dt-bindings: i2c: tegra-bpmp: Convert to json-schema

Convert the NVIDIA Tegra186 (and later) BPMP I2C bindings from the
free-form text format to json-schema.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://lore.kernel.org/r/20211208143306.534700-1-thierry.reding@gmail.comSigned-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/i2c/nvidia,tegra186-bpmp-i2c.txt

-NVIDIA Tegra186 BPMP I2C controller
-
-In Tegra186, the BPMP (Boot and Power Management Processor) owns certain HW
-devices, such as the I2C controller for the power management I2C bus. Software
-running on other CPUs must perform IPC to the BPMP in order to execute
-transactions on that I2C bus. This binding describes an I2C bus that is
-accessed in such a fashion.
-
-The BPMP I2C 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 an I2C controller. See ../i2c/i2c.txt for details of the
-core I2C binding.
-
-Required properties:
-- compatible:
-    Array of strings.
-    One of:
-    - "nvidia,tegra186-bpmp-i2c".
-- #address-cells: Address cells for I2C device address.
-    Single-cell integer.
-    Must be <1>.
-- #size-cells:
-    Single-cell integer.
-    Must be <0>.
-- nvidia,bpmp-bus-id:
-    Single-cell integer.
-    Indicates the I2C bus number this DT node represent, as defined by the
-    BPMP firmware.
-
-Example:
-
-bpmp {
-	...
-
-	i2c {
-		compatible = "nvidia,tegra186-bpmp-i2c";
-		#address-cells = <1>;
-		#size-cells = <0>;
-		nvidia,bpmp-bus-id = <5>;
-	};
-};

Documentation/devicetree/bindings/i2c/nvidia,tegra186-bpmp-i2c.yaml

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i2c/nvidia,tegra186-bpmp-i2c.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NVIDIA Tegra186 (and later) BPMP I2C controller
+
+maintainers:
+  - Thierry Reding <thierry.reding@gmail.com>
+  - Jon Hunter <jonathanh@nvidia.com>
+
+description: |
+  In Tegra186 and later, the BPMP (Boot and Power Management Processor)
+  owns certain HW devices, such as the I2C controller for the power
+  management I2C bus. Software running on other CPUs must perform IPC to
+  the BPMP in order to execute transactions on that I2C bus. This
+  binding describes an I2C bus that is accessed in such a fashion.
+
+  The BPMP I2C 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 an I2C controller. See ../i2c/i2c.txt for details
+  of the core I2C binding.
+
+properties:
+  compatible:
+    const: nvidia,tegra186-bpmp-i2c
+
+  nvidia,bpmp-bus-id:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: Indicates the I2C bus number this DT node represents,
+      as defined by the BPMP firmware.
+
+allOf:
+  - $ref: /schemas/i2c/i2c-controller.yaml
+
+unevaluatedProperties: false
+
+required:
+  - compatible
+  - "#address-cells"
+  - "#size-cells"
+  - nvidia,bpmp-bus-id