linux-kernel - Re: [PATCH v3 4/4] net: phy: marvell-88q2xxx: add driver for the Marvell 88Q2220 PHY

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Message-ID: <59fed161-6c08-4537-b02d-19e67e342dd8@lunn.ch>
Date: Thu, 21 Dec 2023 15:25:56 +0100
From: Andrew Lunn <andrew@...n.ch>
To: Dimitri Fedrau <dima.fedrau@...il.com>
Cc: Stefan Eichenberger <eichest@...il.com>,
	Heiner Kallweit <hkallweit1@...il.com>,
	Russell King <linux@...linux.org.uk>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 4/4] net: phy: marvell-88q2xxx: add driver for the
 Marvell 88Q2220 PHY

> Without setting the master-slave option it didn't work. I think its
> mandatory.

I don't think it is. The PHY should have a default setting for
master-slave. Often its based on the typical use case. If its
typically inside a switch, then it should default to prefer-master. If
its typically in an end system, then it should be prefer-slave.

    Andrew