diff options
| -rw-r--r-- | Documentation/devicetree/bindings/sound/dmic-codec.yaml | 3 | ||||
| -rw-r--r-- | sound/soc/codecs/dmic.c | 19 |
2 files changed, 21 insertions, 1 deletions
diff --git a/Documentation/devicetree/bindings/sound/dmic-codec.yaml b/Documentation/devicetree/bindings/sound/dmic-codec.yaml index 59ef0cf6b6e5..cc3c84dd4c26 100644 --- a/Documentation/devicetree/bindings/sound/dmic-codec.yaml +++ b/Documentation/devicetree/bindings/sound/dmic-codec.yaml @@ -19,6 +19,9 @@ properties: '#sound-dai-cells': const: 0 + vref-supply: + description: Phandle to the digital microphone reference supply + dmicen-gpios: description: GPIO specifier for DMIC to control start and stop maxItems: 1 diff --git a/sound/soc/codecs/dmic.c b/sound/soc/codecs/dmic.c index 0388f115470c..5d3c3f17c6d8 100644 --- a/sound/soc/codecs/dmic.c +++ b/sound/soc/codecs/dmic.c @@ -9,6 +9,7 @@ #include <linux/gpio.h> #include <linux/gpio/consumer.h> #include <linux/platform_device.h> +#include <linux/regulator/consumer.h> #include <linux/slab.h> #include <linux/module.h> #include <sound/core.h> @@ -25,6 +26,7 @@ module_param(wakeup_delay, uint, 0644); struct dmic { struct gpio_desc *gpio_en; + struct regulator *vref; int wakeup_delay; /* Delay after DMIC mode switch */ int modeswitch_delay; @@ -55,22 +57,33 @@ static int dmic_aif_event(struct snd_soc_dapm_widget *w, struct snd_kcontrol *kcontrol, int event) { struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm); struct dmic *dmic = snd_soc_component_get_drvdata(component); + int ret = 0; switch (event) { case SND_SOC_DAPM_POST_PMU: if (dmic->gpio_en) gpiod_set_value_cansleep(dmic->gpio_en, 1); + if (dmic->vref) { + ret = regulator_enable(dmic->vref); + if (ret) + return ret; + } + if (dmic->wakeup_delay) msleep(dmic->wakeup_delay); break; case SND_SOC_DAPM_POST_PMD: if (dmic->gpio_en) gpiod_set_value_cansleep(dmic->gpio_en, 0); + + if (dmic->vref) + ret = regulator_disable(dmic->vref); + break; } - return 0; + return ret; } static struct snd_soc_dai_driver dmic_dai = { @@ -100,6 +113,10 @@ static int dmic_component_probe(struct snd_soc_component *component) if (!dmic) return -ENOMEM; + dmic->vref = devm_regulator_get_optional(component->dev, "vref"); + if (IS_ERR(dmic->vref) && PTR_ERR(dmic->vref) != -ENODEV) + return dev_err_probe(component->dev, PTR_ERR(dmic->vref), "Failed to get vref\n"); + dmic->gpio_en = devm_gpiod_get_optional(component->dev, "dmicen", GPIOD_OUT_LOW); if (IS_ERR(dmic->gpio_en)) |