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iio: Implement counter channel type and info constants

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Quadrature encoders, such as rotary encoders and linear encoders, are
devices which are capable of encoding the relative position and
direction of motion of a shaft. This patch introduces several IIO
constants for supporting quadrature encoder counter devices.

  IIO_COUNT: Current count (main data provided by the counter device)
  IIO_INDEX: Counter device index value

Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
William Breathitt Gray 2016-09-28 13:59:49 -04:00 • committed by Jonathan Cameron
parent 9ecca12edd
commit 1a8f324aa1
3 changed files with 22 additions and 0 deletions
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2
include/uapi/linux/iio/types.h
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@ -40,6 +40,8 @@ enum iio_chan_type {
IIO_PH,
IIO_UVINDEX,
IIO_ELECTRICALCONDUCTIVITY,
IIO_COUNT,
IIO_INDEX,
};
enum iio_modifier {