On Mon, May 22, 2023 at 10:03:23AM -0700, Rahul Rameshbabu wrote:

This point makes sense to me. However, I have a concern about the case
where the linuxptp servo has not had a chance to make a single frequency
adjustment (0 ppb) and .adjphase/LOCKED_STABLE state is initially
called/reached. After converging, the frequency will be close to the
remote time's server's frequency, but that frequency will likely not be
0 ppb. If .adjfine had been called previously, the difference between
the remote time server's frequency and the cached frequency in the ptp
stack would likely be significantly closer. That said, do you think it
makes sense to have some kind of API that gives information about the
in-HW controller such as the frequency offset it operated? Or maybe in
general an API in the future for introspecting the state of this in-HW
servo?

The whole point of hardware vendors doing this is to hide their
implementation from prying eyes.  So they are not going to provide
introspection at all.

Thanks,
Richard