RP2_UART_CTL_FLUSH_TX_m  514 drivers/tty/serial/rp2.c 		    RP2_UART_CTL_FLUSH_RX_m | RP2_UART_CTL_FLUSH_TX_m);
RP2_UART_CTL_FLUSH_TX_m  518 drivers/tty/serial/rp2.c 		    RP2_UART_CTL_FLUSH_RX_m | RP2_UART_CTL_FLUSH_TX_m);