From: Alexandre Torgue <alexandre.torgue@st.com>
To: <robh+dt@kernel.org>, Frank Rowand <frowand.list@gmail.com>,
Masahiro Yamada <masahiroy@kernel.org>,
Michal Marek <michal.lkml@markovi.net>,
<david@gibson.dropbear.id.au>, <sjg@chromium.org>
Cc: <devicetree@vger.kernel.org>,
Alexandre Torgue <alexandre.torgue@st.com>,
<linux-kernel@vger.kernel.org>, <linux-kbuild@vger.kernel.org>,
<devicetree-compiler@vger.kernel.org>
Subject: [RFC PATCH 3/3] scripts: Use -B dtc option to generate dtb build information.
Date: Mon, 13 Jan 2020 19:16:25 +0100 [thread overview]
Message-ID: <20200113181625.3130-4-alexandre.torgue@st.com> (raw)
In-Reply-To: <20200113181625.3130-1-alexandre.torgue@st.com>
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 <alexandre.torgue@st.com>
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
next prev parent reply other threads:[~2020-01-13 18:16 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-13 18:16 [RFC PATCH 0/3] Add device tree build information Alexandre Torgue
2020-01-13 18:16 ` [RFC PATCH 1/3] dtc: Add dtb build information option Alexandre Torgue
2020-01-16 0:57 ` David Gibson
2020-01-16 8:58 ` Alexandre Torgue
2020-01-17 9:09 ` David Gibson
2020-01-17 14:43 ` Rob Herring
2020-01-17 15:11 ` Alexandre Torgue
2020-01-19 6:40 ` David Gibson
2020-01-19 6:39 ` David Gibson
2020-01-21 15:59 ` Rob Herring
2020-01-21 17:18 ` Steve McIntyre
2020-01-23 5:13 ` David Gibson
2020-01-23 14:05 ` Rob Herring
2020-01-20 18:17 ` Steve McIntyre
2020-01-22 18:00 ` Alexandre Torgue
2020-01-22 19:54 ` Frank Rowand
2020-01-13 18:16 ` [RFC PATCH 2/3] of: fdt: print dtb build information Alexandre Torgue
2020-01-13 18:16 ` Alexandre Torgue [this message]
2020-01-17 19:20 ` [RFC PATCH 3/3] scripts: Use -B dtc option to generate " Frank Rowand
2020-01-22 19:54 ` Frank Rowand
2020-01-20 16:16 ` Frank Rowand
2020-01-15 15:56 ` [RFC PATCH 0/3] Add device tree " Steve McIntyre
2020-01-16 2:28 ` Frank Rowand
2020-01-16 8:19 ` Alexandre Torgue
2020-01-17 19:13 ` Frank Rowand
2020-01-20 10:56 ` Alexandre Torgue
2020-01-20 16:14 ` Frank Rowand
2020-01-20 18:28 ` Steve McIntyre
2020-01-21 3:20 ` Frank Rowand
2020-01-21 3:39 ` Frank Rowand
2020-01-21 17:10 ` Steve McIntyre
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