linux-kernel - Re: [RESEND PATCH 2/2] ARM: dts: tegra: Use labels for overriding nodes in Tegra114 boards

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Message-ID: <20150520124008.GB24016@ulmo.nvidia.com>
Date:	Wed, 20 May 2015 14:40:09 +0200
From:	Thierry Reding <thierry.reding@...il.com>
To:	Alexandre Courbot <gnurou@...il.com>
Cc:	Krzysztof Kozłowski <k.kozlowski.k@...il.com>,
	Stephen Warren <swarren@...dotorg.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [RESEND PATCH 2/2] ARM: dts: tegra: Use labels for overriding
 nodes in Tegra114 boards

On Wed, May 20, 2015 at 02:05:38PM +0900, Alexandre Courbot wrote:
> On Wed, May 20, 2015 at 2:03 PM, Krzysztof Kozłowski
> <k.kozlowski.k@...il.com> wrote:
> > 2015-05-20 13:05 GMT+09:00 Alexandre Courbot <gnurou@...il.com>:
> >> On Tue, May 19, 2015 at 8:51 PM, Krzysztof Kozlowski
> >> <k.kozlowski.k@...il.com> wrote:
> >>> Usage of labels instead of full paths reduces possible mistakes when
> >>> overriding nodes.
> >>>
> >>> Signed-off-by: Krzysztof Kozlowski <k.kozlowski.k@...il.com>
> >>
> >> Indentation seems to be off by one tab in the added code (hence the
> >> huge size of this patch ; most lines should not change), can you
> >> check?
> >
> > It is correct. This change in indentation is an effect of moving nodes
> > out of first bracket ("\ {"). That is the convention.
> >
> > It us up to you guys if this is worth the effort. For exynos we use
> > label-convention and now I am converting old DTS to it. I think the
> > label-convention is less error-prone when extending or overriding
> > nodes. Also it removes duplicated addresses.
> 
> I don't really have a strong opinion on this - Stephen and Thierry
> have worked with DT much more, let's see what they think...

I agree with Stephen that this is unnecessary churn. I understand the
reason why people prefer to use labels, but I don't think it's enough of
an issue to warrent rewriting all of the DTS files. I personally don't
like the convention very much because it makes the otherwise very neatly
structured DTS files hard to read.

Thierry

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