540 struct comedi_device {  struct
541 	int use_count;
542 	struct comedi_driver *driver;
543 	struct comedi_8254 *pacer;
544 	void *private;
546 	struct device *class_dev;
547 	int minor;
548 	unsigned int detach_count;
549 	struct device *hw_dev;
574 	int (*open)(struct comedi_device *dev);  argument
575 	void (*close)(struct comedi_device *dev);  argument
576 	int (*insn_device_config)(struct comedi_device *dev,  argument
578 	unsigned int (*get_valid_routes)(struct comedi_device *dev,  argument