kbuild: Allow adding out-of-tree DTBs to image

It's useful to build a FIT image with DTBs stored outside of the kernel
tree, for instance to test vendor-supplied DTBs. Support this by
allowing DTB paths to be absolute. Compilation of the DTB is skipped in
that case.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/kbuild.sh b/kbuild.sh
index 3f20151..d526aad 100755
--- a/kbuild.sh
+++ b/kbuild.sh
@@ -251,6 +251,11 @@ kernel_dtbs=
 if [[ ${do_build[dt]} == 1 ]] ; then
 	for dtb in ${dtbs[@]} ; do
 		dtb=${dtb/:*/}
+
+		if [[ "${dtb}" == /* ]] ; then
+			continue
+		fi
+
 		kernel_dtbs="$kernel_dtbs $dtb"
 	done
 fi
@@ -324,6 +329,12 @@ copy_dtbs() {
 			dst=$(basename $dst)
 		fi
 
+		# The destination should never be an absolute path.
+		if [[ "${dst}" == /* ]] ; then
+			echo "Error: DTB destination ${dtb} can't be absolute path"
+			exit 1
+		fi
+
 		mkdir -p $(dirname $dest_dir/$dst)
 		cp $output_dir/arch/${arch}/boot/dts/$src* $dest_dir/$dst
 	done