From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx07-00178001.pphosted.com ([62.209.51.94]:36658 "EHLO mx07-00178001.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728923AbgAMSQy (ORCPT ); Mon, 13 Jan 2020 13:16:54 -0500 From: Alexandre Torgue Subject: [RFC PATCH 3/3] scripts: Use -B dtc option to generate dtb build information. Date: Mon, 13 Jan 2020 19:16:25 +0100 Message-ID: <20200113181625.3130-4-alexandre.torgue@st.com> In-Reply-To: <20200113181625.3130-1-alexandre.torgue@st.com> References: <20200113181625.3130-1-alexandre.torgue@st.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kbuild-owner@vger.kernel.org List-ID: To: robh+dt@kernel.org, Frank Rowand , Masahiro Yamada , Michal Marek , david@gibson.dropbear.id.au, sjg@chromium.org Cc: devicetree@vger.kernel.org, Alexandre Torgue , linux-kernel@vger.kernel.org, linux-kbuild@vger.kernel.org, devicetree-compiler@vger.kernel.org This commit adds a new script to create a string in tmp file with some information (date, linux version, user). This file is then used by dtc with -B option to append dts file with a new property. During kernel boot it will then be possible to printout DTB build information (date, linux version used, user). Signed-off-by: Alexandre Torgue diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib index 3fa32f83b2d7..6a98eac1e56d 100644 --- a/scripts/Makefile.lib +++ b/scripts/Makefile.lib @@ -235,6 +235,7 @@ quiet_cmd_gzip = GZIP $@ # DTC # --------------------------------------------------------------------------- DTC ?= $(objtree)/scripts/dtc/dtc +DTB_GEN_INFO ?= $(objtree)/scripts/gen_dtb_build_info # Disable noisy checks by default ifeq ($(findstring 1,$(KBUILD_EXTRA_WARN)),) @@ -275,11 +276,13 @@ $(obj)/%.dtb.S: $(obj)/%.dtb FORCE quiet_cmd_dtc = DTC $@ cmd_dtc = mkdir -p $(dir ${dtc-tmp}) ; \ - $(HOSTCC) -E $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) $< ; \ - $(DTC) -O $(2) -o $@ -b 0 \ + $(DTB_GEN_INFO) $(@).info ;\ + $(HOSTCC) -E $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) $< ; \ + $(DTC) -O $(2) -o $@ -b 0 -B $(@).info\ $(addprefix -i,$(dir $<) $(DTC_INCLUDE)) $(DTC_FLAGS) \ - -d $(depfile).dtc.tmp $(dtc-tmp) ; \ - cat $(depfile).pre.tmp $(depfile).dtc.tmp > $(depfile) + -d $(depfile).dtc.tmp $(dtc-tmp) ; \ + rm $(@).info ; \ + cat $(depfile).pre.tmp $(depfile).dtc.tmp > $(depfile) $(obj)/%.dtb: $(src)/%.dts $(DTC) FORCE $(call if_changed_dep,dtc,dtb) diff --git a/scripts/gen_dtb_build_info b/scripts/gen_dtb_build_info new file mode 100755 index 000000000000..30cf7506b9d5 --- /dev/null +++ b/scripts/gen_dtb_build_info @@ -0,0 +1,11 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL-2.0 + +DTB_TARGET=$@ +COMPILE_BY=$(whoami | sed 's/\\/\\\\/') + +touch $DTB_TARGET + +{ + echo From Linux $KERNELRELEASE by $COMPILE_BY the $(date). +} > $DTB_TARGET -- 2.17.1