1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * I2S MEMS microphone driver for InvenSense ICS-43432 and similar |
4 | * MEMS-based microphones. |
5 | * |
6 | * - Non configurable. |
7 | * - I2S interface, 64 BCLs per frame, 32 bits per channel, 24 bit data |
8 | * |
9 | * Copyright (c) 2015 Axis Communications AB |
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 const struct snd_soc_component_driver ics43432_component_driver = { |
41 | .idle_bias_on = 1, |
42 | .use_pmdown_time = 1, |
43 | .endianness = 1, |
44 | }; |
45 | |
46 | static int ics43432_probe(struct platform_device *pdev) |
47 | { |
48 | return devm_snd_soc_register_component(dev: &pdev->dev, |
49 | component_driver: &ics43432_component_driver, |
50 | dai_drv: &ics43432_dai, num_dai: 1); |
51 | } |
52 | |
53 | #ifdef CONFIG_OF |
54 | static const struct of_device_id ics43432_ids[] = { |
55 | { .compatible = "invensense,ics43432" , }, |
56 | { .compatible = "cui,cmm-4030d-261" , }, |
57 | { } |
58 | }; |
59 | MODULE_DEVICE_TABLE(of, ics43432_ids); |
60 | #endif |
61 | |
62 | static 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 | |
70 | module_platform_driver(ics43432_driver); |
71 | |
72 | MODULE_DESCRIPTION("ASoC ICS43432 driver" ); |
73 | MODULE_AUTHOR("Ricard Wanderlof <ricardw@axis.com>" ); |
74 | MODULE_LICENSE("GPL v2" ); |
75 | |