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

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Date:   Mon, 20 Jan 2020 18:17:14 +0000
From:   Steve McIntyre <steve.mcintyre@...aro.org>
To:     Rob Herring <robh+dt@...nel.org>
Cc:     David Gibson <david@...son.dropbear.id.au>,
        Alexandre Torgue <alexandre.torgue@...com>,
        Frank Rowand <frowand.list@...il.com>,
        Masahiro Yamada <masahiroy@...nel.org>,
        Michal Marek <michal.lkml@...kovi.net>,
        Simon Glass <sjg@...omium.org>, devicetree@...r.kernel.org,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
        Devicetree Compiler <devicetree-compiler@...r.kernel.org>
Subject: Re: [RFC PATCH 1/3] dtc: Add dtb build information option

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