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
ads117x_probe(struct platform_device * pdev)67 static int ads117x_probe(struct platform_device *pdev)
68 {
69 return devm_snd_soc_register_component(&pdev->dev,
70 &soc_component_dev_ads117x, &ads117x_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