Symbol: IMXUART_UCR4
sys/dev/fdt/imxuart.c
540
sc->sc_ucr4 = bus_space_read_2(iot, ioh, IMXUART_UCR4);
sys/dev/ic/pluart.c
619
sc->sc_ucr4 = bus_space_read_4(iot, ioh, IMXUART_UCR4);