media: ca-reset.rst: add some description to this ioctl

While we don't have any documentation for it, based on what's
there at Kaffeine and VDR, it seems that this command should
be issued before start using CA. So, document it as such.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

diff --git a/Documentation/media/uapi/dvb/ca-reset.rst b/Documentation/media/uapi/dvb/ca-reset.rst
index 477313121a6508966f41600cd369c3a0d5ba0f3c..a5dd2797a92f01397b076a5aa2c5754f51a6fc20 100644 (file)
--- a/Documentation/media/uapi/dvb/ca-reset.rst
+++ b/Documentation/media/uapi/dvb/ca-reset.rst
@@ -28,7 +28,8 @@ Arguments
 Description
 -----------
 
-.. note:: This ioctl is undocumented. Documentation is welcome.
+Puts the Conditional Access hardware on its initial state. It should
+be called before start using the CA hardware.
 
 
 Return Value