TDA8444_MINOR_TO_DEVINST
instance = TDA8444_MINOR_TO_DEVINST(dev);
int instance = TDA8444_MINOR_TO_DEVINST(*devp);
int instance = TDA8444_MINOR_TO_DEVINST(dev);
int instance = TDA8444_MINOR_TO_DEVINST(getminor(dev));