[PATCH v4 1/8] dt-bindings: iio: adc: Add reference-sources property

[David Lechner]

From: Kurt Borja <kuurtb@xxxxxxxxx>

Some ADCs have configurable voltage reference sources for each channel.

Signed-off-by: Kurt Borja <kuurtb@xxxxxxxxx>
Acked-by: Conor Dooley <conor.dooley@xxxxxxxxxxxxx>
Signed-off-by: David Lechner (TI) <dlechner@xxxxxxxxxxxx>
---
v3 changes:
* Removed minItems.

v2 changes (compared to Kurt's RFC v2):
* Drop maxItems.
* Drop 2nd paragraph of description.
* Make reference-sources plural since it is an array.
---
 Documentation/devicetree/bindings/iio/adc/adc.yaml | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Documentation/devicetree/bindings/iio/adc/adc.yaml b/Documentation/devicetree/bindings/iio/adc/adc.yaml
index b9bc02b5b07a..8f608bf0b24d 100644
--- a/Documentation/devicetree/bindings/iio/adc/adc.yaml
+++ b/Documentation/devicetree/bindings/iio/adc/adc.yaml
@@ -73,6 +73,13 @@ properties:
       device design and can interact with other characteristics such as
       settling time.
 
+  reference-sources:
+    $ref: /schemas/types.yaml#/definitions/string-array
+    description:
+      Indicates the voltage reference source or sources for this channel. Some
+      ADCs usually allow choosing between internal reference sources or a pair
+      of external pins.
+
 anyOf:
   - oneOf:
       - required:

-- 
2.43.0