[Linuxptp-users] MPC8308rdb

[Chris L. <cl...@gm...>]

Hello

I am using buildroot 2013.02 and have a working system. I have been trying
to use the testptp application to verify operation of the 1588 pps, alarm,
and trigger interface. The code compiles and executes. I get the ptp
capabilities listing using "-c" and it is consistent with the data in
/sys/class/ptp/ptp0; alarm=1, external trigger=2, pps = 1, periodic=0.

However, I get an error when I try to set a oneshot or periodic alarm.
"timer_create: Operation not supported". Further, when I enable pps output,
"echo '0 1' > /sys/class/ptp/ptp0/pps_enable", none of the pps pins toggle
though no error is indicated.

Kernel 3.7.1
uclibc 0.9.33.2 with NPTL


As far as I can tell this should work. The one other piece of information I
can offer is that the DAC which drives the VCXO supplyingTSEC_TMR_CLK is
not populated so no external clock is supplied to the interface. This
shouldn't matter as TMRCK is available internally.



What am I missing?

Regards

Chris LaRocque
Virginia, USA