efx_phc_gettime
.gettime64 = efx_phc_gettime,
rc = efx_phc_gettime(ptp, &time_now);
static int efx_phc_gettime(struct ptp_clock_info *ptp, struct timespec64 *ts);
.gettime64 = efx_phc_gettime,
rc = efx_phc_gettime(ptp, &time_now);
static int efx_phc_gettime(struct ptp_clock_info *ptp, struct timespec64 *ts);