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Date: Sun, 3 Jan 2021 02:25:42 +0100 From: Martin Blumenstingl <martin.blumenstingl@...glemail.com> To: hauke@...ke-m.de, netdev@...r.kernel.org Cc: andrew@...n.ch, vivien.didelot@...il.com, f.fainelli@...il.com, olteanv@...il.com, davem@...emloft.net, kuba@...nel.org, linux-kernel@...r.kernel.org, Martin Blumenstingl <martin.blumenstingl@...glemail.com> Subject: [PATCH 0/2] net: dsa: lantiq_gswip: two fixes for -net/-stable While testing the lantiq_gswip driver in OpenWrt at least one board had a non-working Ethernet port connected to an internal 100Mbit/s PHY22F GPHY. The problem which could be observed: - the PHY would detect the link just fine - ethtool stats would see the TX counter rise - the RX counter in ethtool was stuck at zero It turns out that two independent patches are needed to fix this: - first we need to enable the MII data lines also for internal PHYs - second we need to program the GSWIP_MII_CFG registers for all ports except the CPU port These two patches have also been tested by back-porting them on top of Linux 5.4.86 in OpenWrt. Special thanks to Hauke for debugging and brainstorming this on IRC with me! Martin Blumenstingl (2): net: dsa: lantiq_gswip: Enable GSWIP_MII_CFG_EN also for internal PHYs net: dsa: lantiq_gswip: Fix GSWIP_MII_CFG(p) register access drivers/net/dsa/lantiq_gswip.c | 27 +++++++-------------------- 1 file changed, 7 insertions(+), 20 deletions(-) -- 2.30.0
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