dt-bindings: gpio: Convert cavium,octeon-3860-gpio to DT schema

Convert the Cavium Octeon 3860 GPIO binding to DT schema format. It's a
straight forward conversion.

Looks like Octeon has no maintainers, so Bartosz is listed.

Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://lore.kernel.org/r/20250714202927.3012974-1-robh@kernel.org
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

Documentation/devicetree/bindings/gpio/cavium,octeon-3860-gpio.yaml

@@ -0,0 +1,62 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/cavium,octeon-3860-gpio.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Cavium Octeon 3860 GPIO controller
+
+maintainers:
+  - Bartosz Golaszewski <brgl@bgdev.pl>
+
+properties:
+  compatible:
+    const: cavium,octeon-3860-gpio
+
+  reg:
+    maxItems: 1
+
+  gpio-controller: true
+
+  '#gpio-cells':
+    const: 2
+
+  interrupt-controller: true
+
+  '#interrupt-cells':
+    const: 2
+
+  interrupts:
+    maxItems: 16
+
+required:
+  - compatible
+  - reg
+  - gpio-controller
+  - '#gpio-cells'
+  - interrupt-controller
+  - '#interrupt-cells'
+  - interrupts
+
+additionalProperties: false
+
+examples:
+  - |
+    bus {
+        #address-cells = <2>;
+        #size-cells = <2>;
+
+        gpio@1070000000800 {
+            compatible = "cavium,octeon-3860-gpio";
+            reg = <0x10700 0x00000800 0x0 0x100>;
+            gpio-controller;
+            #gpio-cells = <2>;
+            interrupt-controller;
+            #interrupt-cells = <2>;
+            /* The GPIO pin connect to 16 consecutive CUI bits */
+            interrupts = <0 16>, <0 17>, <0 18>, <0 19>,
+                        <0 20>, <0 21>, <0 22>, <0 23>,
+                        <0 24>, <0 25>, <0 26>, <0 27>,
+                        <0 28>, <0 29>, <0 30>, <0 31>;
+        };
+    };

Documentation/devicetree/bindings/gpio/cavium-octeon-gpio.txt

@@ -1,49 +0,0 @@
-* General Purpose Input Output (GPIO) bus.
-
-Properties:
-- compatible: "cavium,octeon-3860-gpio"
-
-  Compatibility with all cn3XXX, cn5XXX and cn6XXX SOCs.
-
-- reg: The base address of the GPIO unit's register bank.
-
-- gpio-controller: This is a GPIO controller.
-
-- #gpio-cells: Must be <2>.  The first cell is the GPIO pin.
-
-- interrupt-controller: The GPIO controller is also an interrupt
-  controller, many of its pins may be configured as an interrupt
-  source.
-
-- #interrupt-cells: Must be <2>.  The first cell is the GPIO pin
-   connected to the interrupt source.  The second cell is the interrupt
-   triggering protocol and may have one of four values:
-   1 - edge triggered on the rising edge.
-   2 - edge triggered on the falling edge
-   4 - level triggered active high.
-   8 - level triggered active low.
-
-- interrupts: Interrupt routing for each pin.
-
-Example:
-
-	gpio-controller@1070000000800 {
-		#gpio-cells = <2>;
-		compatible = "cavium,octeon-3860-gpio";
-		reg = <0x10700 0x00000800 0x0 0x100>;
-		gpio-controller;
-		/* Interrupts are specified by two parts:
-		 * 1) GPIO pin number (0..15)
-		 * 2) Triggering (1 - edge rising
-		 *		  2 - edge falling
-		 *		  4 - level active high
-		 *		  8 - level active low)
-		 */
-		interrupt-controller;
-		#interrupt-cells = <2>;
-		/* The GPIO pin connect to 16 consecutive CUI bits */
-		interrupts = <0 16>, <0 17>, <0 18>, <0 19>,
-			     <0 20>, <0 21>, <0 22>, <0 23>,
-			     <0 24>, <0 25>, <0 26>, <0 27>,
-			     <0 28>, <0 29>, <0 30>, <0 31>;
-	};