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From: Kumar Gala <galak@kernel.crashing.org>
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Subject: Re: 85xx software reset problems from paulus.git
Date: Tue, 27 Nov 2007 01:38:21 -0600
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>> Yes. The symptoms in 2.6.24RC2 are that during a kernel panic or when
>> calling 'reboot' in the shell, it just hangs. Using the same dts and
>> resets in 2.6.23.1 reboots fine. I don't have a cds reference, but
>> someone who does should be able to confirm whether the issue exists  
>> or
>> not by just attempting to reboot via bash.

Can someone do a git-bisect and find the patch that breaks things?

>> ACK. Exactly the same over here (mpc8540ads compatible).
> I added the global-utilities today as well, but reboot fails.

if you are on a 8540 GUTS doesn't support hreset_req (8548 or newer).

> Why is the guts stuff missing i.e. in most of the shipped
> mpc85xx*.dts? Does it depend on some hardware connections
> external to the CPU?

Only the 8548 or newer CPUs have the GUTS HRESET_REQ ability that we  
use to reset. (8540, 8560, 8541, 8555 do not).

- k