iio: Documentation: Add proximity unit

To follow iio guidelines Where possible we stick to the raw SI unit, so
specify meters for proximity.

Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

diff --git a/Documentation/ABI/testing/sysfs-bus-iio b/Documentation/ABI/testing/sysfs-bus-iio
index 8ec362bd5948bf57a4732b3738246dfc24378e88..530809ccfacf336710a40cf501401ccae0bb6ae4 100644 (file)
--- a/Documentation/ABI/testing/sysfs-bus-iio
+++ b/Documentation/ABI/testing/sysfs-bus-iio
@@ -1255,7 +1255,8 @@ Description:
                reflectivity of infrared or ultrasound emitted.
                Often these sensors are unit less and as such conversion
                to SI units is not possible. Higher proximity measurements
-               indicate closer objects, and vice versa.
+               indicate closer objects, and vice versa. Units after
+               application of scale and offset are meters.
 
 What:          /sys/.../iio:deviceX/in_illuminance_input
 What:          /sys/.../iio:deviceX/in_illuminance_raw