dt-bindings: leds: lp5860: add enable-gpio

The VIO_EN pin on the lp5860 can either be connected to VIO power supply
or GPIO.

Add the enable-gpios pin to the binding documentation.

Signed-off-by: Steffen Trumtrar <s.trumtrar@pengutronix.de>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://patch.msgid.link/20260217-v6-19-topic-ti-lp5860-enable-gpio-v1-1-f5e8edeb5d74@pengutronix.de
Signed-off-by: Lee Jones <lee@kernel.org>

Documentation/devicetree/bindings/leds/leds-lp5860.yaml

@@ -33,6 +33,11 @@ properties:
   '#size-cells':
     const: 0
 
+  enable-gpios:
+    maxItems: 1
+    description: |
+      GPIO attached to the chip's enable pin (VIO_EN).
+
 patternProperties:
   '^multi-led@[0-9a-f]+$':
     type: object
@@ -74,6 +79,7 @@ unevaluatedProperties: false
 
 examples:
   - |
+    #include <dt-bindings/gpio/gpio.h>
     #include <dt-bindings/leds/common.h>
 
     spi {
@@ -83,6 +89,7 @@ examples:
         led-controller@0 {
             compatible = "ti,lp5860";
             reg = <0x0>;
+            enable-gpios = <&gpio1 1 GPIO_ACTIVE_HIGH>;
             #address-cells = <1>;
             #size-cells = <0>;