From: Weijun Yang <york.yang@csr.com>
Date: Sun, 4 Oct 2015 12:04:12 +0000 (+0000)
Subject: mmc: sdhci: enable tuning for DDR50
X-Git-Tag: v4.4-rc1~173^2~47
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=9faac7b95ea4;p=linux.git

mmc: sdhci: enable tuning for DDR50

CMD19 tuning is also available for DDR50 mode.

Signed-off-by: Weijun Yang <york.yang@csr.com>
Signed-off-by: Barry Song <Baohua.Song@csr.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
---

diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 2cadf0891f15..b48565ed5616 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -1895,9 +1895,9 @@ static int sdhci_execute_tuning(struct mmc_host *mmc, u32 opcode)
 		tuning_count = host->tuning_count;
 
 	/*
-	 * The Host Controller needs tuning only in case of SDR104 mode
-	 * and for SDR50 mode when Use Tuning for SDR50 is set in the
-	 * Capabilities register.
+	 * The Host Controller needs tuning in case of SDR104 and DDR50
+	 * mode, and for SDR50 mode when Use Tuning for SDR50 is set in
+	 * the Capabilities register.
 	 * If the Host Controller supports the HS200 mode then the
 	 * tuning function has to be executed.
 	 */
@@ -1917,6 +1917,7 @@ static int sdhci_execute_tuning(struct mmc_host *mmc, u32 opcode)
 		break;
 
 	case MMC_TIMING_UHS_SDR104:
+	case MMC_TIMING_UHS_DDR50:
 		break;
 
 	case MMC_TIMING_UHS_SDR50: