[beagleboard] Date/Time wildly jumping forward 2^17 seconds every few seconds/minutes

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21

Thanks for the advice.
I’m not really sure what to do - other than rely on the hwclock (because that reads the RTC) for accurate time perhaps?

Thanks again!
CJ

22

Can you confirm that using the patch results in non-posted mode of
operation for the timer?
You can use devmem to look at the register settings of the DMTimers.

Regards,
Vaibhav B.

23

btw,

we observe now reading the timer takes a considerable amount of cpu (~30%), is that expected?

E.-

24

Were you able to fix up that issue and then retest?

25

There will certainly be a hit on cpu usage but i don't know whether it
was profiled extensively.

Do you really need to read the timers registers so frequently? Can you
describe your usecase in more detail?

26

Enric,

May be I am missing something here, Can you please point me to the code which makes this assumption?

I expect that patch shouldn’t and doesn’t assume anything. During boot, in both the functions

  • omap2_gp_clocksource_init() – it sets to OMAP_TIMER_NONPOSTED mode.

  • omap_timer_init() - we set pdata->timer_errata = OMAP_TIMER_ERRATA_I103_I767

Thanks,

Vaibhav