Add default-brightness property to leds/common.yaml to establish a single
canonical definition for LED brightness initialization.

The property is currently defined locally in leds/leds-pwm.yaml and is
needed by auxdisplay/titanmec,tm16xx.yaml. Properties should be defined
in only one location to avoid type inconsistencies across bindings.

Signed-off-by: Jean-François Lessard <jefflessard3@gmail.com>
---
 Documentation/devicetree/bindings/leds/common.yaml | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Documentation/devicetree/bindings/leds/common.yaml b/Documentation/devicetree/bindings/leds/common.yaml
index 3e8319e44339..96bd7fd0f053 100644
--- a/Documentation/devicetree/bindings/leds/common.yaml
+++ b/Documentation/devicetree/bindings/leds/common.yaml
@@ -173,6 +173,12 @@ properties:
       led-max-microamp.
     $ref: /schemas/types.yaml#/definitions/uint32
 
+  default-brightness:
+    description:
+      Brightness to be set if LED's default state is on. Used only during
+      initialization. If the option is not set then max brightness is used.
+    $ref: /schemas/types.yaml#/definitions/uint32
+
   panic-indicator:
     description:
       This property specifies that the LED should be used, if at all possible,
-- 
2.43.0