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authorhuang lin <hl@rock-chips.com>2017-08-17 05:24:44 +0300
committerMark Brown <broonie@kernel.org>2017-08-17 20:03:15 +0300
commit23c7159a799f3364720b3d250f57bc8e26b17287 (patch)
tree012afa827f51819f42d13d3ff686dda38847c819 /sound/soc/codecs/dmic.c
parent8c9741b1b91d9fb4f094bfa66f0ae02c9a495f48 (diff)
downloadlinux-23c7159a799f3364720b3d250f57bc8e26b17287.tar.xz
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>
Diffstat (limited to 'sound/soc/codecs/dmic.c')
-rw-r--r--sound/soc/codecs/dmic.c48
1 files changed, 47 insertions, 1 deletions
diff --git a/sound/soc/codecs/dmic.c b/sound/soc/codecs/dmic.c
index d50f142e2972..b88a1ee66f80 100644
--- a/sound/soc/codecs/dmic.c
+++ b/sound/soc/codecs/dmic.c
@@ -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),