On Sun, May 13, 2018 at 1:05 PM, Andrew Lunn <andrew@xxxxxxx> wrote: >> > Hi Chen-Yu >> > >> > Are these delays the MAC applies? Not the PHY. It would be good to >> > make it clear here these are MAC imposed delays. >> >> Yes these are applied on the MAC side. Being described in the device >> tree bindings for the MAC, I thought this was implied to be the case? >> Are there known exceptions? > > There is frequent confusion with this. Most of the time, the PHY does > the delay, not the MAC, based on the phy-mode. So the MAC doing it is > an exception in itself. > > Do you actually need these delays for the board you adding support > for? Does the PHY not support adding the needed delays? If you don't > need the delays, i would not even implement them. Yes this is already used on the Bananapi M3. This patch merely reformats the description and adds a note saying this only applies to RGMII mode. ChenYu -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
