linux-kernel - Re: [net-next RFC PATCH 03/14] dt-bindings: net: document ethernet PHY package nodes

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Message-ID: <ZV9jM7ve3Kl6ZxSl@shell.armlinux.org.uk>
Date:   Thu, 23 Nov 2023 14:35:31 +0000
From:   "Russell King (Oracle)" <linux@...linux.org.uk>
To:     Andrew Lunn <andrew@...n.ch>
Cc:     Christian Marangi <ansuelsmth@...il.com>,
        Rob Herring <robh@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Florian Fainelli <florian.fainelli@...adcom.com>,
        Broadcom internal kernel review list 
        <bcm-kernel-feedback-list@...adcom.com>,
        Daniel Golle <daniel@...rotopia.org>,
        Qingfang Deng <dqfext@...il.com>,
        SkyLake Huang <SkyLake.Huang@...iatek.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        David Epping <david.epping@...singlinkelectronics.com>,
        Vladimir Oltean <olteanv@...il.com>,
        Harini Katakam <harini.katakam@....com>,
        Simon Horman <horms@...nel.org>,
        Robert Marko <robert.marko@...tura.hr>, netdev@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org
Subject: Re: [net-next RFC PATCH 03/14] dt-bindings: net: document ethernet
 PHY package nodes

On Thu, Nov 23, 2023 at 03:27:05PM +0100, Andrew Lunn wrote:
> > Just to be more precise qca807x can operate in 3 different mode:
> > (this is controlled by the MODE_CFG bits)
> 
> > - QSGMII: 5 copper port
> 
> 4 slots over QSGMII, plus the second SERDES is connected to the MAC
> using SGMII/1000BaseX?
> 
> > - PSGMII: 5 copper port
> 
> 5 slots over QSGMII, the second SERDES is idle?
> 
> > - PSGMII: 4 copper port + 1 combo (that can be both fiber or copper)
> 
> 5 slots over QSGMII, with the second SERDES connected to an SFP cage.
> 
> Are ports 1-4 always connected to the P/Q SGMII. Its only port 5 which
> can use the second SERDES?

I think what would really help here is if there was an ascii table to
describe the configurations, rather than trying to put it into words.

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
FTTP is here! 80Mbps down 10Mbps up. Decent connectivity at last!