linux-kernel - Re: [PATCH 4/4] dt-bindings: gpio: Add Loongson-1 GPIO

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Date:   Wed, 22 Feb 2023 13:35:04 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Keguang Zhang <keguang.zhang@...il.com>,
        linux-gpio@...r.kernel.org, devicetree@...r.kernel.org,
        linux-mips@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <brgl@...ev.pl>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
Subject: Re: [PATCH 4/4] dt-bindings: gpio: Add Loongson-1 GPIO

On 22/02/2023 12:12, Keguang Zhang wrote:
> Add devicetree binding document for Loongson-1 GPIO.
> 
> Signed-off-by: Keguang Zhang <keguang.zhang@...il.com>
> ---
>  .../bindings/gpio/loongson,ls1x-gpio.yaml     | 60 +++++++++++++++++++
>  1 file changed, 60 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/gpio/loongson,ls1x-gpio.yaml
> 
> diff --git a/Documentation/devicetree/bindings/gpio/loongson,ls1x-gpio.yaml b/Documentation/devicetree/bindings/gpio/loongson,ls1x-gpio.yaml
> new file mode 100644
> index 000000000000..e4ab49d48fae
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/gpio/loongson,ls1x-gpio.yaml
> @@ -0,0 +1,60 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/gpio/loongson,ls1x-gpio.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Loongson-1 GPIO controller
> +
> +maintainers:
> +  - Keguang Zhang <keguang.zhang@...il.com>
> +
> +properties:
> +  compatible:
> +    const: loongson,ls1x-gpio
> +
> +  reg:
> +    maxItems: 1
> +
> +  gpio-controller: true
> +
> +  "#gpio-cells":
> +    const: 2
> +
> +  ngpios:
> +    minimum: 1
> +    maximum: 32

Isn't this fixed at 32? Do you have hardware with different number of GPIOs?

> +
> +required:
> +  - compatible
> +  - reg
> +  - gpio-controller
> +  - '#gpio-cells'

Use consistent quotes - either " or '

> +  - ngpios
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    gpio0: gpio@...010c0 {
> +        compatible = "loongson,ls1x-gpio";
> +        reg = <0x1fd010c0 0x4>;
> +
> +        gpio-controller;
> +        #gpio-cells = <2>;
> +
> +        ngpios = <32>;
> +    };
> +
> +  - |
> +    gpio1: gpio@...010c4 {
> +        compatible = "loongson,ls1x-gpio";
> +        reg = <0x1fd010c4 0x4>;
> +
> +        gpio-controller;
> +        #gpio-cells = <2>;
> +
> +        ngpios = <32>;
> +    };

These are two the same examples, keep only one.

Best regards,
Krzysztof