MLB_USIO_SSR_TDRE  348 drivers/tty/serial/milbeaut_usio.c 				 MLB_USIO_SSR_TDRE;
MLB_USIO_SSR_TDRE  409 drivers/tty/serial/milbeaut_usio.c 	while (!(readb(port->membase + MLB_USIO_REG_SSR) & MLB_USIO_SSR_TDRE))