[U-Boot-Users] PPC440GX reset command doesn't work

[Andrew Wozniak]

Howard, Marc wrote:
> Try putting a scope/logic analyzer on your SYSRESET* line to see if it
> is getting pulled down when you try to reset from U-Boot.

Good point. But shouldn't the core and chip level reset still function,
independent of the external reset line?  The answer might be buried
somewhere in the PPC440 tech manuals.

I might also talk to our hardware guys about this.

> Marc W. Howard
> 
> 
> 
>>-----Original Message-----
>>From: u-boot-users-admin at lists.sourceforge.net 
>>[mailto:u-boot-users-admin at lists.sourceforge.net] On Behalf 
>>Of Andrew Wozniak
>>Sent: Tuesday, June 07, 2005 10:48 AM
>>To: tsawyer+u-boot at sandburst.com
>>Cc: U-Boot mailing list
>>Subject: Re: [U-Boot-Users] PPC440GX reset command doesn't work
>>
>>Travis B. Sawyer wrote:
>>
>>>Andrew Wozniak wrote:
>>>
>>>
>>>>Andrew Wozniak wrote:
>>>>
>>>>
>>>>>We have a custom PPC440GX board running a ported version 
>>
>>of U-Boot based
>>
>>>>>on the OCOTEA codebase. Most U-Boot commands are working 
>>
>>- life is good.
>>
>>><SNIP>
>>>
>>>>>Just wondering if anyone else with a PPC440 target had any special
>>>>>modifications to make 'reset' work.
>>>>
>>>>
>>>Nope, it just works, on 3 different 440gx targets I have.  The XES
>>>XPedite1000, the Ocotea, and our custom hardware...
>>
>>hmmm.... will have to investigate further.
>>
>>Could our problem be related to how our PPC is configured from serial
>>eeprom? Or might is be that DBCR (or some other control register) is
>>misconfigured - disallowing a "system reset"?
>>
>>Thanks for confirming proper 'reset' operation as currently 
>>implemented.
>>
>>
>>>-travis
>>>
>>>
>>
>>
>>
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> 
>