iio: adc: Add viperboard adc driver
This adds the mfd cell to use the adc part of the Nano River Technologies
viperboard.
Signed-off-by: Lars Poeschel <poeschel@lemonage.de>
Reviewed-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
diff --git a/include/linux/mfd/viperboard.h b/include/linux/mfd/viperboard.h
index ef78514..1934528 100644
--- a/include/linux/mfd/viperboard.h
+++ b/include/linux/mfd/viperboard.h
@@ -46,6 +46,7 @@
#define VPRBRD_USB_REQUEST_I2C 0xe9
#define VPRBRD_USB_REQUEST_MAJOR 0xea
#define VPRBRD_USB_REQUEST_MINOR 0xeb
+#define VPRBRD_USB_REQUEST_ADC 0xec
#define VPRBRD_USB_REQUEST_GPIOA 0xed
#define VPRBRD_USB_REQUEST_GPIOB 0xdd