linux-kernel - Re: "memory" binding issues

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Message-ID: <5238C4D1.6060500@gmail.com>
Date:	Tue, 17 Sep 2013 14:08:33 -0700
From:	Frank Rowand <frowand.list@...il.com>
To:	Olof Johansson <olof@...om.net>
CC:	Tomasz Figa <tomasz.figa@...il.com>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Stephen Warren <swarren@...dotorg.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	Linux Kernel list <linux-kernel@...r.kernel.org>,
	Marek Szyprowski <m.szyprowski@...sung.com>,
	Stephen Warren <swarren@...dia.com>,
	Rob Herring <rob.herring@...xeda.com>,
	Grant Likely <grant.likely@...retlab.ca>
Subject: Re: "memory" binding issues

On 9/17/2013 9:43 AM, Olof Johansson wrote:
> On Tue, Sep 17, 2013 at 09:56:39AM +0200, Tomasz Figa wrote:
>> I'm afraid that I must disagree. For consistency I'd rather go with what 
>> Ben said. Please see ePAPR chapter 2.2.1.1, which clearly defines how 
>> nodes should be named.
> 
> 2.2.1.1 is there to point out that unit address _has_ to reflect reg.
> 
> 2.2.3 says that unit addresses can be omitted.

2.2.3 is talking about path names.

2.2.1.1 is talking about node names.

2.2.1.1 _does_ require the unit address in the node name, 2.2.3 does not
remove that requirement.

-Frank

> 
>> Having unit-address whenever the node has a reg property has the nice 
>> property of eliminating the need to rename any nodes when adding new one. 
>> (Consider the case that you have one subnode somewhere and you omit the 
>> unit-address and then you find out that you have to add another subnode 
>> with the same name, but another reg value.)
> 
> This motivation doesn't bother me at all -- it should be relatively rare.
> 
> 
> -Olof
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