dt-bindings: interrupt-controller: Convert img,pdc-intc to DT schema

Convert the ImgTec Powerdown Controller (PDC) interrupt controller
binding to schema format. It's a straight-forward conversion of the
typical interrupt controller.

Link: https://lore.kernel.org/r/20250505144703.1289335-1-robh@kernel.org
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>

Author: robherring

Documentation/devicetree/bindings/interrupt-controller/img,pdc-intc.txt

@@ -0,0 +1,79 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/interrupt-controller/img,pdc-intc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: ImgTec Powerdown Controller (PDC) Interrupt Controller
+
+maintainers:
+  - James Hogan <jhogan@kernel.org>
+
+description:
+  ImgTec Powerdown Controller (PDC) Interrupt Controller has a number of input
+  interrupt lines which can wake the system, and are passed on through output
+  interrupt lines.
+
+properties:
+  compatible:
+    const: img,pdc-intc
+
+  reg:
+    maxItems: 1
+
+  interrupt-controller: true
+
+  '#interrupt-cells':
+    description: >
+      <1st-cell>: The interrupt-number that identifies the interrupt source.
+        0-7:  Peripheral interrupts
+        8-15: SysWake interrupts
+
+      <2nd-cell>: The level-sense information, encoded using the Linux interrupt
+        flags as follows (only 4 valid for peripheral interrupts):
+        0 = none (decided by software)
+        1 = low-to-high edge triggered
+        2 = high-to-low edge triggered
+        3 = both edge triggered
+        4 = active-high level-sensitive (required for perip irqs)
+        8 = active-low level-sensitive
+    const: 2
+
+  num-perips:
+    description: Number of waking peripherals
+    $ref: /schemas/types.yaml#/definitions/uint32
+    maximum: 8
+
+  num-syswakes:
+    description: Number of SysWake inputs
+    $ref: /schemas/types.yaml#/definitions/uint32
+    maximum: 8
+
+  interrupts:
+    description:
+      First entry is syswake IRQ. Subsequent entries are 1 per peripheral.
+    minItems: 2
+    maxItems: 9
+
+required:
+  - compatible
+  - reg
+  - interrupt-controller
+  - '#interrupt-cells'
+  - num-perips
+  - num-syswakes
+  - interrupts
+
+additionalProperties: false
+
+examples:
+  - |
+    interrupt-controller@2006000 {
+        compatible = "img,pdc-intc";
+        reg = <0x02006000 0x1000>;
+        interrupts = <18 4>, <30 4>, <29 4>, <31 4>;
+        interrupt-controller;
+        #interrupt-cells = <2>;
+        num-perips = <3>;
+        num-syswakes = <4>;
+    };