From: Scott Wood <scottwood@freescale.com>
To: Dorin D <dorin1234@outlook.com>
Cc: "linuxppc-dev@lists.ozlabs.org" <linuxppc-dev@lists.ozlabs.org>
Subject: Re: Linux 2.6.32 PowerPC MTD partition mounted at boot
Date: Tue, 8 Oct 2013 16:47:30 -0500 [thread overview]
Message-ID: <1381268850.7979.279.camel@snotra.buserror.net> (raw)
In-Reply-To: <BAY176-W43D0B5AD1BD2454470D8AFA6210@phx.gbl>
On Wed, 2013-09-18 at 22:43 -0400, Dorin D wrote:
> I am working on bringing up two Linux systems, both based on Freescale
> PowerPC devices, one is a MPC8349, the other a P1020. I was able to
> build, install and boot the kernel on both cards. The kernel is 2.6.32
> and the toolchains are coming from the LTIBs packages from
> Freescale.
>
> Both cards have a 32 MByte NOR flash memory (AMD) boot flash. I have
> Uboot, kernel, RAM disk image and DTB in the boot flash and I want to
> use the spare space (about 20 MBytes) as flash file system.
>
> I have the following problem : the P1020 board boots fine using the
> RAM disk with the flash in the device tree , shows the flash device
> partitions (JFFS2) and DOESN"T try to mount a flash partition as root.
> The MPC8349 boots fine from the RAM disk but, after identifying the
> flash partitions, the kernel panics because is looking for a flash
> partition to mount as root partition and none of them is usable (not
> formatted). If I remove the flash from the device tree, the card boots
> fine using the RAM disk.
>
>
> I am not too familiar with Linux boot scripts and I didn't figure out
> where I can disable this tentative of mounting the MTD partition. I
> want the boards to boot and mount the RAM disk, as the P1020 board
> does. The flash partition will be initialized and mounted at a later
> time, but not as root partition.
Compare the kernel command line and kernel config for the two boards;
there's probably a relevant difference there (especially with the
"root=" parameter).
-Scott
prev parent reply other threads:[~2013-10-08 21:48 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-09-19 2:43 Linux 2.6.32 PowerPC MTD partition mounted at boot Dorin D
2013-10-08 21:47 ` Scott Wood [this message]
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