Commit 27d29e2b authored Jul 21, 2016 by Sayali Lokhande Committed by Xiaonian Wang Apr 07, 2017

mmc: host: Add check for post tuning in HS400



'commit 34e4cf13f729 ("mmc: core: Update HS400 timing
mode before performing tuning")' updates timing mode
to HS400 before tuning in mmc_hs200_tuning.
On 4.4 kernel, there is check added to bail out from
execute_tuning if HS400 tuning is done in HS200 mode.

Adding check to avoid bailing out and allow
execute_tuning if POST_TUNING capability is set.

Change-Id: I259da28050e5da0c96251cb99176386927b596f0
Signed-off-by: Sayali Lokhande <sayalil@codeaurora.org>

parent 9150a94a

drivers/mmc/host/sdhci.c

+4 −3

Original line number	Diff line number	Diff line
		@@ -2371,9 +2371,10 @@ static int sdhci_execute_tuning(struct mmc_host *mmc, u32 opcode)
		switch (host->timing) {
		/* HS400 tuning is done in HS200 mode */
		case MMC_TIMING_MMC_HS400:
		if (!(mmc->caps2 & MMC_CAP2_HS400_POST_TUNING)) {
		err = -EINVAL;
		goto out_unlock;

		}
		case MMC_TIMING_MMC_HS200:
		/*
		* Periodic re-tuning for HS400 is not expected to be needed, so