iio: Support linux Industrial I/O (iio) #45
Description
Ported from google/periph#167.
See documentation at https://www.kernel.org/doc/html/v4.12/driver-api/iio/core.html#iio-device-sysfs-interface.
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Ported from google/periph#167.
See documentation at https://www.kernel.org/doc/html/v4.12/driver-api/iio/core.html#iio-device-sysfs-interface.