[PATCH 5/6] dt-bindings: input: zinitix: Document touch-keys support

[Nikita Travkin]

In some configrations the touch controller can support the touch-keys.
Doucument the linux,keycodes property that enables those keys and
specifies the keycodes that should be used to report the key events.

Signed-off-by: Nikita Travkin <nikita@xxxxxxx>
---
 .../bindings/input/touchscreen/zinitix,bt400.yaml         | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/Documentation/devicetree/bindings/input/touchscreen/zinitix,bt400.yaml b/Documentation/devicetree/bindings/input/touchscreen/zinitix,bt400.yaml
index b4e5ba7c0b49..40b243c07fd4 100644
--- a/Documentation/devicetree/bindings/input/touchscreen/zinitix,bt400.yaml
+++ b/Documentation/devicetree/bindings/input/touchscreen/zinitix,bt400.yaml
@@ -79,6 +79,14 @@ properties:
     $ref: /schemas/types.yaml#/definitions/uint32
     enum: [1, 2]
 
+  linux,keycodes:
+    description: |
+      This property specifies an array of keycodes assigned to the
+      touch-keys that can be present in some touchscreen configurations.
+    $ref: /schemas/input/input.yaml#/properties/linux,keycodes
+    minItems: 1
+    maxItems: 8
+
   touchscreen-size-x: true
   touchscreen-size-y: true
   touchscreen-fuzz-x: true
-- 
2.30.2