sound/soc/codecs/adau7002.c

   1 /*
   2  * ADAU7002 Stereo PDM-to-I2S/TDM converter driver
   3  *
   4  * Copyright 2014-2016 Analog Devices
   5  *  Author: Lars-Peter Clausen <lars@metafoo.de>
   6  *
   7  * Licensed under the GPL-2.
   8  */
   9
  10 #include <linux/init.h>
  11 #include <linux/module.h>
  12 #include <linux/of.h>
  13 #include <linux/platform_device.h>
  14
  15 #include <sound/soc.h>
  16
  17 static const struct snd_soc_dapm_widget adau7002_widgets[] = {
  18         SND_SOC_DAPM_INPUT("PDM_DAT"),
  19         SND_SOC_DAPM_REGULATOR_SUPPLY("IOVDD", 0, 0),
  20 };
  21
  22 static const struct snd_soc_dapm_route adau7002_routes[] = {
  23         { "Capture", NULL, "PDM_DAT" },
  24         { "Capture", NULL, "IOVDD" },
  25 };
  26
  27 static struct snd_soc_dai_driver adau7002_dai = {
  28         .name = "adau7002-hifi",
  29         .capture = {
  30                 .stream_name = "Capture",
  31                 .channels_min = 2,
  32                 .channels_max = 2,
  33                 .rates = SNDRV_PCM_RATE_8000_96000,
  34                 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S18_3LE |
  35                         SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE |
  36                         SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S32_LE,
  37                 .sig_bits = 20,
  38         },
  39 };
  40
  41 static const struct snd_soc_codec_driver adau7002_codec_driver = {
  42         .component_driver = {
  43                 .dapm_widgets           = adau7002_widgets,
  44                 .num_dapm_widgets       = ARRAY_SIZE(adau7002_widgets),
  45                 .dapm_routes            = adau7002_routes,
  46                 .num_dapm_routes        = ARRAY_SIZE(adau7002_routes),
  47         },
  48 };
  49
  50 static int adau7002_probe(struct platform_device *pdev)
  51 {
  52         return snd_soc_register_codec(&pdev->dev, &adau7002_codec_driver,
  53                         &adau7002_dai, 1);
  54 }
  55
  56 static int adau7002_remove(struct platform_device *pdev)
  57 {
  58         snd_soc_unregister_codec(&pdev->dev);
  59         return 0;
  60 }
  61
  62 #ifdef CONFIG_OF
  63 static const struct of_device_id adau7002_dt_ids[] = {
  64         { .compatible = "adi,adau7002", },
  65         { }
  66 };
  67 MODULE_DEVICE_TABLE(of, adau7002_dt_ids);
  68 #endif
  69
  70 static struct platform_driver adau7002_driver = {
  71         .driver = {
  72                 .name = "adau7002",
  73                 .of_match_table = of_match_ptr(adau7002_dt_ids),
  74         },
  75         .probe = adau7002_probe,
  76         .remove = adau7002_remove,
  77 };
  78 module_platform_driver(adau7002_driver);
  79
  80 MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
  81 MODULE_DESCRIPTION("ADAU7002 Stereo PDM-to-I2S/TDM Converter driver");
  82 MODULE_LICENSE("GPL v2");