mmc: sdhci-of-arasan: Skip Auto tuning for DDR50 mode in ZynqMP platform

ZynqMP platform does not perform auto tuning in DDR50 mode. Skip the
same while the card is operating in DDR50 mode.

Signed-off-by: Manish Narani <manish.narani@xilinx.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Link: https://lore.kernel.org/r/1623753837-21035-4-git-send-email-manish.narani@xilinx.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

diff --git a/drivers/mmc/host/sdhci-of-arasan.c b/drivers/mmc/host/sdhci-of-arasan.c
index e61dbe0cf9fe65dbe6098489c7083dfd8885fb40..0f6ef4f4582507b6b6d875735b83872ae78d6be0 100644 (file)
--- a/drivers/mmc/host/sdhci-of-arasan.c
+++ b/drivers/mmc/host/sdhci-of-arasan.c
@@ -894,6 +894,10 @@ static int arasan_zynqmp_execute_tuning(struct mmc_host *mmc, u32 opcode)
                                                           NODE_SD_1;
        int err;
 
+       /* ZynqMP SD controller does not perform auto tuning in DDR50 mode */
+       if (mmc->ios.timing == MMC_TIMING_UHS_DDR50)
+               return 0;
+
        arasan_zynqmp_dll_reset(host, device_id);
 
        err = sdhci_execute_tuning(mmc, opcode);