Intel IXP46x as PTP clock

configname: CONFIG_PTP_1588_CLOCK_IXP46X

Linux Kernel Configuration
└─>Device Drivers
└─>Network device support
└─>Ethernet driver support
└─>Intel IXP46x as PTP clock
In linux kernel since version 3 (release Date: 2011-07-21)  
This driver adds support for using the IXP46X as a PTP
clock. This clock is only useful if your PTP programs are
getting hardware time stamps on the PTP Ethernet packets
using the SO_TIMESTAMPING API.

To compile this driver as a module, choose M here: the module
will be called ptp_ixp46x.