// SPDX-License-Identifier: GPL-2.0
/* Copyright(c) 2013 - 2018 Intel Corporation. */
#include <linux/ptp_classify.h>
#include <linux/posix-clock.h>
#include "i40e.h"
#include "i40e_devids.h"
/* The XL710 timesync is very much like Intel's 82599 design when it comes to
* the fundamental clock design. However, the clock operations are much simpler
* in the XL710 because the device supports a full 64 bits of nanoseconds.
* Because the field is so wide, we can forgo the cycle counter and just
* operate with the nanosecond field directly without fear of overflow.
*
* Much like the 82599, the update period is dependent upon the link speed:
* At 40Gb, 25Gb, or no link, the period is 1.6ns.
* At 10Gb or 5Gb link, the period is multiplied by 2. (3.2ns)
* At 1Gb link, th
