From mboxrd@z Thu Jan  1 00:00:00 1970
From: Stephen Warren <swarren-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org>
Subject: Re: [PATCH v2 07/10] ARM: tegra: pcie: Add device tree support
Date: Wed, 20 Jun 2012 11:47:39 -0600
Message-ID: <4FE20CBB.7040500@wwwdotorg.org>
References: <4FD84133.4060401@firmworks.com> <20120613075232.GA6139@avionic-0098.mockup.avionic-design.de> <4FD849CF.4030009@firmworks.com> <20120613081910.GB6528@avionic-0098.mockup.avionic-design.de> <4FD85127.8050301@firmworks.com> <20120614091905.GA9081@avionic-0098.mockup.avionic-design.de> <4FDA2DDA.1030704@wwwdotorg.org> <20120614192903.GA2212@avionic-0098.mockup.avionic-design.de> <4FDA40A0.4030206@wwwdotorg.org> <20120615061236.GA4081@avionic-0098.mockup.avionic-design.de> <20120619133001.GB24138@avionic-0098.mockup.avionic-design.de> <4FE0EFBB.6090206@firmworks.com> <4FE1FB28.3080901@wwwdotorg.org> <4FE20B34.2090305@firmworks.com>
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Cc: Thierry Reding <thierry.reding-RM9K5IK7kjKj5M59NBduVrNAH6kLmebB@public.gmane.org>, Russell King <linux-lFZ/pmaqli7XmaaqVzeoHQ@public.gmane.org>, linux-pci-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, devicetree-discuss-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org, Rob Herring <rob.herring-bsGFqQB8/DxBDgjK7y7TUQ@public.gmane.org>, Jesse Barnes <jbarnes-Y1mF5jBUw70BENJcbMCuUQ@public.gmane.org>, Colin Cross <ccross-z5hGa2qSFaRBDgjK7y7TUQ@public.gmane.org>, linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, Arnd Bergmann <arnd-r2nGTMty4D4@public.gmane.org>
List-Id: devicetree@vger.kernel.org

On 06/20/2012 11:41 AM, Mitch Bradley wrote:
> On 6/20/2012 6:32 AM, Stephen Warren wrote:
>> On 06/19/2012 03:31 PM, Mitch Bradley wrote:
>> ...
>>
>>
>> The third cell "offset" is necessary so that the size field has a number
>> space that can include it.
>>
>> Can you expand on that sentence a bit more; I don't quite understand
>> that aspect. Thanks.
> 
> The meaning of "size"(in the context of "reg" which is phys,size) is
> "the device occupies a
> contiguous sequence of addresses beginning at phys and continuing to
> phys+size-1". The
> implicit addition occurs on the last #size-cells cells of the phys.

Ah right of course - that makes perfect sense. Thanks.