Re: [RFC PATCH v2 1/4] scripts: Add script to generate dtb build information

Rob Herring
2020-02-21T19:38:49Z

On Fri, Feb 21, 2020 at 11:52 AM Frank Rowand <frowand.list@gmail.com> wrote:
>
> On 2/21/20 10:14 AM, Alexandre Torgue wrote:
> > This commit adds a new script to create a file (in dts file directory) with
> > some information (date, Linux version, user). This file could then be used
> > to populate "build-info" property in every dts file that would use this
> > build information:
> >
> > Example:
> >
> > / {
> > ...
> > build-info = /incbin/("dtb-build.txt");
>
> s/.txt/.dtsi/
>
> and same wherever the file name is used.
>
>
> > ...
> > };
> >
> > Signed-off-by: Alexandre Torgue <alexandre.torgue@st.com>
> >
> > diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
> > index bae62549e3d2..a5af84ef4ffc 100644
> > --- a/scripts/Makefile.lib
> > +++ b/scripts/Makefile.lib
> > @@ -246,6 +246,7 @@ quiet_cmd_gzip = GZIP $@
> > # DTC
> > # ---------------------------------------------------------------------------
> > DTC ?= $(objtree)/scripts/dtc/dtc
> > +DTB_GEN_INFO ?= $(objtree)/scripts/gen_dtb_build_info.sh
> >
> > # Disable noisy checks by default
> > ifeq ($(findstring 1,$(KBUILD_EXTRA_WARN)),)
> > @@ -286,6 +287,7 @@ $(obj)/%.dtb.S: $(obj)/%.dtb FORCE
> >
> > quiet_cmd_dtc = DTC $@
> > cmd_dtc = mkdir -p $(dir ${dtc-tmp}) ; \
> > + $(DTB_GEN_INFO) $(src) ; \
> > $(HOSTCC) -E $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) $< ; \
> > $(DTC) -O $(2) -o $@ -b 0 \
> > $(addprefix -i,$(dir $<) $(DTC_INCLUDE)) $(DTC_FLAGS) \
> > diff --git a/scripts/gen_dtb_build_info.sh b/scripts/gen_dtb_build_info.sh
> > new file mode 100755
> > index 000000000000..0cd8bd98e410
> > --- /dev/null
> > +++ b/scripts/gen_dtb_build_info.sh
> > @@ -0,0 +1,10 @@
> > +#!/bin/bash
> > +# SPDX-License-Identifier: GPL-2.0
> > +
> > +set -o nounset
> > +
> > +DTB_DIR=$1
> > +DTB_COMPILE_BY=$(whoami | sed 's/\\/\\\\/')
> > +DTB_INFO="From Linux $KERNELRELEASE by $DTB_COMPILE_BY the $(date).\0"
>
> I would remove the filler words "From", "by", "the", and the trailing
> period ('.').
>
> <bikeshed>
> You might consider using a format more like the Linux
> kernel version line, which puts parenthesis around the
> compiled by info.

IMO, we should use exactly the Linux kernel version line. Or exactly
the u-boot version line when built in u-boot.

Rob