[dt-schema PATCH] schemas: iio: add label

[Krzysztof Kozlowski]

Linux IIO core code parses label property which is already used in
several IIO devices.

Signed-off-by: Krzysztof Kozlowski <krzk@xxxxxxxxxx>
---
 dtschema/schemas/iio/iio.yaml | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/dtschema/schemas/iio/iio.yaml b/dtschema/schemas/iio/iio.yaml
index 5ce5e147aef1..727ca0f9afec 100644
--- a/dtschema/schemas/iio/iio.yaml
+++ b/dtschema/schemas/iio/iio.yaml
@@ -30,6 +30,10 @@ properties:
       with a single IIO output and 1 for nodes with multiple IIO outputs.
       A few unusual devices have a 2 level mapping.
 
+  label:
+    description:
+      Unique name to identify which IIO channel or device this is.
+
   mount-matrix:
     $ref: /schemas/types.yaml#/definitions/non-unique-string-array
     minItems: 9
-- 
2.34.1