linux-kernel - Re: [PATCH v4 6/6] ARM: dts: STiH407: Add B2120 board support

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Message-ID: <CAOesGMigF7CGtTmLMW4zbRemGaMbWs6NV6KLPFZQFYmnHc=HQw@mail.gmail.com>
Date:	Tue, 20 May 2014 15:10:44 -0700
From:	Olof Johansson <olof@...om.net>
To:	Lee Jones <lee.jones@...aro.org>
Cc:	Maxime COQUELIN <maxime.coquelin@...com>,
	Rob Landley <rob@...dley.net>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Russell King <linux@....linux.org.uk>,
	Srinivas Kandagatla <srinivas.kandagatla@...com>,
	Stuart Menefy <stuart.menefy@...com>,
	Linus Walleij <linus.walleij@...aro.org>,
	Giuseppe Cavallaro <peppe.cavallaro@...com>,
	"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"kernel@...inux.com" <kernel@...inux.com>
Subject: Re: [PATCH v4 6/6] ARM: dts: STiH407: Add B2120 board support

On Tue, May 20, 2014 at 12:43 AM, Lee Jones <lee.jones@...aro.org> wrote:
>> >> > +       soc {
>> >> > +               sbc_serial0: serial@...0000 {
>> >> > +                       status = "okay";
>> >> > +               };
>> >>
>> >> You might want to consider reference-based syntax here instead, so you
>> >> don't have to mimic the hierarchy. That'd be (at the root level of the
>> >> file, below this secion:
>> >>
>> >> &sbc_serial0: {
>> >>         status = "okay";
>> >> };
>> >
>> > I'm personally not keen on this scheme.  It's sometimes helpful to know
>> > the hierarchy and I don't think it's a large overhead to format the
>> > subordinate DTS files in this way.
>> >
>> > Please consider not enforcing this.
>>
>> Definitely not enforcing it, and I didn't use to like it either but it
>> has some real upsides.
>>
>> In particular, it saves a lot of grief when you're changing something
>> like the unit-id of a node in .dtsi and forget to do the same update
>> in the dts.
>
> I'm not entirely sure what a unit-id is, but I can see that there
> would be benefits to using the referenced-based syntax as you call
> it.  If any of those benefits hold true here I won't push back, but I
> would personally like to see us default to the hierarchical scheme.

Sorry, I meant unit-address. I.e. the portion that goes behind the @
in the node name.


-Olof
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