1 // SPDX-License-Identifier: GPL-2.0-only 1
2
3 #include <linux/gpio/consumer.h>
4 #include <linux/module.h>
5 #include <linux/regulator/consumer.h>
6 #include <sound/soc.h>
7
8 struct aw8738_priv {
9 struct gpio_desc *gpiod_mode;
10 unsigned int mode;
11 };
12
13 static int aw8738_drv_event(struct snd_soc_dap
14 struct snd_kcontro
15 {
16 struct snd_soc_component *c = snd_soc_
17 struct aw8738_priv *aw = snd_soc_compo
18 int i;
19
20 switch (event) {
21 case SND_SOC_DAPM_POST_PMU:
22 for (i = 0; i < aw->mode; i++)
23 gpiod_set_value_cansle
24 udelay(2);
25 gpiod_set_value_cansle
26 udelay(2);
27 }
28 msleep(40);
29 break;
30 case SND_SOC_DAPM_PRE_PMD:
31 gpiod_set_value_cansleep(aw->g
32 usleep_range(1000, 2000);
33 break;
34 default:
35 WARN(1, "Unexpected event");
36 return -EINVAL;
37 }
38
39 return 0;
40 }
41
42 static const struct snd_soc_dapm_widget aw8738
43 SND_SOC_DAPM_INPUT("IN"),
44 SND_SOC_DAPM_OUT_DRV_E("DRV", SND_SOC_
45 SND_SOC_DAPM_PO
46 SND_SOC_DAPM_OUTPUT("OUT"),
47 };
48
49 static const struct snd_soc_dapm_route aw8738_
50 { "DRV", NULL, "IN" },
51 { "OUT", NULL, "DRV" },
52 };
53
54 static const struct snd_soc_component_driver a
55 .dapm_widgets = aw8738_dapm_widgets,
56 .num_dapm_widgets = ARRAY_SIZE(aw8738_
57 .dapm_routes = aw8738_dapm_routes,
58 .num_dapm_routes = ARRAY_SIZE(aw8738_d
59 };
60
61 static int aw8738_probe(struct platform_device
62 {
63 struct device *dev = &pdev->dev;
64 struct aw8738_priv *aw;
65 int ret;
66
67 aw = devm_kzalloc(dev, sizeof(*aw), GF
68 if (!aw)
69 return -ENOMEM;
70 platform_set_drvdata(pdev, aw);
71
72 aw->gpiod_mode = devm_gpiod_get(dev, "
73 if (IS_ERR(aw->gpiod_mode))
74 return dev_err_probe(dev, PTR_
75 "Failed t
76
77 ret = device_property_read_u32(dev, "a
78 if (ret)
79 return -EINVAL;
80
81 return devm_snd_soc_register_component
82
83
84 }
85
86 #ifdef CONFIG_OF
87 static const struct of_device_id aw8738_of_mat
88 { .compatible = "awinic,aw8738" },
89 { }
90 };
91 MODULE_DEVICE_TABLE(of, aw8738_of_match);
92 #endif
93
94 static struct platform_driver aw8738_driver =
95 .probe = aw8738_probe,
96 .driver = {
97 .name = "aw8738",
98 .of_match_table = of_match_ptr
99 },
100 };
101 module_platform_driver(aw8738_driver);
102
103 MODULE_DESCRIPTION("Awinic AW8738 Amplifier Dr
104 MODULE_LICENSE("GPL v2");
105
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