topic LS1028A IEEE1588 support with Phy timestamping in Layerscape

LS1028A IEEE1588 support with Phy timestamping

pb3 — Mon, 22 Jun 2026 16:19:42 GMT

Hello, I have a question regarding IEEE1588 support on LS1028A, I browsed through the available materials but did not find the answer for my question, namely -does Felix switch driver or MAC driver (I'm not sure which one) support IEEE1588 with timetamping being preformed by Ethernet Phy instead of MAC layer? I'm wondering because in theory using Phy timestamping should allow to achieve better precision since it's closed to the line. At least in theory. How does it work on this SoC?

Re: LS1028A IEEE1588 support with Phy timestamping

Bio_TICFSL — Tue, 23 Jun 2026 14:14:29 GMT

Hello,

No — on LS1028A, IEEE 1588/PTP timestamping is documented as being done by the SoC’s internal Ethernet hardware (ENETC MAC or Felix switch MAC/PTP block), not by the external Ethernet PHY. IEEE 1588 timestamping is handled internally by the ENETC/Felix MAC-side PTP hardware and separate PHC blocks, not by external PHY-based packet timestamping.

Regards