PTP_RTC_NANOSEC
[PTP_RTC_NANOSEC] = 0x0604,
[PTP_RTC_NANOSEC] = 0x0504,
ret = ksz_read32(dev, regs[PTP_RTC_NANOSEC], &nanoseconds);
ret = ksz_write32(dev, regs[PTP_RTC_NANOSEC], ts->tv_nsec);
ret = ksz_write32(dev, regs[PTP_RTC_NANOSEC], abs(nsec));