PHY_INT_SRC
ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_SRC);
smsc75xx_mdio_write(dev->net, mii->phy_id, PHY_INT_SRC,
ret = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC);
smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_SRC, 0xffff);