linux-kernel - Re: [PATCH 1/2] dt-bindings: arm: sunxi: add OrangePi 3 with eMMC

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Message-ID: <4200557.LvFx2qVVIh@jernej-laptop>
Date:   Thu, 16 Jan 2020 00:10:58 +0100
From:   Jernej Škrabec <jernej.skrabec@...l.net>
To:     Rob Herring <robh+dt@...nel.org>
Cc:     Maxime Ripard <mripard@...nel.org>, Chen-Yu Tsai <wens@...e.org>,
        Mark Rutland <mark.rutland@....com>,
        "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" 
        <linux-arm-kernel@...ts.infradead.org>, devicetree@...r.kernel.org,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] dt-bindings: arm: sunxi: add OrangePi 3 with eMMC

Hi!

Dne sreda, 15. januar 2020 ob 22:57:31 CET je Rob Herring napisal(a):
> On Wed, Jan 15, 2020 at 1:42 PM Jernej Skrabec <jernej.skrabec@...l.net> 
wrote:
> > OrangePi 3 can optionally have eMMC. Add a compatible for it.
> 
> Is this just a population option or a different board layout? If the
> former, I don't think you need a new compatible, just add/enable a
> node for the eMMC.

I have only board with eMMC but I imagine it's the former. Even so, current 
approach with Allwinner boards is to have two different board DT files, one for 
each variant. This can be seen from Documentation/devicetree/bindings/arm/
sunxi.yaml which has a lot of compatibles ending with "-emmc". I guess reason 
for that is to avoid having MMC controller being powered on for no reason.

Best regards,
Jernej