PTP_CLOCK_PPSUSR 483 drivers/net/ethernet/mellanox/mlx5/core/lib/clock.c ptp_event.type = PTP_CLOCK_PPSUSR; PTP_CLOCK_PPSUSR 1394 drivers/net/ethernet/sfc/ptp.c ptp_evt.type = PTP_CLOCK_PPSUSR; PTP_CLOCK_PPSUSR 331 drivers/ptp/ptp_clock.c case PTP_CLOCK_PPSUSR: