tree b823b6f47ba5ffb3f0b7d7367a08893bb9029638
parent 812e8b22ea55218449de310a666dd1ce16f924ed
author Guennadi Liakhovetski <g.liakhovetski@gmx.de> 1354617735 -0300
committer Mauro Carvalho Chehab <mchehab@redhat.com> 1371842882 -0300

[media] V4L2: add temporary clock helpers

Typical video devices like camera sensors require an external clock source.
Many such devices cannot even access their hardware registers without a
running clock. These clock sources should be controlled by their consumers.
This should be performed, using the generic clock framework. Unfortunately
so far only very few systems have been ported to that framework. This patch
adds a set of temporary helpers, mimicking the generic clock API, to V4L2.
Platforms, adopting the clock API, should switch to using it. Eventually
this temporary API should be removed.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>