linux-kernel - Re: [PATCH 1/2] dt-bindings: net: Add rfkill-gpio binding

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Message-ID: <e99d6756-e275-7dd6-a57f-1c9a120b4ef3@kernel.org>
Date:   Thu, 22 Dec 2022 11:20:07 +0100
From:   Krzysztof Kozlowski <krzk@...nel.org>
To:     Philipp Zabel <p.zabel@...gutronix.de>,
        Johannes Berg <johannes@...solutions.net>
Cc:     netdev@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-wireless@...r.kernel.org,
        kernel@...gutronix.de
Subject: Re: [PATCH 1/2] dt-bindings: net: Add rfkill-gpio binding

On 21/12/2022 11:48, Philipp Zabel wrote:
> Add a device tree binding document for GPIO controlled rfkill switches.
> The name, type, shutdown-gpios and reset-gpios properties are the same
> as defined for ACPI.
> 
> Signed-off-by: Philipp Zabel <p.zabel@...gutronix.de>

Please use scripts/get_maintainers.pl to get a list of necessary people
and lists to CC.  It might happen, that command when run on an older
kernel, gives you outdated entries.  Therefore please be sure you base
your patches on recent Linux kernel.

You missed several maintainers. Resend.

> ---
>  .../devicetree/bindings/net/rfkill-gpio.yaml  | 60 +++++++++++++++++++
>  1 file changed, 60 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/net/rfkill-gpio.yaml
> 
> diff --git a/Documentation/devicetree/bindings/net/rfkill-gpio.yaml b/Documentation/devicetree/bindings/net/rfkill-gpio.yaml
> new file mode 100644
> index 000000000000..6e62e6c96456
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/net/rfkill-gpio.yaml
> @@ -0,0 +1,60 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: "http://devicetree.org/schemas/net/rfkill-gpio.yaml#"
> +$schema: "http://devicetree.org/meta-schemas/core.yaml#"

Drop quotes.

> +
> +title: GPIO controlled rfkill switch
> +
> +maintainers:
> +  - Johannes Berg <johannes@...solutions.net>
> +  - Philipp Zabel <p.zabel@...gutronix.de>
> +
> +properties:
> +  compatible:
> +    const: rfkill-gpio
> +
> +  name:
> +    $ref: /schemas/types.yaml#/definitions/string
> +    description: rfkill switch name, defaults to node name

There is a generic label property.

> +
> +  type:
> +    description: rfkill radio type
> +    enum:
> +      - wlan
> +      - bluetooth
> +      - ultrawideband
> +      - wimax
> +      - wwan
> +      - gps
> +      - fm
> +      - nfc

Order the list.

> +
> +  shutdown-gpios:
> +    maxItems: 1
> +
> +  reset-gpios:
> +    maxItems: 1

Reset of rfkill? It seems entire binding is a workaround of missing
reset in your device. I don't think this is suitable for binding.

> +
> +required:
> +  - compatible
> +  - type
> +
> +oneOf:
> +  - required:
> +      - shutdown-gpios
> +  - required:
> +      - reset-gpios
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/gpio/gpio.h>
> +
> +    rfkill-pcie-wlan {

Generic node names, so: rfkill
> +        compatible = "rfkill-gpio";
> +        name = "rfkill-pcie-wlan";
> +        type = "wlan";
> +        shutdown-gpios = <&gpio2 25 GPIO_ACTIVE_HIGH>;
> +    };

Best regards,
Krzysztof