I need to disable auto negotiation of phy DP83640 in stmmac driver or maybe other place (uclinux 2014R1), but I donot know how .
The reason why I need to do this is that our customer board referring to bf609-ezkit has PHY DP83640 worked in Fiber mode.
According to DP83640's datasheet, in Fiber mode it can work at 100 Mb only and does not support Auto-Negotiation.
The Auto-Negotiation will result in the phy working at 10Mb speed so that the host PC cannot find the board.
Does anyone have any advice to cope this?