summaryrefslogtreecommitdiff
path: root/sound/soc/codecs/dmic.c
diff options
context:
space:
mode:
Diffstat (limited to 'sound/soc/codecs/dmic.c')
-rw-r--r--sound/soc/codecs/dmic.c54
1 files changed, 53 insertions, 1 deletions
diff --git a/sound/soc/codecs/dmic.c b/sound/soc/codecs/dmic.c
index c82b9dc41e9a..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),
@@ -73,9 +119,15 @@ static int dmic_dev_remove(struct platform_device *pdev)
MODULE_ALIAS("platform:dmic-codec");
+static const struct of_device_id dmic_dev_match[] = {
+ {.compatible = "dmic-codec"},
+ {}
+};
+
static struct platform_driver dmic_driver = {
.driver = {
.name = "dmic-codec",
+ .of_match_table = dmic_dev_match,
},
.probe = dmic_dev_probe,
.remove = dmic_dev_remove,