PARPORT_UNREGISTER_D(9) Parallel Port Devices PARPORT_UNREGISTER_D(9)NAME
parport_unregister_device - deregister a device on a parallel port
SYNOPSIS
void parport_unregister_device(struct pardevice * dev);
ARGUMENTS
dev
pointer to structure representing device
DESCRIPTION
This undoes the effect of parport_register_device.
COPYRIGHT Kernel Hackers Manual 2.6. July 2010 PARPORT_UNREGISTER_D(9)
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PARPORT_REGISTER_POR(9) Parallel Port Devices PARPORT_REGISTER_POR(9)NAME
parport_register_port - register a parallel port
SYNOPSIS
struct parport * parport_register_port(unsigned long base, int irq, int dma, struct parport_operations * ops);
ARGUMENTS
base
base I/O address
irq
IRQ line
dma
DMA channel
ops
pointer to the port driver's port operations structure
DESCRIPTION
When a parallel port (lowlevel) driver finds a port that should be made available to parallel port device drivers, it should call
parport_register_port. The base, irq, and dma parameters are for the convenience of port drivers, and for ports where they aren't
meaningful needn't be set to anything special. They can be altered afterwards by adjusting the relevant members of the parport structure
that is returned and represents the port. They should not be tampered with after calling parport_announce_port, however.
If there are parallel port device drivers in the system that have registered themselves using parport_register_driver, they are not told
about the port at this time; that is done by parport_announce_port.
The ops structure is allocated by the caller, and must not be deallocated before calling parport_remove_port.
If there is no memory to allocate a new parport structure, this function will return NULL.
COPYRIGHT Kernel Hackers Manual 3.10 June 2014 PARPORT_REGISTER_POR(9)
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