[PATCH 1/3] mpc83xx: Power Management support

Scott Wood scottwood at freescale.com
Fri Jun 27 00:07:44 EST 2008

Kumar Gala wrote:
> On Jun 25, 2008, at 4:50 PM, Scott Wood wrote:
>> Basic PM support for 83xx.  Standby is implemented as sleep.
>> Suspend-to-RAM is implemented as "deep sleep" (with the processor
>> turned off) on 831x.  PCI agent power management is supported.
>> Device power management of SOC peripherals is not yet supported.
> (Not comments on this patch, but related)
> Do you know if anyone is looking at making sure DOZE/NAP work on 83xx?  
> We clearly don't flush the L1 cache today in the 6xx code.

Doze should work (a long time ago when I did power measurements I saw a 
drop in consumption once Linux started, and the system was idle)...  Nap 
is not supported, and should probably be removed from the e300 cputable 
entry.  I don't think it's worthwhile to flush the cache every time the 
cpu is idle just to nap instead of doze.


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