[PATCH net-next 0/2] net: stmmac: dwmac-socfpga: Add Agilex5 TSN GMAC support

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

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

This series adds support for the gmac1 TSN port on the Intel SoCFPGA
Agilex5 SoCDK TSN Config2 board.

The TSN port (gmac1) connects to its PHY through a GMII-to-RGMII converter
implemented as FPGA soft IP. This converter provides the RGMII TX/RX clock
delays, requiring the MAC interface selector to be configured for GMII while
the PHY-facing interface is configured as RGMII without delay duplication.

Patch 1 documents the altr,socfpga-stmmac-agilex5-tsn compatible. Patch 2
adds dedicated match .data ops for the required interface setup.

These two patches were previously posted as patches 3 and 4 of the
"Add Agilex5 SoCDK TSN Config2 board support" series (up to v6). Per
Jakub Kicinski's request, they are reposted here as a separate series
for net-next. The board-level binding and DTS patches will be sent
separately to the SoCFPGA tree.

Changes since the v6 board series:
  - Split out the networking patches, rebased onto latest net-next.
  - Add Reviewed-by from Maxime Chevallier on patch 2.

History from the board series:

v6:
  - Put altr,socfpga-stmmac-agilex5-tsn in the same compatible enum as
    altr,socfpga-stmmac-agilex5 in the net binding, per Krzysztof Kozlowski.

v5:
  - Replace of_device_is_compatible() probe check with dedicated
    socfpga_agilex5_tsn_gmac_ops via match .data, per Krzysztof Kozlowski
    and Dinh Nguyen.
  - Drop altr,socfpga-stmmac-agilex5 fallback from the TSN compatible list
    and rewrite the net binding commit message to explain the hardware
    difference, per Krzysztof Kozlowski.

v4:
  - Add Reviewed-by from Andrew Lunn on the driver patch.

v2:
  - Replace mac-mode DT property with compatible string-based detection per
    Andrew Lunn's feedback.
  - Use phy-mode = "rgmii-id" to correctly reflect MAC-side delay handling.
  - Rename compatible string to altr,socfpga-stmmac-agilex5-tsn for
    consistency with existing altr,socfpga-stmmac-* compatibles.
  - Add DT binding documentation for new net compatible string (new patch).

Nazim Amirul (2):
  dt-bindings: net: altr,socfpga-stmmac: Add
    altr,socfpga-stmmac-agilex5-tsn compatible
  net: stmmac: dwmac-socfpga: Add support for Agilex5 TSN GMAC with FPGA
    converter

 .../bindings/net/altr,socfpga-stmmac.yaml     |  5 +++-
 .../ethernet/stmicro/stmmac/dwmac-socfpga.c   | 23 ++++++++++++++++++-
 2 files changed, 26 insertions(+), 2 deletions(-)

-- 
2.43.7