Allow pick device tree by specifying an environment variable.

The default device tree used by the make system is
board/nvidia/seaboard/tegra2-seaboard.dts, it is expected to be
defined in the main config file used by the related targets. If
'DEV_TREE_SRC' is defined in the environment, the file
board/nvidia/seaboard/${DEV_TREE_SRC} is used as the device tree
source instead. ./mkconfig is being restored to remove the device
tree related changes.

BUG=chromium-os:834
TEST=manual

Change-Id: I2232c5f4413b719057ec3def77ca03a78068c3c9
Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Reviewed-on: http://gerrit.chromium.org/gerrit/2776
Reviewed-by: Simon Glass <sjg@chromium.org>

1 files changed, 1 insertions, 4 deletions

diff --git a/mkconfig b/mkconfig
index 04ea12a464..6ff533f339 100755
--- a/mkconfig
+++ b/mkconfig
@@ -127,10 +127,7 @@ echo "BOARD  = ${board}" >> config.mk
 
 [ "${vendor}" ] && echo "VENDOR = ${vendor}" >> config.mk
 
-if [ -n "${soc}" ] ; then
-	echo "SOC    = ${soc}" >> config.mk
-	echo "DEVICE_TREE = ${soc}-${board}" >> config.mk
-fi
+[ "${soc}"    ] && echo "SOC    = ${soc}"    >> config.mk
 
 # Assign board directory to BOARDIR variable
 if [ -z "${vendor}" ] ; then