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This board supports two interrupt sources: VCC : detects when the external supply voltage drops below 5V CC : over temperature diagnostic Currently the interrupt support is tied into the digital output subdevice. It's also broken since it does not follow the comedi API. Create a new digital input subdevice to handle the interrupts. 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>