Richard Zidlicky wrote: > Btw the interrupt need not to be hardware, for the Q40 I test > a rtc register once per jiffie and generate a "soft interrupt". > It could be done generic at least for m68k. > I have written an experiemntal ptimer driver to do just this and potential more. Such a device is useful for real-time programming (e.g., when you try to implement a periodic user task). See http://linux.junsun.net/realtime-linux/preemption-test The driver is architecture independent (i.e., linux-common code) Due to the different programming needs behind periodic timers (or user-level timer) and RTC operations, my vote for future work is to leave them as two separate drivers. To me, RTC is really just to read/write RTC clock. Jun
