Some RJ-45 connectors have LEDs wired in the following way:
LED1
+--|>|--+
| |
A---+--|<|--+---B
LED2
With + on A and - on B, LED1 is ON and LED2 is OFF. Inverting the
polarity turns LED1 OFF and LED2 ON.
So these LEDs exclude each other.
Add new `excludes` property to the LED binding. The property is a
phandle-array to all the other LEDs that are excluded by this LED.
Signed-off-by: Marek Behún <kabel@xxxxxxxxxx>
---
Documentation/devicetree/bindings/leds/common.yaml | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/Documentation/devicetree/bindings/leds/common.yaml b/Documentation/devicetree/bindings/leds/common.yaml
index a19acc781e89..03759d2e125a 100644
--- a/Documentation/devicetree/bindings/leds/common.yaml
+++ b/Documentation/devicetree/bindings/leds/common.yaml
@@ -59,6 +59,14 @@ properties:
deprecated - use 'function' and 'color' properties instead.
function-enumerator has no effect when this property is present.
+ excludes:
+ description:
+ List of LEDs that are excluded by this LED: if this LED is ON, the others
+ must be OFF. This is mostly the case when there are two LEDs connected in
+ parallel, but inversely: inverting the polarity of the source turns one
+ LED ON while the other OFF. There are RJ-45 connectors with such wiring.
+ $ref: /schemas/types.yaml#/definitions/phandle-array
+
default-state:
description:
The initial state of the LED. If the LED is already on or off and the
--
2.32.0
