From: hexdump <hexdump0815@googlemail.com>

adjusted according to the kernel timing in arch/arm/boot/dts/exynos5250-snow-common.dtsi

        samsung,dw-mshc-ciu-div = <3>;
        samsung,dw-mshc-sdr-timing = <2 3>;
        samsung,dw-mshc-ddr-timing = <1 2>;

resulting in 2 3 3 for sdr timing + div 3

diff --git a/arch/arm/dts/exynos5250-snow.dts b/arch/arm/dts/exynos5250-snow.dts
index e41f2d3041..67a2ec34d2 100644
--- a/arch/arm/dts/exynos5250-snow.dts
+++ b/arch/arm/dts/exynos5250-snow.dts
@@ -312,8 +312,11 @@
 
 	mmc@12220000 {
 		samsung,bus-width = <4>;
-		samsung,timing = <1 2 3>;
+		samsung,timing = <2 3 3>;
 		samsung,removable = <1>;
+//		no-1-8-v;
+//		cap-sd-highspeed;
+//		card-detect-delay = <500>;
 	};
 
 	mmc@12230000 {
