1#!/bin/sh
2# Simple script to update the version of DTC carried by the Linux kernel
3#
4# This script assumes that the dtc and the linux git trees are in the
5# same directory. After building dtc in the dtc directory, it copies the
6# source files and generated source files into the scripts/dtc directory
7# in the kernel and creates a git commit updating them to the new
8# version.
9#
10# Usage: from the top level Linux source tree, run:
11# $ ./scripts/dtc/update-dtc-source.sh
12#
13# The script will change into the dtc tree, build and test dtc, copy the
14# relevant files into the kernel tree and create a git commit. The commit
15# message will need to be modified to reflect the version of DTC being
16# imported
17#
18# TODO:
19# This script is pretty basic, but it is seldom used so a few manual tasks
20# aren't a big deal. If anyone is interested in making it more robust, the
21# the following would be nice:
22# * Actually fail to complete if any testcase fails.
23#   - The dtc "make check" target needs to return a failure
24# * Extract the version number from the dtc repo for the commit message
25# * Build dtc in the kernel tree
26# * run 'make check" on dtc built from the kernel tree
27
28set -ev
29
30DTC_UPSTREAM_PATH=`pwd`/../dtc
31DTC_LINUX_PATH=`pwd`/scripts/dtc
32
33DTC_SOURCE="checks.c data.c dtc.c dtc.h flattree.c fstree.c livetree.c srcpos.c \
34		srcpos.h treesource.c util.c util.h version_gen.h Makefile.dtc \
35		dtc-lexer.l dtc-parser.y"
36DTC_GENERATED="dtc-lexer.lex.c dtc-parser.tab.c dtc-parser.tab.h"
37LIBFDT_SOURCE="Makefile.libfdt fdt.c fdt.h fdt_empty_tree.c fdt_ro.c fdt_rw.c fdt_strerror.c fdt_sw.c fdt_wip.c libfdt.h libfdt_env.h libfdt_internal.h"
38
39get_last_dtc_version() {
40	git log --oneline scripts/dtc/ | grep 'upstream' | head -1 | sed -e 's/^.* \(.*\)/\1/'
41}
42
43last_dtc_ver=$(get_last_dtc_version)
44
45# Build DTC
46cd $DTC_UPSTREAM_PATH
47make clean
48make check
49dtc_version=$(git describe HEAD)
50dtc_log=$(git log --oneline ${last_dtc_ver}..)
51
52
53# Copy the files into the Linux tree
54cd $DTC_LINUX_PATH
55for f in $DTC_SOURCE; do
56	cp ${DTC_UPSTREAM_PATH}/${f} ${f}
57	git add ${f}
58done
59for f in $DTC_GENERATED; do
60	cp ${DTC_UPSTREAM_PATH}/$f ${f}_shipped
61	git add ${f}_shipped
62done
63for f in $LIBFDT_SOURCE; do
64       cp ${DTC_UPSTREAM_PATH}/libfdt/${f} libfdt/${f}
65       git add libfdt/${f}
66done
67
68sed -i -- 's/#include <libfdt_env.h>/#include "libfdt_env.h"/g' ./libfdt/libfdt.h
69sed -i -- 's/#include <fdt.h>/#include "fdt.h"/g' ./libfdt/libfdt.h
70git add ./libfdt/libfdt.h
71
72commit_msg=$(cat << EOF
73scripts/dtc: Update to upstream version ${dtc_version}
74
75This adds the following commits from upstream:
76
77${dtc_log}
78EOF
79)
80
81git commit -e -v -s -m "${commit_msg}"
82