staging: comedi: das1800: add analog output readback
authorH Hartley Sweeten <hsweeten@visionengravers.com>
Fri, 8 Apr 2016 19:41:47 +0000 (12:41 -0700)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Fri, 29 Apr 2016 05:16:10 +0000 (22:16 -0700)
commit750bca653d0efae236b07988c013485ccd0a5f22
tree1043e9ed6eb4cd77a92097f6e8863ec8613d8573
parenta5405cfa1b37ea2156abdbb589e06e29140844f4
staging: comedi: das1800: add analog output readback

Use the core provided readback support to allow reading back the last
value written to the analog output 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>
drivers/staging/comedi/drivers/das1800.c