Booting PhyTec PCM043/IMX35 from USB/SD-Card

[CRANESOFT]

Am 31.05.2012 um 20:27 schrieb Sascha Hauer <s.hauer at pengutronix.de>:

> 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
> 
Sascha,
I am sorry but this issue has not yet been resolved. I am currently out of office but will pick it up after my return. It may well be a Kernel configuration Problem.

Peter
> 
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