wbsio_conf_read
reg_id = wbsio_conf_read(iot, ioh, WBSIO_ID);
reg_rev = wbsio_conf_read(iot, ioh, WBSIO_REV);
sc->sc_devid = wbsio_conf_read(sc->sc_iot, sc->sc_ioh, WBSIO_ID);
reg0 = wbsio_conf_read(sc->sc_iot, sc->sc_ioh, WBSIO_HM_ADDR_LSB);
reg1 = wbsio_conf_read(sc->sc_iot, sc->sc_ioh, WBSIO_HM_ADDR_MSB);