linux-kernel - Re: [PATCH net-next 3/4] net: ethernet: ti: am65-cpsw: fixup PHY mode for fixed RGMII TX delay

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Message-ID: <9c00ff66-a2c6-4d7e-979b-f5e8abc42dee@lunn.ch>
Date: Fri, 18 Apr 2025 22:50:40 +0200
From: Andrew Lunn <andrew@...n.ch>
To: Matthias Schiffer <matthias.schiffer@...tq-group.com>
Cc: Andrew Lunn <andrew+netdev@...n.ch>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Andy Whitcroft <apw@...onical.com>,
	Dwaipayan Ray <dwaipayanray1@...il.com>,
	Lukas Bulwahn <lukas.bulwahn@...il.com>,
	Joe Perches <joe@...ches.com>, Jonathan Corbet <corbet@....net>,
	Nishanth Menon <nm@...com>, Vignesh Raghavendra <vigneshr@...com>,
	Siddharth Vadapalli <s-vadapalli@...com>,
	Roger Quadros <rogerq@...nel.org>, Tero Kristo <kristo@...nel.org>,
	linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org, devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux@...tq-group.com
Subject: Re: [PATCH net-next 3/4] net: ethernet: ti: am65-cpsw: fixup PHY
 mode for fixed RGMII TX delay

On Tue, Apr 15, 2025 at 12:18:03PM +0200, Matthias Schiffer wrote:
> All am65-cpsw controllers have a fixed TX delay, so the PHY interface
> mode must be fixed up to account for this.
> 
> Modes that claim to a delay on the PCB can't actually work. Warn people
> to update their Device Trees if one of the unsupported modes is specified.
> 
> Signed-off-by: Matthias Schiffer <matthias.schiffer@...tq-group.com>

Reviewed-by: Andrew Lunn <andrew@...n.ch>

    Andrew