linux-kernel - Re: [RFC PATCH 0/3] Add device tree build information

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Message-Id: <E1irl1W-00082F-CF@mail.einval.com>
Date:   Wed, 15 Jan 2020 15:56:02 +0000
From:   Steve McIntyre <steve.mcintyre@...aro.org>
To:     alexandre.torgue@...com
Cc:     <devicetree@...r.kernel.org>, linux-kernel@...r.kernel.org,
        linux-kbuild@...r.kernel.org, devicetree-compiler@...r.kernel.org
Subject: Re: [RFC PATCH 0/3] Add device tree build information

Hi Alexandre!

alexandre.torgue@...com 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).
>
>Regards
>Alex
>
>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@...aro.org>

-- 
Steve McIntyre                                steve.mcintyre@...aro.org
<http://www.linaro.org/> Linaro.org | Open source software for ARM SoCs