sound/soc/codecs/wm8727.c

   1 /*
   2  * wm8727.c
   3  *
   4  *  Created on: 15-Oct-2009
   5  *      Author: neil.jones@imgtec.com
   6  *
   7  * Copyright (C) 2009 Imagination Technologies Ltd.
   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 #include <linux/init.h>
  16 #include <linux/slab.h>
  17 #include <linux/module.h>
  18 #include <linux/kernel.h>
  19 #include <linux/device.h>
  20 #include <sound/core.h>
  21 #include <sound/pcm.h>
  22 #include <sound/initval.h>
  23 #include <sound/soc.h>
  24
  25 static const struct snd_soc_dapm_widget wm8727_dapm_widgets[] = {
  26 SND_SOC_DAPM_OUTPUT("VOUTL"),
  27 SND_SOC_DAPM_OUTPUT("VOUTR"),
  28 };
  29
  30 static const struct snd_soc_dapm_route wm8727_dapm_routes[] = {
  31         { "VOUTL", NULL, "Playback" },
  32         { "VOUTR", NULL, "Playback" },
  33 };
  34
  35 /*
  36  * Note this is a simple chip with no configuration interface, sample rate is
  37  * determined automatically by examining the Master clock and Bit clock ratios
  38  */
  39 #define WM8727_RATES  (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |\
  40                         SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_96000 |\
  41                         SNDRV_PCM_RATE_192000)
  42
  43 static struct snd_soc_dai_driver wm8727_dai = {
  44         .name = "wm8727-hifi",
  45         .playback = {
  46                 .stream_name = "Playback",
  47                 .channels_min = 2,
  48                 .channels_max = 2,
  49                 .rates = WM8727_RATES,
  50                 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE,
  51                 },
  52 };
  53
  54 static const struct snd_soc_component_driver soc_component_dev_wm8727 = {
  55         .dapm_widgets           = wm8727_dapm_widgets,
  56         .num_dapm_widgets       = ARRAY_SIZE(wm8727_dapm_widgets),
  57         .dapm_routes            = wm8727_dapm_routes,
  58         .num_dapm_routes        = ARRAY_SIZE(wm8727_dapm_routes),
  59         .idle_bias_on           = 1,
  60         .use_pmdown_time        = 1,
  61         .endianness             = 1,
  62         .non_legacy_dai_naming  = 1,
  63 };
  64
  65 static int wm8727_probe(struct platform_device *pdev)
  66 {
  67         return devm_snd_soc_register_component(&pdev->dev,
  68                         &soc_component_dev_wm8727, &wm8727_dai, 1);
  69 }
  70
  71 static struct platform_driver wm8727_codec_driver = {
  72         .driver = {
  73                         .name = "wm8727",
  74         },
  75
  76         .probe = wm8727_probe,
  77 };
  78
  79 module_platform_driver(wm8727_codec_driver);
  80
  81 MODULE_DESCRIPTION("ASoC wm8727 driver");
  82 MODULE_AUTHOR("Neil Jones");
  83 MODULE_LICENSE("GPL");