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Message-ID: <0b22dd51-417c-436d-87ce-7ebc41185860@lunn.ch> Date: Sun, 26 Nov 2023 18:31:08 +0100 From: Andrew Lunn <andrew@...n.ch> To: Luo Jie <quic_luoj@...cinc.com> Cc: davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com, robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org, hkallweit1@...il.com, linux@...linux.org.uk, corbet@....net, netdev@...r.kernel.org, devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org Subject: Re: [PATCH v6 3/6] net: phy: at803x: add QCA8084 ethernet phy support > + /* There are two PCSs available for QCA8084, which support the > + * following interface modes. > + * > + * 1. PHY_INTERFACE_MODE_10G_QXGMII utilizes PCS1 for all > + * available 4 ports, which is for all link speeds. > + * > + * 2. PHY_INTERFACE_MODE_2500BASEX utilizes PCS0 for the > + * fourth port, which is only for the link speed 2500M same > + * as QCA8081. > + * > + * 3. PHY_INTERFACE_MODE_SGMII utilizes PCS0 for the fourth > + * port, which is for the link speed 10M, 100M and 1000M same > + * as QCA8081. > + */ How are these 3 modes configured? I don't see any software configuration of this in these drivers. Can it only by configured by strapping? I think there should be some validation of the phydev->interface mode. Are ports 1-3 set to PHY_INTERFACE_MODE_10G_QXGMII? Is port 4 interface mode consistent with the strapping? Andrew
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