From f6bd99a2d24ecccb560771dde13eff2d0808d897 Mon Sep 17 00:00:00 2001 From: Marek Vasut Date: Mon, 30 Jun 2025 00:07:19 +0200 Subject: [PATCH] dt-bindings: pwm: argon40,fan-hat: Document Argon40 Fan HAT MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Document trivial PWM on Argon40 Fan HAT, which is a RaspberryPi blower fan hat which can be controlled over I2C. Reviewed-by: Rob Herring (Arm) Signed-off-by: Marek Vasut Link: https://lore.kernel.org/r/20250629220757.936212-2-marek.vasut+renesas@mailbox.org Signed-off-by: Uwe Kleine-König --- .../bindings/pwm/argon40,fan-hat.yaml | 48 +++++++++++++++++++ 1 file changed, 48 insertions(+) create mode 100644 Documentation/devicetree/bindings/pwm/argon40,fan-hat.yaml diff --git a/Documentation/devicetree/bindings/pwm/argon40,fan-hat.yaml b/Documentation/devicetree/bindings/pwm/argon40,fan-hat.yaml new file mode 100644 index 0000000000000..7dbc7c2cd8025 --- /dev/null +++ b/Documentation/devicetree/bindings/pwm/argon40,fan-hat.yaml @@ -0,0 +1,48 @@ +# 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 + +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>; + }; + }; -- 2.47.2