The driver does read the time over MDIO. It takes around ~100usec. Are there some known tricks in cases like this ?
Regards, Joseph On Thu, May 20, 2021 at 6:28 PM Richard Cochran <richardcoch...@gmail.com> wrote: > On Wed, May 19, 2021 at 10:31:00PM +0300, Joseph Matan wrote: > > *Platform:* > > > > My board is running with KSZ9477 switch (with HW timestamping support) on > > linux 4.19. > > I guess that the time is read over MDIO. If so, that explains the > jitter in the measured offsets. > > HTH, > Richard >
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