Commit 3f514291 authored Jan 02, 2012 by Seungwon Jeon Committed by Chris Ball Jan 12, 2012

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>

parent dd8df17f

drivers/mmc/host/dw_mmc.c

+7 −4

Original line number	Diff line number	Diff line
		@@ -707,12 +707,15 @@ static void dw_mci_set_ios(struct mmc_host mmc, struct mmc_ios ios)
		break;
		}

		/* DDR mode set */
		if (ios->timing == MMC_TIMING_UHS_DDR50) {
		regs = mci_readl(slot->host, UHS_REG);

		/* DDR mode set */
		if (ios->timing == MMC_TIMING_UHS_DDR50)
		regs \|= (0x1 << slot->id) << 16;
		else
		regs &= ~(0x1 << slot->id) << 16;

		mci_writel(slot->host, UHS_REG, regs);
		}

		if (ios->clock) {
		/*