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+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/pwm/argon40,fan-hat.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Argon40 Fan HAT PWM controller
+
+maintainers:
+ - Marek Vasut <marek.vasut+renesas@mailbox.org>
+
+description:
+ The trivial PWM on Argon40 Fan HAT, which is a RaspberryPi blower fan
+ hat which can be controlled over I2C, generates a fixed 30 kHz period
+ PWM signal with configurable 0..100% duty cycle to control the fan
+ speed.
+
+allOf:
+ - $ref: pwm.yaml#
+
+properties:
+ compatible:
+ const: argon40,fan-hat
+
+ reg:
+ maxItems: 1
+
+ "#pwm-cells":
+ const: 3
+
+required:
+ - compatible
+ - reg
+
+additionalProperties: false
+
+examples:
+ - |
+ i2c {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ pwm@1a {
+ compatible = "argon40,fan-hat";
+ reg = <0x1a>;
+ #pwm-cells = <3>;
+ };
+ };