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

drivers/mmc/host/sdhci-of-esdhc.c

+6 −0
Original line number Diff line number Diff line
@@ -182,6 +182,12 @@ static u32 esdhc_writeb_fixup(struct sdhci_host *host, 
	u8 tmp;

	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

	 * P5020 or P3041, it's located at 0x29.