HW support of ptp/timesync solutions in network PHY chips can be achieved with two different approaches, the timestamp maybe latched either in the beginning or after the Start of Frame Delimiter (SFD) [1].
Allow ptp device drivers to provide user with control over the timestamp latch point. [1] https://www.ieee802.org/3/cx/public/april20/tse_3cx_01_0420.pdf v3: - move new enum ptp_ts_point to uapi ptp_clock.h and add NONE value to indicate that the timestamp latch point was not provided by the HW, allow further changes to ethtool netlink interface exstensions. Arkadiusz Kubalewski (2): ptp: add control over HW timestamp latch point ice: ptp: add control over HW timestamp latch point Documentation/ABI/testing/sysfs-ptp | 12 +++++ drivers/net/ethernet/intel/ice/ice_ptp.c | 44 +++++++++++++++ drivers/net/ethernet/intel/ice/ice_ptp_hw.c | 60 +++++++++++++++++++++ drivers/net/ethernet/intel/ice/ice_ptp_hw.h | 2 + drivers/ptp/ptp_sysfs.c | 44 +++++++++++++++ include/linux/ptp_clock_kernel.h | 12 +++++ include/uapi/linux/ptp_clock.h | 18 +++++++ 7 files changed, 192 insertions(+) base-commit: 0452a2d8b8b98a5b1a9139c1a9ed98bccee356cc -- 2.38.1
