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Date: Tue, 9 Sep 2008 13:33:54 -0400
From: Josh Boyer <jwboyer@linux.vnet.ibm.com>
To: Georg Schardt <schardt@team-ctech.de>
Subject: Re: Device Tree
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On Tue, Sep 09, 2008 at 05:43:12PM +0200, Georg Schardt wrote:
> Hi,
>
> im searching for informations about the flatten device trees. the only  
> thing i know is, that the device tree is a kind of data-structure which  
> the bios or bootloader gives to the operation system.
>
> until now, i boot linux with uboot without a device tree, but newer  
> kernel wants a devicetree, i think ??
> i use a virtex4 board with an integrated powerpc
>
> how can i create the device tree file ?
> how must the linux kernel be configured ?
> is there a good internet page with informations ?

In the kernel, look at Documentation/powerpc/booting-without-of.txt

You could also read the "A Symphony of Flavours: Using the device tree to
describe embedded hardware" paper on page 27 of:

http://www.linuxsymposium.org/2008/ols-2008-Proceedings-V2.pdf

josh