linux-kernel - RE: Re: signal quality and cable diagnostic

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Message-ID: <AM0PR04MB70410EA61C984E45615CCF8B86A10@AM0PR04MB7041.eurprd04.prod.outlook.com>
Date:   Mon, 11 May 2020 19:32:05 +0000
From:   Christian Herber <christian.herber@....com>
To:     Andrew Lunn <andrew@...n.ch>,
        Oleksij Rempel <o.rempel@...gutronix.de>
CC:     "David S. Miller" <davem@...emloft.net>,
        Florian Fainelli <f.fainelli@...il.com>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Jonathan Corbet <corbet@....net>,
        Michal Kubecek <mkubecek@...e.cz>,
        David Jander <david@...tonic.nl>,
        "kernel@...gutronix.de" <kernel@...gutronix.de>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        Russell King <linux@...linux.org.uk>,
        "mkl@...gutronix.de" <mkl@...gutronix.de>,
        Marek Vasut <marex@...x.de>
Subject: RE: Re: signal quality and cable diagnostic

On May 11, 2020 4:33:53 PM Andrew Lunn <andrew@...n.ch> wrote:
>
> Are the classes part of the Open Alliance specification? Ideally we
> want to report something standardized, not something proprietary to
> NXP.
>
>        Andrew

Hi Andrew,

Such mechanisms are standardized and supported by pretty much all devices in the market. The Open Alliance specification is publicly available here: http://www.opensig.org/download/document/218/Advanced_PHY_features_for_automotive_Ethernet_V1.0.pdf

As the specification is newer than the 100BASE-T1 spec, do not expect first generation devices to follow the register definitions as per Open Alliance. But for future devices, also registers should be same across different vendors.

Christian