1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * ADAU7002 Stereo PDM-to-I2S/TDM converter driver |
4 | * |
5 | * Copyright 2014-2016 Analog Devices |
6 | * Author: Lars-Peter Clausen <lars@metafoo.de> |
7 | */ |
8 | |
9 | #include <linux/acpi.h> |
10 | #include <linux/delay.h> |
11 | #include <linux/init.h> |
12 | #include <linux/module.h> |
13 | #include <linux/of.h> |
14 | #include <linux/platform_device.h> |
15 | |
16 | #include <sound/soc.h> |
17 | |
18 | struct adau7002_priv { |
19 | int wakeup_delay; |
20 | }; |
21 | |
22 | static int adau7002_aif_event(struct snd_soc_dapm_widget *w, |
23 | struct snd_kcontrol *kcontrol, int event) |
24 | { |
25 | struct snd_soc_component *component = |
26 | snd_soc_dapm_to_component(dapm: w->dapm); |
27 | struct adau7002_priv *adau7002 = |
28 | snd_soc_component_get_drvdata(c: component); |
29 | |
30 | switch (event) { |
31 | case SND_SOC_DAPM_POST_PMU: |
32 | if (adau7002->wakeup_delay) |
33 | msleep(msecs: adau7002->wakeup_delay); |
34 | break; |
35 | } |
36 | |
37 | return 0; |
38 | } |
39 | |
40 | static int adau7002_component_probe(struct snd_soc_component *component) |
41 | { |
42 | struct adau7002_priv *adau7002; |
43 | |
44 | adau7002 = devm_kzalloc(dev: component->dev, size: sizeof(*adau7002), |
45 | GFP_KERNEL); |
46 | if (!adau7002) |
47 | return -ENOMEM; |
48 | |
49 | device_property_read_u32(dev: component->dev, propname: "wakeup-delay-ms" , |
50 | val: &adau7002->wakeup_delay); |
51 | |
52 | snd_soc_component_set_drvdata(c: component, data: adau7002); |
53 | |
54 | return 0; |
55 | } |
56 | |
57 | static const struct snd_soc_dapm_widget adau7002_widgets[] = { |
58 | SND_SOC_DAPM_AIF_OUT_E("ADAU AIF" , "Capture" , 0, |
59 | SND_SOC_NOPM, 0, 0, adau7002_aif_event, |
60 | SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_POST_PMD), |
61 | SND_SOC_DAPM_INPUT("PDM_DAT" ), |
62 | SND_SOC_DAPM_REGULATOR_SUPPLY("IOVDD" , 0, 0), |
63 | }; |
64 | |
65 | static const struct snd_soc_dapm_route adau7002_routes[] = { |
66 | { "ADAU AIF" , NULL, "PDM_DAT" }, |
67 | { "Capture" , NULL, "PDM_DAT" }, |
68 | { "Capture" , NULL, "IOVDD" }, |
69 | }; |
70 | |
71 | static struct snd_soc_dai_driver adau7002_dai = { |
72 | .name = "adau7002-hifi" , |
73 | .capture = { |
74 | .stream_name = "Capture" , |
75 | .channels_min = 2, |
76 | .channels_max = 2, |
77 | .rates = SNDRV_PCM_RATE_8000_96000, |
78 | .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S18_3LE | |
79 | SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE | |
80 | SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S32_LE, |
81 | .sig_bits = 20, |
82 | }, |
83 | }; |
84 | |
85 | static const struct snd_soc_component_driver adau7002_component_driver = { |
86 | .probe = adau7002_component_probe, |
87 | .dapm_widgets = adau7002_widgets, |
88 | .num_dapm_widgets = ARRAY_SIZE(adau7002_widgets), |
89 | .dapm_routes = adau7002_routes, |
90 | .num_dapm_routes = ARRAY_SIZE(adau7002_routes), |
91 | .idle_bias_on = 1, |
92 | .use_pmdown_time = 1, |
93 | .endianness = 1, |
94 | }; |
95 | |
96 | static int adau7002_probe(struct platform_device *pdev) |
97 | { |
98 | return devm_snd_soc_register_component(dev: &pdev->dev, |
99 | component_driver: &adau7002_component_driver, |
100 | dai_drv: &adau7002_dai, num_dai: 1); |
101 | } |
102 | |
103 | #ifdef CONFIG_OF |
104 | static const struct of_device_id adau7002_dt_ids[] = { |
105 | { .compatible = "adi,adau7002" , }, |
106 | { } |
107 | }; |
108 | MODULE_DEVICE_TABLE(of, adau7002_dt_ids); |
109 | #endif |
110 | |
111 | #ifdef CONFIG_ACPI |
112 | static const struct acpi_device_id adau7002_acpi_match[] = { |
113 | { "ADAU7002" , 0 }, |
114 | {}, |
115 | }; |
116 | MODULE_DEVICE_TABLE(acpi, adau7002_acpi_match); |
117 | #endif |
118 | |
119 | static struct platform_driver adau7002_driver = { |
120 | .driver = { |
121 | .name = "adau7002" , |
122 | .of_match_table = of_match_ptr(adau7002_dt_ids), |
123 | .acpi_match_table = ACPI_PTR(adau7002_acpi_match), |
124 | }, |
125 | .probe = adau7002_probe, |
126 | }; |
127 | module_platform_driver(adau7002_driver); |
128 | |
129 | MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>" ); |
130 | MODULE_DESCRIPTION("ADAU7002 Stereo PDM-to-I2S/TDM Converter driver" ); |
131 | MODULE_LICENSE("GPL v2" ); |
132 | |