linux-kernel - Re: [PATCH v1 14/15] dt-bindings: auxdisplay: Add Maxim MAX6958/6959

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Date: Fri, 9 Feb 2024 09:02:44 +0100
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Cc: Miguel Ojeda <ojeda@...nel.org>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
 Conor Dooley <conor+dt@...nel.org>, Robin van der Gracht
 <robin@...tonic.nl>, Paul Burton <paulburton@...nel.org>,
 Geert Uytterhoeven <geert+renesas@...der.be>
Subject: Re: [PATCH v1 14/15] dt-bindings: auxdisplay: Add Maxim MAX6958/6959

On 08/02/2024 19:48, Andy Shevchenko wrote:
> Add initial device tree documentation for Maxim MAX6958/6959.
> 
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
> ---
>  .../bindings/auxdisplay/maxim,max6959.yaml    | 35 +++++++++++++++++++
>  1 file changed, 35 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/auxdisplay/maxim,max6959.yaml
> 
> diff --git a/Documentation/devicetree/bindings/auxdisplay/maxim,max6959.yaml b/Documentation/devicetree/bindings/auxdisplay/maxim,max6959.yaml
> new file mode 100644
> index 000000000000..49ce26176797
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/auxdisplay/maxim,max6959.yaml
> @@ -0,0 +1,35 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/auxdisplay/maxim,max6959.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: MAX6958/6959 7-segment LED display controller with keyscan
> +
> +maintainers:
> +  - Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
> +

Please describe the device, e.g. bus/interface.

> +properties:
> +  compatible:
> +    const: maxim,max6959

Your title said also max6958, so I would expect it to be here as well.
Cam be followed by 6959 fallback compatible, if they are compatible.

> +
> +  reg:
> +    maxItems: 1

No power supplies? No reset pins?

> +
> +required:
> +  - compatible
> +  - reg
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    i2c {
> +            #address-cells = <1>;

Use 4 spaces for example indentation. 2 is also fine.

> +            #size-cells = <0>;
> +
> +            max6959: max6959@38 {

Node names should be generic. See also an explanation and list of
examples (not exhaustive) in DT specification:
https://devicetree-specification.readthedocs.io/en/latest/chapter2-devicetree-basics.html#generic-names-recommendation
e.g. display-controller or display

> +                    compatible = "maxim,max6959";
> +                    reg = <0x38>;
> +            };
> +      };

Best regards,
Krzysztof