Hi Keith,
On 05/12/2018 00:02, Keith Squier wrote:
I'm at a lost as to what to do next. I have an embedded system with an
imx6 using the fec driver. It will properly sync to a master when
using software timestamps, but it will never sync when using hardware
timestamps.
When I make the system behave as a master clock and use phc2sys with
"-a -r -r", it says it's synchronizing eth0 to CLOCK_REALTIME, which
is what I would expect, except that it never updates the ptp0 clock.
In fact, the time in /dev/ptp0 never changes, and the offset continues
to grow. The ptp0 clock is stuck. Running "testptp -g" always gives me
the same time.
we are also using PTP on an imx6. IIRC the imx6 needs a reference clock
on GPIO_16 / ENET_REF_CLK for the ieee1588 timer to run. There is a
whole chapter about this in the imx6 Hardware Development Guide. So you
might check that the reference clock is setup correctly in the device-tree.
Hannes
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