[PATCH 3/4] mach-integrator: modernize clock event registration

[tglx@linutronix.de (Thomas Gleixner)]

On Thu, 8 Sep 2011, Linus Walleij wrote:

> On Thu, Sep 8, 2011 at 10:55 AM, Russell King - ARM Linux
> <linux@arm.linux.org.uk> wrote:
> >> Acked-by: Thomas Gleixner <tglx@linutronix.de>
> 
> > My understanding is that periodic timers are not setup by the generic
> > clock event code, and so we do need to keep the 'timer_reload' stuff
> > around.
> 
> Aha. Yes maybe I've not tested that mode well enough, I'll
> have a closer look.
> 
> An alteranative is to retire the periodic mode and only
> support oneshot, like the plat-nomadik/timer.c currently
> does. My impression is that oneshot will always work fine,
> and doing this leaves all details up to the timekeeping
> core so we don't need to deal with it, but I may be wrong.
> Ideas?

It does, but for a pure periodic setup (nohz=off, highres=off) you add
the overhead of reprogramming the device for each tick.

Thanks,

	tglx