[PATCH 1/2] ASoC: tegra: add mic detect gpio to tegra_max98090

[Dylan Reid]

Add an optional mic detect gpio property. If specified in device tree
there will be a mic jack created for the given gpio. This will be
used by the Tegra-based Chromebooks.

Signed-off-by: Dylan Reid <dgreid-F7+***@public.gmane.org>
---
.../bindings/sound/nvidia,tegra-audio-max98090.txt | 1 +
sound/soc/tegra/tegra_max98090.c | 40 ++++++++++++++++++++++
2 files changed, 41 insertions(+)

diff --git a/Documentation/devicetree/bindings/sound/nvidia,tegra-audio-max98090.txt b/Documentation/devicetree/bindings/sound/nvidia,tegra-audio-max98090.txt
index 9c7c55c..c949abc 100644
--- a/Documentation/devicetree/bindings/sound/nvidia,tegra-audio-max98090.txt
+++ b/Documentation/devicetree/bindings/sound/nvidia,tegra-audio-max98090.txt
@@ -25,6 +25,7 @@ Required properties:

Optional properties:
- nvidia,hp-det-gpios : The GPIO that detect headphones are plugged in
+- nvidia,mic-det-gpios : The GPIO that detect microphones are plugged in

Example:

diff --git a/sound/soc/tegra/tegra_max98090.c b/sound/soc/tegra/tegra_max98090.c
index b86cd99..01921d7 100644
--- a/sound/soc/tegra/tegra_max98090.c
+++ b/sound/soc/tegra/tegra_max98090.c
@@ -42,6 +42,7 @@
struct tegra_max98090 {
struct tegra_asoc_utils_data util_data;
int gpio_hp_det;
+ int gpio_mic_det;
};

static int tegra_max98090_asoc_hw_params(struct snd_pcm_substream *substream,
@@ -112,6 +113,22 @@ static struct snd_soc_jack_gpio tegra_max98090_hp_jack_gpio = {
.invert = 1,
};

+static struct snd_soc_jack tegra_max98090_mic_jack;
+
+static struct snd_soc_jack_pin tegra_max98090_mic_jack_pins[] = {
+ {
+ .pin = "Mic Jack",
+ .mask = SND_JACK_MICROPHONE,
+ },
+};
+
+static struct snd_soc_jack_gpio tegra_max98090_mic_jack_gpio = {
+ .name = "Mic detection",
+ .report = SND_JACK_MICROPHONE,
+ .debounce_time = 150,
+ .invert = 1,
+};
+
static const struct snd_soc_dapm_widget tegra_max98090_dapm_widgets[] = {
SND_SOC_DAPM_HP("Headphones", NULL),
SND_SOC_DAPM_SPK("Speakers", NULL),
@@ -141,6 +158,19 @@ static int tegra_max98090_asoc_init(struct snd_soc_pcm_runtime *rtd)
&tegra_max98090_hp_jack_gpio);
}

+ if (gpio_is_valid(machine->gpio_mic_det)) {
+ snd_soc_jack_new(codec, "Mic Jack", SND_JACK_MICROPHONE,
+ &tegra_max98090_mic_jack);
+ snd_soc_jack_add_pins(&tegra_max98090_mic_jack,
+ ARRAY_SIZE(tegra_max98090_mic_jack_pins),
+ tegra_max98090_mic_jack_pins);
+
+ tegra_max98090_mic_jack_gpio.gpio = machine->gpio_mic_det;
+ snd_soc_jack_add_gpios(&tegra_max98090_mic_jack,
+ 1,
+ &tegra_max98090_mic_jack_gpio);
+ }
+
return 0;
}

@@ -153,6 +183,11 @@ static int tegra_max98090_card_remove(struct snd_soc_card *card)
&tegra_max98090_hp_jack_gpio);
}

+ if (gpio_is_valid(machine->gpio_mic_det)) {
+ snd_soc_jack_free_gpios(&tegra_max98090_mic_jack, 1,
+ &tegra_max98090_mic_jack_gpio);
+ }
+
return 0;
}

@@ -201,6 +236,11 @@ static int tegra_max98090_probe(struct platform_device *pdev)
if (machine->gpio_hp_det == -EPROBE_DEFER)
return -EPROBE_DEFER;

+ machine->gpio_mic_det =
+ of_get_named_gpio(np, "nvidia,mic-det-gpios", 0);
+ if (machine->gpio_mic_det == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
+
ret = snd_soc_of_parse_card_name(card, "nvidia,model");
if (ret)
goto err;

[Stephen Warren]

Post by Dylan Reid
Add an optional mic detect gpio property. If specified in device tree
there will be a mic jack created for the given gpio. This will be
used by the Tegra-based Chromebooks.

Reviewed-by: Stephen Warren <swarren-DDmLM1+adcrQT0dZR+***@public.gmane.org>

[Mark Brown]

Post by Dylan Reid
Add an optional mic detect gpio property. If specified in device tree
there will be a mic jack created for the given gpio. This will be
used by the Tegra-based Chromebooks.

Applied, thanks.