Commit 3ae97c70 authored May 18, 2017 by Veerabhadrarao Badiganti Committed by Subhash Jadavani May 26, 2017

mmc: core: retune after un-gating the clocks

We have seen that host controller's clock tuning circuit may go out of sync
if controller clocks are gated. To workaround this issue, we are now
triggering the retuning of tuning circuit once clocks are ungated.

Change-Id: Id2db1cb4829fbb1af4f8c4e463d1e16c0f45e590
Signed-off-by: Veerabhadrarao Badiganti <vbadigan@codeaurora.org>
Signed-off-by: Subhash Jadavani <subhashj@codeaurora.org>

parent f48b62b7

drivers/mmc/core/core.c

+7 −0

Original line number	Diff line number	Diff line
		@@ -2368,6 +2368,13 @@ void mmc_ungate_clock(struct mmc_host *host)
		WARN_ON(host->ios.clock);
		/* This call will also set host->clk_gated to false */
		__mmc_set_clock(host, host->clk_old);
		/*
		* We have seen that host controller's clock tuning circuit may
		* go out of sync if controller clocks are gated.
		* To workaround this issue, we are triggering retuning of the
		* tuning circuit after ungating the controller clocks.
		*/
		mmc_retune_needed(host);
		}
		}