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SubjectRe: [RFC PATCH 0/3] Add device tree build information
Hi Alexandre! wrote:
>The goal of this series is to add device tree build information in dtb.
>This information can be dtb build date, where devicetree files come from,
>who built the dtb ... Actually, same kind of information that you can find
>in the Linux banner which is printout during kernel boot. Having the same
>kind of information for device tree is useful for debugging and maintenance.
>To achieve that a new option "-B" (using an argument) is added to dtc.
>The argument is a file containing a string with build information
>(e.g., From Linux 5.5.0-rc1 by alex the Mon Jan 13 18:25:38 CET 2020).
>DTC use it to append dts file with a new string property "Build-info".
>of/fdt.c is modified to printout "Build-info" property during Kernel boot and
>scripts/Makefile.lib is modified to use dtc -B option during kernel make (this
>last part could be improved for sure).
>Alexandre Torgue (3):
> dtc: Add dtb build information option
> of: fdt: print dtb build information
> scripts: Use -B dtc option to generate dtb build information.
> drivers/of/fdt.c | 9 +++++++
> scripts/Makefile.lib | 11 +++++---
> scripts/dtc/dtc.c | 55 +++++++++++++++++++++++++++++++++-----
> scripts/gen_dtb_build_info | 11 ++++++++
> 4 files changed, 76 insertions(+), 10 deletions(-)
> create mode 100755 scripts/gen_dtb_build_info

Looks good to me in testing here:

[ 0.000000] OF: fdt: From Linux 5.5.0-rc6-00031-g95e20af9fb9c-dirty by stemci01 the Wed 15 Jan 14:33:25 GMT 2020.

Tested-By: Steve McIntyre <>

Steve McIntyre
<> | Open source software for ARM SoCs

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