Segher Boessenkool wrote:

quoted

No, because that might break of_get_mac_address() which considers an 
all-zero MAC address to be invalid.

If you want to default a certain field, you shouldn't set it
to ? ? ? ?, but to the default value you have in mind :-)

Fair enough, but then we can't use it for local-mac-address, which was the whole point 
behind this discussion!  So you can use ? for every property *except* local-mac-address. 
If it's going to be this complicated, I say forget the whole thing.

-- 
Timur Tabi
Linux Kernel Developer @ Freescale