From c7f499bd03aa735d652e086762e48117d2b197b8 Mon Sep 17 00:00:00 2001
From: H Hartley Sweeten <hsweeten@visionengravers.com>
Date: Thu, 4 Sep 2014 12:14:18 -0700
Subject: [PATCH] staging: comedi: adl_pci9118: clarify the digital I/O
 register

The same register is used for both the digital inputs and outputs.
Reading the register returns the state of the 4 digtial input channels
and the 4 digital output channels. Writing to the register updates the
digital outputs.

Add some comments to clarify this and use a single define for the register.

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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Reading git-format-patch failed