netdev - Re: [PATCH RFC] powerpc: switch two fixed phy links to full duplex

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Message-ID: <5d302153-c7f6-48dc-95cc-0dc4f25045c6@lunn.ch>
Date: Fri, 5 Dec 2025 18:50:35 +0100
From: Andrew Lunn <andrew@...n.ch>
To: Heiner Kallweit <hkallweit1@...il.com>
Cc: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Madhavan Srinivasan <maddy@...ux.ibm.com>,
	Michael Ellerman <mpe@...erman.id.au>,
	Nicholas Piggin <npiggin@...il.com>,
	Christophe Leroy <christophe.leroy@...roup.eu>,
	Pantelis Antoniou <pantelis.antoniou@...il.com>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: [PATCH RFC] powerpc: switch two fixed phy links to full duplex

On Fri, Dec 05, 2025 at 06:21:50PM +0100, Heiner Kallweit wrote:
> These two fixed links are the only ones in-kernel specifying half duplex.
> If these could be switched to full duplex, then half duplex handling
> could be removed from phylib fixed phy, phylink, swphy.
> 
> The SoC MAC's are capable of full duplex, fs_enet MAC driver is as well.
> Anything that would keep us from switching to full duplex?

What do we know about the device on the other end of the link? Maybe
that is what is limiting it to 10Half?

	Andrew