schsio_config_read
u_int8_t schsio_config_read(bus_space_tag_t iot, bus_space_handle_t ioh,
reg = schsio_config_read(iot, ioh, SCHSIO_IDX_DEVICE);
reg0 = schsio_config_read(sc->sc_iot, sc->sc_ioh, SCHSIO_IDX_REV);
reg0 = schsio_config_read(sc->sc_iot, sc->sc_ioh,
reg1 = schsio_config_read(sc->sc_iot, sc->sc_ioh,