From: H Hartley Sweeten <hsweeten@visionengravers.com>
Date: Tue, 9 Apr 2013 23:05:54 +0000 (-0700)
Subject: staging: comedi: drivers: introduce comedi_request_region()
X-Git-Tag: omap-for-v3.10/dt-fixes-for-merge-window~137^2~183
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f375ac5f197d32aeffe5436e5864525cc14ce44a;p=pandora-kernel.git

staging: comedi: drivers: introduce comedi_request_region()

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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