On Tue, Jul 19, 2022 at 09:02:37PM -0700, Richard Cochran wrote: > > I am not sure how accurate a software timestamp for a wifi device would > > be, given the potential delay between timestamp and actual transmission. > > WiFi on Linux is never going to support PTP. The issue is the closed > source radio firmware. End of story.
I tested driver TX timestamping in the mt76 driver, where the firmware is supposed to be very simple, but IIRC it didn't make a noticeable difference when compared to user-space TX timestamping. But if there is demand, I think we could see wireless chips with HW-timestamping support in future. If the stations can hear each other, maybe it wouldn't even be necessary for the access point to support PTP, like when using a cheap Ethernet hub instead of expensive switch with PTP support. -- Miroslav Lichvar _______________________________________________ Linuxptp-users mailing list Linuxptp-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linuxptp-users
