linux-kernel - Re: [PATCH 1/2] OLPC: Add support for calling into Open Firmware

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Message-ID: <480CC78D.3000202@zytor.com>
Date:	Mon, 21 Apr 2008 12:57:49 -0400
From:	"H. Peter Anvin" <hpa@...or.com>
To:	David Woodhouse <dwmw2@...radead.org>
CC:	Andres Salomon <dilinger@...ued.net>,
	Mitch Bradley <wmb@...mworks.com>,
	Yinghai Lu <yhlu.kernel@...il.com>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Joseph Fannin <jfannin@...il.com>,
	linux-kernel@...r.kernel.org, jordan.crouse@....com
Subject: Re: [PATCH 1/2] OLPC: Add support for calling into Open Firmware

David Woodhouse wrote:
> 
>> However, until we clean up the promfs stuff, there's no chance of getting
>> an OFW device tree upstream.
> 
> I see no reason why we shouldn't be able to create a 'flattened'
> device-tree during early boot, like the PowerPC kernel does. And use it
> thereafter, having quiesced OpenFirmware. Haven't we already been
> working on unifying this between SPARC and PowerPC kernels?
> 
> I definitely don't think we need to play these tricks to keep
> OpenFirmware resident while the kernel is running. Take a look at your
> second patch -- it's _all_ just lookups in the device-tree, and you're
> inventing a new way to do it instead of using the existing one.
> 

If so, would this apply to OLPC as well?

	-hpa
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