1PARPORT_REGISTER_POR(9)      Parallel Port Devices     PARPORT_REGISTER_POR(9)
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NAME

6       parport_register_port - register a parallel port
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SYNOPSIS

9       struct parport * parport_register_port(unsigned long base, int irq,
10                                              int dma,
11                                              struct parport_operations * ops);
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ARGUMENTS

14       base
15           base I/O address
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17       irq
18           IRQ line
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20       dma
21           DMA channel
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23       ops
24           pointer to the port driver's port operations structure
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DESCRIPTION

27       When a parallel port (lowlevel) driver finds a port that should be made
28       available to parallel port device drivers, it should call
29       parport_register_port. The base, irq, and dma parameters are for the
30       convenience of port drivers, and for ports where they aren't meaningful
31       needn't be set to anything special. They can be altered afterwards by
32       adjusting the relevant members of the parport structure that is
33       returned and represents the port. They should not be tampered with
34       after calling parport_announce_port, however.
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36       If there are parallel port device drivers in the system that have
37       registered themselves using parport_register_driver, they are not told
38       about the port at this time; that is done by parport_announce_port.
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40       The ops structure is allocated by the caller, and must not be
41       deallocated before calling parport_remove_port.
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43       If there is no memory to allocate a new parport structure, this
44       function will return NULL.
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47Kernel Hackers Manual 3.10         June 2019           PARPORT_REGISTER_POR(9)
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