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From 0cc4e8a341f58683ee26bceb27e43cbb7bb3dc30 Mon Sep 17 00:00:00 2001
From: Steve Sakoman <steve@sakoman.com>
Date: Mon, 18 Jul 2011 23:13:41 -0500
Subject: [PATCH 16/22] 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 file changed, 3 insertions(+)
diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c
index 703013c..554237f 100644
--- a/drivers/mmc/host/omap_hsmmc.c
+++ b/drivers/mmc/host/omap_hsmmc.c
@@ -1562,6 +1562,9 @@ 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);
--
1.7.9.4
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