1 files changed, 3 insertions, 0 deletions

diff --git a/include/media/v4l2-device.h b/include/media/v4l2-device.h
index 5d7146dc2913..3d8e96f6ceb3 100644
--- a/include/media/v4l2-device.h
+++ b/include/media/v4l2-device.h
@@ -44,6 +44,9 @@ struct v4l2_device {
         spinlock_t lock;
         /* unique device name, by default the driver name + bus ID */
         char name[V4L2_DEVICE_NAME_SIZE];
+        /* notify callback called by some sub-devices. */
+        void (*notify)(struct v4l2_subdev *sd,
+                        unsigned int notification, void *arg);
 };
 
 /* Initialize v4l2_dev and make dev->driver_data point to v4l2_dev.