[PATCH 0/3] arm64: dts/net: stmmac: Add Agilex5 SoCDK TSN Config2 board support

[muhammad.nazim.amirul.nazle.asmade at altera.com]

From: Nazim Amirul <muhammad.nazim.amirul.nazle.asmade at altera.com>

The Intel SoCFPGA Agilex5 SoCDK TSN Config2 board uses a dual-port
Ethernet setup where gmac1 (TSN port) operates with different MAC-side
and PHY-side interface modes: GMII internally in the MAC, and RGMII
towards the PHY.

Russell King's commit de696c63c1dc ("net: stmmac: socfpga: convert to
use phy_interface") replaced mac_interface with phy_interface in
socfpga_get_plat_phymode(), correctly noting that no upstream DTS files
set the "mac-mode" property at the time. However, the Agilex5 SoCDK
TSN Config2 board requires mac-mode and phy-mode to differ, causing
ping failures when the MAC is configured with RGMII instead of GMII.

This series fixes the issue in three steps:

  Patch 1 (dt-bindings): Add the compatible string for the new board
  variant to Documentation/devicetree/bindings/arm/altera.yaml.

  Patch 2 (dts): Add the device tree source for the Agilex5 SoCDK
  TSN Config2 board, enabling gmac1 with mac-mode = "gmii" alongside
  the standard gmac2 port.

  Patch 3 (driver): Restore mac_interface support in dwmac-socfpga by
  reading the optional "mac-mode" DT property. When absent, it falls
  back to phy_interface, preserving existing behaviour for all other
  boards.

Note: Patches 1 and 2 target Dinh Nguyen's SoCFPGA tree
(git://git.kernel.org/pub/scm/linux/kernel/git/dinguyen/linux.git).
Patch 3 targets net-next.

Nazim Amirul (3):
  dt-bindings: arm: altera: Add Agilex5 SoCDK TSN Config2 board
  arm64: dts: socfpga: agilex5: Add SoCDK TSN Config2 board
  net: stmmac: dwmac-socfpga: Add mac-mode DT property support

 Documentation/devicetree/bindings/arm/altera.yaml            |   1 +
 arch/arm64/boot/dts/intel/Makefile                           |   9 +-
 arch/arm64/boot/dts/intel/socfpga_agilex5_socdk_tsn_cfg2.dts | 133 ++++++++++++++++++
 drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c          |  23 ++-
 4 files changed, 162 insertions(+), 4 deletions(-)
 create mode 100644 arch/arm64/boot/dts/intel/socfpga_agilex5_socdk_tsn_cfg2.dts

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2.43.7