MII_KSZPHY_OMSO
ret = phy_read(phydev, MII_KSZPHY_OMSO);
ret = phy_write(phydev, MII_KSZPHY_OMSO, ret | KSZPHY_OMSO_B_CAST_OFF);
ret = phy_read(phydev, MII_KSZPHY_OMSO);
ret = phy_write(phydev, MII_KSZPHY_OMSO,
phy_clear_bits(phydev, MII_KSZPHY_OMSO, KSZPHY_OMSO_FACTORY_TEST);