sound/soc/codecs/wm8731-i2c.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * wm8731-i2c.c  --  WM8731 ALSA SoC Audio driver I2C code
   4  *
   5  * Copyright 2005 Openedhand Ltd.
   6  * Copyright 2006-12 Wolfson Microelectronics, plc
   7  *
   8  * Author: Richard Purdie <richard@openedhand.com>
   9  *
  10  * Based on wm8753.c by Liam Girdwood
  11  */
  12
  13 #include <linux/i2c.h>
  14 #include <linux/module.h>
  15 #include <linux/of_device.h>
  16
  17 #include "wm8731.h"
  18
  19
  20 static const struct of_device_id wm8731_of_match[] = {
  21         { .compatible = "wlf,wm8731", },
  22         { }
  23 };
  24 MODULE_DEVICE_TABLE(of, wm8731_of_match);
  25
  26 static int wm8731_i2c_probe(struct i2c_client *i2c)
  27 {
  28         struct wm8731_priv *wm8731;
  29         int ret;
  30
  31         wm8731 = devm_kzalloc(&i2c->dev, sizeof(struct wm8731_priv),
  32                               GFP_KERNEL);
  33         if (wm8731 == NULL)
  34                 return -ENOMEM;
  35
  36         i2c_set_clientdata(i2c, wm8731);
  37
  38         wm8731->regmap = devm_regmap_init_i2c(i2c, &wm8731_regmap);
  39         if (IS_ERR(wm8731->regmap)) {
  40                 ret = PTR_ERR(wm8731->regmap);
  41                 dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
  42                         ret);
  43                 return ret;
  44         }
  45
  46         return wm8731_init(&i2c->dev, wm8731);
  47 }
  48
  49 static const struct i2c_device_id wm8731_i2c_id[] = {
  50         { "wm8731", 0 },
  51         { }
  52 };
  53 MODULE_DEVICE_TABLE(i2c, wm8731_i2c_id);
  54
  55 static struct i2c_driver wm8731_i2c_driver = {
  56         .driver = {
  57                 .name = "wm8731",
  58                 .of_match_table = wm8731_of_match,
  59         },
  60         .probe_new = wm8731_i2c_probe,
  61         .id_table = wm8731_i2c_id,
  62 };
  63
  64 module_i2c_driver(wm8731_i2c_driver);
  65
  66 MODULE_DESCRIPTION("ASoC WM8731 driver - I2C");
  67 MODULE_AUTHOR("Richard Purdie");
  68 MODULE_LICENSE("GPL");