[PATCH v6 18/19] dt-bindings: auxdisplay: ht16k33: Document LED subnode

[Geert Uytterhoeven <geert@linux-m68k.org>]

Extend the Holtek HT16K33 LED controller Device Tree bindings with an
LED subnode, conforming to the standard LED bindings.

This allows the user to exert more control, like specifying LED color,
function, and/or trigger, to extend LED functionality beyond a simple
display backlight.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Rob Herring <robh@kernel.org>
---
v6:
  - No changes,

v5:
  - No changes,

v4:
  - Add Reviewed-by,

v3:
  - New.
---
 .../bindings/auxdisplay/holtek,ht16k33.yaml           | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/Documentation/devicetree/bindings/auxdisplay/holtek,ht16k33.yaml b/Documentation/devicetree/bindings/auxdisplay/holtek,ht16k33.yaml
index 6baf1200c9d8488e..0f1414185fefc1a9 100644
--- a/Documentation/devicetree/bindings/auxdisplay/holtek,ht16k33.yaml
+++ b/Documentation/devicetree/bindings/auxdisplay/holtek,ht16k33.yaml
@@ -48,6 +48,11 @@ properties:
     default: 16
     description: Initial brightness level
 
+  led:
+    type: object
+    $ref: /schemas/leds/common.yaml#
+    unevaluatedProperties: false
+
 required:
   - compatible
   - reg
@@ -66,6 +71,7 @@ examples:
   - |
     #include <dt-bindings/interrupt-controller/irq.h>
     #include <dt-bindings/input/input.h>
+    #include <dt-bindings/leds/common.h>
     i2c1 {
             #address-cells = <1>;
             #size-cells = <0>;
@@ -87,5 +93,10 @@ examples:
                                    <MATRIX_KEY(4, 1, KEY_F9)>,
                                    <MATRIX_KEY(5, 1, KEY_F3)>,
                                    <MATRIX_KEY(6, 1, KEY_F1)>;
+
+                    led {
+                            color = <LED_COLOR_ID_RED>;
+                            function = LED_FUNCTION_BACKLIGHT;
+                    };
             };
       };
-- 
2.25.1