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-rw-r--r--Documentation/ABI/testing/sysfs-bus-iio7
1 files changed, 7 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-iio b/Documentation/ABI/testing/sysfs-bus-iio
index 8fadd272ad8a..80c6fce9935b 100644
--- a/Documentation/ABI/testing/sysfs-bus-iio
+++ b/Documentation/ABI/testing/sysfs-bus-iio
@@ -1493,3 +1493,10 @@ Description:
This ABI is especially applicable for humidity sensors
to heatup the device and get rid of any condensation
in some humidity environment
+
+What: /sys/bus/iio/devices/iio:deviceX/in_ph_raw
+KernelVersion: 4.5
+Contact: linux-iio@vger.kernel.org
+Description:
+ Raw (unscaled no offset etc.) pH reading of a substance as a negative
+ base-10 logarithm of hydrodium ions in a litre of water.