Re: [RFC PATCH 1/3] dtc: Add dtb build information option

Alexandre Torgue
2020-01-22T18:00:55Z

Hi

On 1/20/20 7:17 PM, Steve McIntyre wrote:
> On Fri, Jan 17, 2020 at 08:43:23AM -0600, Rob Herring wrote:
>> On Fri, Jan 17, 2020 at 6:26 AM David Gibson
>> <david@gibson.dropbear.id.au> wrote:
>
> ...
>
>>> What might be better would be to have a dtc option which force appends
>>> an extra .dts to the mail .dts compiled. You can then put an overlay
>>> template in that file, something like:
>>>
>>> &{/} {
>>> linux,build-info = /incbin/ "build-info.txt;
>>> }
>>
>> I like this suggestion either as an include another dts file or an
>> overlay. The latter could be useful as a way to maintain current dtb
>> files while splitting the source files into base and overlay dts
>> files.
>
> ACK, that sounds like it could be helpful.
>
>> But no, let's not prepend this with 'linux'. It's not a property
>> specific for Linux to consume.
>
> Right. We might be seeing the data coming through from U-Boot (or any
> other random bootloader) too.
>
> Cheers,
>

Thanks for reviews. I gonna prepare a V2 with David proposition (to use
overlay format) by keeping in mind not to modify existing dts(i) files.

Remaining questions are:

1- "build-info" or "linux,build-info"? IMO, If information is "generic"
then first one should be used.

2- Looking at Franck proposition[1] some years ago and objections on it,
do you think that this one could accepted ?

regards
Alex

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