linux-kernel - Re: [PATCH 1/2] dt-bindings: bcm4329-fmac: add optional brcm,ccode-map-trivial

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Date:   Thu, 14 Jul 2022 17:21:25 +0200
From:   Ahmad Fatoum <a.fatoum@...gutronix.de>
To:     Alvin Šipraga <alvin@...s.dk>,
        Kalle Valo <kvalo@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Arend van Spriel <aspriel@...il.com>,
        Franky Lin <franky.lin@...adcom.com>,
        Hante Meuleman <hante.meuleman@...adcom.com>,
        van Spriel <arend@...adcom.com>
Cc:     Alvin Šipraga <alsi@...g-olufsen.dk>,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        brcm80211-dev-list.pdl@...adcom.com,
        SHA-cyfmac-dev-list@...ineon.com,
        Pengutronix Kernel Team <kernel@...gutronix.de>
Subject: Re: [PATCH 1/2] dt-bindings: bcm4329-fmac: add optional
 brcm,ccode-map-trivial

On 11.07.22 14:30, Alvin Šipraga wrote:
> From: Alvin Šipraga <alsi@...g-olufsen.dk>
> 
> The bindings already offer a brcm,ccode-map property to describe the
> mapping between the kernel's ISO3166 alpha 2 country code string and the
> firmware's country code string and revision number. This is a
> board-specific property and determined by the CLM blob firmware provided
> by the hardware vendor.
> 
> However, in some cases the firmware will also use ISO3166 country codes
> internally, and the revision will always be zero. This implies a trivial
> mapping: cc -> { cc, 0 }.
> 
> For such cases, add an optional property brcm,ccode-map-trivial which
> obviates the need to describe every trivial country code mapping in the
> device tree with the existing brcm,ccode-map property. The new property
> is subordinate to the more explicit brcm,ccode-map property.
> 
> Signed-off-by: Alvin Šipraga <alsi@...g-olufsen.dk>

Reviewed-by: Ahmad Fatoum <a.fatoum@...gutronix.de>

> ---
>  .../bindings/net/wireless/brcm,bcm4329-fmac.yaml       | 10 ++++++++++
>  1 file changed, 10 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/net/wireless/brcm,bcm4329-fmac.yaml b/Documentation/devicetree/bindings/net/wireless/brcm,bcm4329-fmac.yaml
> index c11f23b20c4c..53b4153d9bfc 100644
> --- a/Documentation/devicetree/bindings/net/wireless/brcm,bcm4329-fmac.yaml
> +++ b/Documentation/devicetree/bindings/net/wireless/brcm,bcm4329-fmac.yaml
> @@ -75,6 +75,16 @@ properties:
>      items:
>        pattern: '^[A-Z][A-Z]-[A-Z][0-9A-Z]-[0-9]+$'
>  
> +  brcm,ccode-map-trivial:
> +    description: |
> +      Use a trivial mapping of ISO3166 country codes to brcmfmac firmware
> +      country code and revision: cc -> { cc, 0 }. In other words, assume that
> +      the CLM blob firmware uses ISO3166 country codes as well, and that all
> +      revisions are zero. This property is mutually exclusive with
> +      brcm,ccode-map. If both properties are specified, then brcm,ccode-map
> +      takes precedence.
> +    type: boolean
> +
>  required:
>    - compatible
>    - reg


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