dt-bindings: usb: atmel,at91sam9rl-udc: convert to DT schema

Convert Atmel High-Speed USB Device Controller (USBA) binding to DT schema.
Changes during conversion:
- Make the "clock-names" property flexible enough to accept the items
  in any order as the existing in tree DTS nodes doesn't follow an order.

Signed-off-by: Charan Pedumuru <charan.pedumuru@gmail.com>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://patch.msgid.link/20260327-atmel-usb-v4-5-eb8b6e49b29d@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Author: Charan-Pedumuru

Documentation/devicetree/bindings/usb/atmel,at91sam9rl-udc.yaml

@@ -0,0 +1,74 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/usb/atmel,at91sam9rl-udc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Atmel High-Speed USB Device Controller (USBA)
+
+maintainers:
+  - Nicolas Ferre <nicolas.ferre@microchip.com>
+  - Alexandre Belloni <alexandre.belloni@bootlin.com>
+
+description:
+  The Atmel High-Speed USB Device Controller (USBA) provides USB 2.0
+  high-speed gadget functionality on several Atmel and Microchip SoCs.
+  The controller requires a peripheral clock and a host clock for operation
+  and may optionally use a GPIO to detect VBUS presence.
+
+properties:
+  compatible:
+    oneOf:
+      - enum:
+          - atmel,at91sam9rl-udc
+          - atmel,at91sam9g45-udc
+          - atmel,sama5d3-udc
+      - items:
+          - const: microchip,lan9662-udc
+          - const: atmel,sama5d3-udc
+      - const: microchip,sam9x60-udc
+
+  reg:
+    maxItems: 2
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 2
+
+  clock-names:
+    minItems: 2
+    maxItems: 2
+    items:
+      enum: [pclk, hclk]
+
+  atmel,vbus-gpio:
+    description: GPIO used to detect the presence of VBUS, indicating that
+      the USB cable is connected.
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - clock-names
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    #include <dt-bindings/clock/at91.h>
+    #include <dt-bindings/gpio/gpio.h>
+    gadget@fff78000 {
+        compatible = "atmel,at91sam9g45-udc";
+        reg = <0x00600000 0x80000
+               0xfff78000 0x400>;
+        interrupts = <27 IRQ_TYPE_LEVEL_HIGH 0>;
+        clocks = <&pmc PMC_TYPE_PERIPHERAL 27>, <&pmc PMC_TYPE_CORE PMC_UTMI>;
+        clock-names = "pclk", "hclk";
+        atmel,vbus-gpio = <&pioC 15 GPIO_ACTIVE_HIGH>;
+    };
+...