linux-kernel - Re: [RESEND] [PATCH v2 1/2] arm: devtree: Set system

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Message-ID: <CAL_Jsq+ysDqxTgfW1JvG5czHa4UkZQDv1BN63iK4jvV9kDXM8w@mail.gmail.com>
Date:	Mon, 6 Jul 2015 10:22:58 -0500
From:	Rob Herring <robherring2@...il.com>
To:	Pali Rohár <pali.rohar@...il.com>
Cc:	Tony Lindgren <tony@...mide.com>, Arnd Bergmann <arnd@...db.de>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	Russell King <linux@....linux.org.uk>,
	Will Deacon <will.deacon@....com>,
	Ivaylo Dimitrov <ivo.g.dimitrov.75@...il.com>,
	Sebastian Reichel <sre@...ian.org>,
	Pavel Machek <pavel@....cz>,
	Andreas Färber <afaerber@...e.de>,
	linux-omap <linux-omap@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>
Subject: Re: [RESEND] [PATCH v2 1/2] arm: devtree: Set system_rev from DT revision

On Mon, Jul 6, 2015 at 8:12 AM, Pali Rohár <pali.rohar@...il.com> wrote:
> On Monday 06 July 2015 14:31:27 Tony Lindgren wrote:
>> * Pali Rohár <pali.rohar@...il.com> [150706 05:25]:
>> > into which file should I put documentation about new DT properties?
>>
>> If it's Linux generic like linux,revision, then how about
>> Documentation/devicetree/bindings/revision.txt?
>>
>> For the ATAGs, Documentation/devicetree/bindings/arm/atag.txt?
>>
>> Regards,
>>
>> Tony
>
> Hm... now I'm thinking into which DT field should I put atags and
> revision. In previous emails you wrote to use "linux,atags", now
> "arm,atags"? And put them into root node? Or other?
>
> In arch/arm/boot/compressed/atags_to_fdt.c code I see that most atag
> properties are converted into "/chosen" node in DT...
>
> So what do you prefer for "revision" and what for "atags"?
>
> Some mentioned examples:
>
> "/revision"

This one. This is a top level h/w property.

> "/chosen/revision"
> "/linux,revision"
> "/chosen/linux,revision"
> ...
>
> "/atags"
> "/chosen/atags"
> "/linux,atags"
> "/chosen/linux,atags"

This one. ATAGs are a Linux data struct.

Rob

> "/arm,atags"
> "/chosen/arm,atags"
> ...
>
> --
> Pali Rohár
> pali.rohar@...il.com
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