[ALSA] virtuoso: monitor external power on D2X

On the Xonar D2X, monitor the GPIO pin that indicates whether external
power is present.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>

1 files changed, 2 insertions, 0 deletions

diff --git a/sound/pci/oxygen/oxygen.h b/sound/pci/oxygen/oxygen.h
index e71c53498995..ad50fb8b206b 100644
--- a/sound/pci/oxygen/oxygen.h
+++ b/sound/pci/oxygen/oxygen.h
@@ -66,6 +66,7 @@ struct oxygen {
         struct snd_pcm_substream *streams[PCM_COUNT];
         struct snd_kcontrol *controls[CONTROL_COUNT];
         struct work_struct spdif_input_bits_work;
+        struct work_struct gpio_work;
         wait_queue_head_t ac97_waitqueue;
 };
 
@@ -88,6 +89,7 @@ struct oxygen_model {
         void (*update_dac_mute)(struct oxygen *chip);
         void (*ac97_switch_hook)(struct oxygen *chip, unsigned int codec,
                                  unsigned int reg, int mute);
+        void (*gpio_changed)(struct oxygen *chip);
         size_t model_data_size;
         u8 dac_channels;
         u8 used_channels;