sound/soc/codecs/wm8731-spi.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * wm8731.c  --  WM8731 ALSA SoC Audio driver
   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/spi/spi.h>
  14 #include <linux/module.h>
  15 #include <linux/of_device.h>
  16
  17 #include "wm8731.h"
  18
  19 static const struct of_device_id wm8731_of_match[] = {
  20         { .compatible = "wlf,wm8731", },
  21         { }
  22 };
  23 MODULE_DEVICE_TABLE(of, wm8731_of_match);
  24
  25 static int wm8731_spi_probe(struct spi_device *spi)
  26 {
  27         struct wm8731_priv *wm8731;
  28         int ret;
  29
  30         wm8731 = devm_kzalloc(&spi->dev, sizeof(*wm8731), GFP_KERNEL);
  31         if (wm8731 == NULL)
  32                 return -ENOMEM;
  33
  34         spi_set_drvdata(spi, wm8731);
  35
  36         wm8731->regmap = devm_regmap_init_spi(spi, &wm8731_regmap);
  37         if (IS_ERR(wm8731->regmap)) {
  38                 ret = PTR_ERR(wm8731->regmap);
  39                 dev_err(&spi->dev, "Failed to allocate register map: %d\n",
  40                         ret);
  41                 return ret;
  42         }
  43
  44         return wm8731_init(&spi->dev, wm8731);
  45 }
  46
  47 static struct spi_driver wm8731_spi_driver = {
  48         .driver = {
  49                 .name   = "wm8731",
  50                 .of_match_table = wm8731_of_match,
  51         },
  52         .probe          = wm8731_spi_probe,
  53 };
  54
  55 module_spi_driver(wm8731_spi_driver);
  56
  57 MODULE_DESCRIPTION("ASoC WM8731 driver - SPI");
  58 MODULE_AUTHOR("Richard Purdie");
  59 MODULE_LICENSE("GPL");