arm: dts: artik710: optimize shift of eMMC

This patch modifies drive_shift and sample_shift of eMMC.
The drive_shift can have from 0 to 3 values. The meanings of the
values are degree of the phase shifted clock.

0: 0 degree phase shifted clock
1: 90 degree phase shifted clock
2: 180 degree phase shifted clock
3: 270 degree phase shifted clock

In the same as drive_shift, the sample_shift can have values as 0
to 3. The meanings of values are also the same.

There are sometimes fastboot fail with some targets, and this patch
solves it.

Change-Id: I05ccd615f032c7f65f52f293a2b3d9ba111d9bd3
Signed-off-by: Sowon Na <sowon.na@samsung.com>

diff --git a/arch/arm/dts/s5p6818-artik710-raptor.dts b/arch/arm/dts/s5p6818-artik710-raptor.dts
index f4fc6e9c0df3eb2cf8f26cd6d5f9c6c0148afbda..df18c1a69adb87ef5bf62d0542a1cca66a9bc03d 100644 (file)
--- a/arch/arm/dts/s5p6818-artik710-raptor.dts
+++ b/arch/arm/dts/s5p6818-artik710-raptor.dts
@@ -27,9 +27,9 @@
        mmc2:mmc@c0069000 {
                frequency = <100000000>;
                nexell,drive_dly = <0x0>;
-               nexell,drive_shift = <0x03>;
+               nexell,drive_shift = <0x00>;
                nexell,sample_dly = <0x00>;
-               nexell,sample_shift = <0x02>;
+               nexell,sample_shift = <0x01>;
                nexell,bus-width = <4>;
                index = <2>;
                status = "okay";