tree 8cf6f2f79033cfb98066606cb242ee6bf2a0763f
parent bca3a6d182b1deae02e5cbc05e727c75427e82ee
author H Hartley Sweeten <hsweeten@visionengravers.com> 1424906918 -0700
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1425264990 -0800

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>