drivebay_readreg
sc->sc_state = drivebay_readreg(sc, PCAGPIO_OUTPUT);
sc->sc_dir = drivebay_readreg(sc, PCAGPIO_CONFIG);
sc->sc_in = drivebay_readreg(sc, PCAGPIO_INPUT);
int reg = drivebay_readreg(sc, PCAGPIO_INPUT);
int reg = drivebay_readreg(sc, PCAGPIO_INPUT);
int reg = drivebay_readreg(sc, PCAGPIO_INPUT);
int reg = drivebay_readreg(sc, PCAGPIO_INPUT);
static uint32_t drivebay_readreg(struct drivebay_softc *, int);