[media] v4l: Add flash control documentation

Add documentation for V4L2 flash controls.

Signed-off-by: Sakari Ailus <sakari.ailus@iki.fi>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/Documentation/DocBook/media/v4l/vidioc-g-ext-ctrls.xml b/Documentation/DocBook/media/v4l/vidioc-g-ext-ctrls.xml
index 5e73517fa232..5122ce87e0b8 100644
--- a/Documentation/DocBook/media/v4l/vidioc-g-ext-ctrls.xml
+++ b/Documentation/DocBook/media/v4l/vidioc-g-ext-ctrls.xml
@@ -250,6 +250,13 @@ These controls are described in <xref
 These controls are described in <xref
                 linkend="fm-tx-controls" />.</entry>
           </row>
+          <row>
+            <entry><constant>V4L2_CTRL_CLASS_FLASH</constant></entry>
+            <entry>0x9c0000</entry>
+            <entry>The class containing flash device controls.
+These controls are described in <xref
+                linkend="flash-controls" />.</entry>
+          </row>
         </tbody>
       </tgroup>
     </table>