Synopsys DesignWare Ethernet XPCS

modulename: pcs_xpcs.ko

configname: CONFIG_PCS_XPCS

Linux Kernel Configuration
└─>Device Drivers
└─>Network device support
└─>PCS device drivers
└─>Synopsys DesignWare Ethernet XPCS
In linux kernel since version 4.14.326 (release Date: 2023-09-23)  
This module provides a driver and helper functions for Synopsys
DesignWare XPCS controllers.

source code:
drivers/net/pcs/
selects
CONFIG_PHYLINK