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-DDD mode.
Signed-off-by: Seungwon Jeon <[email protected]> --- drivers/mmc/host/dw_mmc.c | 11 +++++++---- 1 files changed, 7 insertions(+), 4 deletions(-) diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c index c583b94..94e2238 100644 --- a/drivers/mmc/host/dw_mmc.c +++ b/drivers/mmc/host/dw_mmc.c @@ -707,12 +707,15 @@ static void dw_mci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) 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) { /* -- 1.7.0.4 -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
