[PATCH 2/2] n2100: reduce power button timer to 1 Hz
Mikael Pettersson
mikpe at it.uu.se
Mon Sep 28 06:25:34 EDT 2009
Lennert Buytenhek writes:
> On Sat, Sep 26, 2009 at 09:53:55PM +0200, Mikael Pettersson wrote:
>
> > The power button on the n2100 apparently does not generate
> > an interrupt when pressed, so the board support code sets
> > up a periodic timer to sample it.
> >
> > This timer operates at 10 Hz, which makes it the third worst
> > cause of timeouts in my kernel when idle.
> >
> > 10 Hz seems excessive, so this patch adds a compile-time option
> > to reduce the polling frequency to 1 Hz.
>
> How much power does this actually save?
I have no way of measuring that, unfortunately.
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