linux-kernel - Re: [PATCH 3/4] ARM: tegra: nyan-big: Include compatible revisions for proper detection

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Date:   Tue, 20 Sep 2016 19:53:24 +0200
From:   Paul Kocialkowski <contact@...lk.fr>
To:     Jon Hunter <jonathanh@...dia.com>, linux-kernel@...r.kernel.org
Cc:     devicetree@...r.kernel.org, Stephen Warren <swarren@...dotorg.org>,
        Thierry Reding <thierry.reding@...il.com>,
        linux-tegra@...r.kernel.org, Alexandre Courbot <gnurou@...il.com>,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 3/4] ARM: tegra: nyan-big: Include compatible revisions
 for proper detection

Le mardi 20 septembre 2016 à 18:41 +0100, Jon Hunter a écrit :
> On 28/08/16 18:32, Paul Kocialkowski wrote:
> > 
> > Depthcharge (the payload used with cros devices) will attempt to detect
> > boards using their revision. This includes all the known revisions for
> > the nyan-big board so that the dtb can be selected preferably.
> 
> May be I am missing something here, but for the mainline there is only
> one dtb available and so why is this needed for the mainline?

There is indeed a single dts in mainline, but depthcharge will use the revision
to match the compatible string (e.g. it will look for google,nyan-big-rev5, not
google,nyan-big), so we need to list them all in that single dts. Otherwise,
depthcharge will fall back to the default config, which may or may not be
suitable for nyan.

-- 
Paul Kocialkowski, developer of low-level free software for embedded devices

Website: https://www.paulk.fr/
Coding blog: https://code.paulk.fr/
Git repositories: https://git.paulk.fr/ https://git.code.paulk.fr/
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