ASoC: tegra: add mic detect gpio to tegra_max98090

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@chromium.org>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

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 (file)
--- 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 (file)
--- 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;