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sdhci: 8-bit data transfer width support

PATCH In review [email protected] 1 participant 1 message Aug 11, 2010

Subsystems (2)
MMC, SD and SDIO Secure digital host controller interface (SDHCI) driver
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PATCH 37/177 sdhci: 8-bit data transfer width support

From: Kyungmin Park <[email protected]>

Some host controllers such as s5pc110 support the WIDE8 feature.

Signed-off-by Kyungmin Park <[email protected]>
Cc Grant Likely <[email protected]>
Cc <[email protected]>
Signed-off-by Andrew Morton <[email protected]>

---

 drivers/mmc/host/sdhci.c |    5 +++++
 drivers/mmc/host/sdhci.h |    1 +
 2 files changed, 6 insertions(+)
drivers/mmc/host/sdhci.c renamed from drivers/mmc/host/sdhci.c~sdhci-8-bit-data-transfer-width-support +5 -0
diff -puN drivers/mmc/host/sdhci.c~sdhci-8-bit-data-transfer-width-support 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
drivers/mmc/host/sdhci.h renamed from drivers/mmc/host/sdhci.h~sdhci-8-bit-data-transfer-width-support +1 -0
diff -puN drivers/mmc/host/sdhci.h~sdhci-8-bit-data-transfer-width-support 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

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