2 files changed, 26 insertions, 0 deletions

diff --git a/linux/include/media/v4l2-device.h b/linux/include/media/v4l2-device.h
index 9afd39fb2..5d5d550e6 100644
--- a/linux/include/media/v4l2-device.h
+++ b/linux/include/media/v4l2-device.h
@@ -53,10 +53,31 @@ struct v4l2_device {
    dev may be NULL in rare cases (ISA devices). In that case you
    must fill in the v4l2_dev->name field before calling this function. */
 int __must_check v4l2_device_register(struct device *dev, struct v4l2_device *v4l2_dev);
+
+/* Optional function to initialize the name field of struct v4l2_device using
+   the driver name and a driver-global atomic_t instance.
+   This function will increment the instance counter and returns the instance
+   value used in the name.
+
+   Example:
+
+   static atomic_t drv_instance = ATOMIC_INIT(0);
+
+   ...
+
+   instance = v4l2_device_set_name(&v4l2_dev, "foo", &drv_instance);
+
+   The first time this is called the name field will be set to foo0 and
+   this function returns 0. If the name ends with a digit (e.g. cx18),
+   then the name will be set to cx18-0 since cx180 looks really odd. */
+int v4l2_device_set_name(struct v4l2_device *v4l2_dev, const char *basename,
+						atomic_t *instance);
+
 /* Set v4l2_dev->dev to NULL. Call when the USB parent disconnects.
    Since the parent disappears this ensures that v4l2_dev doesn't have an
    invalid parent pointer. */
 void v4l2_device_disconnect(struct v4l2_device *v4l2_dev);
+
 /* Unregister all sub-devices and any other resources related to v4l2_dev. */
 void v4l2_device_unregister(struct v4l2_device *v4l2_dev);
 
diff --git a/linux/include/media/v4l2-subdev.h b/linux/include/media/v4l2-subdev.h
index 17856081c..a503e1cee 100644
--- a/linux/include/media/v4l2-subdev.h
+++ b/linux/include/media/v4l2-subdev.h
@@ -230,12 +230,16 @@ struct v4l2_subdev_ops {
 
 #define V4L2_SUBDEV_NAME_SIZE 32
 
+/* Set this flag if this subdev is a i2c device. */
+#define V4L2_SUBDEV_FL_IS_I2C (1U << 0)
+
 /* Each instance of a subdev driver should create this struct, either
    stand-alone or embedded in a larger struct.
  */
 struct v4l2_subdev {
 	struct list_head list;
 	struct module *owner;
+	u32 flags;
 	struct v4l2_device *v4l2_dev;
 	const struct v4l2_subdev_ops *ops;
 	/* name must be unique */
@@ -264,6 +268,7 @@ static inline void v4l2_subdev_init(struct v4l2_subdev *sd,
 	BUG_ON(!ops || !ops->core);
 	sd->ops = ops;
 	sd->v4l2_dev = NULL;
+	sd->flags = 0;
 	sd->name[0] = '\0';
 	sd->grp_id = 0;
 	sd->priv = NULL;