1#!/bin/sh
2# SPDX-License-Identifier: GPL-2.0
3# Simple script to update the version of DTC carried by the Linux kernel
4#
5# This script assumes that the dtc and the linux git trees are in the
6# same directory. After building dtc in the dtc directory, it copies the
7# source files and generated source file(s) into the scripts/dtc directory
8# in the kernel and creates a git commit updating them to the new
9# version.
10#
11# Usage: from the top level Linux source tree, run:
12# $ ./scripts/dtc/update-dtc-source.sh
13#
14# The script will change into the dtc tree, build and test dtc, copy the
15# relevant files into the kernel tree and create a git commit. The commit
16# message will need to be modified to reflect the version of DTC being
17# imported
18#
19# TODO:
20# This script is pretty basic, but it is seldom used so a few manual tasks
21# aren't a big deal. If anyone is interested in making it more robust, the
22# the following would be nice:
23# * Actually fail to complete if any testcase fails.
24#   - The dtc "make check" target needs to return a failure
25# * Extract the version number from the dtc repo for the commit message
26# * Build dtc in the kernel tree
27# * run 'make check" on dtc built from the kernel tree
28
29set -ev
30
31DTC_UPSTREAM_PATH=`pwd`/../dtc
32DTC_LINUX_PATH=`pwd`/scripts/dtc
33
34DTC_SOURCE="checks.c data.c dtc.c dtc.h flattree.c fstree.c livetree.c srcpos.c \
35		srcpos.h treesource.c util.c util.h version_gen.h yamltree.c \
36		dtc-lexer.l dtc-parser.y"
37LIBFDT_SOURCE="fdt.c fdt.h fdt_addresses.c fdt_empty_tree.c \
38		fdt_overlay.c fdt_ro.c fdt_rw.c fdt_strerror.c fdt_sw.c \
39		fdt_wip.c libfdt.h libfdt_env.h libfdt_internal.h"
40FDTOVERLAY_SOURCE=fdtoverlay.c
41
42get_last_dtc_version() {
43	git log --oneline scripts/dtc/ | grep 'upstream' | head -1 | sed -e 's/^.* \(.*\)/\1/'
44}
45
46last_dtc_ver=$(get_last_dtc_version)
47
48# Build DTC
49cd $DTC_UPSTREAM_PATH
50make clean
51make check
52dtc_version=$(git describe HEAD)
53dtc_log=$(git log --oneline ${last_dtc_ver}..)
54
55
56# Copy the files into the Linux tree
57cd $DTC_LINUX_PATH
58for f in $DTC_SOURCE $FDTOVERLAY_SOURCE; do
59	cp ${DTC_UPSTREAM_PATH}/${f} ${f}
60	git add ${f}
61done
62for f in $LIBFDT_SOURCE; do
63       cp ${DTC_UPSTREAM_PATH}/libfdt/${f} libfdt/${f}
64       git add libfdt/${f}
65done
66
67sed -i -- 's/#include <libfdt_env.h>/#include "libfdt_env.h"/g' ./libfdt/libfdt.h
68sed -i -- 's/#include <fdt.h>/#include "fdt.h"/g' ./libfdt/libfdt.h
69git add ./libfdt/libfdt.h
70
71commit_msg=$(cat << EOF
72scripts/dtc: Update to upstream version ${dtc_version}
73
74This adds the following commits from upstream:
75
76${dtc_log}
77EOF
78)
79
80git commit -e -v -s -m "${commit_msg}"
81