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Message-ID: <20250627213454.GA179652-robh@kernel.org>
Date: Fri, 27 Jun 2025 16:34:54 -0500
From: Rob Herring <robh@...nel.org>
To: Álvaro Fernández Rojas <noltari@...il.com>
Cc: jdelvare@...e.com, linux@...ck-us.net, krzk+dt@...nel.org,
	conor+dt@...nel.org, corbet@....net, linux-hwmon@...r.kernel.org,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-doc@...r.kernel.org
Subject: Re: [PATCH 2/3] dt-bindings: hwmon: Add Microchip EMC2101 support

On Thu, Jun 26, 2025 at 01:33:50PM +0200, Álvaro Fernández Rojas wrote:
> Introduce yaml schema for Microchip emc2101 pwm fan controller with
> temperature monitoring.
> 
> Signed-off-by: Álvaro Fernández Rojas <noltari@...il.com>
> ---
>  .../bindings/hwmon/microchip,emc2101.yaml     | 52 +++++++++++++++++++
>  1 file changed, 52 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/hwmon/microchip,emc2101.yaml
> 
> diff --git a/Documentation/devicetree/bindings/hwmon/microchip,emc2101.yaml b/Documentation/devicetree/bindings/hwmon/microchip,emc2101.yaml
> new file mode 100644
> index 000000000000..e73f1f9d43f4
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/hwmon/microchip,emc2101.yaml
> @@ -0,0 +1,52 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/hwmon/microchip,emc2101.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Microchip EMC2101 SMBus compliant PWM fan controller
> +
> +maintainers:
> +  - Álvaro Fernández Rojas <noltari@...il.com>
> +
> +description:
> +  Microchip EMC2101 pwm controller which supports up to 1 fan, 1 internal
> +  temperature sensor, 1 external temperature sensor and an 8 entry look
> +  up table to create a programmable temperature response.
> +
> +properties:
> +  compatible:
> +    enum:
> +      - microchip,emc2101
> +      - microchip,emc2101-r
> +
> +  reg:
> +    maxItems: 1
> +

> +  '#address-cells':
> +    const: 1
> +
> +  '#size-cells':
> +    const: 0

What are these for? You don't have any child nodes.

> +
> +required:
> +  - compatible
> +  - reg
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    i2c {
> +        #address-cells = <1>;
> +        #size-cells = <0>;
> +
> +        fan_controller: fan-controller@4c {
> +            compatible = "microchip,emc2101";
> +            reg = <0x4c>;
> +
> +            #address-cells = <1>;
> +            #size-cells = <0>;
> +        };
> +    };
> +...
> -- 
> 2.39.5
> 

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