scripts/dtc: Add a script to update to mainline dtc source

#!/bin/sh

# Simple script to update the version of DTC carried by the Linux kernel

#

# This script assumes that the dtc and the linux git trees are in the

# same directory. After building dtc in the dtc directory, it copies the

# source files and generated source files into the scripts/dtc directory

# in the kernel and creates a git commit updating them to the new

# version.

#

# Usage: from the top level Linux source tree, run:

# $ ./scripts/dtc/update-dtc-source.sh

#

# The script will change into the dtc tree, build and test dtc, copy the

# relevant files into the kernel tree and create a git commit. The commit

# message will need to be modified to reflect the version of DTC being

# imported

#

# TODO:

# This script is pretty basic, but it is seldom used so a few manual tasks

# aren't a big deal. If anyone is interested in making it more robust, the

# the following would be nice:

# * Actually fail to complete if any testcase fails.

#   - The dtc "make check" target needs to return a failure

# * Extract the version number from the dtc repo for the commit message

# * Build dtc in the kernel tree

# * run 'make check" on dtc built from the kernel tree

set -ev

DTC_UPSTREAM_PATH=`pwd`/../dtc

DTC_LINUX_PATH=`pwd`/scripts/dtc

DTC_SOURCE="checks.c data.c dtc.c dtc.h flattree.c fstree.c livetree.c srcpos.c \

		srcpos.h treesource.c util.c util.h version_gen.h Makefile.dtc \

		dtc-lexer.l dtc-parser.y"

DTC_GENERATED="dtc-lexer.lex.c dtc-parser.tab.c dtc-parser.tab.h"

# Build DTC

cd $DTC_UPSTREAM_PATH

make clean

make check

# Copy the files into the Linux tree

cd $DTC_LINUX_PATH

for f in $DTC_SOURCE; do

	cp ${DTC_UPSTREAM_PATH}/${f} ${f}

	git add ${f}

done

for f in $DTC_GENERATED; do

	cp ${DTC_UPSTREAM_PATH}/$f ${f}_shipped

	git add ${f}_shipped

done

git commit -e -v -m "scripts/dtc: Update to upstream version [CHANGEME]"

#define DTC_VERSION "DTC 1.4.0"

#define DTC_VERSION "DTC 1.4.0-dirty"