staging: comedi: adl_pci6208: split the digital i/o subdevice
The PCI-6208/6216 cards have 4 digital inputs and 4 digital outputs. These are currently being handled by an 8 channel COMEDI_SUBD_DIO subdevice in this driver. This causes the 4 digital outputs to appear as channels 0 thru 3 and the 4 digital inputs to appear as channels 4 thru 7. Userspace can only work out part thisby doing the COMEDI_INSNLIST ioctl with the INSN_CONFIG_DIO_QUERY instruction for each channel to determine the io direction. Make things a bit cleaner for userspace by creating two subdevices instead. One for the 4 digital inputs and one for the 4 digital outputs. For both subdevices the channel number indicates the actual digital input/output signal. Signed-off-by:H Hartley Sweeten <hsweeten@visionengravers.com> Cc: Ian Abbott <abbotti@mev.co.uk> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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