linux-kernel - [PATCH net-next 0/4] net: add a regmap-based mdio driver and drop TSE PCS

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Message-Id: <20230524130807.310089-1-maxime.chevallier@bootlin.com>
Date:   Wed, 24 May 2023 15:08:03 +0200
From:   Maxime Chevallier <maxime.chevallier@...tlin.com>
To:     Mark Brown <broonie@...nel.org>, davem@...emloft.net
Cc:     Maxime Chevallier <maxime.chevallier@...tlin.com>,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        alexis.lothore@...tlin.com, thomas.petazzoni@...tlin.com,
        Andrew Lunn <andrew@...n.ch>, Jakub Kicinski <kuba@...nel.org>,
        Eric Dumazet <edumazet@...gle.com>,
        Paolo Abeni <pabeni@...hat.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Russell King <linux@...linux.org.uk>,
        Vladimir Oltean <vladimir.oltean@....com>,
        Ioana Ciornei <ioana.ciornei@....com>,
        linux-stm32@...md-mailman.stormreply.com,
        linux-arm-kernel@...ts.infradead.org,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Jose Abreu <joabreu@...opsys.com>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        Giuseppe Cavallaro <peppe.cavallaro@...com>
Subject: [PATCH net-next 0/4] net: add a regmap-based mdio driver and drop TSE PCS

Hello everyone,

This series follows-up on the worki [1] aiming at dropping the altera TSE PCS
driver, as it turns out to be a version of the Lynx PCS exposed as a
memory-mapped block, instead of living on an MDIO bus.

One step of this removal involved creating a regmap-based mdio driver
that translates MDIO accesses into the actual underlying bus that
exposes the register. The register layout must of course match the
standard MDIO layout, but we can now account for differences in stride
with recent work on the regmap subsystem [2].

Mark, Net maintainers, this series depends on the patch e12ff2876493 that was
recently merged into the regmap tree [3].

For this series to be usable in net-next, this patch must be applied
beforehand. Should Mark create a tag that would then be merged into
net-next ?

This series introduces a new MDIO driver, and uses it to convert Altera
TSE from the actual TSE PCS driver to Lynx PCS.

Since it turns out dwmac_socfpga also uses a TSE PCS block, port that
driver to Lynx as well.

Thanks,

Maxime

[1] : https://lore.kernel.org/all/20230324093644.464704-1-maxime.chevallier@bootlin.com/
[2] : https://lore.kernel.org/all/20230407152604.105467-1-maxime.chevallier@bootlin.com/#t
[3] : https://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap.git/commit/?id=e12ff28764937dd58c8613f16065da60da149048

Maxime Chevallier (4):
  net: mdio: Introduce a regmap-based mdio driver
  net: ethernet: altera-tse: Convert to mdio-regmap and use PCS Lynx
  net: pcs: Drop the TSE PCS driver
  net: stmmac: dwmac-sogfpga: use the lynx pcs driver

 MAINTAINERS                                   |  14 +-
 drivers/net/ethernet/altera/Kconfig           |   2 +
 drivers/net/ethernet/altera/altera_tse.h      |   1 +
 drivers/net/ethernet/altera/altera_tse_main.c |  57 +++-
 drivers/net/ethernet/stmicro/stmmac/Kconfig   |   1 +
 drivers/net/ethernet/stmicro/stmmac/Makefile  |   2 +-
 .../ethernet/stmicro/stmmac/altr_tse_pcs.c    | 257 ------------------
 .../ethernet/stmicro/stmmac/altr_tse_pcs.h    |  29 --
 drivers/net/ethernet/stmicro/stmmac/common.h  |   1 +
 .../ethernet/stmicro/stmmac/dwmac-socfpga.c   |  90 ++++--
 .../net/ethernet/stmicro/stmmac/stmmac_main.c |  12 +-
 drivers/net/mdio/Kconfig                      |  10 +
 drivers/net/mdio/Makefile                     |   1 +
 drivers/net/mdio/mdio-regmap.c                |  85 ++++++
 drivers/net/pcs/Kconfig                       |   6 -
 drivers/net/pcs/Makefile                      |   1 -
 drivers/net/pcs/pcs-altera-tse.c              | 160 -----------
 include/linux/mdio/mdio-regmap.h              |  25 ++
 include/linux/pcs-altera-tse.h                |  17 --
 19 files changed, 258 insertions(+), 513 deletions(-)
 delete mode 100644 drivers/net/ethernet/stmicro/stmmac/altr_tse_pcs.c
 delete mode 100644 drivers/net/ethernet/stmicro/stmmac/altr_tse_pcs.h
 create mode 100644 drivers/net/mdio/mdio-regmap.c
 delete mode 100644 drivers/net/pcs/pcs-altera-tse.c
 create mode 100644 include/linux/mdio/mdio-regmap.h
 delete mode 100644 include/linux/pcs-altera-tse.h

-- 
2.40.1