Re: [PATCH v3 2/3] dt-bindings: pwm: argon40,fan-hat: Document Argon40 Fan HAT

[Rob Herring <robh@kernel.org>]

On Tue, Jun 17, 2025 at 11:19:35AM +0200, Marek Vasut wrote:
> Document trivial PWM on Argon40 Fan HAT, which is a RaspberryPi
> blower fan hat which can be controlled over I2C.
> 
> Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
> ---
> Cc: "Uwe Kleine-König" <ukleinek@kernel.org>
> Cc: Conor Dooley <conor+dt@kernel.org>
> Cc: Krzysztof Kozlowski <krzk+dt@kernel.org>
> Cc: Rob Herring <robh@kernel.org>
> Cc: devicetree@vger.kernel.org
> Cc: linux-pwm@vger.kernel.org
> Cc: linux-renesas-soc@vger.kernel.org
> ---
> V2: Implement dedicated binding document
> V3: Update the description and pwm-cells
> ---
>  .../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 000000000000..a0010700ab12
> --- /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 <marek.vasut+renesas@mailbox.org>
> +
> +description: |

Don't need '|'.

> +  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 = <2>;
> +      };
> +    };
> -- 
> 2.47.2
>