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Commit ae6d6c92 authored by Kyungmin Park's avatar Kyungmin Park Committed by Linus Torvalds
Browse files

sdhci: 8-bit data transfer width support 



Some host controllers such as s5pc110 support the WIDE8 feature.

Signed-off-by: default avatarKyungmin Park <kyungmin.park@samsung.com>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: <linux-mmc@vger.kernel.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent cfd1f82f

drivers/mmc/host/sdhci.c

+5 −0
Original line number Diff line number Diff line
@@ -1159,6 +1159,11 @@ static void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) 


	ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL);



	if (ios->bus_width == MMC_BUS_WIDTH_8)

		ctrl |= SDHCI_CTRL_8BITBUS;

	else

		ctrl &= ~SDHCI_CTRL_8BITBUS;



	if (ios->bus_width == MMC_BUS_WIDTH_4)

		ctrl |= SDHCI_CTRL_4BITBUS;

	else

drivers/mmc/host/sdhci.h

+1 −0
Original line number Diff line number Diff line
@@ -72,6 +72,7 @@ 
#define   SDHCI_CTRL_ADMA1	0x08

#define   SDHCI_CTRL_ADMA32	0x10

#define   SDHCI_CTRL_ADMA64	0x18

#define  SDHCI_CTRL_8BITBUS	0x20



#define SDHCI_POWER_CONTROL	0x29

#define  SDHCI_POWER_ON		0x01