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From kernel-bounces@lists.fedoraproject.org Thu Sep 9 09:23:49 2010
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Kyle McMartin |
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From: Stanislaw Gruszka <sgruszka@redhat.com>
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Subject: [PATCH 1/3] sdhci: 8-bit data transfer width support
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Kyle McMartin |
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Date: Thu, 9 Sep 2010 15:24:10 +0200
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From: Kyungmin Park <kyungmin.park@samsung.com>
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Upstream ae6d6c92212e94b12ab9365c23fb73acc2c3c2e7 commit.
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Kyle McMartin |
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Some host controllers such as s5pc110 support the WIDE8 feature.
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Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
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Cc: Grant Likely <grant.likely@secretlab.ca>
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Cc: <linux-mmc@vger.kernel.org>
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Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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---
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drivers/mmc/host/sdhci.c | 5 +++++
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drivers/mmc/host/sdhci.h | 1 +
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2 files changed, 6 insertions(+), 0 deletions(-)
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diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
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index c6d1bd8..955cad9 100644
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--- a/drivers/mmc/host/sdhci.c
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+++ b/drivers/mmc/host/sdhci.c
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@@ -1159,6 +1159,11 @@ static void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
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ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL);
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+ if (ios->bus_width == MMC_BUS_WIDTH_8)
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+ ctrl |= SDHCI_CTRL_8BITBUS;
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+ else
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+ ctrl &= ~SDHCI_CTRL_8BITBUS;
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+
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if (ios->bus_width == MMC_BUS_WIDTH_4)
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ctrl |= SDHCI_CTRL_4BITBUS;
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else
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diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
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index c846813..eb5efe0 100644
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--- a/drivers/mmc/host/sdhci.h
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+++ b/drivers/mmc/host/sdhci.h
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@@ -72,6 +72,7 @@
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#define SDHCI_CTRL_ADMA1 0x08
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#define SDHCI_CTRL_ADMA32 0x10
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#define SDHCI_CTRL_ADMA64 0x18
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+#define SDHCI_CTRL_8BITBUS 0x20
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#define SDHCI_POWER_CONTROL 0x29
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#define SDHCI_POWER_ON 0x01
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--
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Kyle McMartin |
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1.7.1
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Kyle McMartin |
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_______________________________________________
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Kyle McMartin |
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kernel mailing list
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Kyle McMartin |
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kernel@lists.fedoraproject.org
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Kyle McMartin |
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https://admin.fedoraproject.org/mailman/listinfo/kernel
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Kyle McMartin |
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