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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * I2S MEMS microphone driver for InvenSense ICS-43432 and similar4 * MEMS-based microphones.5 *6 * - Non configurable.7 * - I2S interface, 64 BCLs per frame, 32 bits per channel, 24 bit data8 *9 * Copyright (c) 2015 Axis Communications AB10 */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 27static 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 40static const struct snd_soc_component_driver ics43432_component_driver = {41 .idle_bias_on = 1,42 .use_pmdown_time = 1,43 .endianness = 1,44};45 46static 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_OF54static const struct of_device_id ics43432_ids[] = {55 { .compatible = "invensense,ics43432", },56 { .compatible = "cui,cmm-4030d-261", },57 { }58};59MODULE_DEVICE_TABLE(of, ics43432_ids);60#endif61 62static struct platform_driver ics43432_driver = {63 .driver = {64 .name = "ics43432",65 .of_match_table = of_match_ptr(ics43432_ids),66 },67 .probe = ics43432_probe,68};69 70module_platform_driver(ics43432_driver);71 72MODULE_DESCRIPTION("ASoC ICS43432 driver");73MODULE_AUTHOR("Ricard Wanderlof <ricardw@axis.com>");74MODULE_LICENSE("GPL v2");75