Broadcom BCM54xx/BCM57xx 10/100/Gigabit/2500
brgphy* at mii?
driver supports Broadcom BCM5400
100/1000TX Ethernet PHY interfaces, as well as the BCM5401, BCM541x, BCM5421,
BCM54K2, BCM5462, BCM546x, BCM570x, BCM5714, BCM5722, BCM575x, BCM5761,
BCM578x, BCM5906 and BCM57780 10/100/1000baseT Ethernet PHY interfaces, and
BCM5708S Gigabit/2500 Ethernet PHY interfaces.