From: Kyungmin Park <kyungmin.park@samsung.com>
To: linux-mmc@vger.kernel.org, akpm@linux-foundation.org
Subject: [PATCH 3/3] SDHCI: 8-bit data transfer width support
Date: Sat, 12 Jun 2010 14:45:02 +0900 [thread overview]
Message-ID: <20100612054502.GA25686@july> (raw)
From: Kyungmin Park <kyungmin.park@samsung.com>
Some host constroller such as s5pc110 has WIDE8 support feature.
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
---
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 142419c..6cf018a 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
--
1.5.3.3
next reply other threads:[~2010-06-12 5:45 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-06-12 5:45 Kyungmin Park [this message]
2010-06-28 18:39 ` [PATCH 3/3] SDHCI: 8-bit data transfer width support Andrew Morton
2010-06-28 18:56 ` Colin Cross
2010-06-28 19:33 ` Olof Johansson
2010-06-28 19:48 ` Grant Likely
2010-06-29 18:37 ` Andrew Morton
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