1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0
2*4882a593Smuzhiyun //
3*4882a593Smuzhiyun // Analog Devices SSM2305 Amplifier Driver
4*4882a593Smuzhiyun //
5*4882a593Smuzhiyun // Copyright (C) 2018 Pengutronix, Marco Felsch <kernel@pengutronix.de>
6*4882a593Smuzhiyun //
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun #include <linux/gpio/consumer.h>
9*4882a593Smuzhiyun #include <linux/module.h>
10*4882a593Smuzhiyun #include <sound/soc.h>
11*4882a593Smuzhiyun
12*4882a593Smuzhiyun #define DRV_NAME "ssm2305"
13*4882a593Smuzhiyun
14*4882a593Smuzhiyun struct ssm2305 {
15*4882a593Smuzhiyun /* shutdown gpio */
16*4882a593Smuzhiyun struct gpio_desc *gpiod_shutdown;
17*4882a593Smuzhiyun };
18*4882a593Smuzhiyun
ssm2305_power_event(struct snd_soc_dapm_widget * w,struct snd_kcontrol * kctrl,int event)19*4882a593Smuzhiyun static int ssm2305_power_event(struct snd_soc_dapm_widget *w,
20*4882a593Smuzhiyun struct snd_kcontrol *kctrl, int event)
21*4882a593Smuzhiyun {
22*4882a593Smuzhiyun struct snd_soc_component *c = snd_soc_dapm_to_component(w->dapm);
23*4882a593Smuzhiyun struct ssm2305 *data = snd_soc_component_get_drvdata(c);
24*4882a593Smuzhiyun
25*4882a593Smuzhiyun gpiod_set_value_cansleep(data->gpiod_shutdown,
26*4882a593Smuzhiyun SND_SOC_DAPM_EVENT_ON(event));
27*4882a593Smuzhiyun
28*4882a593Smuzhiyun return 0;
29*4882a593Smuzhiyun }
30*4882a593Smuzhiyun
31*4882a593Smuzhiyun static const struct snd_soc_dapm_widget ssm2305_dapm_widgets[] = {
32*4882a593Smuzhiyun /* Stereo input/output */
33*4882a593Smuzhiyun SND_SOC_DAPM_INPUT("L_IN"),
34*4882a593Smuzhiyun SND_SOC_DAPM_INPUT("R_IN"),
35*4882a593Smuzhiyun SND_SOC_DAPM_OUTPUT("L_OUT"),
36*4882a593Smuzhiyun SND_SOC_DAPM_OUTPUT("R_OUT"),
37*4882a593Smuzhiyun
38*4882a593Smuzhiyun SND_SOC_DAPM_SUPPLY("Power", SND_SOC_NOPM, 0, 0, ssm2305_power_event,
39*4882a593Smuzhiyun SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
40*4882a593Smuzhiyun };
41*4882a593Smuzhiyun
42*4882a593Smuzhiyun static const struct snd_soc_dapm_route ssm2305_dapm_routes[] = {
43*4882a593Smuzhiyun { "L_OUT", NULL, "L_IN" },
44*4882a593Smuzhiyun { "R_OUT", NULL, "R_IN" },
45*4882a593Smuzhiyun { "L_IN", NULL, "Power" },
46*4882a593Smuzhiyun { "R_IN", NULL, "Power" },
47*4882a593Smuzhiyun };
48*4882a593Smuzhiyun
49*4882a593Smuzhiyun static const struct snd_soc_component_driver ssm2305_component_driver = {
50*4882a593Smuzhiyun .dapm_widgets = ssm2305_dapm_widgets,
51*4882a593Smuzhiyun .num_dapm_widgets = ARRAY_SIZE(ssm2305_dapm_widgets),
52*4882a593Smuzhiyun .dapm_routes = ssm2305_dapm_routes,
53*4882a593Smuzhiyun .num_dapm_routes = ARRAY_SIZE(ssm2305_dapm_routes),
54*4882a593Smuzhiyun };
55*4882a593Smuzhiyun
ssm2305_probe(struct platform_device * pdev)56*4882a593Smuzhiyun static int ssm2305_probe(struct platform_device *pdev)
57*4882a593Smuzhiyun {
58*4882a593Smuzhiyun struct device *dev = &pdev->dev;
59*4882a593Smuzhiyun struct ssm2305 *priv;
60*4882a593Smuzhiyun int err;
61*4882a593Smuzhiyun
62*4882a593Smuzhiyun /* Allocate the private data */
63*4882a593Smuzhiyun priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
64*4882a593Smuzhiyun if (!priv)
65*4882a593Smuzhiyun return -ENOMEM;
66*4882a593Smuzhiyun
67*4882a593Smuzhiyun platform_set_drvdata(pdev, priv);
68*4882a593Smuzhiyun
69*4882a593Smuzhiyun /* Get shutdown gpio */
70*4882a593Smuzhiyun priv->gpiod_shutdown = devm_gpiod_get(dev, "shutdown",
71*4882a593Smuzhiyun GPIOD_OUT_LOW);
72*4882a593Smuzhiyun if (IS_ERR(priv->gpiod_shutdown)) {
73*4882a593Smuzhiyun err = PTR_ERR(priv->gpiod_shutdown);
74*4882a593Smuzhiyun if (err != -EPROBE_DEFER)
75*4882a593Smuzhiyun dev_err(dev, "Failed to get 'shutdown' gpio: %d\n",
76*4882a593Smuzhiyun err);
77*4882a593Smuzhiyun return err;
78*4882a593Smuzhiyun }
79*4882a593Smuzhiyun
80*4882a593Smuzhiyun return devm_snd_soc_register_component(dev, &ssm2305_component_driver,
81*4882a593Smuzhiyun NULL, 0);
82*4882a593Smuzhiyun }
83*4882a593Smuzhiyun
84*4882a593Smuzhiyun #ifdef CONFIG_OF
85*4882a593Smuzhiyun static const struct of_device_id ssm2305_of_match[] = {
86*4882a593Smuzhiyun { .compatible = "adi,ssm2305", },
87*4882a593Smuzhiyun { }
88*4882a593Smuzhiyun };
89*4882a593Smuzhiyun MODULE_DEVICE_TABLE(of, ssm2305_of_match);
90*4882a593Smuzhiyun #endif
91*4882a593Smuzhiyun
92*4882a593Smuzhiyun static struct platform_driver ssm2305_driver = {
93*4882a593Smuzhiyun .driver = {
94*4882a593Smuzhiyun .name = DRV_NAME,
95*4882a593Smuzhiyun .of_match_table = of_match_ptr(ssm2305_of_match),
96*4882a593Smuzhiyun },
97*4882a593Smuzhiyun .probe = ssm2305_probe,
98*4882a593Smuzhiyun };
99*4882a593Smuzhiyun
100*4882a593Smuzhiyun module_platform_driver(ssm2305_driver);
101*4882a593Smuzhiyun
102*4882a593Smuzhiyun MODULE_DESCRIPTION("ASoC SSM2305 amplifier driver");
103*4882a593Smuzhiyun MODULE_AUTHOR("Marco Felsch <m.felsch@pengutronix.de>");
104*4882a593Smuzhiyun MODULE_LICENSE("GPL v2");
105