mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-17 01:04:19 +08:00
ea2a2ad17c
Use the "cansleep" variant of gpiod_set_value so the driver can be used
with slow gpio controllers as well.
Fixes: 85825d5e88 ("ASoC: dio2125: add dio2125 amp driver")
Reported-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
121 lines
3.2 KiB
C
121 lines
3.2 KiB
C
/*
|
|
* Copyright (c) 2017 BayLibre, SAS.
|
|
* Author: Jerome Brunet <jbrunet@baylibre.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of version 2 of the GNU General Public License as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, see <http://www.gnu.org/licenses/>.
|
|
* The full GNU General Public License is included in this distribution
|
|
* in the file called COPYING.
|
|
*/
|
|
|
|
#include <linux/gpio/consumer.h>
|
|
#include <linux/module.h>
|
|
#include <sound/soc.h>
|
|
|
|
#define DRV_NAME "dio2125"
|
|
|
|
struct dio2125 {
|
|
struct gpio_desc *gpiod_enable;
|
|
};
|
|
|
|
static int drv_event(struct snd_soc_dapm_widget *w,
|
|
struct snd_kcontrol *control, int event)
|
|
{
|
|
struct snd_soc_component *c = snd_soc_dapm_to_component(w->dapm);
|
|
struct dio2125 *priv = snd_soc_component_get_drvdata(c);
|
|
int val;
|
|
|
|
switch (event) {
|
|
case SND_SOC_DAPM_POST_PMU:
|
|
val = 1;
|
|
break;
|
|
case SND_SOC_DAPM_PRE_PMD:
|
|
val = 0;
|
|
break;
|
|
default:
|
|
WARN(1, "Unexpected event");
|
|
return -EINVAL;
|
|
}
|
|
|
|
gpiod_set_value_cansleep(priv->gpiod_enable, val);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct snd_soc_dapm_widget dio2125_dapm_widgets[] = {
|
|
SND_SOC_DAPM_INPUT("INL"),
|
|
SND_SOC_DAPM_INPUT("INR"),
|
|
SND_SOC_DAPM_OUT_DRV_E("DRV", SND_SOC_NOPM, 0, 0, NULL, 0, drv_event,
|
|
(SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD)),
|
|
SND_SOC_DAPM_OUTPUT("OUTL"),
|
|
SND_SOC_DAPM_OUTPUT("OUTR"),
|
|
};
|
|
|
|
static const struct snd_soc_dapm_route dio2125_dapm_routes[] = {
|
|
{ "DRV", NULL, "INL" },
|
|
{ "DRV", NULL, "INR" },
|
|
{ "OUTL", NULL, "DRV" },
|
|
{ "OUTR", NULL, "DRV" },
|
|
};
|
|
|
|
static const struct snd_soc_component_driver dio2125_component_driver = {
|
|
.dapm_widgets = dio2125_dapm_widgets,
|
|
.num_dapm_widgets = ARRAY_SIZE(dio2125_dapm_widgets),
|
|
.dapm_routes = dio2125_dapm_routes,
|
|
.num_dapm_routes = ARRAY_SIZE(dio2125_dapm_routes),
|
|
};
|
|
|
|
static int dio2125_probe(struct platform_device *pdev)
|
|
{
|
|
struct device *dev = &pdev->dev;
|
|
struct dio2125 *priv;
|
|
int err;
|
|
|
|
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
|
|
if (priv == NULL)
|
|
return -ENOMEM;
|
|
platform_set_drvdata(pdev, priv);
|
|
|
|
priv->gpiod_enable = devm_gpiod_get(dev, "enable", GPIOD_OUT_LOW);
|
|
if (IS_ERR(priv->gpiod_enable)) {
|
|
err = PTR_ERR(priv->gpiod_enable);
|
|
if (err != -EPROBE_DEFER)
|
|
dev_err(dev, "Failed to get 'enable' gpio: %d", err);
|
|
return err;
|
|
}
|
|
|
|
return devm_snd_soc_register_component(dev, &dio2125_component_driver,
|
|
NULL, 0);
|
|
}
|
|
|
|
#ifdef CONFIG_OF
|
|
static const struct of_device_id dio2125_ids[] = {
|
|
{ .compatible = "dioo,dio2125", },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(of, dio2125_ids);
|
|
#endif
|
|
|
|
static struct platform_driver dio2125_driver = {
|
|
.driver = {
|
|
.name = DRV_NAME,
|
|
.of_match_table = of_match_ptr(dio2125_ids),
|
|
},
|
|
.probe = dio2125_probe,
|
|
};
|
|
|
|
module_platform_driver(dio2125_driver);
|
|
|
|
MODULE_DESCRIPTION("ASoC DIO2125 output driver");
|
|
MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>");
|
|
MODULE_LICENSE("GPL");
|