Re: [Linuxptp-users] LinuxPTP Software Timestamping only - PHC Concept

[Richard C. <ric...@gm...>]

On Mon, Nov 20, 2023 at 12:54:03PM -0500, Jean-Sebastien Stoezel wrote:

> When it comes to software timestamping, what is the PHC equivalent on the
> device? Is it a hardware timer? Or is it purely software? ethtool is
> reporting no PHC, and so I'd assume the PHC is some sort of software timer
> somewhere in the kernel.

With software timestamping, ptp4l adjusts the Linux system clock
(CLOCK_REALTIME) directly.

HTH,
Richard