From: Michael Walle <mich...@walle.cc> Date: Wed, 13 May 2020 22:38:07 +0200
> The AR8031/AR8033 and the AR8035 support cable diagnostics. Adding > driver support is straightforward, so lets add it. > > The PHY just do one pair at a time, so we have to start the test four > times. The cable_test_get_status() can block and therefore we can just > busy poll the test completion and continue with the next pair until we > are done. > The time delta counter seems to run at 125MHz which just gives us a > resolution of about 82.4cm per tick. > > 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 A, fault length: 107.94m > Pair: Pair B, result: Open Circuit > Pair: Pair B, fault length: 104.64m > Pair: Pair C, result: Open Circuit > Pair: Pair C, fault length: 105.47m > Pair: Pair D, result: Open Circuit > Pair: Pair D, fault length: 107.94m > > 1m cable, A/B connected, 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 C, fault length: 0.82m > Pair: Pair D, result: Open Circuit > Pair: Pair D, fault length: 0.82m > > Signed-off-by: Michael Walle <mich...@walle.cc> > Reviewed-by: Andrew Lunn <and...@lunn.ch> Applied, thanks.
