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Date: Sat, 9 May 2020 17:09:13 -0700 From: Florian Fainelli <f.fainelli@...il.com> To: Michael Walle <michael@...le.cc>, netdev@...r.kernel.org, linux-kernel@...r.kernel.org Cc: Andrew Lunn <andrew@...n.ch>, Heiner Kallweit <hkallweit1@...il.com>, Russell King <linux@...linux.org.uk>, "David S . Miller" <davem@...emloft.net> Subject: Re: [PATCH net-next 4/4] net: phy: bcm54140: add cable diagnostics support On 5/9/2020 3:37 PM, Michael Walle wrote: > Use the generic cable tester functions from bcm-phy-lib to add cable > tester support. > > 100m cable, A/B/C/D open: > Cable test started for device eth0. > Cable test completed for device eth0. > Pair: Pair A, result: Open Circuit > Pair: Pair B, result: Open Circuit > Pair: Pair C, result: Open Circuit > Pair: Pair D, result: Open Circuit > Pair: Pair A, fault length: 106.60m > Pair: Pair B, fault length: 103.32m > Pair: Pair C, fault length: 104.96m > Pair: Pair D, fault length: 106.60m > > 1m cable, A/B connected, pair C shorted, D open: > Cable test started for device eth0. > Cable test completed for device eth0. > Pair: Pair A, result: OK > Pair: Pair B, result: OK > Pair: Pair C, result: Short within Pair > Pair: Pair D, result: Open Circuit > Pair: Pair C, fault length: 0.82m > Pair: Pair D, fault length: 1.64m > > 1m cable, A/B connected, pair C shorted with D: > Cable test started for device eth0. > Cable test completed for device eth0. > Pair: Pair A, result: OK > Pair: Pair B, result: OK > Pair: Pair C, result: Short to another pair > Pair: Pair D, result: Short to another pair > Pair: Pair C, fault length: 1.64m > Pair: Pair D, fault length: 1.64m > > The granularity of the length measurement seems to be 82cm. > > Signed-off-by: Michael Walle <michael@...le.cc> Reviewed-by: Florian Fainelli <f.fainelli@...il.com> -- Florian
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