2c_device_id *id)
  26 {
  27         struct wm8350 *wm8350;
  28         struct wm8350_platform_data *pdata = dev_get_platdata(&i2c->dev);
  29         int ret = 0;
  30
  31         wm8350 = devm_kzalloc(&i2c->dev, sizeof(struct wm8350), GFP_KERNEL);
  32         if (wm8350 == NULL)
  33                 return -ENOMEM;
  34
  35         wm8350->regmap = devm_regmap_init_i2c(i2c, &wm8350_regmap);
  36         if (IS_ERR(wm8350->regmap)) {
  37                 ret = PTR_ERR(wm8350->regmap);
  38                 dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
  39                         ret);
  40                 return ret;
  41         }
  42
  43         i2c_set_clientdata(i2c, wm8350);
  44         wm8350->dev = &i2c->dev;
  45
  46         return wm8350_device_init(wm8350, i2c->irq, pdata);
  47 }
  48
  49 static const struct i2c_device_id wm8350_i2c_id[] = {
  50         { "wm8350", 0 },
  51         { "wm8351", 0 },
  52         { "wm8352", 0 },
  53         { }
  54 };
  55
  56 static struct i2c_driver wm8350_i2c_driver = {
  57         .driver = {
  58                    .name = "wm8350",
  59                    .suppress_bind_attrs = true,
  60         },
  61         .probe = wm8350_i2c_probe,
  62         .id_table = wm8350_i2c_id,
  63 };
  64
  65 static int __init wm8350_i2c_init(void)
  66 {
  67         return i2c_add_driver(&wm8350_i2c_driver);
  68 }
  69 /* init early so consumer devices can complete system boot */
  70 subsys_initcall(wm8350_i2c_init);