PMU_CFG
val = PHY_READ(sc, PMU_CFG);
PHY_WRITE(sc, PMU_CFG, val);
val = PHY_READ(sc, PMU_CFG);
PHY_WRITE(sc, PMU_CFG, val);
val = PMU_READ(sc, phy->phy_index, PMU_CFG);
PMU_WRITE(sc, phy->phy_index, PMU_CFG, val);