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linux 3.0: Add patch from OE to set dto to max value to fix MMC timeouts

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Signed-off-by: Joel A Fernandes <agnel.joel@gmail.com>
Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>
This commit is contained in:
Joel A Fernandes
2011-08-09 02:14:34 +00:00
committed by Koen Kooi
parent 64b913c584
commit dc4bed58b8
2 changed files with 35 additions and 1 deletions
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recipes-kernel/linux/linux-3.0/beagle/0006-omap-mmc-Adjust-dto-to-eliminate-timeout-errors.patch
+33
View File
@@ -0,0 +1,33 @@
From bd0b2f97c48aa6aac0c6a494f1c6ba5af5de486b Mon Sep 17 00:00:00 2001
From: Steve Sakoman <steve@sakoman.com>
Date: Mon, 18 Jul 2011 23:13:41 -0500
Subject: [PATCH] omap_hsmmc: Set dto to max value of 14 to avoid SD Card timeouts
This fixes MMC errors due to timeouts on certain SD Cards following suggestions
to set dto to 14 by Jason Kridner and Steven Kipisz
Details of the issue:
http://talk.maemo.org/showthread.php?p=1000707#post1000707
This fix was originally proposed by Sukumar Ghoral of TI.
---
drivers/mmc/host/omap_hsmmc.c | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)
diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c
index 9646a75..7443647 100644
--- a/drivers/mmc/host/omap_hsmmc.c
+++ b/drivers/mmc/host/omap_hsmmc.c
@@ -1049,6 +1049,9 @@ static void set_data_timeout(struct omap_hsmmc_host *host,
dto = 14;
}
+ /* Set dto to max value of 14 to avoid SD Card timeouts */
+ dto = 14;
+
reg &= ~DTO_MASK;
reg |= dto << DTO_SHIFT;
OMAP_HSMMC_WRITE(host->base, SYSCTL, reg);
--
1.7.0.4