staging: comedi: adl_pci9118: clarify the digital I/O register

Browse source

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>

...

This commit is contained in:

H Hartley Sweeten 2014-09-04 12:14:18 -07:00 • committed by Greg Kroah-Hartman

parent 862be05ecf

commit c7f499bd03

1 changed files with 17 additions and 6 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

23

drivers/staging/comedi/drivers/adl_pci9118.c

View file