efx_phc_adjtime
.adjtime = efx_phc_adjtime,
rc = efx_phc_adjtime(ptp, timespec64_to_ns(&delta));
static int efx_phc_adjtime(struct ptp_clock_info *ptp, s64 delta);
.adjtime = efx_phc_adjtime,
rc = efx_phc_adjtime(ptp, timespec64_to_ns(&delta));
static int efx_phc_adjtime(struct ptp_clock_info *ptp, s64 delta);