X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=include%2Fmedia%2Fv4l2-device.h;h=5d5d550e63ad0e2c7a0c1811a42e1f031743068a;hb=d8d9129ea28e2177749627c82962feb26e8d11e9;hp=3d8e96f6ceb30716d29c6f6e83793e26f1aef2e8;hpb=98ec633972a70cf71d71bc8762804f0af4792d08;p=safe%2Fjmp%2Flinux-2.6

diff --git a/include/media/v4l2-device.h b/include/media/v4l2-device.h
index 3d8e96f..5d5d550 100644
--- a/include/media/v4l2-device.h
+++ b/include/media/v4l2-device.h
@@ -30,7 +30,7 @@
    basic V4L2 device-level support.
  */
 
-#define V4L2_DEVICE_NAME_SIZE (BUS_ID_SIZE + 16)
+#define V4L2_DEVICE_NAME_SIZE (20 + 16)
 
 struct v4l2_device {
 	/* dev->driver_data points to this struct.
@@ -53,7 +53,32 @@ 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);
-/* Set v4l2_dev->dev->driver_data to NULL and unregister all sub-devices */
+
+/* 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);
 
 /* Register a subdev with a v4l2 device. While registered the subdev module