set root variable for uImage?

From: Adam Furmanczuk <afurmanczuk@knowtrek.com>
To: barebox@lists.infradead.org
Subject: set root variable for uImage?
Date: Wed, 03 Jul 2013 15:32:20 +0200	[thread overview]
Message-ID: <51D427E4.5060208@knowtrek.com> (raw)
In-Reply-To: <51B0B2D6.3030407@knowtrek.com>

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Hi,

I restate this question from my previous thread "how to flash and set
root variable". Thanks very much to Sascha and Alexander for
introducing into barebox building and flashing.

I have a basic scenario. Want to boot uImage and then hand over to the
root partition. With u-Boot this was very easy:

setenv bootargs "console=tty0 console=ttymxc0,115200n8
root=/dev/mmcblk0p3 rootfstype=ext4 rootwait ro"

With barebox however, when I boot the uImage, it complains about not
setting correct "root=".:

[ 1.718527] VFS: Cannot open root device "(null)" or
unknown-block(0,0): error -6
[ 1.726226] Please append a correct "root=" boot option; here are the
available partitions:

Now what i do in Barbox is the following;

(hint enter to go into console)
barebox@myhost:/ mkdir /media2
barebox@myhost:/ mount /dev/disk0.1 fat /media2
barebox@myhost:/ bootm /media2/uImage root=/dev/mmcblk0p3 rootfstype=ext4

I get the error with block (0,0). How can I change this? Thank you
very much for help.

Adam
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