From mboxrd@z Thu Jan  1 00:00:00 1970
From: Wolfgang Denk <wd@denx.de>
Date: Tue, 14 Aug 2007 17:23:43 +0200
Subject: [U-Boot-Users] Using 'ver' env var
In-Reply-To: Your message of "Tue, 14 Aug 2007 16:40:31 +0200."
	<1187102431.13869.7.camel@elrond.sweden.atmel.com>
Message-ID: <20070814152343.3CE3F24041@gemini.denx.de>
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In message <1187102431.13869.7.camel@elrond.sweden.atmel.com> you wrote:
>
> Ideally this should be in a script "reboot_cmd" which
> gets executed at every reboot before anything else
> is executed.

I really don't understand why you make all this so complicated.

I think we agree that all that needs to be done is running a single
"saveenv" command once after installation of a new U-Boot image (which
is supposed to never to happen in the field anyway).

So deine yoiur "bootcmd" to include something like a "run once"
command, and define "once" as a "harmless" operation, like this:

	=> setenv once version

Then, when you update U-Boot (under Linux), also change the definition
of "once", equivalent to this:

	=> setenv once "saveenv;setenv once version"

The next time U-Boot boots it will run this variable, will  save  the
environment  and  then  reset  the  variable  to  the effective no-op
command.

Voila...

Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
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