dt-bindings: display: imx: convert fsl,dcu.txt to yaml format

Convert fsl,dcu.txt to yaml format.

Additional changes:
- remove label in example.
- change node to display-controller in example.
- use 32bit address in example.
- add interrupts property.

Reviewed-by: Krzysztof Kozlowski <[e-mail]>
Signed-off-by: Frank Li <[e-mail]>
Reviewed-by: Stefan Agner <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Rob Herring (Arm) <[e-mail]>

Documentation/devicetree/bindings/display/fsl,dcu.txt

···
-Device Tree bindings for Freescale DCU DRM Driver
-
-Required properties:
-- compatible:		Should be one of
-	* "fsl,ls1021a-dcu".
-	* "fsl,vf610-dcu".
-
-- reg:			Address and length of the register set for dcu.
-- clocks:		Handle to "dcu" and "pix" clock (in the order below)
-			This can be the same clock (e.g. LS1021a)
-			See ../clocks/clock-bindings.txt for details.
-- clock-names:		Should be "dcu" and "pix"
-			See ../clocks/clock-bindings.txt for details.
-- big-endian		Boolean property, LS1021A DCU registers are big-endian.
-- port			Video port for the panel output
-
-Optional properties:
-- fsl,tcon:		The phandle to the timing controller node.
-
-Examples:
-dcu: dcu@2ce0000 {
-	compatible = "fsl,ls1021a-dcu";
-	reg = <0x0 0x2ce0000 0x0 0x10000>;
-	clocks = <&platform_clk 0>, <&platform_clk 0>;
-	clock-names = "dcu", "pix";
-	big-endian;
-	fsl,tcon = <&tcon>;
-
-	port {
-		dcu_out: endpoint {
-			remote-endpoint = <&panel_out>;
-	     };
-	};
-};

Documentation/devicetree/bindings/display/fsl,ls1021a-dcu.yaml

···
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/fsl,ls1021a-dcu.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Freescale DCU DRM Driver
+
+maintainers:
+  - Frank Li <[e-mail]>
+
+properties:
+  compatible:
+    enum:
+      - fsl,ls1021a-dcu
+      - fsl,vf610-dcu
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 2
+
+  clock-names:
+    items:
+      - const: dcu
+      - const: pix
+
+  big-endian: true
+
+  port:
+    $ref: /schemas/graph.yaml#/$defs/port-base
+    unevaluatedProperties: false
+    description: Video port for the panel output
+
+    properties:
+      endpoint:
+        $ref: /schemas/media/video-interfaces.yaml#
+        unevaluatedProperties: false
+
+  fsl,tcon:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description: The phandle to the timing controller node.
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - clock-names
+
+additionalProperties: false
+
+examples:
+  - |
+    display-controller@2ce0000 {
+        compatible = "fsl,ls1021a-dcu";
+        reg = <0x2ce0000 0x10000>;
+        clocks = <&platform_clk 0>, <&platform_clk 0>;
+        clock-names = "dcu", "pix";
+        big-endian;
+        fsl,tcon = <&tcon>;
+
+        port {
+            endpoint {
+                remote-endpoint = <&panel_out>;
+            };
+        };
+    };

MAINTAINERS

···
 L:	[e-mail]
 S:	Supported
 T:	git https://gitlab.freedesktop.org/drm/misc/kernel.git
-F:	Documentation/devicetree/bindings/display/fsl,dcu.txt
+F:	Documentation/devicetree/bindings/display/fsl,ls1021a-dcu.yaml
 F:	Documentation/devicetree/bindings/display/fsl,vf610-tcon.yaml
 F:	drivers/gpu/drm/fsl-dcu/