Re: [PATCH 2/2] Switched SAMA5D4EK development board to the newer environment method.

[Sascha Hauer <s.hauer@pengutronix.de>]

On Wed, Feb 11, 2015 at 03:26:46PM +0800, Bo Shen wrote:
> Hi J,
> 
> On 02/11/2015 01:06 PM, Jean-Christophe PLAGNIOL-VILLARD wrote:
> >Hi,
> >
> >	as state before I use the atmel board for bootp everyday as the defaultenv-2 does not support
> >	this Nack until it’s fixed
> 
> Do you mean the defaultenv-2 doesn't support the bootp feature or do
> you mean let Doug to keep the default boot from net?
> 
> >	I did send patch for this in the past but they did not hit the mainline
> 
> Can you point us this? Thanks.

He meant this patch:

http://lists.infradead.org/pipermail/barebox/2012-September/thread.html#9304

Reading this discussion again I still have mostly the same opinion:
an /env/boot/* script should be simple, it should be adjustable.

We should resolve this now.

So Jean-Christophe, What you want is to boot your board with
informations provided by the dhcp server. Looking again at your patch
back then the following should do it:

/env/boot/bootp:

| #!/bin/sh
| 
| path="/mnt/tftp"
| 
| ifup eth0
| 
| # Set variables based on information provided by the dhcp request
| nfsroot="${global.dhcp.rootpath}"
| global.bootm.image="${path}/${global.dhcp.bootfile}"
| global.bootm.oftree="${path}/${global.dhcp.oftree_file}"
| 
| bootargs-ip
| global.linux.bootargs.dyn.root="root=/dev/nfs nfsroot=$nfsroot,v3,tcp"

Since you reject changes to the default boot source for this board your
other issue seems to be that you want your board to execute this bootscript
without further adjusting the environment. This is something we cannot do.
The default bootsource can only ever fit your personal or someone elses
use. We cannot make everyone happy with the default boot source, so I
suggest you either control your board via some expect script (which
sucks, I know) or you just save your adjusted environment on your test
board.

Sascha

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