linux-kernel - Re: commit e38c0a1f breaks powerpc boards with uli1575 chip

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Date:	Mon, 30 Dec 2013 14:13:20 +1100
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	Nikita Yushchenko <nyushchenko@....rtsoft.ru>
Cc:	Rob Herring <robherring2@...il.com>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	Arnd Bergmann <arnd@...db.de>,
	Dmitry Krivoschekov <dkrivoschokov@....rtsoft.ru>,
	Alexey Lugovskoy <lugovskoy@....rtsoft.ru>,
	Thierry Reding <thierry.reding@...onic-design.de>,
	linux-kernel@...r.kernel.org,
	Grant Likely <grant.likely@...aro.org>,
	linuxppc-dev@...ts.ozlabs.org
Subject: Re: commit e38c0a1f breaks powerpc boards with uli1575 chip

On Thu, 2013-12-19 at 08:42 +0400, Nikita Yushchenko wrote:
> No, this does not help.
> 
> I've dumped the actual content of 'range' and 'addr' at the failure
> point 
> (i.e. ar point that returns error with e38c0a1f but passes without 
> e38c0a1f ):
> 
> OF: default map, cp=0, s=10000, da=70
> range:  01 00 00 00 00 00 00 00 00 00 00 00
>  addr:  00 00 00 00 00 00 00 00 00 00 00 70

Something that has a #address-cells larger than 2, or more generally,
an address field that contains more than a single number, must have
a specific translation backend, like we have for PCI.

This is a bit annoying but originates from the original OFW stuff on
which this stuff is based where the bus node would provide the methods
for translation.

Cheers,
Ben.
 

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