Re: [PATCHv2 0/3] clocksource: add db8500 PRCMU timer

From: Mattias Wallin
Date: Thu Jun 02 2011 - 06:19:18 EST

On 06/02/2011 11:46 AM, Russell King - ARM Linux wrote:
Why don't we just find a way of fixing sched_clock so that the value
doesn't reset over a suspend/resume cycle?
Even if the value isn't reset during suspend/resume we want the clocksource to keep counting. Or is it ok to have the clocksource stop or freeze during suspend?
Then we have cpuidle. Is it ok to stop/freeze the timer during cpuidle sleep states?
My view is that sched_clock and the clocksource read should return the time since boot and keep counting during sleep and suspend. (In this case we use the same timer for both sched_clk and clocksource.)
IOW, lets fix the problem
for_everyone_ rather than only fixing it for one platform at a time.
I agree that fixing it for everyone would be better and I can give it a try if I get pointed in the right direction.
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