dt-bindings: input: touchscreen: st,stmfts: Introduce STM FTS5

Introduce more recent STM FTS5 touchscreen support.

Signed-off-by: David Heidelberg <david@ixit.cz>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>

Documentation/devicetree/bindings/input/touchscreen/st,stmfts.yaml

@@ -14,12 +14,11 @@ description:
   functionality. Along with it the user can enable the touchkey which can work
   as a basic HOME and BACK key for phones.
 
-allOf:
-  - $ref: touchscreen.yaml#
-
 properties:
   compatible:
-    const: st,stmfts
+    enum:
+      - st,stmfts
+      - st,stmfts5
 
   reg:
     maxItems: 1
@@ -40,6 +39,14 @@ properties:
   vdd-supply:
     description: Power supply
 
+  mode-switch-gpios:
+    description: Optional switch between touchscreen SLPI and AP mode.
+    maxItems: 1
+
+  reset-gpios:
+    description: Reset GPIO (active-low)
+    maxItems: 1
+
 required:
   - compatible
   - reg
@@ -47,6 +54,17 @@ required:
   - interrupts
   - vdd-supply
 
+allOf:
+  - $ref: touchscreen.yaml#
+  - if:
+      not:
+        properties:
+          compatible:
+            const: st,stmfts5
+    then:
+      properties:
+        mode-switch-gpios: false
+
 unevaluatedProperties: false
 
 examples: