dt-bindings: touchscreen: convert zet6223 bindings to json schema

Convert Zeitec ZET6223 touchscreen controller device tree binding to
json-schema.

Signed-off-by: Dario Binacchi <[e-mail]>
Reviewed-by: Rob Herring (Arm) <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Dmitry Torokhov <[e-mail]>

Documentation/devicetree/bindings/input/touchscreen/zeitec,zet6223.yaml

···
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/input/touchscreen/zeitec,zet6223.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Zeitec ZET6223 touchscreen controller
+
+description:
+  Zeitec ZET6223 I2C driven touchscreen controller.
+
+maintainers:
+  - Dario Binacchi <[e-mail]>
+
+allOf:
+  - $ref: touchscreen.yaml#
+
+properties:
+  compatible:
+    enum:
+      - zeitec,zet6223
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  vio-supply:
+    description: 1.8V or 3.3V VIO supply.
+
+  vcc-supply:
+    description: 3.3V VCC supply.
+
+  touchscreen-inverted-x: true
+  touchscreen-inverted-y: true
+  touchscreen-size-x: true
+  touchscreen-size-y: true
+  touchscreen-swapped-x-y: true
+
+additionalProperties: false
+
+required:
+  - compatible
+  - reg
+  - interrupts
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        touchscreen@76 {
+            compatible = "zeitec,zet6223";
+            reg = <0x76>;
+            interrupt-parent = <&pio>;
+            interrupts = <6 11 IRQ_TYPE_EDGE_FALLING>;
+        };
+    };

Documentation/devicetree/bindings/input/touchscreen/zet6223.txt

···
-Zeitec ZET6223 I2C touchscreen controller
-
-Required properties:
-- compatible		  : "zeitec,zet6223"
-- reg			  : I2C slave address of the chip (0x76)
-- interrupts		  : interrupt specification for the zet6223 interrupt
-
-Optional properties:
-
-- vio-supply		  : Specification for VIO supply (1.8V or 3.3V,
-			    depending on system interface needs).
-- vcc-supply		  : Specification for 3.3V VCC supply.
-- touchscreen-size-x	  : See touchscreen.txt
-- touchscreen-size-y	  : See touchscreen.txt
-- touchscreen-inverted-x  : See touchscreen.txt
-- touchscreen-inverted-y  : See touchscreen.txt
-- touchscreen-swapped-x-y : See touchscreen.txt
-
-Example:
-
-i2c@00000000 {
-
-	zet6223: touchscreen@76 {
-		compatible = "zeitec,zet6223";
-		reg = <0x76>;
-		interrupt-parent = <&pio>;
-		interrupts = <6 11 IRQ_TYPE_EDGE_FALLING>
-	};
-
-};