dt-bindings: input: touchscreen: Convert TS-4800 to DT schema

Convert the TS-4800 touchscreen bindings to DT schema.

Signed-off-by: Eduard Bostina <egbostina@gmail.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Link: https://patch.msgid.link/20260316181038.9771-1-egbostina@gmail.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

Documentation/devicetree/bindings/input/touchscreen/technologic,ts4800-ts.yaml

@@ -0,0 +1,42 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/input/touchscreen/technologic,ts4800-ts.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: TS-4800 Touchscreen
+
+maintainers:
+  - Eduard Bostina <egbostina@gmail.com>
+
+properties:
+  compatible:
+    const: technologic,ts4800-ts
+
+  reg:
+    maxItems: 1
+
+  syscon:
+    $ref: /schemas/types.yaml#/definitions/phandle-array
+    items:
+      - items:
+          - description: Phandle to the FPGA's syscon
+          - description: Offset to the touchscreen register
+          - description: Offset to the touchscreen enable bit
+    description: Phandle / integers array that points to the syscon node which
+      describes the FPGA's syscon registers.
+
+required:
+  - compatible
+  - reg
+  - syscon
+
+additionalProperties: false
+
+examples:
+  - |
+    touchscreen@1000 {
+        compatible = "technologic,ts4800-ts";
+        reg = <0x1000 0x100>;
+        syscon = <&fpga_syscon 0x20 3>;
+    };

Documentation/devicetree/bindings/input/touchscreen/ts4800-ts.txt

@@ -1,11 +0,0 @@
-* TS-4800 Touchscreen bindings
-
-Required properties:
-- compatible: must be "technologic,ts4800-ts"
-- reg: physical base address of the controller and length of memory mapped
-  region.
-- syscon: phandle / integers array that points to the syscon node which
-          describes the FPGA's syscon registers.
-          - phandle to FPGA's syscon
-          - offset to the touchscreen register
-          - offset to the touchscreen enable bit