LAN887X_MIS_DLL_CFG_REG0
txc = phy_read_mmd(phydev, MDIO_MMD_VEND1, LAN887X_MIS_DLL_CFG_REG0);
return phy_modify_mmd(phydev, MDIO_MMD_VEND1, LAN887X_MIS_DLL_CFG_REG0,