dt-bindings: input: exc3000: move eeti,egalax_ts from egalax-ts.txt to eeti,exc3000.yaml

Remove legacy binding egalax-ts.txt file. And add compatible string
eeti,egalax_ts and wakeup-gpios to eeti,exc3000.yaml. "eeti,egalax_ts" is
general compatible string, which is not preferred. But it is compatible
with old devices (older than 10 years) and existing driver in
drivers/input/touchscreen/egalax_ts.c.

Allow address 0x4 for eeti,egalax_ts.

Don't require touchscreen-size-x(y) for eeti,egalax_ts.

Keep the same restriction for existing compatible string.

Fix below DTB_CHECKS warnings:
arch/arm/boot/dts/nxp/imx/imx6dl-gw52xx.dtb: /soc/bus@2100000/i2c@21a8000/egalax_ts@4: failed to match any schema with compatible: ['eeti,egalax_ts']

Signed-off-by: Frank Li <Frank.Li@nxp.com>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://lore.kernel.org/r/20250904171543.517650-1-Frank.Li@nxp.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

Documentation/devicetree/bindings/input/touchscreen/eeti,exc3000.yaml

@@ -9,25 +9,25 @@ title: EETI EXC3000 series touchscreen controller
 maintainers:
   - Dmitry Torokhov <dmitry.torokhov@gmail.com>
 
-allOf:
-  - $ref: touchscreen.yaml#
-
 properties:
   compatible:
     oneOf:
       - const: eeti,exc3000
       - const: eeti,exc80h60
       - const: eeti,exc80h84
+      - const: eeti,egalax_ts # Do NOT use for new binding
       - items:
           - enum:
               - eeti,exc81w32
           - const: eeti,exc80h84
   reg:
-    const: 0x2a
+    enum: [0x4, 0x2a]
   interrupts:
     maxItems: 1
   reset-gpios:
     maxItems: 1
+  wakeup-gpios:
+    maxItems: 1
   vdd-supply:
     description: Power supply regulator for the chip
   touchscreen-size-x: true
@@ -40,11 +40,29 @@ required:
   - compatible
   - reg
   - interrupts
-  - touchscreen-size-x
-  - touchscreen-size-y
 
 additionalProperties: false
 
+allOf:
+  - $ref: touchscreen.yaml#
+
+  - if:
+      properties:
+        compatible:
+          not:
+            contains:
+              const: eeti,egalax_ts
+    then:
+      properties:
+        reg:
+          const: 0x2a
+
+        wakeup-gpios: false
+
+      required:
+        - touchscreen-size-x
+        - touchscreen-size-y
+
 examples:
   - |
     #include "dt-bindings/interrupt-controller/irq.h"

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

@@ -1,18 +0,0 @@
-* EETI eGalax Multiple Touch Controller
-
-Required properties:
-- compatible: must be "eeti,egalax_ts"
-- reg: i2c slave address
-- interrupts: touch controller interrupt
-- wakeup-gpios: the gpio pin to be used for waking up the controller
-  and also used as irq pin
-
-Example:
-
-	touchscreen@4 {
-		compatible = "eeti,egalax_ts";
-		reg = <0x04>;
-		interrupt-parent = <&gpio1>;
-		interrupts = <9 IRQ_TYPE_LEVEL_LOW>;
-		wakeup-gpios = <&gpio1 9 GPIO_ACTIVE_LOW>;
-	};