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>

1 files changed, 40 insertions, 0 deletions

diff --git a/sound/soc/tegra/tegra_max98090.c b/sound/soc/tegra/tegra_max98090.c
index b86cd9936ef1..01921d7e73fa 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;