[Buildroot] Problem with an MPC8272 build

[Jason Rennie <jason.rennie@rftechnology.com.au>]

Thanks for the tip Charles. I have made that change (after I booted the 
image and it got really upset that ttyS0 didn't exist) as well as using 
that memory address (and the one for CPM1) in the Early Kernel debugging 
option. All sadly give no output.

Is there anyway to tell if the system has booted apart from the boot 
output? I'm guessing the answer is very hardware dependent, but thought 
I would ask anyway.

Jason

On 2/08/2013 1:46 PM, Charles Krinke wrote:
>
> One thing to check is that you have defined a compatible root console. 
> Your printout indicates ttyCPM0 and in buildroot config, one can set 
> this to ttyCPM0 as it normally defaults to ttyS0
>
> Charles
>
> On Aug 1, 2013 4:49 PM, "Jason Rennie" 
> <jason.rennie@rftechnology.com.au 
> <mailto:jason.rennie@rftechnology.com.au>> wrote:
>
>     Hi,
>
>     I'm trying to get buildroot to work with an MPC8272 based device
>     that we have. I've been trying for a while and using google to see
>     if it can help but i'm getting nowhere so I thought I would try
>     going to the source.
>
>     I think i've set up buildroot correctly and have it configured to
>     be an mpc8272ads as the kernel defconfig. I know the kernel can be
>     built (so it seems) because the device does have an old 2.6.18
>     kernel running on it at the moment that boots successfully, using
>     U-Boot and an older version of buildroot to make the file system.
>
>     But now I can't get the kernel to boot at all. Or at least nothing
>     shows when it comes to booting the kernel.
>
>     Buildroot does run successfully, and I have put the rootfs that is
>     made on the device and it does boot successfully with the older
>     kernel (well mostly, some networking stuff appears to be missing).
>     But when I put the new kernel on the device I get nothing. I've
>     tried enabling early kernel debugging but with no success (setting
>     the CPM to the addresses suggested by the old kernels output). I
>     also don't seem to be able to get U-Boot to work and I need to end
>     up breaking out the BDI2000 anytime I try to update U-Boot with
>     the newer version as I brick the device.
>
>     I have tried with the most basic possible build, not tweaking
>     anything and basically just doing the stock buildroot build for
>     the MPC8272 through to poking and tweaking all sorts of thing.
>
>     Any tips? I've attached the old dmesg output if tht helps. I'm
>     hopelessly confused and been beating my head against this for a
>     month so any help would be greatly appreciated. I'm pretty much
>     out of ideas.
>
>     Jason
>
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