On Mon, Jan 16, 2017 at 04:19:15PM +0800, Hardik Gohil wrote:
> I have a message when I configure GPS to work PTP in Peer-to-Peer mode

It is not enough to configure the master alone, you must also
configure the slave in P2P mode.
 
> ptp4l[18815.624]: port 1: received PDELAY_REQ without timestamp
> ptp4l[18815.624]: port 1: received PDELAY_REQ without timestamp
> ptp4l[18815.624]: port 1: received PDELAY_REQ without timestamp

This means that the application received a PDelay_Req message, but the
driver did not provide a HW time stamp.

This error most likely indicates a driver or HW problem.

The fact that you have three such messages all occurring within one
millisecond of each other is suspicious.  You should think about that
and find out why this is happening.

HTH,
Richard



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