MII_BCM54XX_EXP_DATA
return __phy_write(phydev, MII_BCM54XX_EXP_DATA, val);
val = __phy_read(phydev, MII_BCM54XX_EXP_DATA);
ret = __phy_read(phydev, MII_BCM54XX_EXP_DATA);
return __phy_write(phydev, MII_BCM54XX_EXP_DATA, new);