MVSPI_CTRL_REG
PUTREG(sc, MVSPI_CTRL_REG, (sc->sc_transfer->st_slave << 2));
ctl = GETREG(sc, MVSPI_CTRL_REG);
PUTREG(sc, MVSPI_CTRL_REG, ctl);
int ctl = GETREG(sc, MVSPI_CTRL_REG);
PUTREG(sc, MVSPI_CTRL_REG, ctl);
ctl = GETREG(sc, MVSPI_CTRL_REG);
PUTREG(sc, MVSPI_CTRL_REG, ctl);
if (GETREG(sc, MVSPI_CTRL_REG) &