[PATCH 08/47] davinci: dm365: disable pulldowns for all MMC/SD1 pins.

Kevin Hilman khilman at deeprootsystems.com
Fri Oct 1 17:29:32 EDT 2010

From: Sekhar Nori <nsekhar at ti.com>

This patch disables internal pulldowns for all MMC/SD1
pins. Presently only MMCSD1_CMD pin's pull down is
disabled, but with this some MMC/SD cards do not get
detected on MMC/SD1 slot of the EVM.

The problem was reproducible with SanDisk 4GB SDHC card.

Reported-by: Stephane Bovagne <s-bovagne at ti.com>
Signed-off-by: Sekhar Nori <nsekhar at ti.com>
Signed-off-by: Kevin Hilman <khilman at deeprootsystems.com>
 arch/arm/mach-davinci/devices.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/arch/arm/mach-davinci/devices.c b/arch/arm/mach-davinci/devices.c
index 8b7201e..2a9a252 100644
--- a/arch/arm/mach-davinci/devices.c
+++ b/arch/arm/mach-davinci/devices.c
@@ -213,7 +213,7 @@ void __init davinci_setup_mmc(int module, struct davinci_mmc_config *config)
 			/* Configure pull down control */
-			__raw_writel((__raw_readl(pupdctl1) & ~0x400),
+			__raw_writel((__raw_readl(pupdctl1) & ~0xfc0),
 			mmcsd1_resources[0].start = DM365_MMCSD1_BASE;

More information about the linux-arm-kernel mailing list