MII_AM79C_IR
err = phy_read(phydev, MII_AM79C_IR);
err = phy_write(phydev, MII_AM79C_IR, MII_AM79C_IR_IMASK_INIT);
err = phy_write(phydev, MII_AM79C_IR, 0);
irq_status = phy_read(phydev, MII_AM79C_IR);