linux-kernel - Re: [RFC PATCH net-next 0/7] net: phy: introduce phy numbering

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Message-ID: <60703503-e592-4467-a942-74400583369d@lunn.ch>
Date:   Thu, 14 Sep 2023 14:47:44 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Christophe Leroy <christophe.leroy@...roup.eu>
Cc:     Maxime Chevallier <maxime.chevallier@...tlin.com>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Jakub Kicinski <kuba@...nel.org>,
        Eric Dumazet <edumazet@...gle.com>,
        Paolo Abeni <pabeni@...hat.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Russell King <linux@...linux.org.uk>,
        Vladimir Oltean <vladimir.oltean@....com>,
        Oleksij Rempel <linux@...pel-privat.de>,
        Nicolò Veronese <nicveronese@...il.com>,
        "thomas.petazzoni@...tlin.com" <thomas.petazzoni@...tlin.com>
Subject: Re: [RFC PATCH net-next 0/7] net: phy: introduce phy numbering

> FWIW when thinking about multiple PHY to a single MAC, what comes to my 
> mind is the SIS 900 board, and its driver net/ethernet/sis/sis900.c
> 
> It has a function sis900_default_phy() that loops over all phys to find 
> one with up-link then to put all but that one in ISOLATE mode. Then when 
> the link goes down it loops again to find another up-link.
> 
> I guess your series would also help in that case, wouldn't it ?

Yes, it would. However, that driver would need its PHY handling
re-written because it is using the old MII code, not phylib.

	Andrew