diff options
author | Hyeonsu Kim <hyeonsu.kim@samsung.com> | 2013-02-22 00:32:46 (GMT) |
---|---|---|
committer | Chris Ball <cjb@laptop.org> | 2013-03-22 16:03:22 (GMT) |
commit | c69042a51e7d890c373345a7e524e895b266eb72 (patch) | |
tree | 338448164f9f80284776775dea8d4f0e25de14c4 /drivers/mmc | |
parent | 87a74d399a165510b053c406699992af9add0da9 (diff) | |
download | linux-fsl-qoriq-c69042a51e7d890c373345a7e524e895b266eb72.tar.xz |
mmc: dw_mmc: fixed a wrong UHS_REG 16 bit clear
In the legacy code, driver clear not only UHS_REG 16 bit also 0-15bit.
If we use UHS-1 mode spec card like SDR50, SDR104. UHS_REG 0-15 should
be set by 1 according to slot id. In this case, legacy code can cause
problems.
In particular, UHS_REG consists of DDR_REG[31:16] and VOLT_REG[15:0].
Before adjusting this patch, bit[15:0] is always cleared.
Signed-off-by: Hyeonsu Kim <hyeonsu.kim@samsung.com>
Acked-by: Jaehoon Chung <jh80.chung@samsung.com>
Acked-by: Seungwon Jeon <tgih.jun@samsung.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'drivers/mmc')
-rw-r--r-- | drivers/mmc/host/dw_mmc.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c index 2f4a62f..38732d8 100644 --- a/drivers/mmc/host/dw_mmc.c +++ b/drivers/mmc/host/dw_mmc.c @@ -795,9 +795,9 @@ static void dw_mci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) /* DDR mode set */ if (ios->timing == MMC_TIMING_UHS_DDR50) - regs |= (0x1 << slot->id) << 16; + regs |= ((0x1 << slot->id) << 16); else - regs &= ~(0x1 << slot->id) << 16; + regs &= ~((0x1 << slot->id) << 16); mci_writel(slot->host, UHS_REG, regs); |