Re: [PATCH 3/4] ARM: OMAP: Remove MPU-timer based sched_clock()

[Tony Lindgren <tony@atomide.com>]

* Kevin Hilman <khilman@mvista.com> [071126 07:59]:
> 
> On Fri, 2007-11-23 at 11:18 -0800, Tony Lindgren wrote:
> > * Kevin Hilman <khilman@mvista.com> [071112 15:25]:
> > > Remove MPU-timer based sched_clock() in favor of the common one based
> > > on 32k sync timer which works across all OMAP1/2/3 platforms.
> > > 
> > > Using 32k based one also gives a valid sched_clock() very early in the
> > > boot process.
> > 
> > AFAIK there is no 32k sync timer for 15xx, or have I missed something?
> > 
> 
> No there isn't.
> 
> But all this means is that 15xx has no higher resolution sched_clock().
> The ARM default jiffies-based one will be used.

I guess I don't understand what you're after by not using mpu timer 2
for proper sched_clock, some PM issues?

Maybe for PM reasons not having mpu timer 2 running could make sense if
it blocks some sleep states. But then again there's no timesource during
sleep states unless mpu timer 2 can use the 32K clock as a source clock..

Tony