=> mii device
MII devices: 'mdio@f00' 'ethernet@8000000port@1'
Current device: 'mdio@f00'
=> mi device ethernet@8000000port@1
=> mii dump 1 0
0.     (1140)                 -- PHY control register --
  (8000:0000) 0.15    =     0     reset
  (4000:0000) 0.14    =     0     loopback
  (2040:0040) 0. 6,13 =   b10    speed selection = 1000 Mbps
  (1000:1000) 0.12    =     1     A/N enable
  (0800:0000) 0.11    =     0     power-down
  (0400:0000) 0.10    =     0     isolate
  (0200:0000) 0. 9    =     0     restart A/N
  (0100:0100) 0. 8    =     1     duplex = full
  (0080:0000) 0. 7    =     0     collision test enable
  (003f:0000) 0. 5- 0 =     0     (reserved)


=> mii dump 0 0
0.     (1140)                 -- PHY control register --
  (8000:0000) 0.15    =     0     reset
  (4000:0000) 0.14    =     0     loopback
  (2040:0040) 0. 6,13 =   b10    speed selection = 1000 Mbps
  (1000:1000) 0.12    =     1     A/N enable
  (0800:0000) 0.11    =     0     power-down
  (0400:0000) 0.10    =     0     isolate
  (0200:0000) 0. 9    =     0     restart A/N
  (0100:0100) 0. 8    =     1     duplex = full
  (0080:0000) 0. 7    =     0     collision test enable
  (003f:0000) 0. 5- 0 =     0     (reserved)