dt-bindings: soc: amlogic: canvas: convert to yaml

Now that we have the DT validation in place, let's convert the device tree
bindings for the Amlogic Canvas over to a YAML schemas.

Cc: Maxime Jourdan <[e-mail]>
Signed-off-by: Neil Armstrong <[e-mail]>
Reviewed-by: Martin Blumenstingl <[e-mail]>
[robh: update title]
Signed-off-by: Rob Herring <[e-mail]>

Documentation/devicetree/bindings/soc/amlogic/amlogic,canvas.txt

···
-Amlogic Canvas
-================================
-
-A canvas is a collection of metadata that describes a pixel buffer.
-Those metadata include: width, height, phyaddr, wrapping and block mode.
-Starting with GXBB the endianness can also be described.
-
-Many IPs within Amlogic SoCs rely on canvas indexes to read/write pixel data
-rather than use the phy addresses directly. For instance, this is the case for
-the video decoders and the display.
-
-Amlogic SoCs have 256 canvas.
-
-Device Tree Bindings:
----------------------
-
-Video Lookup Table
---------------------------
-
-Required properties:
-- compatible: has to be one of:
-		- "amlogic,meson8-canvas", "amlogic,canvas" on Meson8
-		- "amlogic,meson8b-canvas", "amlogic,canvas" on Meson8b
-		- "amlogic,meson8m2-canvas", "amlogic,canvas" on Meson8m2
-		- "amlogic,canvas" on GXBB and newer
-- reg: Base physical address and size of the canvas registers.
-
-Example:
-
-canvas: video-lut@48 {
-	compatible = "amlogic,canvas";
-	reg = <0x0 0x48 0x0 0x14>;
-};

Documentation/devicetree/bindings/soc/amlogic/amlogic,canvas.yaml

···
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+# Copyright 2019 BayLibre, SAS
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/soc/amlogic/amlogic,canvas.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: Amlogic Canvas Video Lookup Table
+
+maintainers:
+  - Neil Armstrong <[e-mail]>
+  - Maxime Jourdan <[e-mail]>
+
+description: |
+  A canvas is a collection of metadata that describes a pixel buffer.
+  Those metadata include: width, height, phyaddr, wrapping and block mode.
+  Starting with GXBB the endianness can also be described.
+
+  Many IPs within Amlogic SoCs rely on canvas indexes to read/write pixel data
+  rather than use the phy addresses directly. For instance, this is the case for
+  the video decoders and the display.
+
+  Amlogic SoCs have 256 canvas.
+
+properties:
+  compatible:
+    oneOf:
+      - items:
+        - enum:
+          - amlogic,meson8-canvas
+          - amlogic,meson8b-canvas
+          - amlogic,meson8m2-canvas
+        - const: amlogic,canvas
+      - const: amlogic,canvas # GXBB and newer SoCs
+
+  reg:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+
+examples:
+  - |
+    canvas: video-lut@48 {
+        compatible = "amlogic,canvas";
+        reg = <0x48 0x14>;
+    };
+