ENGR00210677: [MX60_ARM2]SDIO-WIFI: can not work.

enhance drive strength of sd pad ctrl to 40ohm otherwise it
will report error while trying to communicate with atheros
wifi.

error message looks like:
 - "mmc2: error -84 whilst initialising SDIO card"

Signed-off-by: Ryan QIAN <b32804@freescale.com>

diff --git a/arch/arm/plat-mxc/include/mach/iomux-mx6sl.h b/arch/arm/plat-mxc/include/mach/iomux-mx6sl.h
index 529ee99c2fa1456cd6add4c159ee3762af416894..5ce23184a540d7ef5364a2b332e4af2f4fda33c8 100755 (executable)
--- a/arch/arm/plat-mxc/include/mach/iomux-mx6sl.h
+++ b/arch/arm/plat-mxc/include/mach/iomux-mx6sl.h
@@ -37,7 +37,7 @@
 
 #define MX6SL_USDHC_PAD_CTRL (PAD_CTL_PKE | PAD_CTL_PUE |              \
                PAD_CTL_PUS_22K_UP  | PAD_CTL_SPEED_LOW |               \
-               PAD_CTL_DSE_80ohm   | PAD_CTL_SRE_FAST  | PAD_CTL_HYS)
+               PAD_CTL_DSE_40ohm   | PAD_CTL_SRE_FAST  | PAD_CTL_HYS)
 
 #define MX6SL_USDHC_PAD_CTRL_100MHZ (PAD_CTL_PKE | PAD_CTL_PUE |       \
                PAD_CTL_PUS_47K_UP  | PAD_CTL_SPEED_MED |               \