linux-kernel - Re: [PATCH 1/2] dt-bindings: gpio: max7317: add gpio driver bindings

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Date:   Tue, 6 Dec 2022 07:16:50 -0600
From:   Rob Herring <robh@...nel.org>
To:     Edmund Berenson <edmund.berenson@...ix.com>
Cc:     Lukasz Zemla <Lukasz.Zemla@...dward.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <brgl@...ev.pl>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        linux-gpio@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] dt-bindings: gpio: max7317: add gpio driver bindings

On Tue, Dec 06, 2022 at 01:44:55PM +0100, Edmund Berenson wrote:
> Add driver bindings for the maxim max7317 spi
> gpio expander.

Bindings are for h/w, not drivers.

s/maxim/Maxim/
s/spi/SPI/

For the subject, no need to say 'bindings' twice:

dt-bindings: gpio: Add Maxim max7317 GPIO expander 

> 
> Co-developed-by: Lukasz Zemla <Lukasz.Zemla@...dward.com>
> Signed-off-by: Lukasz Zemla <Lukasz.Zemla@...dward.com>
> Signed-off-by: Edmund Berenson <edmund.berenson@...ix.com>
> ---
>  .../bindings/gpio/gpio-max7317.yaml           | 52 +++++++++++++++++++
>  1 file changed, 52 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/gpio/gpio-max7317.yaml
> 
> diff --git a/Documentation/devicetree/bindings/gpio/gpio-max7317.yaml b/Documentation/devicetree/bindings/gpio/gpio-max7317.yaml
> new file mode 100644
> index 000000000000..88f1fe02a627
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/gpio/gpio-max7317.yaml
> @@ -0,0 +1,52 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/gpio/gpio-max7317.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Maxim MAX7317 SPI-Interfaced I/O Expander
> +
> +description: |

Don't need '|'

> +  Bindings for 10-Port Maxim MAX7317 SPI GPIO expanders.
> +
> +properties:
> +  compatible:
> +    const: maxim,max7317
> +
> +  reg:
> +    maxItems: 1
> +
> +  gpio-controller: true
> +
> +  '#gpio-cells':
> +    const: 2
> +
> +  gpio-line-names:
> +    minItems: 1
> +    maxItems: 10
> +
> +required:
> +  - compatible
> +  - reg
> +  - gpio-controller
> +  - "#gpio-cells"
> +
> +additionalProperties: false

unevaluatedProperties: false

Or the $ref below doesn't work.

> +
> +allOf:
> +  - $ref: /schemas/spi/spi-peripheral-props.yaml#
> +
> +examples:
> +  - |
> +    spi {
> +            #address-cells = <1>;
> +            #size-cells = <0>;
> +
> +            gpio5: gpio5@0 {

gpio@0 {

> +                    compatible = "maxim,max7317";
> +                    reg = <0>;
> +                    gpio-controller;
> +                    #gpio-cells = <2>;
> +                    spi-max-frequency = <100000>;
> +            };
> +    };
> -- 
> 2.37.4
> 
>