maxtmp_softc
void maxtmp_readport(struct maxtmp_softc *, u_int8_t, u_int8_t, int);
maxtmp_readport(struct maxtmp_softc *sc, u_int8_t cmd1, u_int8_t cmd2,
struct maxtmp_softc *sc = arg;
sizeof(struct maxtmp_softc), maxtmp_match, maxtmp_attach
struct maxtmp_softc *sc = (struct maxtmp_softc *)self;