ASoC: simple-card: Add mic and hp detect gpios.

Allow Headphone and Microphone jack detect gpios to be specified in
device tree.  This will allow a few systems including rk3288_max98090
to use simple-card instead of having their own board file.

Signed-off-by: Dylan Reid <dgreid@chromium.org>
Signed-off-by: Mark Brown <broonie@kernel.org>

2 files changed, 77 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/sound/simple-card.txt b/Documentation/devicetree/bindings/sound/simple-card.txt
index c2e9841dfce4..72d94b7aa5f5 100644
--- a/Documentation/devicetree/bindings/sound/simple-card.txt
+++ b/Documentation/devicetree/bindings/sound/simple-card.txt
@@ -17,6 +17,10 @@ Optional properties:
                                           source.
 - simple-audio-card,mclk-fs             : Multiplication factor between stream rate and codec
                                           mclk.
+- simple-audio-card,hp_det_gpio         : Reference to GPIO that signals when
+                                          headphones are attached.
+- simple-audio-card,mic_det_gpio        : Reference to GPIO that signals when
+                                          a microphone is attached.
 
 Optional subnodes:
 
diff --git a/sound/soc/generic/simple-card.c b/sound/soc/generic/simple-card.c
index 709ce67849c8..fcb431fe20b4 100644
--- a/sound/soc/generic/simple-card.c
+++ b/sound/soc/generic/simple-card.c
@@ -10,10 +10,13 @@
  */
 #include <linux/clk.h>
 #include <linux/device.h>
+#include <linux/gpio.h>
 #include <linux/module.h>
 #include <linux/of.h>
+#include <linux/of_gpio.h>
 #include <linux/platform_device.h>
 #include <linux/string.h>
+#include <sound/jack.h>
 #include <sound/simple_card.h>
 #include <sound/soc-dai.h>
 #include <sound/soc.h>
@@ -25,6 +28,8 @@ struct simple_card_data {
                 struct asoc_simple_dai codec_dai;
         } *dai_props;
         unsigned int mclk_fs;
+        int gpio_hp_det;
+        int gpio_mic_det;
         struct snd_soc_dai_link dai_link[];     /* dynamically allocated */
 };
 
@@ -54,6 +59,32 @@ static struct snd_soc_ops asoc_simple_card_ops = {
         .hw_params = asoc_simple_card_hw_params,
 };
 
+static struct snd_soc_jack simple_card_hp_jack;
+static struct snd_soc_jack_pin simple_card_hp_jack_pins[] = {
+        {
+                .pin = "Headphones",
+                .mask = SND_JACK_HEADPHONE,
+        },
+};
+static struct snd_soc_jack_gpio simple_card_hp_jack_gpio = {
+        .name = "Headphone detection",
+        .report = SND_JACK_HEADPHONE,
+        .debounce_time = 150,
+};
+
+static struct snd_soc_jack simple_card_mic_jack;
+static struct snd_soc_jack_pin simple_card_mic_jack_pins[] = {
+        {
+                .pin = "Mic Jack",
+                .mask = SND_JACK_MICROPHONE,
+        },
+};
+static struct snd_soc_jack_gpio simple_card_mic_jack_gpio = {
+        .name = "Mic detection",
+        .report = SND_JACK_MICROPHONE,
+        .debounce_time = 150,
+};
+
 static int __asoc_simple_card_dai_init(struct snd_soc_dai *dai,
                                        struct asoc_simple_dai *set)
 {
@@ -109,6 +140,28 @@ static int asoc_simple_card_dai_init(struct snd_soc_pcm_runtime *rtd)
         if (ret < 0)
                 return ret;
 
+        if (gpio_is_valid(priv->gpio_hp_det)) {
+                snd_soc_jack_new(codec->codec, "Headphones", SND_JACK_HEADPHONE,
+                                 &simple_card_hp_jack);
+                snd_soc_jack_add_pins(&simple_card_hp_jack,
+                                      ARRAY_SIZE(simple_card_hp_jack_pins),
+                                      simple_card_hp_jack_pins);
+
+                simple_card_hp_jack_gpio.gpio = priv->gpio_hp_det;
+                snd_soc_jack_add_gpios(&simple_card_hp_jack, 1,
+                                       &simple_card_hp_jack_gpio);
+        }
+
+        if (gpio_is_valid(priv->gpio_mic_det)) {
+                snd_soc_jack_new(codec->codec, "Mic Jack", SND_JACK_MICROPHONE,
+                                 &simple_card_mic_jack);
+                snd_soc_jack_add_pins(&simple_card_mic_jack,
+                                      ARRAY_SIZE(simple_card_mic_jack_pins),
+                                      simple_card_mic_jack_pins);
+                simple_card_mic_jack_gpio.gpio = priv->gpio_mic_det;
+                snd_soc_jack_add_gpios(&simple_card_mic_jack, 1,
+                                       &simple_card_mic_jack_gpio);
+        }
         return 0;
 }
 
@@ -383,6 +436,16 @@ static int asoc_simple_card_parse_of(struct device_node *node,
                         return ret;
         }
 
+        priv->gpio_hp_det = of_get_named_gpio(node,
+                                "simple-audio-card,hp-det-gpio", 0);
+        if (priv->gpio_hp_det == -EPROBE_DEFER)
+                return -EPROBE_DEFER;
+
+        priv->gpio_mic_det = of_get_named_gpio(node,
+                                "simple-audio-card,mic-det-gpio", 0);
+        if (priv->gpio_mic_det == -EPROBE_DEFER)
+                return -EPROBE_DEFER;
+
         if (!priv->snd_card.name)
                 priv->snd_card.name = priv->snd_card.dai_link->name;
 
@@ -502,6 +565,16 @@ err:
 
 static int asoc_simple_card_remove(struct platform_device *pdev)
 {
+        struct snd_soc_card *card = platform_get_drvdata(pdev);
+        struct simple_card_data *priv = snd_soc_card_get_drvdata(card);
+
+        if (gpio_is_valid(priv->gpio_hp_det))
+                snd_soc_jack_free_gpios(&simple_card_hp_jack, 1,
+                                        &simple_card_hp_jack_gpio);
+        if (gpio_is_valid(priv->gpio_mic_det))
+                snd_soc_jack_free_gpios(&simple_card_mic_jack, 1,
+                                        &simple_card_mic_jack_gpio);
+
         return asoc_simple_card_unref(pdev);
 }