net: pcs: lynx: enable autonegotiation for 10g-qxgmii and usxgmii

Browse source

The Lynx PCS setup for 10g-qxgmii and usxgmii programs the
USXGMII replicator advertisement, but does not explicitly enable and
restart in-band autonegotiation or program the replicator link timers.

This leaves the PCS dependent on firmware or bootloader state. Systems
which do not get the USXGMII replicator preconfigured before Linux may
therefore fail to negotiate the link correctly.

After programming the USXGMII device ability, configure the replicator
BMCR with reset, autonegotiation enable and autonegotiation restart. Also
program the replicator link timer registers using the value returned by
phylink_get_link_timer_ns().

Co-developed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: Patryk Biel <pbiel7@gmail.com>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Link: https://patch.msgid.link/20260923-b4-fix-pcs-lynx-an-v4-1-3f7927606d12@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

...

This commit is contained in:

Patryk Biel 2026-09-23 18:14:12 +02:00 • committed by Jakub Kicinski

parent 0fd5dfa99c

commit a0dfaa3ecd

1 changed files with 49 additions and 4 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

53

drivers/net/pcs/pcs-lynx.c

View file