linux-kernel - Re: [PATCH net-next v3 1/2] dt-bindings: net: Add documentation for Half duplex support.

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Message-ID: <169470176101.1248181.5708025774041263558.robh@kernel.org>
Date:   Thu, 14 Sep 2023 09:29:21 -0500
From:   Rob Herring <robh@...nel.org>
To:     MD Danish Anwar <danishanwar@...com>
Cc:     Jakub Kicinski <kuba@...nel.org>, Simon Horman <horms@...nel.org>,
        linux-kernel@...r.kernel.org, Andrew Lunn <andrew@...n.ch>,
        Paolo Abeni <pabeni@...hat.com>, netdev@...r.kernel.org,
        Eric Dumazet <edumazet@...gle.com>,
        Vignesh Raghavendra <vigneshr@...com>,
        Rob Herring <robh+dt@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Roger Quadros <rogerq@...com>, devicetree@...r.kernel.org,
        srk@...com, r-gunasekaran@...com, Roger Quadros <rogerq@...nel.org>
Subject: Re: [PATCH net-next v3 1/2] dt-bindings: net: Add documentation for
 Half duplex support.


On Wed, 13 Sep 2023 14:40:10 +0530, MD Danish Anwar wrote:
> In order to support half-duplex operation at 10M and 100M link speeds, the
> PHY collision detection signal (COL) should be routed to ICSSG
> GPIO pin (PRGx_PRU0/1_GPI10) so that firmware can detect collision signal
> and apply the CSMA/CD algorithm applicable for half duplex operation. A DT
> property, "ti,half-duplex-capable" is introduced for this purpose. If
> board has PHY COL pin conencted to PRGx_PRU1_GPIO10, this DT property can
> be added to eth node of ICSSG, MII port to support half duplex operation at
> that port.
> 
> Reviewed-by: Roger Quadros <rogerq@...nel.org>
> Signed-off-by: MD Danish Anwar <danishanwar@...com>
> ---
>  Documentation/devicetree/bindings/net/ti,icssg-prueth.yaml | 7 +++++++
>  1 file changed, 7 insertions(+)
> 

Reviewed-by: Rob Herring <robh@...nel.org>