GPC_PU_PGC_SW_PUP_REQ
val = bus_space_read_4(sc->sc_iot, sc->sc_ioh, GPC_PU_PGC_SW_PUP_REQ);
bus_space_write_4(sc->sc_iot, sc->sc_ioh, GPC_PU_PGC_SW_PUP_REQ, val);