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Message-ID: <92fddcd0-7764-9d9e-8bd3-9fd6cdaba2f0@gmail.com>
Date:   Wed, 13 May 2020 12:34:27 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     Oleksij Rempel <o.rempel@...gutronix.de>,
        Andrew Lunn <andrew@...n.ch>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Mark Rutland <mark.rutland@....com>,
        Rob Herring <robh+dt@...nel.org>
Cc:     Pengutronix Kernel Team <kernel@...gutronix.de>,
        linux-kernel@...r.kernel.org,
        "David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
        Marek Vasut <marex@...x.de>, David Jander <david@...tonic.nl>,
        devicetree@...r.kernel.org
Subject: Re: [PATCH net-next v1] net: phy: tja11xx: add cable-test support



On 5/13/2020 5:34 AM, Oleksij Rempel wrote:
> Add initial cable testing support.
> This PHY needs only 100usec for this test and it is recommended to run it
> before the link is up. For now, provide at least ethtool support, so it
> can be tested by more developers.
> 
> This patch was tested with TJA1102 PHY with following results:
> - No cable, is detected as open
> - 1m cable, with no connected other end and detected as open
> - a 40m cable (out of spec, max lenght should be 15m) is detected as OK.
> 
> Current patch do not provide polarity test support. This test would
> indicate not proper wire connection, where "+" wire of main phy is
> connected to the "-" wire of the link partner.
> 
> Signed-off-by: Oleksij Rempel <o.rempel@...gutronix.de>

Reviewed-by: Florian Fainelli <f.fainelli@...il.com>
-- 
Florian

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