From: H Hartley Sweeten <hsweeten@visionengravers.com>
Date: Fri, 20 Jun 2014 20:12:38 +0000 (-0700)
Subject: staging: comedi: dt282x: convert 'dabits' boardinfo to 'ao_maxdata'
X-Git-Tag: omap-for-v3.17/fixes-against-rc2~166^2~1547
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=58c8c47fda4aa37ec946ff7ad1a42b875b03da74;p=pandora-kernel.git

staging: comedi: dt282x: convert 'dabits' boardinfo to 'ao_maxdata'

This member of the boardinfo is the number of bits in the analog output data.
Convert this member into the subdevice 'maxdata', (1 << board->dabits) - 1,
to avoid needing to do the calculation.

Use the subdevice 'maxdata' in the driver instead of using the boardinfo and
use the comedi_offset_munge() helper to convert the two's complement data to
the offset binary form that the comedi core expects.

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