dt-bindings: thermal: Add YAML schema for sun8i-thermal driver bindings

sun8i-thermal driver supports thermal sensor in wide range of Allwinner
SoCs. Add YAML schema for its bindings.
Signed-off-by: Yangtao Li <tiny.windzz@gmail.com>
Signed-off-by: Vasily Khoruzhick <anarsoul@gmail.com>
Acked-by: Maxime Ripard <mripard@kernel.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20191219172823.1652600-3-anarsoul@gmail.com

Documentation/devicetree/bindings/thermal/allwinner,sun8i-a83t-ths.yaml

+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/thermal/allwinner,sun8i-a83t-ths.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Allwinner SUN8I Thermal Controller Device Tree Bindings
+
+maintainers:
+  - Vasily Khoruzhick <anarsoul@gmail.com>
+  - Yangtao Li <tiny.windzz@gmail.com>
+
+properties:
+  compatible:
+    enum:
+      - allwinner,sun8i-a83t-ths
+      - allwinner,sun8i-h3-ths
+      - allwinner,sun8i-r40-ths
+      - allwinner,sun50i-a64-ths
+      - allwinner,sun50i-h5-ths
+      - allwinner,sun50i-h6-ths
+
+  clocks:
+    minItems: 1
+    maxItems: 2
+    items:
+      - description: Bus Clock
+      - description: Module Clock
+
+  clock-names:
+    minItems: 1
+    maxItems: 2
+    items:
+      - const: bus
+      - const: mod
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  resets:
+    maxItems: 1
+
+  nvmem-cells:
+    maxItems: 1
+    description: Calibration data for thermal sensors
+
+  nvmem-cell-names:
+    const: calibration
+
+  # See ./thermal.txt for details
+  "#thermal-sensor-cells":
+    enum:
+      - 0
+      - 1
+
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: allwinner,sun50i-h6-ths
+
+    then:
+      properties:
+        clocks:
+          maxItems: 1
+
+        clock-names:
+          maxItems: 1
+
+    else:
+      properties:
+        clocks:
+          minItems: 2
+
+        clock-names:
+          minItems: 2
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: allwinner,sun8i-h3-ths
+
+    then:
+      properties:
+        "#thermal-sensor-cells":
+          const: 0
+
+    else:
+      properties:
+        "#thermal-sensor-cells":
+          const: 1
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - const: allwinner,sun8i-h3-ths
+              - const: allwinner,sun8i-r40-ths
+              - const: allwinner,sun50i-a64-ths
+              - const: allwinner,sun50i-h5-ths
+              - const: allwinner,sun50i-h6-ths
+
+    then:
+      required:
+        - clocks
+        - clock-names
+        - resets
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - '#thermal-sensor-cells'
+
+additionalProperties: false
+
+examples:
+  - |
+    thermal-sensor@1f04000 {
+         compatible = "allwinner,sun8i-a83t-ths";
+         reg = <0x01f04000 0x100>;
+         interrupts = <0 31 0>;
+         nvmem-cells = <&ths_calibration>;
+         nvmem-cell-names = "calibration";
+         #thermal-sensor-cells = <1>;
+    };
+
+  - |
+    thermal-sensor@1c25000 {
+         compatible = "allwinner,sun8i-h3-ths";
+         reg = <0x01c25000 0x400>;
+         clocks = <&ccu 0>, <&ccu 1>;
+         clock-names = "bus", "mod";
+         resets = <&ccu 2>;
+         interrupts = <0 31 0>;
+         nvmem-cells = <&ths_calibration>;
+         nvmem-cell-names = "calibration";
+         #thermal-sensor-cells = <0>;
+    };
+
+  - |
+    thermal-sensor@5070400 {
+         compatible = "allwinner,sun50i-h6-ths";
+         reg = <0x05070400 0x100>;
+         clocks = <&ccu 0>;
+         clock-names = "bus";
+         resets = <&ccu 2>;
+         interrupts = <0 15 0>;
+         nvmem-cells = <&ths_calibration>;
+         nvmem-cell-names = "calibration";
+         #thermal-sensor-cells = <1>;
+    };
+
+...