Re: nokia 770 [was Re: community PM requirements/issues and PowerOP]

Eugeny S. Mints
2006-12-13T12:12:07Z

David Brownell wrote:
> On Tuesday 19 September 2006 11:25 am, Pavel Machek wrote:
>> Could you perhaps provide list of operating points for 770? It would
>> help understanding a bit, I'd say.
>
> If there was a followup here, I missed it ...
>
> ISTR that it doesn't use (formal) operating points, and that a lot of the
> basic SOC power savings (vs powering off the display or wifi) come from a
> different kind of mechanism entirely. Namely, a combination of dynamic
> tick with a modified system idle task, which enters one of the OMAP low
> power modes during those long periods between clock ticks or other irqs.
>
> That's one of the standard power saving schemes used on OMAP1 platforms
> with Linux.
sample of reasonable operating points for OMAP1 platforms along with appropriate
patches may be found at http://dynamicpower.sourceforge.net/dpm-omap.html

Eugeny
>
> - Dave
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