From: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>

Hi All,

This series adds support for the Ethernet MAC (GMAC) IP present on
the Renesas RZ/T2H and RZ/N2H SoCs.

While these SoCs use the same Synopsys DesignWare MAC IP (version 5.20) as
the existing RZ/V2H(P), the hardware is synthesized with different options
that require driver and binding updates:
- 8 RX/TX queue pairs instead of 4 (requiring 19 interrupts vs 11)
- Different clock requirements (3 clocks vs 7)
- Different reset handling (2 named resets vs 1 unnamed)
- Split header feature enabled
- GMAC connected through a MIIC PCS on RZ/T2H

The series first updates the generic dwmac binding to accommodate the
higher interrupt count, then extends the Renesas-specific binding with
a to document both SoCs.

The driver changes prepare for multi-SoC support by introducing OF match
data for per-SoC configuration, then add RZ/T2H support including PCS
integration through the existing RZN1 MIIC driver.

Note this patch series is dependent on the PCS driver [0]
(not a build dependency).
[0] https://lore.kernel.org/all/20250904114204.4148520-1-prabhakar.mahadev-lad.rj@bp.renesas.com/

v2->v3:
- Rebased on top next-20250908.
- Made sure STMMAC_FLAG_EN_TX_LPI_CLK_PHY_CAP flag is
  always set for all the SoCs.
- Updated Kconfig to include RZ/T2H and RZ/N2H.

- Fixed commit message typos.
v1->v2:
- Squshed incerasing interrupt count changes to snps,dwmac.yaml into this patch.
- Dropped un-necessary blank lines.
- Switched using "renesas,r9a09g077-gbeth" compatible string for RZ/T2H
  instead of "renesas,rzt2h-gbeth" and used it as a fallback for RZ/N2H.
- Updated description for reset property.
- Added pcs-handle property required for RZ/T2H.
- Updated commit message to reflect changes for patch 1/3.

Cheers,
Prabhakar

Lad Prabhakar (3):
  dt-bindings: net: renesas,rzv2h-gbeth: Document Renesas RZ/T2H and
    RZ/N2H SoCs
  net: stmmac: dwmac-renesas-gbeth: Use OF data for configuration
  net: stmmac: dwmac-renesas-gbeth: Add support for RZ/T2H SoC

 .../bindings/net/renesas,rzv2h-gbeth.yaml     | 178 ++++++++++++++----
 .../devicetree/bindings/net/snps,dwmac.yaml   |   9 +-
 drivers/net/ethernet/stmicro/stmmac/Kconfig   |  12 +-
 .../stmicro/stmmac/dwmac-renesas-gbeth.c      | 108 ++++++++++-
 4 files changed, 248 insertions(+), 59 deletions(-)

-- 
2.51.0