Thank you for contacting Intel Embedded Community.
You may find the available driver for the cited Ethernet Controller on the following website:
Thank you for answer.
Nevertheless the link you provided is not for i225 and concerned only OS, not u-boot.
In other word the link is valid only for : i210, 82579, 82590 and 82583.
I am looking for code in this mainstream provided by intel but in this case only for i210 :
I am looking for the same kind of driver but compliant with i225.
Thanks in advance for your help