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 --- .../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;