Booting PhyTec PCM043/IMX35 from USB/SD-Card

[Sascha Hauer]

Hi Peter,

On Fri, May 25, 2012 at 11:35:36AM +0200, Peter Kuennemann at Crane-Soft wrote:
> 
> 
> To have kernel in flash and rootfs on MMC i tried bootargs as:
> 
> ... root=/dev/mmcblk0p1 rootfstype=ext2 rootflags=noatime rw noinitrd rootwait ..
> 
> and it boots the kernel properly from flash up to:
> ...
> mmcblk0: mmc0:a95c SD01G 968 MiB     <== Recognized the sd card
>  mmcblk0: p1                         <== and partion 1
> ...
> 1f00             256 mtdblock0 (driver?)
> 1f01             128 mtdblock1 (driver?)
> 1f02            2048 mtdblock2 (driver?)
> 1f03           30336 mtdblock3 (driver?)
> 1f04         1048576 mtdblock4 (driver?)
> b300          992000 mmcblk0 driver: mmcblk
>   b301          991585 mmcblk0p1                    <=== Something missing here?
> No filesystem could mount root, tried:  ext2        <===
> Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(179,1) <===
> 
> The mmc does contain a ext2 filesystem with the proper rootfs copied from
> the jffs2.image that I mounted under Ubuntu as loop device. The kernel has ext2 fs
> support compiled in.
> 
> The rootfs on the mmc is properly accessible when booting kernel and flash footfs
> on the very same platform.

Has this been solved in the mean time? The above looks correct, I have
no idea what's wrong.

Sascha


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