MSCC_PHY_TR_MSB
reg = phy_base_read(phydev, MSCC_PHY_TR_MSB);
phy_base_write(phydev, MSCC_PHY_TR_MSB, reg);
__phy_write(phydev, MSCC_PHY_TR_MSB, val >> 16);
phy_base_write(phydev, MSCC_PHY_TR_MSB, val >> 16);