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iio: ABI: Clarify proximity output value 

Current description for proximity measurement is ambiguous. While
the first part says that proximity is measured by observing
reflectivity, the second part incorrectly infers that reported values
should behave like a distance.

This is because of AS3935 lightning sensor which uses the proximity
API, while not being a true proximity sensor.

Note this is marked for stable as it accompanies a fix in ABI usage
to the sx9500 driver which would otherwise appear to be correct.

Fixes:  614e8842dd ("iio: ABI: add clarification for proximity")
Signed-off-by: Daniel Baluta <daniel.baluta@intel.com>
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Daniel Baluta 2015-06-11 18:49:33 +03:00 committed by Jonathan Cameron
parent 6a3c45bb5a
commit bdc10d57f2
1 changed files with 2 additions and 4 deletions
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Documentation/ABI/testing/sysfs-bus-iio
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@ -1165,10 +1165,8 @@ Description:
object is near the sensor, usually be observing object is near the sensor, usually be observing
reflectivity of infrared or ultrasound emitted. reflectivity of infrared or ultrasound emitted.
Often these sensors are unit less and as such conversion Often these sensors are unit less and as such conversion
to SI units is not possible. Where it is, the units should to SI units is not possible. Higher proximity measurements
be meters. If such a conversion is not possible, the reported indicate closer objects, and vice versa.
values should behave in the same way as a distance, i.e. lower
values indicate something is closer to the sensor.
What: /sys/.../iio:deviceX/in_illuminance_input What: /sys/.../iio:deviceX/in_illuminance_input
What: /sys/.../iio:deviceX/in_illuminance_raw What: /sys/.../iio:deviceX/in_illuminance_raw