On Wed, Sep 03, 2025 at 04:37:46PM +0800, Wei Fang wrote:

quoted

Some PTP devices support looping back the periodic pulse signal for
debugging,

What kinds of debugs can be resolved by this loopback feature?

It seems pointless to me...

Vladimir helped explain its purpose in the thread, do you still think
it is pointless? If so, then I can only add a custom debugfs interface
to the ptp_netc driver, at least this will be a better debugging feature
for the NETC Timer. :)