/* Internal trigger function to start acquisition on AO subdevice.  */
static int pci224_ao_inttrig_start(struct comedi_device *dev, struct comedi_subdevice *s, unsigned int trignum)
/* Internal trigger function to start acquisition on AO subdevice.  */
static int pci224_ao_inttrig_start(struct comedi_device *dev, struct comedi_subdevice *s, unsigned int trignum)
{
	if (trignum != 0)
		return -EINVAL;
	s->async->inttrig = NULLFUNC;
	pci224_ao_start(dev, s);
	return 1;
}