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 2cadf08..b48565e 100644 (file)
--- 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: