staging: comedi: drivers: introduce comedi_request_region()

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Introduce a helper function to handle the request_region() for legacy
comedi drivers.

As pointed out by Ian Abbott, legacy devices are configured manually
with the "comedi_config" program. The error messages are useful
diagnostics when trying to attach to these boards.

Providing a helper function allows consolidating the error messages
in the drivers and providing a consistent format for the errors.

This helper also sets the dev->iobase automatically for the driver
if the request_region() is successful.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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H Hartley Sweeten 2013-04-09 16:05:54 -07:00 • committed by Greg Kroah-Hartman

parent aa7a82b9f9

commit f375ac5f19

2 changed files with 30 additions and 0 deletions

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3

drivers/staging/comedi/comedidev.h

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27

drivers/staging/comedi/drivers.c

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