105 lines
2.6 KiB
C
Executable file
105 lines
2.6 KiB
C
Executable file
// SPDX-License-Identifier: GPL-2.0
|
|
//
|
|
// Analog Devices SSM2305 Amplifier Driver
|
|
//
|
|
// Copyright (C) 2018 Pengutronix, Marco Felsch <kernel@pengutronix.de>
|
|
//
|
|
|
|
#include <linux/gpio/consumer.h>
|
|
#include <linux/module.h>
|
|
#include <sound/soc.h>
|
|
|
|
#define DRV_NAME "ssm2305"
|
|
|
|
struct ssm2305 {
|
|
/* shutdown gpio */
|
|
struct gpio_desc *gpiod_shutdown;
|
|
};
|
|
|
|
static int ssm2305_power_event(struct snd_soc_dapm_widget *w,
|
|
struct snd_kcontrol *kctrl, int event)
|
|
{
|
|
struct snd_soc_component *c = snd_soc_dapm_to_component(w->dapm);
|
|
struct ssm2305 *data = snd_soc_component_get_drvdata(c);
|
|
|
|
gpiod_set_value_cansleep(data->gpiod_shutdown,
|
|
SND_SOC_DAPM_EVENT_ON(event));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct snd_soc_dapm_widget ssm2305_dapm_widgets[] = {
|
|
/* Stereo input/output */
|
|
SND_SOC_DAPM_INPUT("L_IN"),
|
|
SND_SOC_DAPM_INPUT("R_IN"),
|
|
SND_SOC_DAPM_OUTPUT("L_OUT"),
|
|
SND_SOC_DAPM_OUTPUT("R_OUT"),
|
|
|
|
SND_SOC_DAPM_SUPPLY("Power", SND_SOC_NOPM, 0, 0, ssm2305_power_event,
|
|
SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
|
|
};
|
|
|
|
static const struct snd_soc_dapm_route ssm2305_dapm_routes[] = {
|
|
{ "L_OUT", NULL, "L_IN" },
|
|
{ "R_OUT", NULL, "R_IN" },
|
|
{ "L_IN", NULL, "Power" },
|
|
{ "R_IN", NULL, "Power" },
|
|
};
|
|
|
|
static const struct snd_soc_component_driver ssm2305_component_driver = {
|
|
.dapm_widgets = ssm2305_dapm_widgets,
|
|
.num_dapm_widgets = ARRAY_SIZE(ssm2305_dapm_widgets),
|
|
.dapm_routes = ssm2305_dapm_routes,
|
|
.num_dapm_routes = ARRAY_SIZE(ssm2305_dapm_routes),
|
|
};
|
|
|
|
static int ssm2305_probe(struct platform_device *pdev)
|
|
{
|
|
struct device *dev = &pdev->dev;
|
|
struct ssm2305 *priv;
|
|
int err;
|
|
|
|
/* Allocate the private data */
|
|
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
|
|
if (!priv)
|
|
return -ENOMEM;
|
|
|
|
platform_set_drvdata(pdev, priv);
|
|
|
|
/* Get shutdown gpio */
|
|
priv->gpiod_shutdown = devm_gpiod_get(dev, "shutdown",
|
|
GPIOD_OUT_LOW);
|
|
if (IS_ERR(priv->gpiod_shutdown)) {
|
|
err = PTR_ERR(priv->gpiod_shutdown);
|
|
if (err != -EPROBE_DEFER)
|
|
dev_err(dev, "Failed to get 'shutdown' gpio: %d\n",
|
|
err);
|
|
return err;
|
|
}
|
|
|
|
return devm_snd_soc_register_component(dev, &ssm2305_component_driver,
|
|
NULL, 0);
|
|
}
|
|
|
|
#ifdef CONFIG_OF
|
|
static const struct of_device_id ssm2305_of_match[] = {
|
|
{ .compatible = "adi,ssm2305", },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(of, ssm2305_of_match);
|
|
#endif
|
|
|
|
static struct platform_driver ssm2305_driver = {
|
|
.driver = {
|
|
.name = DRV_NAME,
|
|
.of_match_table = of_match_ptr(ssm2305_of_match),
|
|
},
|
|
.probe = ssm2305_probe,
|
|
};
|
|
|
|
module_platform_driver(ssm2305_driver);
|
|
|
|
MODULE_DESCRIPTION("ASoC SSM2305 amplifier driver");
|
|
MODULE_AUTHOR("Marco Felsch <m.felsch@pengutronix.de>");
|
|
MODULE_LICENSE("GPL v2");
|