[patch 037/177] sdhci: 8-bit data transfer width support

[patch 037/177] sdhci: 8-bit data transfer width support

[akpm]

From: Kyungmin Park <kyungmin.park@samsung.com>

Some host controllers such as s5pc110 support the WIDE8 feature.

Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: <linux-mmc@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 drivers/mmc/host/sdhci.c |    5 +++++
 drivers/mmc/host/sdhci.h |    1 +
 2 files changed, 6 insertions(+)

diff -puN drivers/mmc/host/sdhci.c~sdhci-8-bit-data-transfer-width-support drivers/mmc/host/sdhci.c
--- a/drivers/mmc/host/sdhci.c~sdhci-8-bit-data-transfer-width-support
+++ a/drivers/mmc/host/sdhci.c
@@ -1159,6 +1159,11 @@ static void sdhci_set_ios(struct mmc_hos
 
 	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
diff -puN drivers/mmc/host/sdhci.h~sdhci-8-bit-data-transfer-width-support drivers/mmc/host/sdhci.h
--- a/drivers/mmc/host/sdhci.h~sdhci-8-bit-data-transfer-width-support
+++ a/drivers/mmc/host/sdhci.h
@@ -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
_