sound/soc/codecs/wm8782.c

   1 /*
   2  * sound/soc/codecs/wm8782.c
   3  * simple, strap-pin configured 24bit 2ch ADC
   4  *
   5  * Copyright: 2011 Raumfeld GmbH
   6  * Author: Johannes Stezenbach <js@sig21.net>
   7  *
   8  * based on ad73311.c
   9  * Copyright:   Analog Device Inc.
  10  * Author:      Cliff Cai <cliff.cai@analog.com>
  11  *
  12  * This program is free software; you can redistribute  it and/or modify it
  13  * under  the terms of  the GNU General  Public License as published by the
  14  * Free Software Foundation;  either version 2 of the  License, or (at your
  15  * option) any later version.
  16  */
  17
  18 #include <linux/init.h>
  19 #include <linux/slab.h>
  20 #include <linux/module.h>
  21 #include <linux/kernel.h>
  22 #include <linux/device.h>
  23 #include <sound/core.h>
  24 #include <sound/pcm.h>
  25 #include <sound/ac97_codec.h>
  26 #include <sound/initval.h>
  27 #include <sound/soc.h>
  28
  29 static const struct snd_soc_dapm_widget wm8782_dapm_widgets[] = {
  30 SND_SOC_DAPM_INPUT("AINL"),
  31 SND_SOC_DAPM_INPUT("AINR"),
  32 };
  33
  34 static const struct snd_soc_dapm_route wm8782_dapm_routes[] = {
  35         { "Capture", NULL, "AINL" },
  36         { "Capture", NULL, "AINR" },
  37 };
  38
  39 static struct snd_soc_dai_driver wm8782_dai = {
  40         .name = "wm8782",
  41         .capture = {
  42                 .stream_name = "Capture",
  43                 .channels_min = 2,
  44                 .channels_max = 2,
  45                 /* For configurations with FSAMPEN=0 */
  46                 .rates = SNDRV_PCM_RATE_8000_48000,
  47                 .formats = SNDRV_PCM_FMTBIT_S16_LE |
  48                            SNDRV_PCM_FMTBIT_S20_3LE |
  49                            SNDRV_PCM_FMTBIT_S24_LE,
  50         },
  51 };
  52
  53 static const struct snd_soc_component_driver soc_component_dev_wm8782 = {
  54         .dapm_widgets           = wm8782_dapm_widgets,
  55         .num_dapm_widgets       = ARRAY_SIZE(wm8782_dapm_widgets),
  56         .dapm_routes            = wm8782_dapm_routes,
  57         .num_dapm_routes        = ARRAY_SIZE(wm8782_dapm_routes),
  58         .idle_bias_on           = 1,
  59         .use_pmdown_time        = 1,
  60         .endianness             = 1,
  61         .non_legacy_dai_naming  = 1,
  62 };
  63
  64 static int wm8782_probe(struct platform_device *pdev)
  65 {
  66         return devm_snd_soc_register_component(&pdev->dev,
  67                         &soc_component_dev_wm8782, &wm8782_dai, 1);
  68 }
  69
  70 #ifdef CONFIG_OF
  71 static const struct of_device_id wm8782_of_match[] = {
  72         { .compatible = "wlf,wm8782", },
  73         { }
  74 };
  75 MODULE_DEVICE_TABLE(of, wm8782_of_match);
  76 #endif
  77
  78 static struct platform_driver wm8782_codec_driver = {
  79         .driver = {
  80                 .name = "wm8782",
  81                 .of_match_table = of_match_ptr(wm8782_of_match),
  82         },
  83         .probe = wm8782_probe,
  84 };
  85
  86 module_platform_driver(wm8782_codec_driver);
  87
  88 MODULE_DESCRIPTION("ASoC WM8782 driver");
  89 MODULE_AUTHOR("Johannes Stezenbach <js@sig21.net>");
  90 MODULE_LICENSE("GPL");