[PATCH net-next v2 0/2] net: stmmac: Add RK3572 support

[Cunhao Lu via B4 Relay]

This is one of the subsystem submissions for RK3572 support.

This series adds the RK3572 GMAC bindings and support for both Ethernet
controllers in the Rockchip stmmac glue driver. It provides RGMII and
RMII mode and clock control, together with RGMII delay configuration.

The RK3572 SoC has eight CPU cores: two Cortex-A73 cores and six
Cortex-A53 cores. It also integrates an Arm Mali-G310V2 MC1 GPU.
The OK3572-C board provides two Gigabit Ethernet ports, three USB3 Type-A
ports, a Type-C dual-role port, eMMC, microSD, and UART.

Testing was performed with Debian 13 minimal and Linux 7.3 on the
OK3572-C with the FET3572-C module.

Passed functionality:

- SD and eMMC complete the firmware, kernel, and root filesystem
  boot chain.
- UART console works at 1500000 baud.
- SD read/write and data persistence checks pass.
- All eight CPUs start; CPU frequency scaling and hotplug checks pass.
- Both Ethernet ports obtain IPv4 addresses and pass bidirectional file
  transfers.
- All three Type-A ports pass USB2 and USB3 enumeration, data transfers,
  and reconnect persistence checks.
- Type-C host and device modes pass in both plug orientations. Physical
  reconnects correctly select the expected device, host, and device roles
  in sequence.

Stability:

- Repeated cold and software reboots complete on SD and eMMC without data
  integrity failures.
- A combined CPU, memory, network, SD, and USB3 stress test completes
  without a crash, lockup, CPU offline event, or thermal shutdown.
- Ethernet error and drop counters do not increase during bidirectional
  network tests.

Build and checks:

- The kernel, modules, and board DTB build successfully.
- The series passes checkpatch with --strict.

Untested hardware and paths:

- NPU
- PCIe
- GPU, video output, and audio
- Other low-speed external interfaces

Some files in this series are derived from the Forlinx OK3572-C BSP
Alpha1. Thanks to Forlinx for their support.

AI assistance:

- Codex / DeepSeek V4.1 Flash were used for:
  - Reviewing and adjusting code style to follow community conventions
  - Automating tests
  - Collecting data

Signed-off-by: Cunhao Lu <1579567540@xxxxxx>
---
Changes in v2:
- Split the original RK3572 support series by subsystem.
- Add rockchip,rk3572-gmac to the shared Synopsys compatible list in
  snps,dwmac.yaml.
- Link to v1:
  https://patch.msgid.link/20261022-add-board-ok3572-c-v1-0-0b0fd85a31ee@xxxxxx

---
Raw dmesg: see the v1 cover letter.

To: Andrew Lunn <andrew+netdev@xxxxxxx>
To: "David S. Miller" <davem@xxxxxxxxxxxxx>
To: Eric Dumazet <edumazet@xxxxxxxxxx>
To: Jakub Kicinski <kuba@xxxxxxxxxx>
To: Paolo Abeni <pabeni@xxxxxxxxxx>
To: Rob Herring <robh@xxxxxxxxxx>
To: Krzysztof Kozlowski <krzk+dt@xxxxxxxxxx>
To: Conor Dooley <conor+dt@xxxxxxxxxx>
To: Heiko Stuebner <heiko@xxxxxxxxx>
To: David Wu <david.wu@xxxxxxxxxxxxxx>
To: Alexandre Torgue <alexandre.torgue@xxxxxxxxxxx>
To: Giuseppe Cavallaro <peppe.cavallaro@xxxxxx>
To: Jose Abreu <joabreu@xxxxxxxxxxxx>
To: Maxime Chevallier <maxime.chevallier@xxxxxxxxxxx>
To: Maxime Coquelin <mcoquelin.stm32@xxxxxxxxx>
Cc: netdev@xxxxxxxxxxxxxxx
Cc: devicetree@xxxxxxxxxxxxxxx
Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
Cc: linux-rockchip@xxxxxxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
Cc: linux-stm32@xxxxxxxxxxxxxxxxxxxxxxxxxxxx

---
Cunhao Lu (2):
      dt-bindings: net: rockchip-dwmac: Add RK3572
      net: stmmac: dwmac-rk: Add RK3572 support

 .../devicetree/bindings/net/rockchip-dwmac.yaml    |  3 ++
 .../devicetree/bindings/net/snps,dwmac.yaml        |  1 +
 drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c     | 53 ++++++++++++++++++++++
 3 files changed, 57 insertions(+)
---
base-commit: 067c5c24cef23d913b67eaaf71ae67e7169a6620
change-id: 20261111-add-board-ok3572-c-net-4d45887c575f

Best regards,
--  
Cunhao Lu <1579567540@xxxxxx>