Commit 9e4703df authored by yangbo lu's avatar yangbo lu Committed by Ulf Hansson

mmc: sdhci-of-esdhc: avoid writing power control register

The eSDHC doesn't have a standard power control register, so when
writing this register in stack we should do nothing to avoid
incorrect operation.
Signed-off-by: default avatarYangbo Lu <yangbo.lu@freescale.com>
Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent a599579e
...@@ -182,6 +182,12 @@ static u32 esdhc_writeb_fixup(struct sdhci_host *host, ...@@ -182,6 +182,12 @@ static u32 esdhc_writeb_fixup(struct sdhci_host *host,
u8 tmp; u8 tmp;
int shift = (spec_reg & 0x3) * 8; int shift = (spec_reg & 0x3) * 8;
/*
* eSDHC doesn't have a standard power control register, so we do
* nothing here to avoid incorrect operation.
*/
if (spec_reg == SDHCI_POWER_CONTROL)
return old_value;
/* /*
* "DMA select" location is offset 0x28 in SD specification, but on * "DMA select" location is offset 0x28 in SD specification, but on
* P5020 or P3041, it's located at 0x29. * P5020 or P3041, it's located at 0x29.
......
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