Add ETHSW support for Renesas RZ/T2H and RZ/N2H SoCs [LWN.net]

From:		Prabhakar <prabhakar.csengg-AT-gmail.com>
To:		Clément Léger <clement.leger-AT-bootlin.com>, Andrew Lunn <andrew-AT-lunn.ch>, Vladimir Oltean <olteanv-AT-gmail.com>, "David S. Miller" <davem-AT-davemloft.net>, Eric Dumazet <edumazet-AT-google.com>, Jakub Kicinski <kuba-AT-kernel.org>, Paolo Abeni <pabeni-AT-redhat.com>, Rob Herring <robh-AT-kernel.org>, Krzysztof Kozlowski <krzk+dt-AT-kernel.org>, Conor Dooley <conor+dt-AT-kernel.org>, Simon Horman <horms-AT-kernel.org>, Philipp Zabel <p.zabel-AT-pengutronix.de>, Russell King <linux-AT-armlinux.org.uk>, Geert Uytterhoeven <geert+renesas-AT-glider.be>, Magnus Damm <magnus.damm-AT-gmail.com>
Subject:		[PATCH net-next 00/11] Add ETHSW support for Renesas RZ/T2H and RZ/N2H SoCs
Date:		Fri, 21 Nov 2025 11:35:26 +0000
Message-ID:		<20251121113553.2955854-1-prabhakar.mahadev-lad.rj@bp.renesas.com>
Cc:		linux-renesas-soc-AT-vger.kernel.org, netdev-AT-vger.kernel.org, devicetree-AT-vger.kernel.org, linux-kernel-AT-vger.kernel.org, Prabhakar <prabhakar.csengg-AT-gmail.com>, Biju Das <biju.das.jz-AT-bp.renesas.com>, Fabrizio Castro <fabrizio.castro.jz-AT-renesas.com>, Lad Prabhakar <prabhakar.mahadev-lad.rj-AT-bp.renesas.com>
Archive-link:		Article

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

Hi All,

This series of patches adds support for the Renesas RZ/T2H and RZ/N2H SoCs
which integrate an Ethernet switch IP variant called ETHSW. The ETHSW is
largely compatible with the A5PSW switch found on RZ/N1 SoCs, but has
several key differences in register layout and hardware configuration. The
series includes updates to the DSA driver, device tree bindings, and
Kconfig to enable support for these SoCs.

Cheers,
Prabhakar

Lad Prabhakar (11):
  net: dsa: tag_rzn1_a5psw: Drop redundant ETH_P_DSA_A5PSW definition
  net: dsa: tag_rzn1_a5psw: Add RZ/T2H ETHSW tag protocol and register
    ethsw tag driver
  net: dsa: Kconfig: Expand config description to cover RZ/T2H and
    RZ/N2H ETHSW
  dt-bindings: net: dsa: renesas,rzn1-a5psw: Add RZ/T2H and RZ/N2H ETHSW
    support
  net: dsa: rzn1-a5psw: Add support for optional reset control
  net: dsa: rzn1-a5psw: Add support for optional timestamp clock
  net: dsa: rzn1-a5psw: Make switch topology configurable via OF data
  net: dsa: rzn1-a5psw: Make DSA tag protocol configurable via OF data
  net: dsa: rzn1-a5psw: Add support for management port frame length
    adjustment
  net: dsa: rzn1-a5psw: Add support for RZ/T2H Ethernet switch
  net: dsa: Kconfig: Enable support for RZ/T2H and RZ/N2H SoCs

 .../bindings/net/dsa/renesas,rzn1-a5psw.yaml  | 154 +++++++++++++++---
 drivers/net/dsa/Kconfig                       |   9 +-
 drivers/net/dsa/rzn1_a5psw.c                  |  58 +++++--
 drivers/net/dsa/rzn1_a5psw.h                  |  25 ++-
 include/net/dsa.h                             |   2 +
 include/uapi/linux/if_ether.h                 |   2 +-
 net/dsa/Kconfig                               |   6 +-
 net/dsa/tag_rzn1_a5psw.c                      |  22 ++-
 8 files changed, 230 insertions(+), 48 deletions(-)

-- 
2.52.0