linux-kernel - [PATCH RFC net 0/2] lantiq: GSWIP: two more fixes

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Date:   Tue,  6 Apr 2021 22:35:06 +0200
From:   Martin Blumenstingl <martin.blumenstingl@...glemail.com>
To:     hauke@...ke-m.de, andrew@...n.ch, f.fainelli@...il.com,
        vivien.didelot@...il.com, olteanv@...il.com, netdev@...r.kernel.org
Cc:     davem@...emloft.net, kuba@...nel.org, linux@...linux.org.uk,
        linux-kernel@...r.kernel.org,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>
Subject: [PATCH RFC net 0/2] lantiq: GSWIP: two more fixes

Hello,

after my last patch got accepted and is now in net as commit
3e6fdeb28f4c33 ("net: dsa: lantiq_gswip: Let GSWIP automatically set
the xMII clock") [0] some more people from the OpenWrt community
(many thanks to everyone involved) helped test the GSWIP driver: [1]

It turns out that the previous fix does not work for all boards.
There's no regression, but it doesn't fix as many problems as I
thought. This is why two more fixes are needed:
- the first one solves many (four known but probably there are
  a few extra hidden ones) reported bugs with the GSWIP where no
  traffic would flow. Not all circumstances are fully understood
  but testing shows that switching away from PHY auto polling
  solves all of them
- while investigating the different problems which are addressed
  by the first patch some small issues with the existing code were
  found. These are addressed by the second patch

Why am I sending this as RFC then?
Because I am not sure where to place the link configuration bits
in the first patch (as I don't understand why phylink_mac_config
and also phylink_mac_link_up both have the required parameters
to configure the link, just in differnet formats):
- in gswip_phylink_mac_config
- in gswip_phylink_mac_link_up
- in both

Any feedback is very welcome on this topic!

I have already gotten Hauke's Acked-by off-list. He's Cc'ed so he
can speak up if he changes his opinion or finds some issue with
the patches still.


Best regards,
Martin


[0] https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=3e6fdeb28f4c331acbd27bdb0effc4befd4ef8e8
[1] https://github.com/openwrt/openwrt/pull/3085


Martin Blumenstingl (2):
  net: dsa: lantiq_gswip: Don't use PHY auto polling
  net: dsa: lantiq_gswip: Configure all remaining GSWIP_MII_CFG bits

 drivers/net/dsa/lantiq_gswip.c | 211 ++++++++++++++++++++++++++++-----
 1 file changed, 183 insertions(+), 28 deletions(-)

-- 
2.31.1