new file mode 100644
@@ -0,0 +1,43 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/hwmon/sophgo,sg2042-hwmon-mcu.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Sophgo SG2042 onboard MCU support
+
+maintainers:
+ - Inochi Amaoto <inochiama@outlook.com>
+
+properties:
+ compatible:
+ const: sophgo,sg2042-hwmon-mcu
+
+ reg:
+ maxItems: 1
+
+ "#thermal-sensor-cells":
+ const: 1
+
+required:
+ - compatible
+ - reg
+ - "#thermal-sensor-cells"
+
+allOf:
+ - $ref: /schemas/thermal/thermal-sensor.yaml#
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ i2c {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ hwmon@17 {
+ compatible = "sophgo,sg2042-hwmon-mcu";
+ reg = <0x17>;
+ #thermal-sensor-cells = <1>;
+ };
+ };