staging: comedi: pcmuio: cleanup DIO subdevice (*insn_{bits,config})
Use the pcmuio_{read,write}() helpers to read/write all 24 channels instead of handling the digital I/O as three separate ports. This simplifies both functions with minimal overhead. Signed-off-by: NH Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: NIan Abbott <abbotti@mev.co.uk> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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