dt-bindings: interrupt-controller: Convert ti,cp-intc to DT schema

Convert the TI Common Platform interrupt controller binding to schema
format. It's a straight-forward conversion of the typical interrupt
controller.

Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Link: https://lore.kernel.org/r/20250505144903.1293558-1-robh@kernel.org
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>

Documentation/devicetree/bindings/interrupt-controller/ti,cp-intc.txt

@@ -1,27 +0,0 @@
-* TI Common Platform Interrupt Controller
-
-Common Platform Interrupt Controller (cp_intc) is used on
-OMAP-L1x SoCs and can support several configurable number
-of interrupts.
-
-Main node required properties:
-
-- compatible : should be:
-	"ti,cp-intc"
-- interrupt-controller : Identifies the node as an interrupt controller
-- #interrupt-cells : Specifies the number of cells needed to encode an
-  interrupt source. The type shall be a <u32> and the value shall be 1.
-
-  The cell contains the interrupt number in the range [0-128].
-- ti,intc-size: Number of interrupts handled by the interrupt controller.
-- reg: physical base address and size of the intc registers map.
-
-Example:
-
-	intc: interrupt-controller@1 {
-		compatible = "ti,cp-intc";
-		interrupt-controller;
-		#interrupt-cells = <1>;
-		ti,intc-size = <101>;
-		reg = <0xfffee000 0x2000>;
-	};

Documentation/devicetree/bindings/interrupt-controller/ti,cp-intc.yaml

@@ -0,0 +1,50 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/interrupt-controller/ti,cp-intc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: TI Common Platform Interrupt Controller
+
+maintainers:
+  - Bartosz Golaszewski <brgl@bgdev.pl>
+  
+description:
+  Common Platform Interrupt Controller (cp_intc) is used on OMAP-L1x SoCs and
+  can support several configurable number of interrupts.
+
+properties:
+  compatible:
+    const: ti,cp-intc
+
+  reg:
+    maxItems: 1
+
+  interrupt-controller: true
+
+  '#interrupt-cells':
+    const: 1
+    description: Encodes an interrupt number in the range 0–128.
+
+  ti,intc-size:
+    description: Number of interrupts handled by the interrupt controller.
+    $ref: /schemas/types.yaml#/definitions/uint32
+
+required:
+  - compatible
+  - reg
+  - interrupt-controller
+  - '#interrupt-cells'
+  - ti,intc-size
+
+additionalProperties: false
+
+examples:
+  - |
+    interrupt-controller@fffee000 {
+        compatible = "ti,cp-intc";
+        reg = <0xfffee000 0x2000>;
+        interrupt-controller;
+        #interrupt-cells = <1>;
+        ti,intc-size = <101>;
+    };