sound/soc/codecs/gtm601.c

   1 /*
   2  * This is a simple driver for the GTM601 Voice PCM interface
   3  *
   4  * Copyright (C) 2015 Goldelico GmbH
   5  *
   6  * Author: Marek Belisko <marek@goldelico.com>
   7  *
   8  * Based on wm8727.c driver
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License version 2 as
  12  * published by the Free Software Foundation.
  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 gtm601_dapm_widgets[] = {
  26         SND_SOC_DAPM_OUTPUT("AOUT"),
  27         SND_SOC_DAPM_INPUT("AIN"),
  28 };
  29
  30 static const struct snd_soc_dapm_route gtm601_dapm_routes[] = {
  31         { "AOUT", NULL, "Playback" },
  32         { "Capture", NULL, "AIN" },
  33 };
  34
  35 static struct snd_soc_dai_driver gtm601_dai = {
  36         .name = "gtm601",
  37         .playback = {
  38                 .stream_name = "Playback",
  39                 .channels_min = 1,
  40                 .channels_max = 1,
  41                 .rates = SNDRV_PCM_RATE_8000,
  42                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
  43                 },
  44         .capture = {
  45                 .stream_name = "Capture",
  46                 .channels_min = 1,
  47                 .channels_max = 1,
  48                 .rates = SNDRV_PCM_RATE_8000,
  49                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
  50         },
  51 };
  52
  53 static const struct snd_soc_component_driver soc_component_dev_gtm601 = {
  54         .dapm_widgets           = gtm601_dapm_widgets,
  55         .num_dapm_widgets       = ARRAY_SIZE(gtm601_dapm_widgets),
  56         .dapm_routes            = gtm601_dapm_routes,
  57         .num_dapm_routes        = ARRAY_SIZE(gtm601_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 gtm601_platform_probe(struct platform_device *pdev)
  65 {
  66         return devm_snd_soc_register_component(&pdev->dev,
  67                         &soc_component_dev_gtm601, &gtm601_dai, 1);
  68 }
  69
  70 #if defined(CONFIG_OF)
  71 static const struct of_device_id gtm601_codec_of_match[] = {
  72         { .compatible = "option,gtm601", },
  73         {},
  74 };
  75 MODULE_DEVICE_TABLE(of, gtm601_codec_of_match);
  76 #endif
  77
  78 static struct platform_driver gtm601_codec_driver = {
  79         .driver = {
  80                 .name = "gtm601",
  81                 .of_match_table = of_match_ptr(gtm601_codec_of_match),
  82         },
  83         .probe = gtm601_platform_probe,
  84 };
  85
  86 module_platform_driver(gtm601_codec_driver);
  87
  88 MODULE_DESCRIPTION("ASoC gtm601 driver");
  89 MODULE_AUTHOR("Marek Belisko <marek@goldelico.com>");
  90 MODULE_LICENSE("GPL");
  91 MODULE_ALIAS("platform:gtm601");