ug2_read
if (ug2_read(sc, UG2_MISC_BANK, UG2_BOARD_ID, 2, buf) != 2) {
if (ug2_read(sc, UG2_SENSORS_BANK, UG2_VALUES_OFFSET +
int ug2_read(struct ug_softc *, uint8_t, uint8_t, uint8_t, uint8_t*);