linux-kernel - Re: [PATCH 5/5] arm: boot: store ATAGs structure into DT "/chosen/linux,atags" entry

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Message-ID: <20151126090739.GD14190@pali>
Date:	Thu, 26 Nov 2015 10:07:39 +0100
From:	Pali Rohár <pali.rohar@...il.com>
To:	Frank Rowand <frowand.list@...il.com>
Cc:	Tony Lindgren <tony@...mide.com>, Arnd Bergmann <arnd@...db.de>,
	Pavel Machek <pavel@....cz>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	Russell King - ARM Linux <linux@....linux.org.uk>,
	Laura Abbott <lauraa@...eaurora.org>,
	Grant Likely <grant.likely@...aro.org>,
	Rob Herring <robherring2@...il.com>,
	Will Deacon <will.deacon@....com>,
	Ivaylo Dimitrov <ivo.g.dimitrov.75@...il.com>,
	Sebastian Reichel <sre@...ian.org>,
	Andreas Färber <afaerber@...e.de>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	linux-omap@...r.kernel.org
Subject: Re: [PATCH 5/5] arm: boot: store ATAGs structure into DT
 "/chosen/linux,atags" entry

On Wednesday 25 November 2015 20:19:21 Frank Rowand wrote:
> > Or populate /proc/atags only for the ones that need it from machine
> > specific init_early?
> 
> This is circling back to the first comment from Russell King where
> he suggested a legacy file for the N900 which calls save_atags():
> 
>     Are the ATAGs at a fixed address on the N900?  Can that be handled in
>     some kind of legacy file for the N900 which calls save_atags() on it, so
>     we don't end up introducing yet more stuff that we have to maintain into
>     the distant future?  If not, what about copying a known working atag
>     structure into a legacy file for the N900?
> 
> It seems to me that patches 1, 2, 4, and 5 could be replaced by this
> approach.

Hi Frank, in this case I will ask my question again: It is possible to
read atags from that legacy file. And if yes how? I was not thinking
about this approach because somebody in past wrote that this is not
possible...

-- 
Pali Rohár
pali.rohar@...il.com
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