On Fri, 2007-01-19 at 20:13 +0100, Guennadi Liakhovetski wrote:
> > +static u32 clockevent_mode = 0;
> > +
> > +static void pxa_set_next_event(unsigned long evt,
> > + struct clock_event_device *unused)
> > +{
> > + OSMR0 = OSCR + evt;
> > +}
>
> This doesn't work for me in various nasty ways. Please, check for a
> minimum delay or loop to get ahead of time. See code in the "old" timer
> ISR. See how it unconditionally adds at least 10 ticks...
I added support for match register based devices and you want to do
something like this:
static int hpet_next_event(unsigned long delta,
struct clock_event_device *evt)
{
unsigned long cnt;
cnt = hpet_readl(HPET_COUNTER);
cnt += delta;
hpet_writel(cnt, HPET_T0_CMP);
return ((long)(hpet_readl(HPET_COUNTER) - cnt ) > 0);
}
The generic code takes care of the already expired event.
tglx
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