linux-kernel - [PATCH net-next v7 0/7] net: stmmac: Add support for RZN1 GMAC devices

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Message-Id: <20240513-rzn1-gmac1-v7-0-6acf58b5440d@bootlin.com>
Date: Mon, 13 May 2024 09:25:11 +0200
From: Romain Gantois <romain.gantois@...tlin.com>
To: "David S. Miller" <davem@...emloft.net>, 
 Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, 
 Paolo Abeni <pabeni@...hat.com>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, 
 Conor Dooley <conor+dt@...nel.org>, 
 Geert Uytterhoeven <geert+renesas@...der.be>, 
 Magnus Damm <magnus.damm@...il.com>, 
 Alexandre Torgue <alexandre.torgue@...s.st.com>, 
 Jose Abreu <joabreu@...opsys.com>, 
 Maxime Coquelin <mcoquelin.stm32@...il.com>, 
 Russell King <linux@...linux.org.uk>, 
 Clément Léger <clement.leger@...tlin.com>, 
 Serge Semin <fancer.lancer@...il.com>
Cc: Thomas Petazzoni <thomas.petazzoni@...tlin.com>, netdev@...r.kernel.org, 
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-renesas-soc@...r.kernel.org, linux-stm32@...md-mailman.stormreply.com, 
 linux-arm-kernel@...ts.infradead.org, 
 Romain Gantois <romain.gantois@...tlin.com>, 
 "Russell King (Oracle)" <rmk+kernel@...linux.org.uk>, 
 Maxime Chevallier <maxime.chevallier@...tlin.com>
Subject: [PATCH net-next v7 0/7] net: stmmac: Add support for RZN1 GMAC
 devices

Hello everyone,

This is version seven of my series that adds support for a Gigabit Ethernet
controller featured in the Renesas r9a06g032 SoC, of the RZ/N1 family. This
GMAC device is based on a Synopsys IP and is compatible with the stmmac driver.

My former colleague Clément Léger originally sent a series for this driver,
but an issue in bringing up the PCS clock had blocked the upstreaming
process. This issue has since been resolved by the following series:

https://lore.kernel.org/all/20240326-rxc_bugfix-v6-0-24a74e5c761f@bootlin.com/

This series consists of a devicetree binding describing the RZN1 GMAC
controller IP, a node for the GMAC1 device in the r9a06g032 SoC device
tree, and the GMAC driver itself which is a glue layer in stmmac.

There are also two patches by Russell that improve pcs initialization handling
in stmmac.

Best Regards,

Romain Gantois

---
Changes in v7:
- Fixed potential uninitialized use in stmmac_pcs_setup()
- Link to v6: https://lore.kernel.org/r/20240510-rzn1-gmac1-v6-0-b63942be334c@bootlin.com

Changes in v6:
- Changed stmmac_pcs_clean() prototype to match stmmac_pcs_setup()
- Link to v5: https://lore.kernel.org/r/20240430-rzn1-gmac1-v5-0-62f65a84f418@bootlin.com

Changes in v5:
- Refactored the stmmac_xpcs_setup() function to group together XPCS and PCS
  setup logic.
- Added a stmmac_pcs_clean() function as a counterpart to stmmac_pcs_setup()
- Link to v4: https://lore.kernel.org/r/20240424-rzn1-gmac1-v4-0-852a5f2ce0c0@bootlin.com

Changes in v4:
- Removed the second parameters of the new pcs_init/exit() callbacks
- Removed unnecessary interrupt-parent reference in gmac1 device node
- Link to v3: https://lore.kernel.org/r/20240415-rzn1-gmac1-v3-0-ab12f2c4401d@bootlin.com

Changes in v3:
- Fixed a typo in the socfpga patch
- Link to v2: https://lore.kernel.org/r/20240409-rzn1-gmac1-v2-0-79ca45f2fc79@bootlin.com

Changes in v2:
- Add pcs_init/exit callbacks in stmmac to solve race condition
- Use pcs_init/exit callbacks in dwmac_socfpga glue layer
- Miscellaneous device tree binding corrections
- Link to v1: https://lore.kernel.org/r/20240402-rzn1-gmac1-v1-0-5be2b2894d8c@bootlin.com

---
Clément Léger (3):
      dt-bindings: net: renesas,rzn1-gmac: Document RZ/N1 GMAC support
      net: stmmac: add support for RZ/N1 GMAC
      ARM: dts: r9a06g032: describe GMAC1

Russell King (Oracle) (2):
      net: stmmac: introduce pcs_init/pcs_exit stmmac operations
      net: stmmac: dwmac-socfpga: use pcs_init/pcs_exit

Serge Semin (2):
      net: stmmac: Add dedicated XPCS cleanup method
      net: stmmac: Make stmmac_xpcs_setup() generic to all PCS devices

 .../devicetree/bindings/net/renesas,rzn1-gmac.yaml |  66 +++++++++++++
 MAINTAINERS                                        |   6 ++
 arch/arm/boot/dts/renesas/r9a06g032.dtsi           |  18 ++++
 drivers/net/ethernet/stmicro/stmmac/Kconfig        |  12 +++
 drivers/net/ethernet/stmicro/stmmac/Makefile       |   1 +
 drivers/net/ethernet/stmicro/stmmac/dwmac-rzn1.c   |  86 +++++++++++++++++
 .../net/ethernet/stmicro/stmmac/dwmac-socfpga.c    | 107 ++++++++++-----------
 drivers/net/ethernet/stmicro/stmmac/stmmac.h       |   3 +-
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c  |  14 +--
 drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c  |  52 +++++++---
 include/linux/stmmac.h                             |   2 +
 11 files changed, 290 insertions(+), 77 deletions(-)
---
base-commit: cddd2dc6390b90e62cec2768424d1d90f6d04161
change-id: 20240402-rzn1-gmac1-685cf8793d0e

Best regards,
-- 
Romain Gantois <romain.gantois@...tlin.com>