ethernet with dp83848 on RMII mode

[Bilge]

I changed ethernet transceiver chip .My ethernetif.c file works with lan8742 but I have to use dp83848 on my project.I've compare datasheets of two chips and I've edited lan8742.c-h files according to dp83848's datasheet.However it's not work.

Is there anybody have any idea about this?