dt-bindings: thermal: tegra186-bpmp: Convert to json-schema

Convert the Tegra186 (and later) BPMP thermal device tree bindings from
the free-form text format to json-schema.
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>

Documentation/devicetree/bindings/thermal/nvidia,tegra186-bpmp-thermal.txt

-NVIDIA Tegra186 BPMP thermal sensor
-
-In Tegra186, the BPMP (Boot and Power Management Processor) implements an
-interface that is used to read system temperatures, including CPU cluster
-and GPU temperatures. This binding describes the thermal sensor that is
-exposed by BPMP.
-
-The BPMP thermal node must be located directly inside the main BPMP node. See
-../firmware/nvidia,tegra186-bpmp.txt for details of the BPMP binding.
-
-This node represents a thermal sensor. See Documentation/devicetree/bindings/thermal/thermal-sensor.yaml for details of the
-core thermal binding.
-
-Required properties:
-- compatible:
-    Array of strings.
-    One of:
-    - "nvidia,tegra186-bpmp-thermal"
-    - "nvidia,tegra194-bpmp-thermal"
-- #thermal-sensor-cells: Cell for sensor index.
-    Single-cell integer.
-    Must be <1>.
-
-Example:
-
-bpmp {
-	...
-
-	bpmp_thermal: thermal {
-		compatible = "nvidia,tegra186-bpmp-thermal";
-		#thermal-sensor-cells = <1>;
-	};
-};

Documentation/devicetree/bindings/thermal/nvidia,tegra186-bpmp-thermal.yaml

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/thermal/nvidia,tegra186-bpmp-thermal.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NVIDIA Tegra186 (and later) BPMP thermal sensor
+
+maintainers:
+  - Thierry Reding <thierry.reding@gmail.com>
+  - Jon Hunter <jonathanh@nvidia.com>
+
+description: |
+  In Tegra186, the BPMP (Boot and Power Management Processor) implements
+  an interface that is used to read system temperatures, including CPU
+  cluster and GPU temperatures. This binding describes the thermal
+  sensor that is exposed by BPMP.
+
+  The BPMP thermal node must be located directly inside the main BPMP
+  node. See ../firmware/nvidia,tegra186-bpmp.yaml for details of the
+  BPMP binding.
+
+  This node represents a thermal sensor. See
+
+    Documentation/devicetree/bindings/thermal/thermal-sensor.yaml
+
+  for details of the core thermal binding.
+
+properties:
+  compatible:
+    enum:
+      - nvidia,tegra186-bpmp-thermal
+      - nvidia,tegra194-bpmp-thermal
+
+  '#thermal-sensor-cells':
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: Number of cells needed in the phandle specifier to
+      identify a given sensor. Must be 1 and the single cell specifies
+      the sensor index.
+    const: 1
+
+additionalProperties: false