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 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 | 46 +++++++++++++++++ drivers/net/ethernet/intel/ice/ice_ptp_hw.c | 57 +++++++++++++++++++++ drivers/net/ethernet/intel/ice/ice_ptp_hw.h | 2 + drivers/ptp/ptp_sysfs.c | 44 ++++++++++++++++ include/linux/ptp_clock_kernel.h | 29 +++++++++++ 6 files changed, 190 insertions(+) -- 2.38.1
