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net: stmmac: Add support for RZN1 GMAC devices

From:  Romain Gantois <romain.gantois-AT-bootlin.com>
To:  "David S. Miller" <davem-AT-davemloft.net>, Eric Dumazet <edumazet-AT-google.com>, Jakub Kicinski <kuba-AT-kernel.org>, Paolo Abeni <pabeni-AT-redhat.com>, Rob Herring <robh-AT-kernel.org>, Krzysztof Kozlowski <krzysztof.kozlowski+dt-AT-linaro.org>, Conor Dooley <conor+dt-AT-kernel.org>, Geert Uytterhoeven <geert+renesas-AT-glider.be>, Magnus Damm <magnus.damm-AT-gmail.com>, Alexandre Torgue <alexandre.torgue-AT-foss.st.com>, Jose Abreu <joabreu-AT-synopsys.com>, Maxime Coquelin <mcoquelin.stm32-AT-gmail.com>, Russell King <linux-AT-armlinux.org.uk>, Clément Léger <clement.leger-AT-bootlin.com>
Subject:  [PATCH net-next v2 0/5] net: stmmac: Add support for RZN1 GMAC devices
Date:  Tue, 09 Apr 2024 11:21:43 +0200
Message-ID:  <20240409-rzn1-gmac1-v2-0-79ca45f2fc79@bootlin.com>
Cc:  Thomas Petazzoni <thomas.petazzoni-AT-bootlin.com>, netdev-AT-vger.kernel.org, devicetree-AT-vger.kernel.org, linux-kernel-AT-vger.kernel.org, linux-renesas-soc-AT-vger.kernel.org, linux-stm32-AT-st-md-mailman.stormreply.com, linux-arm-kernel-AT-lists.infradead.org, Romain Gantois <romain.gantois-AT-bootlin.com>, "Russell King (Oracle)" <rmk+kernel-AT-armlinux.org.uk>, Maxime Chevallier <maxime.chevallier-AT-bootlin.com>
Archive-link:  Article

Hello everyone,

This is version two 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-v6-0-24a7...

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 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-v1-0-5be2b2...

---
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

 .../devicetree/bindings/net/renesas,rzn1-gmac.yaml |  66 +++++++++++++
 MAINTAINERS                                        |   6 ++
 arch/arm/boot/dts/renesas/r9a06g032.dtsi           |  19 ++++
 drivers/net/ethernet/stmicro/stmmac/Kconfig        |  12 +++
 drivers/net/ethernet/stmicro/stmmac/Makefile       |   1 +
 drivers/net/ethernet/stmicro/stmmac/dwmac-rzn1.c   |  88 +++++++++++++++++
 .../net/ethernet/stmicro/stmmac/dwmac-socfpga.c    | 109 +++++++++++----------
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c  |  14 +++
 include/linux/stmmac.h                             |   2 +
 9 files changed, 263 insertions(+), 54 deletions(-)
---
base-commit: 87c33315af380ca12a2e59ac94edad4fe0481b4c
change-id: 20240402-rzn1-gmac1-685cf8793d0e

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




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