MSCC_PHY_PROC_CMD
phy_base_write(phydev, MSCC_PHY_PROC_CMD, PROC_CMD_NCOMPLETED | val);
reg_val = phy_base_read(phydev, MSCC_PHY_PROC_CMD);
phy_base_write(phydev, MSCC_PHY_PROC_CMD, PROC_CMD_NOP);
phy_base_write(phydev, MSCC_PHY_PROC_CMD, PROC_CMD_MCB_ACCESS_MAC_CONF |