diff --git a/Documentation/ABI/testing/sysfs-bus-iio b/Documentation/ABI/testing/sysfs-bus-iio
index 0890bd113eeaad12f6e4b4eedd9fc3928c897f17..c42fe980f395ad082b9800891f996c91fec93891 100644
--- a/Documentation/ABI/testing/sysfs-bus-iio
+++ b/Documentation/ABI/testing/sysfs-bus-iio
@@ -33,6 +33,45 @@ Description:
 		Description of the physical chip / device for device X.
 		Typically a part number.
 
+What:		/sys/bus/iio/devices/iio:deviceX/label
+KernelVersion:	5.8
+Contact:	linux-iio@vger.kernel.org
+Description:
+		Optional symbolic label for a device.
+		This is useful for userspace to be able to better identify an
+		individual device.
+
+		The contents of the label are free-form, but there are some
+		standardized uses:
+
+		For proximity sensors which give the proximity (of a person) to
+		a certain wlan or wwan antenna the following standardized labels
+		are used:
+
+		* "proximity-wifi"
+		* "proximity-lte"
+		* "proximity-wifi-lte"
+		* "proximity-wifi-left"
+		* "proximity-wifi-right"
+
+		These are used to indicate to userspace that these proximity
+		sensors may be used to tune transmit power to ensure that
+		Specific Absorption Rate (SAR) limits are honored.
+		The "-left" and "-right" labels are for devices with multiple
+		antennas.
+
+		In some laptops/tablets the standardized proximity sensor labels
+		instead	indicate proximity to a specific part of the device:
+
+		* "proximity-palmrest" indicates proximity to the keyboard's palmrest
+		* "proximity-palmrest-left" indicates proximity to the left part of the palmrest
+		* "proximity-palmrest-right" indicates proximity to the right part of the palmrest
+		* "proximity-lap" indicates the device is being used on someone's lap
+
+		Note "proximity-lap" is special in that its value may be
+		calculated by firmware from other sensor readings, rather then
+		being a raw sensor reading.
+
 What:		/sys/bus/iio/devices/iio:deviceX/current_timestamp_clock
 KernelVersion:	4.5
 Contact:	linux-iio@vger.kernel.org