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2016-08-31iio: adc: add ADC12130/ADC12132/ADC12138 ADC driverAkinobu Mita
This adds Texas Instruments' ADC12130/ADC12132/ADC12138 12-bit plus sign ADC driver. I have tested with the ADC12138. The ADC12130 and ADC12132 are not tested but these are similar to ADC12138 except that the mode programming instruction is a bit different. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Acked-by: Rob Herring <robh@kernel.org> Cc: Jonathan Cameron <jic23@kernel.org> Cc: Hartmut Knaack <knaack.h@gmx.de> Cc: Lars-Peter Clausen <lars@metafoo.de> Cc: Peter Meerwald <pmeerw@pmeerw.net> Signed-off-by: Jonathan Cameron <jic23@kernel.org>