Drivers for PHY emulation on fixed speed/link

modulename: fixed.ko

and/or

dsa_loop_bdinfo.ko

and/or

fixed_phy.ko

configname: CONFIG_FIXED_PHY

Linux Kernel Configuration
└─>Device Drivers
└─>Network device support
└─>PHY Device support and infrastructure
└─>Drivers for PHY emulation on fixed speed/link
In linux kernel since version 2.6.20 (release Date: 2007-02-04)  
Adds the driver to PHY layer to cover the boards that do not have any PHY bound,
but with the ability to manipulate the speed/link in software. The relevant MII
speed/duplex parameters could be effectively handled in a user-specified function.
Currently tested with mpc866ads.

source code:
drivers/net//phy/fixed.c
selects

CONFIG_SWPHY