sound/soc/codecs/ads117x.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * ads117x.c  --  Driver for ads1174/8 ADC chips
   4  *
   5  * Copyright 2009 ShotSpotter Inc.
   6  * Author: Graeme Gregory <gg@slimlogic.co.uk>
   7  */
   8
   9 #include <linux/kernel.h>
  10 #include <linux/slab.h>
  11 #include <linux/init.h>
  12 #include <linux/device.h>
  13 #include <linux/module.h>
  14 #include <sound/core.h>
  15 #include <sound/pcm.h>
  16 #include <sound/initval.h>
  17 #include <sound/soc.h>
  18
  19 #include <linux/of.h>
  20
  21 #define ADS117X_RATES (SNDRV_PCM_RATE_8000_48000)
  22 #define ADS117X_FORMATS (SNDRV_PCM_FMTBIT_S16_LE)
  23
  24 static const struct snd_soc_dapm_widget ads117x_dapm_widgets[] = {
  25 SND_SOC_DAPM_INPUT("Input1"),
  26 SND_SOC_DAPM_INPUT("Input2"),
  27 SND_SOC_DAPM_INPUT("Input3"),
  28 SND_SOC_DAPM_INPUT("Input4"),
  29 SND_SOC_DAPM_INPUT("Input5"),
  30 SND_SOC_DAPM_INPUT("Input6"),
  31 SND_SOC_DAPM_INPUT("Input7"),
  32 SND_SOC_DAPM_INPUT("Input8"),
  33 };
  34
  35 static const struct snd_soc_dapm_route ads117x_dapm_routes[] = {
  36         { "Capture", NULL, "Input1" },
  37         { "Capture", NULL, "Input2" },
  38         { "Capture", NULL, "Input3" },
  39         { "Capture", NULL, "Input4" },
  40         { "Capture", NULL, "Input5" },
  41         { "Capture", NULL, "Input6" },
  42         { "Capture", NULL, "Input7" },
  43         { "Capture", NULL, "Input8" },
  44 };
  45
  46 static struct snd_soc_dai_driver ads117x_dai = {
  47 /* ADC */
  48         .name = "ads117x-hifi",
  49         .capture = {
  50                 .stream_name = "Capture",
  51                 .channels_min = 1,
  52                 .channels_max = 32,
  53                 .rates = ADS117X_RATES,
  54                 .formats = ADS117X_FORMATS,},
  55 };
  56
  57 static const struct snd_soc_component_driver soc_component_dev_ads117x = {
  58         .dapm_widgets           = ads117x_dapm_widgets,
  59         .num_dapm_widgets       = ARRAY_SIZE(ads117x_dapm_widgets),
  60         .dapm_routes            = ads117x_dapm_routes,
  61         .num_dapm_routes        = ARRAY_SIZE(ads117x_dapm_routes),
  62         .idle_bias_on           = 1,
  63         .use_pmdown_time        = 1,
  64         .endianness             = 1,
  65 };
  66
  67 static int ads117x_probe(struct platform_device *pdev)
  68 {
  69         return devm_snd_soc_register_component(&pdev->dev,
  70                         &soc_component_dev_ads117x, &ads117x_dai, 1);
  71 }
  72
  73 #if defined(CONFIG_OF)
  74 static const struct of_device_id ads117x_dt_ids[] = {
  75         { .compatible = "ti,ads1174" },
  76         { .compatible = "ti,ads1178" },
  77         { },
  78 };
  79 MODULE_DEVICE_TABLE(of, ads117x_dt_ids);
  80 #endif
  81
  82 static struct platform_driver ads117x_codec_driver = {
  83         .driver = {
  84                         .name = "ads117x-codec",
  85                         .of_match_table = of_match_ptr(ads117x_dt_ids),
  86         },
  87
  88         .probe = ads117x_probe,
  89 };
  90
  91 module_platform_driver(ads117x_codec_driver);
  92
  93 MODULE_DESCRIPTION("ASoC ads117x driver");
  94 MODULE_AUTHOR("Graeme Gregory");
  95 MODULE_LICENSE("GPL");