On Wed, Jul 29, 2020 at 11:58:07AM +0100, Russell King - ARM Linux admin wrote: > How do we deal with this situation - from what I can see from the > ethtool API, we have to make a choice about which to use. How do we > make that choice?
Unfortunately the stack does not implement simultaneous MAC + PHY time stamping. If your board has both, then you make the choice to use the PHY by selecting NETWORK_PHY_TIMESTAMPING at kernel compile time. (Also some MAC drivers do not defer to the PHY properly. Sometimes you can work around that by de-selecting the MAC's PTP function in the Kconfig if possible, but otherwise you need to patch the MAC driver.) > Do we need a property to indicate whether we wish to use the PHY > or MAC PTP stamping, or something more elaborate? To do this at run time would require quite some work, I expect. Thanks, Richard
