linux-kernel - Re: [PATCH 2/4 V2] dt-bindings: Add root properties for Raspberry Pi

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Date:	Mon, 19 Jan 2015 20:01:20 +0100 (CET)
From:	Stefan Wahren <stefan.wahren@...e.com>
To:	Stephen Warren <swarren@...dotorg.org>
Cc:	linux-kernel@...r.kernel.org, linux-rpi-kernel@...ts.infradead.org,
	devicetree@...r.kernel.org, lee@...nel.org, pawel.moll@....com,
	linux@....linux.org.uk, robh+dt@...nel.org,
	ijc+devicetree@...lion.org.uk, galak@...eaurora.org,
	mark.rutland@....com
Subject: Re: [PATCH 2/4 V2] dt-bindings: Add root properties for Raspberry
 Pi

Hi Stephen,

> Stephen Warren <swarren@...dotorg.org> hat am 19. Januar 2015 um 18:13
> geschrieben:
>
>
> On 01/19/2015 04:00 AM, Stefan Wahren wrote:
> > This patch adds root compatible properties for the following boards:
> > - Raspberry Pi Model A
> > - Raspberry Pi Model A+
> > - Raspberry Pi Model B
> > - Raspberry Pi Model B (no P5)
> > - Raspberry Pi Model B rev2
> > - Raspberry Pi Model B+
> > - Raspberry Pi Compute Module
>
> Acked-by: Stephen Warren <swarren@...dotorg.org>
>
> This seems sane to me. One thing I should have asked: What compatible
> values does the RPi Foundation's downstream for all these cases?

good point. Unfortunately my patches to linux-rpi-kernel are held back because
of too many recipients, so it's possible that someone complain later.

I have looked at chapter 3.1 in [1], but didn't find the any other variants than
B and B+:

  Here, the presence or absence of the "-plus" is the significant thing, not the
"b" -- Model A's and A+'s will 
  use the "b" and "b-plus" variants, respectively.

Also in the newest branch [2]:

bcm2835-rpi-b.dts      -> model = Raspberry Pi Model B
bcm2708-rpi-b.dts      -> model = Raspberry Pi Model B
bcm2708-rpi-b-plus.dts -> model = Raspberry Pi Model B+

Sorry, i don't have any experience with the downstream kernel. So please correct
me if looked at the wrong places.

[1] -
https://github.com/raspberrypi/documentation/blob/master/configuration/device-tree.md
[2] - https://github.com/raspberrypi/linux/tree/rpi-3.18.y/

> Aligning with that would be nice if possible.

Stefan
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