dt-bindings: thermal: convert bcm2835-thermal bindings to YAML

Convert the DT binding document for bcm2835-thermal from .txt to YAML.
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20230604121223.9625-10-stefan.wahren@i2se.com

Documentation/devicetree/bindings/thermal/brcm,bcm2835-thermal.txt

-Binding for Thermal Sensor driver for BCM2835 SoCs.
-
-Required parameters:
--------------------
-
-compatible: 		should be one of: "brcm,bcm2835-thermal",
-			"brcm,bcm2836-thermal" or "brcm,bcm2837-thermal"
-reg:			Address range of the thermal registers.
-clocks: 		Phandle of the clock used by the thermal sensor.
-#thermal-sensor-cells:	should be 0 (see Documentation/devicetree/bindings/thermal/thermal-sensor.yaml)
-
-Example:
-
-thermal-zones {
-	cpu_thermal: cpu-thermal {
-		polling-delay-passive = <0>;
-		polling-delay = <1000>;
-
-		thermal-sensors = <&thermal>;
-
-		trips {
-			cpu-crit {
-				temperature	= <80000>;
-				hysteresis	= <0>;
-				type		= "critical";
-			};
-		};
-
-		coefficients = <(-538)	407000>;
-
-		cooling-maps {
-		};
-	};
-};
-
-thermal: thermal@7e212000 {
-	compatible = "brcm,bcm2835-thermal";
-	reg = <0x7e212000 0x8>;
-	clocks = <&clocks BCM2835_CLOCK_TSENS>;
-	#thermal-sensor-cells = <0>;
-};

Documentation/devicetree/bindings/thermal/brcm,bcm2835-thermal.yaml

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/thermal/brcm,bcm2835-thermal.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Broadcom BCM2835 thermal sensor
+
+maintainers:
+  - Stefan Wahren <stefan.wahren@i2se.com>
+
+allOf:
+  - $ref: thermal-sensor.yaml#
+
+properties:
+  compatible:
+    enum:
+      - brcm,bcm2835-thermal
+      - brcm,bcm2836-thermal
+      - brcm,bcm2837-thermal
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  "#thermal-sensor-cells":
+    const: 0
+
+unevaluatedProperties: false
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - '#thermal-sensor-cells'
+
+examples:
+  - |
+    #include <dt-bindings/clock/bcm2835.h>
+
+    thermal@7e212000 {
+      compatible = "brcm,bcm2835-thermal";
+      reg = <0x7e212000 0x8>;
+      clocks = <&clocks BCM2835_CLOCK_TSENS>;
+      #thermal-sensor-cells = <0>;
+    };