staging: comedi: pcmmio: simplify pcmmio_dio_insn_bits()

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Currently this function uses the subdevice private data to get the
iobase address needed to update the dio output channel state and
read the current state of the input channels. This subdevice private
data is in the process of being removed.

Use the subdevice 'index' to determine the base 'port' needed to
access the correct digital i/o registers. The pcmmio_dio_write()
function can then be used to update the outputs.

Introduce a new helper function, pcmmio_dio_read(), to read the
current state of the input channels.

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 2013-12-09 15:31:01 -07:00 • committed by Greg Kroah-Hartman

parent 72c7692a9d

commit 0398606c18

1 changed files with 59 additions and 50 deletions

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drivers/staging/comedi/drivers/pcmmio.c

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