Hi !

I have own out-of-tree device drivers and can't define your own ones:

/** Maximum length of the link address */
#ifdef CONFIG_NET_L2_IEEE802154
#define NET_LINK_ADDR_MAX_LENGTH 8
#else
#ifdef CONFIG_NET_L2_PPP
#define NET_LINK_ADDR_MAX_LENGTH 8
#else
#define NET_LINK_ADDR_MAX_LENGTH 6
#endif
#endif

But I need NET_LINK_ADDR_MAX_LENGTH 8 bytes

Can default LINK address size to be set to 8 bytes or have independant configuration for avoid binding with limited set of L2 drivers.