Quelle  wm8731-i2c.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0-only
/*
 * wm8731-i2c.c  --  WM8731 ALSA SoC Audio driver I2C code
 *
 * Copyright 2005 Openedhand Ltd.
 * Copyright 2006-12 Wolfson Microelectronics, plc
 *
 * Author: Richard Purdie <richard@openedhand.com>
 *
 * Based on wm8753.c by Liam Girdwood
 */

#include <linux/i2c.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>

#include "wm8731.h"


static const struct of_device_id wm8731_of_match[] = {
 { .compatible = "wlf,wm8731", },
 { }
};
MODULE_DEVICE_TABLE(of, wm8731_of_match);

static int wm8731_i2c_probe(struct i2c_client *i2c)
{
 struct wm8731_priv *wm8731;
 int ret;

 wm8731 = devm_kzalloc(&i2c->dev, sizeof(struct wm8731_priv),
         GFP_KERNEL);
 if (wm8731 == NULL)
  return -ENOMEM;

 i2c_set_clientdata(i2c, wm8731);

 wm8731->regmap = devm_regmap_init_i2c(i2c, &wm8731_regmap);
 if (IS_ERR(wm8731->regmap)) {
  ret = PTR_ERR(wm8731->regmap);
  dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
   ret);
  return ret;
 }

 return wm8731_init(&i2c->dev, wm8731);
}

static const struct i2c_device_id wm8731_i2c_id[] = {
 { "wm8731" },
 { }
};
MODULE_DEVICE_TABLE(i2c, wm8731_i2c_id);

static struct i2c_driver wm8731_i2c_driver = {
 .driver = {
  .name = "wm8731",
  .of_match_table = wm8731_of_match,
 },
 .probe = wm8731_i2c_probe,
 .id_table = wm8731_i2c_id,
};

module_i2c_driver(wm8731_i2c_driver);

MODULE_DESCRIPTION("ASoC WM8731 driver - I2C");
MODULE_AUTHOR("Richard Purdie");
MODULE_LICENSE("GPL");