[PATCH net-next v3 0/4] net: Introduce QUSGMII phy mode

[Maxime Chevallier]

Hello everyone,

This is the V3 of a previous series [1] initially aimed at introducing
inband extensions, with modes like QUSGMII. This mode allows passing
info in the ethernet preamble between the MAC and the PHY, such s
timestamps.

This series has now become a preliminary series, that simply introduces
the new interface mode, without support for inband extensions, that will
come later.

The reasonning is that work will need to be done in the networking
subsystem, but also in the generic phy driver subsystem to allow serdes
configuration for qusgmii.

This series add the mode, the relevant binding changes, adds support for
it in the lan966x driver, and also introduces a small helper to get the
number of links a given phy mode can carry (think 1 for SGMII and 4 for
QSGMII). This allows for better readability and will prove useful
when (if) we support PSGMII (5 links on 1 interface) and OUSGMII (8
links on one interface).

V3 includes small fixups on the ports-per-interface assignment and some
missing documentation, thanks Andrew and Florian for the review !

Best regards,

Maxime

[1] : https://lore.kernel.org/netdev/20220519135647.465653-1-maxime.chevallier@xxxxxxxxxxx/

Maxime Chevallier (4):
  net: phy: Introduce QUSGMII PHY mode
  dt-bindings: net: ethernet-controller: add QUSGMII mode
  net: phy: Add helper to derive the number of ports from a phy mode
  net: lan966x: Add QUSGMII support for lan966x

 .../bindings/net/ethernet-controller.yaml     |  1 +
 Documentation/networking/phy.rst              |  9 ++++
 .../ethernet/microchip/lan966x/lan966x_main.c |  2 +
 .../microchip/lan966x/lan966x_phylink.c       |  3 +-
 .../ethernet/microchip/lan966x/lan966x_port.c | 22 +++++---
 .../ethernet/microchip/lan966x/lan966x_regs.h |  6 +++
 drivers/net/phy/phy-core.c                    | 52 +++++++++++++++++++
 drivers/net/phy/phylink.c                     |  3 ++
 include/linux/phy.h                           |  6 +++
 9 files changed, 97 insertions(+), 7 deletions(-)

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2.37.1