linux-kernel - Re: [net-next PATCH 1/2] dt-bindings: net: snps,dwmac: DMA Arbitration scheme

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Message-ID: <20230927-dense-scoundrel-22ede0e27973@spud>
Date:   Wed, 27 Sep 2023 15:59:32 +0100
From:   Conor Dooley <conor@...nel.org>
To:     Christian Marangi <ansuelsmth@...il.com>
Cc:     "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>,
        Conor Dooley <conor+dt@...nel.org>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        Jose Abreu <joabreu@...opsys.com>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Simon Horman <horms@...nel.org>,
        Andrew Halaney <ahalaney@...hat.com>,
        Bartosz Golaszewski <bartosz.golaszewski@...aro.org>,
        "Russell King (Oracle)" <rmk+kernel@...linux.org.uk>,
        Shenwei Wang <shenwei.wang@....com>,
        Jochen Henneberg <jh@...neberg-systemdesign.com>,
        Giuseppe Cavallaro <peppe.cavallaro@...com>,
        netdev@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        linux-stm32@...md-mailman.stormreply.com,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [net-next PATCH 1/2] dt-bindings: net: snps,dwmac: DMA
 Arbitration scheme

On Wed, Sep 27, 2023 at 02:29:27PM +0200, Christian Marangi wrote:
> Document new binding snps,arbit to program the DMA to use Arbitration
> scheme. (Rx has priority over Tx)
> 
> Signed-off-by: Christian Marangi <ansuelsmth@...il.com>
> ---
>  Documentation/devicetree/bindings/net/snps,dwmac.yaml | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/net/snps,dwmac.yaml b/Documentation/devicetree/bindings/net/snps,dwmac.yaml
> index 5c2769dc689a..4499f221c29b 100644
> --- a/Documentation/devicetree/bindings/net/snps,dwmac.yaml
> +++ b/Documentation/devicetree/bindings/net/snps,dwmac.yaml
> @@ -442,6 +442,12 @@ properties:
>      description:
>        Use Address-Aligned Beats
>  
> +  snps,arbit:
> +    $ref: /schemas/types.yaml#/definitions/flag
> +    description:
> +      Program the DMA to use Arbitration scheme.
> +      (Rx has priority over Tx)

Can you explain please what makes this a property of the hardware, or
otherwise makes it suitable for inclusion in DT?

> +
>    snps,fixed-burst:
>      $ref: /schemas/types.yaml#/definitions/flag
>      description:
> -- 
> 2.40.1
> 

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