linux-kernel - Re: [PATCH net-next v1] net: phy: tja11xx: add cable-test support

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Date:   Wed, 13 May 2020 20:01:40 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Oleksij Rempel <o.rempel@...gutronix.de>
Cc:     Mark Rutland <mark.rutland@....com>, Marek Vasut <marex@...x.de>,
        Florian Fainelli <f.fainelli@...il.com>,
        devicetree@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, Rob Herring <robh+dt@...nel.org>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        David Jander <david@...tonic.nl>,
        "David S. Miller" <davem@...emloft.net>,
        Heiner Kallweit <hkallweit1@...il.com>
Subject: Re: [PATCH net-next v1] net: phy: tja11xx: add cable-test support

> What would be the best place to do a test before the link is getting up?
> Can it be done in the phy core, or it should be done in the PHY driver?
> 
> So far, no action except of logging these errors is needed. 

You could do it in the config_aneg callback.

A kernel log entry is not very easy to use. You might want to see how
easy it is to send a cable test result to userspace. Anything which is
interested in this information can then listen for it. All the needed
code is there, you will just need to rearrange it a bit.

	   Andrew