linux-kernel - Re: [PATCH v10 2/3] DMA: Freescale: Add new 8-channel DMA engine device tree nodes

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Date:	Thu, 26 Sep 2013 13:06:25 +0800
From:	Hongbo Zhang <hongbo.zhang@...escale.com>
To:	David Gibson <david@...son.dropbear.id.au>
CC:	Scott Wood <scottwood@...escale.com>,
	Stephen Warren <swarren@...dotorg.org>, <mark.rutland@....com>,
	<devicetree@...r.kernel.org>, <ian.campbell@...rix.com>,
	<pawel.moll@....com>, <vinod.koul@...el.com>,
	<linux-kernel@...r.kernel.org>, <rob.herring@...xeda.com>,
	<djbw@...com>, <linuxppc-dev@...ts.ozlabs.org>
Subject: Re: [PATCH v10 2/3] DMA: Freescale: Add new 8-channel DMA engine
 device tree nodes

On 09/26/2013 10:28 AM, David Gibson wrote:
> On Wed, Sep 25, 2013 at 08:46:32PM -0500, Scott Wood wrote:
>> On Wed, 2013-09-25 at 15:35 +0800, Hongbo Zhang wrote:
>>> By the way, I know maybe it is difficult, but why not introduce a
>>> document of maintaining rules for the dt binding docs? we have dedicated
>>> maintainers for this part now. Description language from one submitter
>>> cannot satisfy every reviewer/maintainer, for a reg property, is it
>>> necessary to say "offset and length",
>> Don't say "offset and length".  It's both redundant with the base
>> definition of the reg property, and overly specific because it makes
>> assumptions about how the parent node's ranges are set up (sometimes we
>> want to be that specific, but usually not).

Thanks for your answer Scott.
In fact my questions are mainly sample questions to file the necessary 
rules of dt binding.
> To look at it another way, the format of the 'reg' property is defined
> by the parent bus's binding, not the binding of the node itself.
>
Whatever the rule is, if it is reasonable and accepted, just as I said, 
we need to file it.


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