[PATCH 1/3] sdhci: 8-bit data transfer width support

From: Kyungmin Park <kyungmin.park(a)samsung.com&gt; Upstream ae6d6c92212e94b12ab9365c23fb73acc2c3c2e7 commit. Some host controllers such as s5pc110 support the WIDE8 feature. Signed-off-by: Kyungmin Park <kyungmin.park(a)samsung.com&gt; Cc: Grant Likely <grant.likely(a)secretlab.ca&gt; Cc: <linux-mmc(a)vger.kernel.org&gt; Signed-off-by: Andrew Morton <akpm(a)linux-foundation.org&gt; Signed-off-by: Linus Torvalds <torvalds(a)linux-foundation.org&gt; --- drivers/mmc/host/sdhci.c | 5 +++++ drivers/mmc/host/sdhci.h | 1 + 2 files changed, 6 insertions(+), 0 deletions(-) diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index c6d1bd8..955cad9 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 c846813..eb5efe0 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 -- 1.7.1