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/acpi.h>
  11 #include <linux/init.h>
  12 #include <linux/module.h>
  13 #include <linux/of.h>
  14 #include <linux/platform_device.h>
  15
  16 #include <sound/soc.h>
  17
  18 static const struct snd_soc_dapm_widget adau7002_widgets[] = {
  19         SND_SOC_DAPM_INPUT("PDM_DAT"),
  20         SND_SOC_DAPM_REGULATOR_SUPPLY("IOVDD", 0, 0),
  21 };
  22
  23 static const struct snd_soc_dapm_route adau7002_routes[] = {
  24         { "Capture", NULL, "PDM_DAT" },
  25         { "Capture", NULL, "IOVDD" },
  26 };
  27
  28 static struct snd_soc_dai_driver adau7002_dai = {
  29         .name = "adau7002-hifi",
  30         .capture = {
  31                 .stream_name = "Capture",
  32                 .channels_min = 2,
  33                 .channels_max = 2,
  34                 .rates = SNDRV_PCM_RATE_8000_96000,
  35                 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S18_3LE |
  36                         SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE |
  37                         SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S32_LE,
  38                 .sig_bits = 20,
  39         },
  40 };
  41
  42 static const struct snd_soc_component_driver adau7002_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         .idle_bias_on           = 1,
  48         .use_pmdown_time        = 1,
  49         .endianness             = 1,
  50         .non_legacy_dai_naming  = 1,
  51 };
  52
  53 static int adau7002_probe(struct platform_device *pdev)
  54 {
  55         return devm_snd_soc_register_component(&pdev->dev,
  56                         &adau7002_component_driver,
  57                         &adau7002_dai, 1);
  58 }
  59
  60 static int adau7002_remove(struct platform_device *pdev)
  61 {
  62         return 0;
  63 }
  64
  65 #ifdef CONFIG_OF
  66 static const struct of_device_id adau7002_dt_ids[] = {
  67         { .compatible = "adi,adau7002", },
  68         { }
  69 };
  70 MODULE_DEVICE_TABLE(of, adau7002_dt_ids);
  71 #endif
  72
  73 #ifdef CONFIG_ACPI
  74 static const struct acpi_device_id adau7002_acpi_match[] = {
  75         { "ADAU7002", 0 },
  76         {},
  77 };
  78 MODULE_DEVICE_TABLE(acpi, adau7002_acpi_match);
  79 #endif
  80
  81 static struct platform_driver adau7002_driver = {
  82         .driver = {
  83                 .name = "adau7002",
  84                 .of_match_table = of_match_ptr(adau7002_dt_ids),
  85                 .acpi_match_table = ACPI_PTR(adau7002_acpi_match),
  86         },
  87         .probe = adau7002_probe,
  88         .remove = adau7002_remove,
  89 };
  90 module_platform_driver(adau7002_driver);
  91
  92 MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
  93 MODULE_DESCRIPTION("ADAU7002 Stereo PDM-to-I2S/TDM Converter driver");
  94 MODULE_LICENSE("GPL v2");