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Message-ID: <55c11fd9-54cf-4460-a10c-52ff62b46a4c@lunn.ch> Date: Thu, 11 May 2023 02:28:15 +0200 From: Andrew Lunn <andrew@...n.ch> To: Daniel Golle <daniel@...rotopia.org> Cc: netdev@...r.kernel.org, linux-mediatek@...ts.infradead.org, linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, 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>, AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com> Subject: Re: [PATCH net-next 0/8] Improvements for RealTek 2.5G Ethernet PHYs On Thu, May 11, 2023 at 12:53:22AM +0200, Daniel Golle wrote: > Improve support for RealTek 2.5G Ethernet PHYs (RTL822x series). > The PHYs can operate with Clause-22 and Clause-45 MDIO. > > When using Clause-45 it is desireable to avoid rate-adapter mode and > rather have the MAC interface mode follow the PHY speed. The PHYs > support 2500Base-X for 2500M, and Cisco SGMII for 1000M/100M/10M. I don't see what clause-45 has to do with this. The driver knows that both C22 and C45 addresses spaces exists in the hardware. It can do reads/writes on both. If the bus master does not support C45, C45 over C22 will be performed by the core. Andrew
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