From: H Hartley Sweeten <hsweeten@visionengravers.com>
Date: Wed, 5 Aug 2015 17:45:19 +0000 (-0700)
Subject: staging: comedi: me4000: introduce me4000_ai_get_sample()
X-Git-Tag: omap-for-v4.3/fixes-merge-window~44^2~193
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7022781c460290687b374dab1c230c06091bba10;p=pandora-kernel.git

staging: comedi: me4000: introduce me4000_ai_get_sample()

The hardware returns two's complement values for the analog input
samples. These need to be converted to the unsigned binary format
that the comedi core expects. Introduce a helper function to handle
this.

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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