From ae6d6c92212e94b12ab9365c23fb73acc2c3c2e7 Mon Sep 17 00:00:00 2001 From: Kyungmin Park Date: Tue, 10 Aug 2010 18:01:43 -0700 Subject: sdhci: 8-bit data transfer width support Some host controllers such as s5pc110 support the WIDE8 feature. Signed-off-by: Kyungmin Park Cc: Grant Likely Cc: Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/mmc/host/sdhci.c | 5 +++++ drivers/mmc/host/sdhci.h | 1 + 2 files changed, 6 insertions(+) diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index 8da164bef04..f34ec5d6bcc 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -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 diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h index b1839a315b8..030de492880 100644 --- a/drivers/mmc/host/sdhci.h +++ b/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 -- cgit v1.2.3-18-g5258