On Tue, 18 Jan 2000 17:45:26 +0100, Per Borgentun wrote:
> Have anyone used power management on StrongArm 1100,
> I couldn't find any driver when I glanced through the
> kernel code.
>
> What I want to do is to turn the processor to sleep
> mode and wake it up when some activity appears on the
> serial port (or some other GPIO port).
It has been done by the Itsy guys, but it's not open source. There is
currently no kernel support for sleep mode.
Sleep mode is not a trivial issue: you need support from your boot code:
wake up from sleep and reset are *almost* the same, you have to check a
register to see in what mode you're booted. After that you have to
re-enable paging and virtual memory and return to the kernel.
Maybe we're going to implement sleep mode in the future, but we're
currently working on clock scaling to get less power consumption.
Erik
--
LART. 250 MIPS under one Watt.
http://www-ict.its.tudelft.nl/~erik/open-source/LART/
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