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

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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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H Hartley Sweeten 2014-06-20 13:12:38 -07:00 • committed by Greg Kroah-Hartman

parent d839495b64

commit 58c8c47fda

1 changed files with 15 additions and 16 deletions

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drivers/staging/comedi/drivers/dt282x.c

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