dt-bindings: reset: amlogic,meson-reset: convert to yaml

Now that we have the DT validation in place, let's convert the device tree
bindings for the Amlogic Reset controller over to a YAML schemas.
Reviewed-by: Rob Herring <robh@kernel.org>
Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/reset/amlogic,meson-reset.txt

-Amlogic Meson SoC Reset Controller
-=======================================
-
-Please also refer to reset.txt in this directory for common reset
-controller binding usage.
-
-Required properties:
-- compatible: Should be "amlogic,meson8b-reset", "amlogic,meson-gxbb-reset" or
-	"amlogic,meson-axg-reset".
-- reg: should contain the register address base
-- #reset-cells: 1, see below
-
-example:
-
-reset: reset-controller {
-	compatible = "amlogic,meson-gxbb-reset";
-	reg = <0x0 0x04404 0x0 0x20>;
-	#reset-cells = <1>;
-};

Documentation/devicetree/bindings/reset/amlogic,meson-reset.yaml

+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+# Copyright 2019 BayLibre, SAS
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/reset/amlogic,meson-reset.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: Amlogic Meson SoC Reset Controller
+
+maintainers:
+  - Neil Armstrong <narmstrong@baylibre.com>
+
+properties:
+  compatible:
+    enum:
+      - amlogic,meson8b-reset # Reset Controller on Meson8b and compatible SoCs
+      - amlogic,meson-gxbb-reset # Reset Controller on GXBB and compatible SoCs
+      - amlogic,meson-axg-reset # Reset Controller on AXG and compatible SoCs
+
+  reg:
+    maxItems: 1
+
+  "#reset-cells":
+    const: 1
+
+required:
+  - compatible
+  - reg
+  - "#reset-cells"
+
+examples:
+  - |
+    reset-controller@c884404 {
+          compatible = "amlogic,meson-gxbb-reset";
+          reg = <0xc884404 0x20>;
+          #reset-cells = <1>;
+    };