Symbol: IIR_TXRDY
sys/dev/serial/sio/sio.c
810
if (failures[6] & IIR_TXRDY) {
sys/dev/serial/sio/sio.c
847
failures[4] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_TXRDY;