emcfan_read_registerr
return(emcfan_read_registerr(sc->sc_tag, sc->sc_addr, reg, res));
error = emcfan_read_registerr(tag, addr, EMCFAN_MANUFACTURER_ID, &res);
error = emcfan_read_registerr(sc->sc_tag, sc->sc_addr, EMCFAN_PRODUCT_ID, &product_id);
error = emcfan_read_registerr(sc->sc_tag, sc->sc_addr, EMCFAN_REVISION, &revision);