linux-kernel - Re: [PATCH v2 1/3] dt-bindings: hwmon: Add maxim max31790 bindings

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Message-ID: <80effcab-74b8-4e15-a4db-9982b000b6b1@linaro.org>
Date: Sun, 14 Apr 2024 08:03:36 +0200
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: Chanh Nguyen <chanh@...amperecomputing.com>,
 Jean Delvare <jdelvare@...e.com>, Guenter Roeck <linux@...ck-us.net>,
 Rob Herring <robh+dt@...nel.org>,
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
 Conor Dooley <conor+dt@...nel.org>, Justin Ledford
 <justinledford@...gle.com>, devicetree@...r.kernel.org,
 linux-hwmon@...r.kernel.org, linux-kernel@...r.kernel.org,
 OpenBMC Maillist <openbmc@...ts.ozlabs.org>,
 Open Source Submission <patches@...erecomputing.com>
Cc: Phong Vo <phong@...amperecomputing.com>,
 Thang Nguyen <thang@...amperecomputing.com>,
 Quan Nguyen <quan@...amperecomputing.com>
Subject: Re: [PATCH v2 1/3] dt-bindings: hwmon: Add maxim max31790 bindings

On 14/04/2024 06:22, Chanh Nguyen wrote:
> Add a device tree bindings for max31790 device.
> 

Nothing improved in commit msg, where is the rationale of split of bindings?

A nit, subject: drop second/last, redundant "bindings". The
"dt-bindings" prefix is already stating that these are bindings.
See also:
https://elixir.bootlin.com/linux/v6.7-rc8/source/Documentation/devicetree/bindings/submitting-patches.rst#L18

> Signed-off-by: Chanh Nguyen <chanh@...amperecomputing.com>
> ---
> Changes in v2:
>  - Update filename of the maxim,max31790.yaml                            [Krzysztof]
>  - Add the common fan schema to $ref                                     [Krzysztof]
>  - Update the node name to "fan-controller" in maxim,max31790.yaml       [Krzysztof]
>  - Drop "driver" in commit title                                         [Krzysztof]
> ---
>  .../bindings/hwmon/maxim,max31790.yaml        | 52 +++++++++++++++++++
>  1 file changed, 52 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/hwmon/maxim,max31790.yaml
> 
> diff --git a/Documentation/devicetree/bindings/hwmon/maxim,max31790.yaml b/Documentation/devicetree/bindings/hwmon/maxim,max31790.yaml
> new file mode 100644
> index 000000000000..a561e5a3e9e4
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/hwmon/maxim,max31790.yaml
> @@ -0,0 +1,52 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/hwmon/maxim,max31790.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: The Maxim MAX31790 Fan Controller
> +
> +maintainers:
> +  - Guenter Roeck <linux@...ck-us.net>
> +
> +description: >
> +  The MAX31790 controls the speeds of up to six fans using six
> +  independent PWM outputs. The desired fan speeds (or PWM duty cycles)
> +  are written through the I2C interface.
> +
> +  Datasheets:
> +    https://datasheets.maximintegrated.com/en/ds/MAX31790.pdf
> +
> +properties:
> +  compatible:
> +    const: maxim,max31790
> +
> +  reg:
> +    maxItems: 1
> +
> +  clocks:
> +    maxItems: 1
> +
> +  resets:
> +    maxItems: 1
> +
> +required:
> +  - compatible
> +  - reg
> +
> +allOf:
> +  - $ref: fan-common.yaml#
> +
> +unevaluatedProperties: false
> +
> +examples:
> +  - |
> +    i2c {
> +      #address-cells = <1>;
> +      #size-cells = <0>;
> +
> +      fan-controller@20 {
> +        compatible = "maxim,max31790";
> +        reg = <0x20>;

Make the example complete - add all properties, like clocks, resets and
any others which are applicable.

Best regards,
Krzysztof