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

David Brownell
2006-12-12T20:00:17Z

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.

- Dave