commit 5000d2a76d0b9b43edfac198788697e5cb82e0e6
author Sujit Reddy Thumma <sthumma@codeaurora.org> Thu Nov 17 12:09:04 2011 +0530
committer Linux Build Service Account <lnxbuild@localhost> Wed Dec 07 09:15:57 2011 -0700
tree 1da7ac025ded1525a900d1cfbd611d64403c2da0
parent b9599f1d4d913ecc85cdd0ebe16dee8210120753

mmc: msm_sdcc: Turn off clocks if there is no active request

Turn off SDCC clocks when there is no active request posted to
the driver. This saves power and allows TCXO shutdown
in idle power collapse. This is useful when CONFIG_PM_RUNTIME
is disabled, otherwise the same it is taken care by runtime PM
functionality. The disable delay is set to 200msecs as not to be
aggressive which can impact performance.

Change-Id: Iaa91a02ad9b146c0fea98ba2d4880dc80c4d1ace
Signed-off-by: Sujit Reddy Thumma <sthumma@codeaurora.org>

drivers/mmc/host/msm_sdcc.h

diff --git a/drivers/mmc/host/msm_sdcc.h b/drivers/mmc/host/msm_sdcc.h
index ca3eed8..a8332e51 100644
--- a/drivers/mmc/host/msm_sdcc.h
+++ b/drivers/mmc/host/msm_sdcc.h
@@ -216,6 +216,7 @@
  * bad cards/controller to respond.
  */
 #define MSM_MMC_REQ_TIMEOUT	10000 /* msecs */
+#define MSM_MMC_DISABLE_TIMEOUT        200 /* msecs */
 
 /*
  * Controller HW limitations