Add support for Nuvoton MA35D1 GMAC

From:		Joey Lu <a0987203069-AT-gmail.com>
To:		andrew+netdev-AT-lunn.ch, davem-AT-davemloft.net, edumazet-AT-google.com, kuba-AT-kernel.org, pabeni-AT-redhat.com, robh-AT-kernel.org, krzk+dt-AT-kernel.org, conor+dt-AT-kernel.org, mcoquelin.stm32-AT-gmail.com, richardcochran-AT-gmail.com
Subject:		[PATCH net-next v10 0/3] Add support for Nuvoton MA35D1 GMAC
Date:		Thu, 29 Jan 2026 13:44:42 +0800
Message-ID:		<20260129054445.416242-1-a0987203069@gmail.com>
Cc:		alexandre.torgue-AT-foss.st.com, joabreu-AT-synopsys.com, ychuang3-AT-nuvoton.com, schung-AT-nuvoton.com, yclu4-AT-nuvoton.com, peppe.cavallaro-AT-st.com, linux-arm-kernel-AT-lists.infradead.org, netdev-AT-vger.kernel.org, devicetree-AT-vger.kernel.org, linux-kernel-AT-vger.kernel.org, openbmc-AT-lists.ozlabs.org, linux-stm32-AT-st-md-mailman.stormreply.com, Joey Lu <a0987203069-AT-gmail.com>
Archive-link:		Article

This patch series is submitted to add GMAC support for Nuvoton MA35D1
SoC platform. This work involves implementing a GMAC driver glue layer
based on Synopsys DWMAC driver framework to leverage MA35D1's dual GMAC
interface capabilities.

Overview:
  1. Added a GMAC driver glue layer for MA35D1 SoC, providing support for
  the platform's two GMAC interfaces.
  2. Added device tree settings, with specific configurations for our
  development boards:
    a. SOM board: Configured for two RGMII interfaces.
    b. IoT board: Configured with one RGMII and one RMII interface.
  3. Added dt-bindings for the GMAC interfaces.

v10:
  - Update DTS/DTSI files to follow proper hierarchy and port modeling

v9:
  - Fixed file permissions. (YAML, driver, DTS)
  - Moved phy-handle and PHY-related properties from SoC dtsi to board dts.

v8:
  Changes since v7:
  - Rebased onto the latest net-next.
  - Removed unused symbol.
  - stmmac parent driver now reads hardware features directly to support
    Wake-on-LAN via magic packet, so PMT-related overrides in this driver
    have been removed.
  - Update dwmac-nuvoton driver:
      - Update the license to GPL.
      - Improve the description in Kconfig.

v7:
  - Update dwmac-nuvoton driver
    - Update probe function to use stmmac_pltfr_probe instead.

v6:
  - Update dwmac-nuvoton driver
    - Use NVT as the previx for all functions, structs, and defines.
    - Remove unnecessary comments.

v5:
  - Update yaml
    - Remove the properties already defined in snps dwmac.
  - Update dwmac-nuvoton driver
    - Add a comment to explain the override of PMT flag.

v4:
  - Update yaml
    - Remove unnecessary property 'select'.
    - Remove unnecessary compatible entries and fix items.
    - Specify number of entries for 'reg'.
    - Remove already defined property 'phy-handle'.
    - Update example.
    - Modify the property internal path delay to match the driver.
  - Update dtsi
    - Move 'status' to be the last property.
  - Update dwmac-nuvoton driver
    - Use remove instead of remove_new.
    - Use dev_err_probe instead.

v3:
  - Update yaml
    - Fix for dt_binding_check warnings & errors.
    - Add compatible in snps dwmac.
  - Update dtsi
    - Update dtsi to follow examples in yaml.
  - Update dwmac-nuvoton driver
    - Fix for auto build test warnings.
    - Invalid path delay arguments will be returned.

v2:
  - Update yaml
    - Rename file to align with the compatible property.
    - Add an argument to syscon to replace mac-id,
      with corresponding descriptions.
    - Use tx-internal-delay-ps and rx-internal-delay-ps properties for
      configurable path delay with corresponding descriptions,
      allowing selection between GMAC internal and PHY.
    - Add all supported phy-mode options.
    - Remove unused properties.
  - Update dtsi
    - Modify syscon configuration to include an argument for
      GMAC interface selection.
  - Update dwmac-nuvoton driver
    - Remove redundant device information print statements.
    - Remove non-global parameters.
    - Retrieve GMAC interface selection from the syscon argument.
    - Parse Tx and Rx path delays by correct properties.
    - Update configurations to support Wake-on-LAN.

Joey Lu (3):
  dt-bindings: net: nuvoton: Add schema for Nuvoton MA35 family GMAC
  arm64: dts: nuvoton: Add Ethernet nodes
  net: stmmac: dwmac-nuvoton: Add dwmac glue for Nuvoton MA35 family

 .../bindings/net/nuvoton,ma35d1-dwmac.yaml    | 126 +++++++++++++
 .../devicetree/bindings/net/snps,dwmac.yaml   |   1 +
 .../boot/dts/nuvoton/ma35d1-iot-512m.dts      |  25 +++
 .../boot/dts/nuvoton/ma35d1-som-256m.dts      |  24 +++
 arch/arm64/boot/dts/nuvoton/ma35d1.dtsi       |  44 +++++
 drivers/net/ethernet/stmicro/stmmac/Kconfig   |  12 ++
 drivers/net/ethernet/stmicro/stmmac/Makefile  |   1 +
 .../ethernet/stmicro/stmmac/dwmac-nuvoton.c   | 174 ++++++++++++++++++
 8 files changed, 407 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/net/nuvoton,ma35d1-dwmac.yaml
 create mode 100644 drivers/net/ethernet/stmicro/stmmac/dwmac-nuvoton.c

-- 
2.43.0