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From: B.R. Oake <broake@openmailbox.org>
To: u-boot@lists.denx.de
Subject: [U-Boot] u-boot on raspberry pi with fw_printenv/fw_setenv
Date: Tue, 06 Jan 2015 17:01:14 +0000	[thread overview]
Message-ID: <54AC14DA.3000006@openmailbox.org> (raw)
In-Reply-To: <20150106120848.GH5040@waldemar-brodkorb.de>

On 06/01/15 12:08, Waldemar Brodkorb wrote:
> I am looking for a way to change u-boot environment from Linux
> on a Raspberry PI. I have fw_printenv/fw_setenv, but I have no clue
> how the config file looks like, when using uboot.env as a file on
> the first vfat partition. I am not sure, but it looks like there
> is no code to use fw_printenv/fw_setenv with files.

Hi Waldemar,

fw_printenv and fw_setenv can act on an ordinary file instead of a
device if you want; their config file is normally /etc/fw_env.config .
So for example, first you could create an empty 16K file uboot.env:

dd if=/dev/zero of=uboot.env bs=1K count=16

then you could configure fw_printenv and fw_setenv to act upon that
file by putting the following line in /etc/fw_env.config:

uboot.env 0x0000 0x4000 0x4000

I hope that helps,
B.R.

  reply	other threads:[~2015-01-06 17:01 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-01-06 12:08 [U-Boot] u-boot on raspberry pi with fw_printenv/fw_setenv Waldemar Brodkorb
2015-01-06 17:01 ` B.R. Oake [this message]
2015-01-07 17:12   ` B.R. Oake
     [not found] ` <54AC14A6.2090102@openmailbox.org>
2015-01-07 12:17   ` Waldemar Brodkorb
2015-01-07 16:52     ` B.R. Oake

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