[RFC 1/3] dt: bindings: Add a binding for flash devices associated to a sensor

[Sakari Ailus <sakari.ailus-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>]

Camera flash drivers (and LEDs) are separate from the sensor devices in
DT. In order to make an association between the two, provide the
association information to the software.

Signed-off-by: Sakari Ailus <sakari.ailus-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
---
 Documentation/devicetree/bindings/media/video-interfaces.txt | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/Documentation/devicetree/bindings/media/video-interfaces.txt b/Documentation/devicetree/bindings/media/video-interfaces.txt
index 9cd2a36..d6c62bc 100644
--- a/Documentation/devicetree/bindings/media/video-interfaces.txt
+++ b/Documentation/devicetree/bindings/media/video-interfaces.txt
@@ -67,6 +67,17 @@ are required in a relevant parent node:
 		    identifier, should be 1.
  - #size-cells    : should be zero.
 
+
+Optional properties
+-------------------
+
+- flash: An array of phandles that refer to the flash light sources
+  related to an image sensor. These could be e.g. LEDs. In case the LED
+  driver drives more than a single LED, then the phandles here refer to
+  the child nodes of the LED driver describing individual LEDs. Only
+  valid for device nodes that are related to an image sensor.
+
+
 Optional endpoint properties
 ----------------------------
 
-- 
2.7.4

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