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Date: Sat, 1 Mar 2008 14:57:40 -0800 From: David Brownell <david-b@...bell.net> To: Bosko Radivojevic <bosko.radivojevic@...il.com> Cc: lkml <linux-kernel@...r.kernel.org> Subject: Re: High resolution timers on AT91SAM926x > Is there a way to enable high resolution timers on AT91SAM926x? Update PIT to support the clocksource/clockevent framework: http://marc.info/?l=linux-arm-kernel&m=119940724711435&w=2 Declare timer/counter block platform devices: http://marc.info/?l=linux-arm-kernel&m=120302318811110&w=2 Use timer/counter blocks for better clocksource and clockevents: http://marc.info/?l=linux-kernel&m=120373043520279&w=2 http://marc.info/?l=linux-kernel&m=120373063320487&w=2 The focus in that last patch is on NO_HZ support -- so the clockevents run at 32 KiHz (about 31 usec precision for HRT) to allow overall HZ to run below 1 where practical. If you need even higher precision, you could update that clockevent code to use a different base clock. Those last two patches are in some MM tree, and Haavard has some updates to then (which don't much affect functionality). I understand the upcoming 2.6.24-at91 patch will include the first two patches. - Dave -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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