iio: Add ABI documentation for illuminance
has been in use for a long time, but never documented;
state that this measurement should be in lux (drivers may feel
different about this)
Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
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 9669c1f..a9757dc 100644
--- a/Documentation/ABI/testing/sysfs-bus-iio
+++ b/Documentation/ABI/testing/sysfs-bus-iio
@@ -895,6 +895,15 @@
on-chip EEPROM. After power-up or chip reset the device will
automatically load the saved configuration.
+What: /sys/.../iio:deviceX/in_illuminanceY_input
+What: /sys/.../iio:deviceX/in_illuminanceY_raw
+What: /sys/.../iio:deviceX/in_illuminanceY_mean_raw
+KernelVersion: 3.4
+Contact: linux-iio@vger.kernel.org
+Description:
+ Illuminance measurement, units after application of scale
+ and offset are lux.
+
What: /sys/.../iio:deviceX/in_intensityY_raw
What: /sys/.../iio:deviceX/in_intensityY_ir_raw
What: /sys/.../iio:deviceX/in_intensityY_both_raw