ASoC: Allow GPIO jack detection to be configured as a wake source

Some systems wish to use jacks as wake sources. Provide a wake flag in the
GPIO configuration which causes the driver to enable the IRQ as a wake
source.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>

2 files changed, 11 insertions, 0 deletions

diff --git a/include/sound/soc.h b/include/sound/soc.h
index 4ccf1e4e0dd0..fb57c33482e5 100644
--- a/include/sound/soc.h
+++ b/include/sound/soc.h
@@ -436,6 +436,7 @@ struct snd_soc_jack_zone {
  * @report:       value to report when jack detected
  * @invert:       report presence in low state
  * @debouce_time: debouce time in ms
+ * @wake:         enable as wake source
  */
 #ifdef CONFIG_GPIOLIB
 struct snd_soc_jack_gpio {
@@ -444,6 +445,8 @@ struct snd_soc_jack_gpio {
         int report;
         int invert;
         int debounce_time;
+        bool wake;
+
         struct snd_soc_jack *jack;
         struct delayed_work work;
 
diff --git a/sound/soc/soc-jack.c b/sound/soc/soc-jack.c
index 4579ee090bbf..1382251ed2a2 100644
--- a/sound/soc/soc-jack.c
+++ b/sound/soc/soc-jack.c
@@ -330,6 +330,14 @@ int snd_soc_jack_add_gpios(struct snd_soc_jack *jack, int count,
                 if (ret)
                         goto err;
 
+                if (gpios[i].wake) {
+                        ret = set_irq_wake(gpio_to_irq(gpios[i].gpio), 1);
+                        if (ret != 0)
+                                printk(KERN_ERR
+                                  "Failed to mark GPIO %d as wake source: %d\n",
+                                        gpios[i].gpio, ret);
+                }
+
 #ifdef CONFIG_GPIO_SYSFS
                 /* Expose GPIO value over sysfs for diagnostic purposes */
                 gpio_export(gpios[i].gpio, false);