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ASoC: codec: use enable pin to control dmic start and stop 

on some board use enable pin to control dmic start and stop,
so add this feature in dmic driver.

Signed-off-by: Lin Huang <hl@rock-chips.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
huang lin 2017-08-17 10:24:44 +08:00 committed by Mark Brown
parent 8c9741b1b9
commit 23c7159a79
2 changed files with 48 additions and 2 deletions
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2
sound/soc/codecs/Kconfig
View File

@ -71,7 +71,7 @@ config SND_SOC_ALL_CODECS
select SND_SOC_DA732X if I2C
select SND_SOC_DA9055 if I2C
select SND_SOC_DIO2125
select SND_SOC_DMIC
select SND_SOC_DMIC if GPIOLIB
select SND_SOC_ES8316 if I2C
select SND_SOC_ES8328_SPI if SPI_MASTER
select SND_SOC_ES8328_I2C if I2C

48
sound/soc/codecs/dmic.c
View File

@ -19,6 +19,8 @@
*
*/
#include <linux/gpio.h>
#include <linux/gpio/consumer.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/module.h>
@ -27,6 +29,34 @@
#include <sound/soc.h>
#include <sound/soc-dapm.h>
static int dmic_daiops_trigger(struct snd_pcm_substream *substream,
int cmd, struct snd_soc_dai *dai)
{
struct gpio_desc *dmic_en = snd_soc_dai_get_drvdata(dai);
if (!dmic_en)
return 0;
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
gpiod_set_value(dmic_en, 1);
break;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
gpiod_set_value(dmic_en, 0);
break;
}
return 0;
}
static const struct snd_soc_dai_ops dmic_dai_ops = {
.trigger = dmic_daiops_trigger,
};
static struct snd_soc_dai_driver dmic_dai = {
.name = "dmic-hifi",
.capture = {
@ -38,8 +68,23 @@ static struct snd_soc_dai_driver dmic_dai = {
| SNDRV_PCM_FMTBIT_S24_LE
| SNDRV_PCM_FMTBIT_S16_LE,
},
.ops = &dmic_dai_ops,
};
static int dmic_codec_probe(struct snd_soc_codec *codec)
{
struct gpio_desc *dmic_en;
dmic_en = devm_gpiod_get_optional(codec->dev,
"dmicen", GPIOD_OUT_LOW);
if (IS_ERR(dmic_en))
return PTR_ERR(dmic_en);
snd_soc_codec_set_drvdata(codec, dmic_en);
return 0;
}
static const struct snd_soc_dapm_widget dmic_dapm_widgets[] = {
SND_SOC_DAPM_AIF_OUT("DMIC AIF", "Capture", 0,
SND_SOC_NOPM, 0, 0),
@ -50,7 +95,8 @@ static const struct snd_soc_dapm_route intercon[] = {
{"DMIC AIF", NULL, "DMic"},
};
static struct snd_soc_codec_driver soc_dmic = {
static const struct snd_soc_codec_driver soc_dmic = {
.probe = dmic_codec_probe,
.component_driver = {
.dapm_widgets = dmic_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(dmic_dapm_widgets),