mmc: dw_mmc: Clear the DDR mode for non-DDR
UHS_REG should be cleared for non-DDR mode. But currently there is
no way to clear DDR mode, if it is already set once. This patch adds
clearing DDR mode for non-DDR mode.
Signed-off-by: Seungwon Jeon <tgih.jun@samsung.com>
Acked-by: Will Newton <will.newton@imgtec.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
index c583b94..94e22382 100644
--- a/drivers/mmc/host/dw_mmc.c
+++ b/drivers/mmc/host/dw_mmc.c
@@ -707,12 +707,15 @@
break;
}
+ regs = mci_readl(slot->host, UHS_REG);
+
/* DDR mode set */
- if (ios->timing == MMC_TIMING_UHS_DDR50) {
- regs = mci_readl(slot->host, UHS_REG);
+ if (ios->timing == MMC_TIMING_UHS_DDR50)
regs |= (0x1 << slot->id) << 16;
- mci_writel(slot->host, UHS_REG, regs);
- }
+ else
+ regs &= ~(0x1 << slot->id) << 16;
+
+ mci_writel(slot->host, UHS_REG, regs);
if (ios->clock) {
/*