Subject: [PATCH net-next v4 0/5] net: phy: add Lynx PCS MDIO module

Add support for the Lynx PCS as a separate module in drivers/net/phy/.
The advantage of this structure is that multiple ethernet or switch drivers used
on NXP hardware (ENETC, Seville, Felix DSA switch etc) can share the same
implementation of PCS configuration and runtime management.

The module implements phylink_pcs_ops and exports a phylink_pcs
(incorporated into a lynx_pcs) which can be directly passed to phylink through
phylink_pcs_set.

The first 3 patches add some missing pieces in phylink and the locked mdiobus
write accessor. Next, the Lynx PCS MDIO module is added as a standalone
module. The majority of the code is extracted from the Felix DSA driver. The last
patch makes the necessary changes in the Felix and Seville drivers in order to use
the new common PCS implementation.

At the moment, USXGMII (only with in-band AN), SGMII, QSGMII (with and
without in-band AN) and 2500Base-X (only w/o in-band AN) are supported by the
Lynx PCS MDIO module since these were also supported by Felix and no
functional change is intended at this time.

Any feedback on the use of phylink_pcs?

Thanks,
Ioana

Changes in v2:
 * got rid of the mdio_lynx_pcs structure and directly exported the  functions
without the need of an indirection
 * made the necessary adjustments for this in the Felix DSA driver
 * solved the broken allmodconfig build test by making the module  tristate
instead of bool
 * fixed a memory leakage in the Felix driver (the pcs structure was  allocated
twice)

Changes in v3:
 * added support for PHYLINK PCS ops in DSA (patch 5/9)
 * cleanup in Felix PHYLINK operations and migrate to
 phylink_mac_link_up() being the callback of choice for applying MAC
configuration (patches 6-8)

Changes in v4:
 * use the newly introduced phylink PCS mechanism
 * install the phylink_pcs in the phylink_mac_config DSA ops
 * remove the direct implementations of the PCS ops
 * do no use the SGMII_ prefix when referring to the IF_MORE register
 * add a phylink helper to decode the USXGMII code word
 * remove cleanup patches for Felix (these have been already accepted)
 * Seville (recently introduced) now has PCS support through the same  Lynx PCS
module

Ioana Ciornei (5):
  net: phylink: add helper function to decode USXGMII word
  net: phylink: consider QSGMII interface mode in
    phylink_mii_c22_pcs_get_state
  net: mdiobus: add clause 45 mdiobus write accessor
  net: phy: add Lynx PCS module
  net: dsa: ocelot: use the Lynx PCS helpers in Felix and Seville

 MAINTAINERS                              |   7 +
 drivers/net/dsa/ocelot/Kconfig           |   1 +
 drivers/net/dsa/ocelot/felix.c           |  28 +-
 drivers/net/dsa/ocelot/felix.h           |  20 +-
 drivers/net/dsa/ocelot/felix_vsc9959.c   | 374 ++---------------------
 drivers/net/dsa/ocelot/seville_vsc9953.c |  21 +-
 drivers/net/phy/Kconfig                  |   6 +
 drivers/net/phy/Makefile                 |   1 +
 drivers/net/phy/pcs-lynx.c               | 314 +++++++++++++++++++
 drivers/net/phy/phylink.c                |  44 +++
 include/linux/mdio.h                     |   6 +
 include/linux/pcs-lynx.h                 |  21 ++
 include/linux/phylink.h                  |   3 +
 13 files changed, 442 insertions(+), 404 deletions(-)  create mode 100644
drivers/net/phy/pcs-lynx.c  create mode 100644 include/linux/pcs-lynx.h

--
2.25.1