staging: comedi: das08: Support read-back of AO subdevice

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Stash the last value written to each AO channel in private data and
support the INSN_READ instruction to read it back.  Don't bother setting
the SDF_READABLE subdevice flag though as the hardware isn't really
readable - we're just faking it.

Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Ian Abbott 2012-08-31 20:41:44 +01:00 • committed by Greg Kroah-Hartman

parent 8432eb35a9

commit f0ba1d6e19

2 changed files with 20 additions and 1 deletions

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drivers/staging/comedi/drivers/das08.c

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drivers/staging/comedi/drivers/das08.h

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