age_miibus_readreg
sc->sc_miibus.mii_readreg = age_miibus_readreg;
reg = age_miibus_readreg(&sc->sc_dev, sc->age_phyaddr,
reg = age_miibus_readreg(&sc->sc_dev, sc->age_phyaddr,
reg = age_miibus_readreg(&sc->sc_dev, sc->age_phyaddr,
int age_miibus_readreg(struct device *, int, int);