sound/soc/codecs/ics43432.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * I2S MEMS microphone driver for InvenSense ICS-43432
   4  *
   5  * - Non configurable.
   6  * - I2S interface, 64 BCLs per frame, 32 bits per channel, 24 bit data
   7  *
   8  * Copyright (c) 2015 Axis Communications AB
   9  */
  10
  11 #include <linux/module.h>
  12 #include <linux/init.h>
  13 #include <linux/slab.h>
  14 #include <sound/core.h>
  15 #include <sound/pcm.h>
  16 #include <sound/pcm_params.h>
  17 #include <sound/soc.h>
  18 #include <sound/initval.h>
  19 #include <sound/tlv.h>
  20
  21 #define ICS43432_RATE_MIN 7190 /* Hz, from data sheet */
  22 #define ICS43432_RATE_MAX 52800  /* Hz, from data sheet */
  23
  24 #define ICS43432_FORMATS (SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32)
  25
  26 static struct snd_soc_dai_driver ics43432_dai = {
  27         .name = "ics43432-hifi",
  28         .capture = {
  29                 .stream_name = "Capture",
  30                 .channels_min = 1,
  31                 .channels_max = 2,
  32                 .rate_min = ICS43432_RATE_MIN,
  33                 .rate_max = ICS43432_RATE_MAX,
  34                 .rates = SNDRV_PCM_RATE_CONTINUOUS,
  35                 .formats = ICS43432_FORMATS,
  36         },
  37 };
  38
  39 static const struct snd_soc_component_driver ics43432_component_driver = {
  40         .idle_bias_on           = 1,
  41         .use_pmdown_time        = 1,
  42         .endianness             = 1,
  43         .non_legacy_dai_naming  = 1,
  44 };
  45
  46 static int ics43432_probe(struct platform_device *pdev)
  47 {
  48         return devm_snd_soc_register_component(&pdev->dev,
  49                         &ics43432_component_driver,
  50                         &ics43432_dai, 1);
  51 }
  52
  53 #ifdef CONFIG_OF
  54 static const struct of_device_id ics43432_ids[] = {
  55         { .compatible = "invensense,ics43432", },
  56         { }
  57 };
  58 MODULE_DEVICE_TABLE(of, ics43432_ids);
  59 #endif
  60
  61 static struct platform_driver ics43432_driver = {
  62         .driver = {
  63                 .name = "ics43432",
  64                 .of_match_table = of_match_ptr(ics43432_ids),
  65         },
  66         .probe = ics43432_probe,
  67 };
  68
  69 module_platform_driver(ics43432_driver);
  70
  71 MODULE_DESCRIPTION("ASoC ICS43432 driver");
  72 MODULE_AUTHOR("Ricard Wanderlof <ricardw@axis.com>");
  73 MODULE_LICENSE("GPL v2");