MDIO_OATC14_PLCA_CTRL1
ret = phy_read_mmd(phydev, MDIO_MMD_VEND2, MDIO_OATC14_PLCA_CTRL1);
MDIO_OATC14_PLCA_CTRL1);
MDIO_OATC14_PLCA_CTRL1, val);