| 1 | /* |
| 2 | * I2S MEMS microphone driver for InvenSense ICS-43432 |
| 3 | * |
| 4 | * - Non configurable. |
| 5 | * - I2S interface, 64 BCLs per frame, 32 bits per channel, 24 bit data |
| 6 | * |
| 7 | * Copyright (c) 2015 Axis Communications AB |
| 8 | * |
| 9 | * Licensed under GPL v2. |
| 10 | */ |
| 11 | |
| 12 | #include <linux/module.h> |
| 13 | #include <linux/init.h> |
| 14 | #include <linux/slab.h> |
| 15 | #include <sound/core.h> |
| 16 | #include <sound/pcm.h> |
| 17 | #include <sound/pcm_params.h> |
| 18 | #include <sound/soc.h> |
| 19 | #include <sound/initval.h> |
| 20 | #include <sound/tlv.h> |
| 21 | |
| 22 | #define ICS43432_RATE_MIN 7190 /* Hz, from data sheet */ |
| 23 | #define ICS43432_RATE_MAX 52800 /* Hz, from data sheet */ |
| 24 | |
| 25 | #define ICS43432_FORMATS (SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32) |
| 26 | |
| 27 | static struct snd_soc_dai_driver ics43432_dai = { |
| 28 | .name = "ics43432-hifi", |
| 29 | .capture = { |
| 30 | .stream_name = "Capture", |
| 31 | .channels_min = 1, |
| 32 | .channels_max = 2, |
| 33 | .rate_min = ICS43432_RATE_MIN, |
| 34 | .rate_max = ICS43432_RATE_MAX, |
| 35 | .rates = SNDRV_PCM_RATE_CONTINUOUS, |
| 36 | .formats = ICS43432_FORMATS, |
| 37 | }, |
| 38 | }; |
| 39 | |
| 40 | static struct snd_soc_codec_driver ics43432_codec_driver = { |
| 41 | }; |
| 42 | |
| 43 | static int ics43432_probe(struct platform_device *pdev) |
| 44 | { |
| 45 | return snd_soc_register_codec(&pdev->dev, &ics43432_codec_driver, |
| 46 | &ics43432_dai, 1); |
| 47 | } |
| 48 | |
| 49 | static int ics43432_remove(struct platform_device *pdev) |
| 50 | { |
| 51 | snd_soc_unregister_codec(&pdev->dev); |
| 52 | return 0; |
| 53 | } |
| 54 | |
| 55 | #ifdef CONFIG_OF |
| 56 | static const struct of_device_id ics43432_ids[] = { |
| 57 | { .compatible = "invensense,ics43432", }, |
| 58 | { } |
| 59 | }; |
| 60 | MODULE_DEVICE_TABLE(of, ics43432_ids); |
| 61 | #endif |
| 62 | |
| 63 | static struct platform_driver ics43432_driver = { |
| 64 | .driver = { |
| 65 | .name = "ics43432", |
| 66 | .of_match_table = of_match_ptr(ics43432_ids), |
| 67 | }, |
| 68 | .probe = ics43432_probe, |
| 69 | .remove = ics43432_remove, |
| 70 | }; |
| 71 | |
| 72 | module_platform_driver(ics43432_driver); |
| 73 | |
| 74 | MODULE_DESCRIPTION("ASoC ICS43432 driver"); |
| 75 | MODULE_AUTHOR("Ricard Wanderlof <ricardw@axis.com>"); |
| 76 | MODULE_LICENSE("GPL v2"); |