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

Frank Rowand
2020-01-16T02:28:12Z

On 1/13/20 12:16 PM, Alexandre Torgue wrote:
> Hi,
>
> 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).

Please read through the thread at:

https://lore.kernel.org/linux-arm-kernel/550A42AC.8060104@gmail.com/

which was my attempt to do something similar.

-Frank

>
> 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
>