nvt_readreg
cfg = nvt_readreg(sc, NVT_CONFIG);
vctrl1 = nvt_readreg(sc, NVT_VOLT_CTRL1);
vctrl2 = nvt_readreg(sc, NVT_VOLT_CTRL2);
tctrl1 = nvt_readreg(sc, NVT_TEMP_CTRL1);
tctrl2 = nvt_readreg(sc, NVT_TEMP_CTRL2);
fctrl1 = nvt_readreg(sc, NVT_FANIN_CTRL1);
fctrl2 = nvt_readreg(sc, NVT_FANIN_CTRL2);
bsr = nvt_readreg(sc, NVT_BANKSELECT);
data = nvt_readreg(sc, reg);
vrlsb = nvt_readreg(sc, NVT_VRLSB);
data = nvt_readreg(sc, NVT_TR5 + i);
vrlsb = nvt_readreg(sc, NVT_VRLSB);
data = nvt_readreg(sc, NVT_FANIN1_COUNT + i);
vrlsb = nvt_readreg(sc, NVT_VRLSB);
uint8_t nvt_readreg(struct nvt_softc *, uint8_t);