new file mode 100755
@@ -0,0 +1,48 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Copyright 2024 Linaro Ltd.
+#
+# Usage: from the top level U-Boot source tree, run:
+# $ ./dts/update-dts-subtree.sh pull <release-tag>
+# $ ./dts/update-dts-subtree.sh pick <commit-id>
+#
+# The script will pull changes from devicetree-rebasing repo into U-Boot
+# as a subtree located as <U-Boot>/dts/upstream sub-directory. It will
+# automatically create a squash/merge commit listing the commits imported.
+
+set -e
+
+merge_commit_msg=$(cat << EOF
+Subtree merge tag '$2' of devicetree-rebasing repo [1] into dts/upstream
+
+[1] https://git.kernel.org/pub/scm/linux/kernel/git/devicetree/devicetree-rebasing.git/
+EOF
+)
+
+remote_add_and_fetch() {
+ if ! git remote get-url devicetree-rebasing 2>/dev/null
+ then
+ echo "Warning: Script automatically adds new git remote via:"
+ echo " git remote add devicetree-rebasing \\"
+ echo " https://git.kernel.org/pub/scm/linux/kernel/git/devicetree/devicetree-rebasing.git"
+ git remote add devicetree-rebasing \
+ https://git.kernel.org/pub/scm/linux/kernel/git/devicetree/devicetree-rebasing.git
+ fi
+ git fetch devicetree-rebasing master
+}
+
+if [ "$1" = "pull" ]
+then
+ remote_add_and_fetch
+ git subtree pull --prefix dts/upstream devicetree-rebasing \
+ "$2" --squash -m "${merge_commit_msg}"
+elif [ "$1" = "pick" ]
+then
+ remote_add_and_fetch
+ git cherry-pick -x --strategy=subtree -Xsubtree=dts/upstream/ "$2"
+else
+ echo "usage: $0 <op> <ref>"
+ echo " <op> pull or pick"
+ echo " <ref> release tag [pull] or commit id [pick]"
+fi
dts/update-dts-subtree.sh is just a wrapper around git subtree commands. Usage from the top level U-Boot source tree, run: $ ./dts/update-dts-subtree.sh pull <release-tag> $ ./dts/update-dts-subtree.sh pick <commit-id> Signed-off-by: Sumit Garg <sumit.garg@linaro.org> --- Changes in v6: - Incorporate shell script comments from Marek. Changes in v5: - Added support to cherry-pick fixes in subtree update script. Also, used https:// instead of git://. Changes in v4: - New patch to add script dts/update-dts-subtree.sh as per Rob's comments. dts/update-dts-subtree.sh | 48 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 48 insertions(+) create mode 100755 dts/update-dts-subtree.sh