Commit 23c7159a authored by huang lin's avatar huang lin Committed by Mark Brown
Browse files

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: default avatarLin Huang <hl@rock-chips.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 8c9741b1

sound/soc/codecs/Kconfig

+1 −1
Original line number Diff line number Diff line
@@ -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

sound/soc/codecs/dmic.c

+47 −1
Original line number Diff line number Diff line
@@ -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),