parport_open — find a device by canonical device number
struct pardevice * parport_open
(int devnum, const char * name, int (*pf)
(void *), void (*kf)
(void *), void (*irqf)
(int, void *), int flags, void * handle);
canonical device number
name to associate with the device
preemption callback
kick callback
interrupt handler
registration flags
driver data
This function is similar to parport_register_device, except that it locates a device by its number rather than by the port it is attached to.
All parameters except for devnum are the same as for parport_register_device. The return value is the same as for parport_register_device.