#12064 HIGH 4-hardw: OFW doesn't support operation at 1 and 1.2 GHZ on XO-4

[Zarro Boogs per Child]

#12064: OFW doesn't support operation at 1 and 1.2 GHZ on XO-4
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 Reporter:  wad                  |                 Owner:  quozl     
     Type:  defect               |                Status:  new       
 Priority:  high                 |             Milestone:  4-hardware
Component:  ofw - open firmware  |               Version:  4-A2      
 Keywords:  xo-4                 |           Next_action:  code      
 Verified:  0                    |   Deployment_affected:            
Blockedby:                       |              Blocking:            
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 Quanta keeps requesting support for running the main cores at 1 GHz
 on XO-4.   Currently they run at 800 MHz on XO-4 A2 motherboards.

 I'm told that this requires firing up the second PLL, as the processors
 will
 no longer be synchronous to the memory interface.

 As with XO-1.75, we have a GPIO (#3, w. jumpers on the motherboard) which
 should select the processor frequency (0 for 1 GHz, 1 for 1.2 GHz).

 Quanta will have A2 boards with 1.2 GHz processors for testing by the
 end of next week (8/30/2012).

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Ticket URL: <http://dev.laptop.org/ticket/12064>
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