REG_IOR
sc->cache.ior[gp->grpnum] = nct_read_reg(sc, REG_IOR, gp->grpnum);
case REG_IOR: return ("io");
KASSERT(reg == REG_IOR || reg == REG_INV,
if (reg == REG_IOR)
nct_set_pin_reg(sc, REG_IOR, pin_num, val);