We (PLEB Project) are working on firmware for our boards, part of
the goal is to sort out a framework for supporting the sleep mode of the
processor (SA-11X0). We are going to initially do this with our own kernel
but want to get the framework to support other kernels. I'll try and get
some of our design up on the web soon for feedback.
Cheers Adam
On Tue, 18 Jan 2000, Erik Mouw wrote:
> 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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