MTK_UART_EFR
serial_out(up, MTK_UART_EFR, UART_EFR_ECB);
serial_out(up, MTK_UART_EFR, UART_EFR_ECB);
serial_out(up, MTK_UART_EFR, serial_in(up, MTK_UART_EFR) &
serial_out(up, MTK_UART_EFR, MTK_UART_EFR_HW_FC |
(serial_in(up, MTK_UART_EFR) &
serial_out(up, MTK_UART_EFR, MTK_UART_EFR_XON1_XOFF1 |
(serial_in(up, MTK_UART_EFR) &