diff options
| author | Kyungmin Park <kyungmin.park@samsung.com> | 2010-08-10 18:01:43 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-08-11 08:59:03 -0700 |
| commit | ae6d6c92212e94b12ab9365c23fb73acc2c3c2e7 (patch) | |
| tree | ab0337dcb0528d39c8c34cecb845c22b42e50c51 /drivers/mmc | |
| parent | cfd1f82f20e0c557a061189f7d8c30d623fbe313 (diff) | |
sdhci: 8-bit data transfer width support
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>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/host/sdhci.c | 5 | ||||
| -rw-r--r-- | 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 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 |