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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
18struct adau7002_priv {
19 int wakeup_delay;
20};
21
22static 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(w->dapm);
27 struct adau7002_priv *adau7002 =
28 snd_soc_component_get_drvdata(component);
29
30 switch (event) {
31 case SND_SOC_DAPM_POST_PMU:
32 if (adau7002->wakeup_delay)
33 msleep(adau7002->wakeup_delay);
34 break;
35 }
36
37 return 0;
38}
39
40static int adau7002_component_probe(struct snd_soc_component *component)
41{
42 struct adau7002_priv *adau7002;
43
44 adau7002 = devm_kzalloc(component->dev, sizeof(*adau7002),
45 GFP_KERNEL);
46 if (!adau7002)
47 return -ENOMEM;
48
49 device_property_read_u32(component->dev, "wakeup-delay-ms",
50 &adau7002->wakeup_delay);
51
52 snd_soc_component_set_drvdata(component, adau7002);
53
54 return 0;
55}
56
57static 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
65static 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
71static 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
85static 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 .non_legacy_dai_naming = 1,
95};
96
97static int adau7002_probe(struct platform_device *pdev)
98{
99 return devm_snd_soc_register_component(&pdev->dev,
100 &adau7002_component_driver,
101 &adau7002_dai, 1);
102}
103
104static int adau7002_remove(struct platform_device *pdev)
105{
106 return 0;
107}
108
109#ifdef CONFIG_OF
110static const struct of_device_id adau7002_dt_ids[] = {
111 { .compatible = "adi,adau7002", },
112 { }
113};
114MODULE_DEVICE_TABLE(of, adau7002_dt_ids);
115#endif
116
117#ifdef CONFIG_ACPI
118static const struct acpi_device_id adau7002_acpi_match[] = {
119 { "ADAU7002", 0 },
120 {},
121};
122MODULE_DEVICE_TABLE(acpi, adau7002_acpi_match);
123#endif
124
125static struct platform_driver adau7002_driver = {
126 .driver = {
127 .name = "adau7002",
128 .of_match_table = of_match_ptr(adau7002_dt_ids),
129 .acpi_match_table = ACPI_PTR(adau7002_acpi_match),
130 },
131 .probe = adau7002_probe,
132 .remove = adau7002_remove,
133};
134module_platform_driver(adau7002_driver);
135
136MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
137MODULE_DESCRIPTION("ADAU7002 Stereo PDM-to-I2S/TDM Converter driver");
138MODULE_LICENSE("GPL v2");
139
