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"); 74