[U-Boot-Users] Using 'ver' env var

[Wolfgang Denk]

In message <1187102431.13869.7.camel at 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

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