M_DUART_RX_EN     497 drivers/tty/serial/sb1250-duart.c 	write_sbdchn(sport, R_DUART_CMD, M_DUART_TX_DIS | M_DUART_RX_EN);
M_DUART_RX_EN     609 drivers/tty/serial/sb1250-duart.c 		command = M_DUART_RX_EN;