> So my questions: > - is the one-shot alarm functionality of the PHC actually implemented in any > driver?
No. > - how can I implement this in the freescale FEC driver without > having to modify the kernel? (ptp_clock_kernel.h and > drivers/ptp/ptp_clock.c) You can't implement this without changing the kernel. > Hopefully I’m missing something and there is a simple way to get the > alarm functionality working. Unfortunately, you understood the kernel sources well enough. There is a non-trivial amount of work to implement the timer in the PHC core code. I decided some time ago that the possible benefit is not worth the effort required. I would say most use cases can be adequately covered by: 1. using a PREEMPT_RT kernel 2. synchronizing the system time from the PHC using phc2sys 3. programming a normal high resolution timer using CLOCK_MONOTONIC or CLOCK_REALTIME. Sorry, Richard ------------------------------------------------------------------------------ _______________________________________________ Linuxptp-users mailing list Linuxptp-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linuxptp-users
