tree 58ea3c51ea0c173fd0250ad3f1151defc332b195
parent 865dbd3525a629388119b567ef0bec87f4a01556
author Shubhraprakash Das <sadas@codeaurora.org> 1389305231 -0800
committer Tarun Karra <tkarra@codeaurora.org> 1391477960 -0800

msm: kgsl: Refcount mmu clock calls and allow multiple disable events

Allow each mmu clock enable call to enable the clock and let the
clock driver refcounting mechanism deal with switching the clock
off at the right time. This also means that each enable call should
have a disable call or a disable event registered, so allow for
multiple disable events to be registered. This simplifies the mmu
clock handling mechanism which is better for multiple ringbuffer
implementation. With multiple ringbuffers each global timestamp is
tied to a specific ringbuffer and with a single clock disable event
it is hard to figure out when the clock should be turned off.

CRs-fixed: 597193 592485
Change-Id: I924c545140bd19d95890a5fdfd0382c511abe973
Signed-off-by: Shubhraprakash Das <sadas@codeaurora.org>
Signed-off-by: Tarun Karra <tkarra@codeaurora.org>