From: H Hartley Sweeten <hsweeten@visionengravers.com>
Date: Wed, 25 Feb 2015 23:28:38 +0000 (-0700)
Subject: staging: comedi: cb_pcimdas: fix analog input channel configuration
X-Git-Tag: omap-for-v4.2/o2_dc~155^2~138^2~715
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=532a411e8b54418c2aed9e20f02b359002bb7e44;p=pandora-kernel.git

staging: comedi: cb_pcimdas: fix analog input channel configuration

The hardware uses a switch on the board to set the number of analog
input channels to either 16 single-ended or 8 differential channels.
Currently the switch setting is checked for every (*insn_read) operation
to validate the channel number.

Check the switch setting during the driver attach and initialize the
subdevice accordingly. This allows the core to handle the validation.

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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