sound/soc/codecs/ads117x.c

   1 /*
   2  * ads117x.c  --  Driver for ads1174/8 ADC chips
   3  *
   4  * Copyright 2009 ShotSpotter Inc.
   5  * Author: Graeme Gregory <gg@slimlogic.co.uk>
   6  *
   7  *  This program is free software; you can redistribute  it and/or modify it
   8  *  under  the terms of  the GNU General  Public License as published by the
   9  *  Free Software Foundation;  either version 2 of the  License, or (at your
  10  *  option) any later version.
  11  */
  12
  13 #include <linux/kernel.h>
  14 #include <linux/slab.h>
  15 #include <linux/init.h>
  16 #include <linux/device.h>
  17 #include <linux/module.h>
  18 #include <sound/core.h>
  19 #include <sound/pcm.h>
  20 #include <sound/initval.h>
  21 #include <sound/soc.h>
  22
  23 #define ADS117X_RATES (SNDRV_PCM_RATE_8000_48000)
  24 #define ADS117X_FORMATS (SNDRV_PCM_FMTBIT_S16_LE)
  25
  26 static struct snd_soc_dai_driver ads117x_dai = {
  27 /* ADC */
  28         .name = "ads117x-hifi",
  29         .capture = {
  30                 .stream_name = "Capture",
  31                 .channels_min = 1,
  32                 .channels_max = 32,
  33                 .rates = ADS117X_RATES,
  34                 .formats = ADS117X_FORMATS,},
  35 };
  36
  37 static struct snd_soc_codec_driver soc_codec_dev_ads117x;
  38
  39 static __devinit int ads117x_probe(struct platform_device *pdev)
  40 {
  41         return snd_soc_register_codec(&pdev->dev,
  42                         &soc_codec_dev_ads117x, &ads117x_dai, 1);
  43 }
  44
  45 static int __devexit ads117x_remove(struct platform_device *pdev)
  46 {
  47         snd_soc_unregister_codec(&pdev->dev);
  48         return 0;
  49 }
  50
  51 static struct platform_driver ads117x_codec_driver = {
  52         .driver = {
  53                         .name = "ads117x-codec",
  54                         .owner = THIS_MODULE,
  55         },
  56
  57         .probe = ads117x_probe,
  58         .remove = __devexit_p(ads117x_remove),
  59 };
  60
  61 static int __init ads117x_init(void)
  62 {
  63         return platform_driver_register(&ads117x_codec_driver);
  64 }
  65 module_init(ads117x_init);
  66
  67 static void __exit ads117x_exit(void)
  68 {
  69         platform_driver_unregister(&ads117x_codec_driver);
  70 }
  71 module_exit(ads117x_exit);
  72
  73 MODULE_DESCRIPTION("ASoC ads117x driver");
  74 MODULE_AUTHOR("Graeme Gregory");
  75 MODULE_LICENSE("GPL");