1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * ads117x.c -- Driver for ads1174/8 ADC chips |
4 | * |
5 | * Copyright 2009 ShotSpotter Inc. |
6 | * Author: Graeme Gregory <gg@slimlogic.co.uk> |
7 | */ |
8 | |
9 | #include <linux/kernel.h> |
10 | #include <linux/slab.h> |
11 | #include <linux/init.h> |
12 | #include <linux/device.h> |
13 | #include <linux/module.h> |
14 | #include <sound/core.h> |
15 | #include <sound/pcm.h> |
16 | #include <sound/initval.h> |
17 | #include <sound/soc.h> |
18 | |
19 | #include <linux/of.h> |
20 | |
21 | #define ADS117X_RATES (SNDRV_PCM_RATE_8000_48000) |
22 | #define ADS117X_FORMATS (SNDRV_PCM_FMTBIT_S16_LE) |
23 | |
24 | static const struct snd_soc_dapm_widget ads117x_dapm_widgets[] = { |
25 | SND_SOC_DAPM_INPUT("Input1" ), |
26 | SND_SOC_DAPM_INPUT("Input2" ), |
27 | SND_SOC_DAPM_INPUT("Input3" ), |
28 | SND_SOC_DAPM_INPUT("Input4" ), |
29 | SND_SOC_DAPM_INPUT("Input5" ), |
30 | SND_SOC_DAPM_INPUT("Input6" ), |
31 | SND_SOC_DAPM_INPUT("Input7" ), |
32 | SND_SOC_DAPM_INPUT("Input8" ), |
33 | }; |
34 | |
35 | static const struct snd_soc_dapm_route ads117x_dapm_routes[] = { |
36 | { "Capture" , NULL, "Input1" }, |
37 | { "Capture" , NULL, "Input2" }, |
38 | { "Capture" , NULL, "Input3" }, |
39 | { "Capture" , NULL, "Input4" }, |
40 | { "Capture" , NULL, "Input5" }, |
41 | { "Capture" , NULL, "Input6" }, |
42 | { "Capture" , NULL, "Input7" }, |
43 | { "Capture" , NULL, "Input8" }, |
44 | }; |
45 | |
46 | static struct snd_soc_dai_driver ads117x_dai = { |
47 | /* ADC */ |
48 | .name = "ads117x-hifi" , |
49 | .capture = { |
50 | .stream_name = "Capture" , |
51 | .channels_min = 1, |
52 | .channels_max = 32, |
53 | .rates = ADS117X_RATES, |
54 | .formats = ADS117X_FORMATS,}, |
55 | }; |
56 | |
57 | static const struct snd_soc_component_driver soc_component_dev_ads117x = { |
58 | .dapm_widgets = ads117x_dapm_widgets, |
59 | .num_dapm_widgets = ARRAY_SIZE(ads117x_dapm_widgets), |
60 | .dapm_routes = ads117x_dapm_routes, |
61 | .num_dapm_routes = ARRAY_SIZE(ads117x_dapm_routes), |
62 | .idle_bias_on = 1, |
63 | .use_pmdown_time = 1, |
64 | .endianness = 1, |
65 | }; |
66 | |
67 | static int ads117x_probe(struct platform_device *pdev) |
68 | { |
69 | return devm_snd_soc_register_component(dev: &pdev->dev, |
70 | component_driver: &soc_component_dev_ads117x, dai_drv: &ads117x_dai, num_dai: 1); |
71 | } |
72 | |
73 | #if defined(CONFIG_OF) |
74 | static const struct of_device_id ads117x_dt_ids[] = { |
75 | { .compatible = "ti,ads1174" }, |
76 | { .compatible = "ti,ads1178" }, |
77 | { }, |
78 | }; |
79 | MODULE_DEVICE_TABLE(of, ads117x_dt_ids); |
80 | #endif |
81 | |
82 | static struct platform_driver ads117x_codec_driver = { |
83 | .driver = { |
84 | .name = "ads117x-codec" , |
85 | .of_match_table = of_match_ptr(ads117x_dt_ids), |
86 | }, |
87 | |
88 | .probe = ads117x_probe, |
89 | }; |
90 | |
91 | module_platform_driver(ads117x_codec_driver); |
92 | |
93 | MODULE_DESCRIPTION("ASoC ads117x driver" ); |
94 | MODULE_AUTHOR("Graeme Gregory" ); |
95 | MODULE_LICENSE("GPL" ); |
96 | |