On Fri, 2015-10-30 at 10:15 +0100, Geert Uytterhoeven wrote: > Hi Sjoerd, > > On Thu, Oct 29, 2015 at 9:44 PM, Sjoerd Simons > <sjoerd.simons@xxxxxxxxxxxxxxx> wrote: > > Add an ethernet0 alias for the wired network card and an all 0 > > default > > mac address so that u-boot can find the device-node and fill in the > > mac address. > > Thanks a lot! > > I had the same issue on another board, and adding an "ethernet0" > alias > fixes it. Happy to help, this stuff is really not that well document unfortunately. > > @@ -130,6 +134,8 @@ > > }; > > > > &gmac { > > + /* To be filled in by U-Boot */ > > + mac-address = [00 00 00 00 00 00]; > > status = "ok"; > > }; > > Note that in my case I didn't have to add an empty mac-address > property. > U-Boot (2015.04-something --- don't have the sources) seems to add a > "local-mac-address" property automatically. After submitting the patch i actually dived a bit deeper at how this all hangs together. The linux kernel checks for mac-address, local-mac-address and address in the fdt node, in that order of preference. u-boot (at least recent ones like you have), will set the mac-address property *if* it's already defined but will always create the local-mac-address property regardless. So indeed practially, as you noticed, just setting the alias is enough. I'm now just very confused about the intended meanings of the properties, Documentation/devicetree/bindings/net/ethernet.txt doesn't shed a lot of light on it: - local-mac-address: array of 6 bytes, specifies the MAC address that was assigned to the network device; - mac-address: array of 6 bytes, specifies the MAC address that was last used by the boot program; should be used in cases where the MAC address assigned to the device by the boot program is different from the "local-mac-address"property; So yeah, I'm not sure what the "correct" fix is. It's tempting to indeed just leave out the mac-address property though :) -- Sjoerd Simons Collabora Ltd. -- 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