linux-kernel - [PATCH net-next v2 00/10] net: stmmac: Add support for Allwinner A523 GMAC200

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Message-Id: <20250813145540.2577789-1-wens@kernel.org>
Date: Wed, 13 Aug 2025 22:55:30 +0800
From: Chen-Yu Tsai <wens@...nel.org>
To: Andrew Lunn <andrew+netdev@...n.ch>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Chen-Yu Tsai <wens@...e.org>,
	Jernej Skrabec <jernej@...nel.org>,
	Samuel Holland <samuel@...lland.org>
Cc: netdev@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-sunxi@...ts.linux.dev,
	linux-kernel@...r.kernel.org,
	Andre Przywara <andre.przywara@....com>
Subject: [PATCH net-next v2 00/10] net: stmmac: Add support for Allwinner A523 GMAC200

From: Chen-Yu Tsai <wens@...e.org>

Hi everyone,

This is v2 of my Allwinner A523 GMAC200 support series.

Changes since v1:
- Dropped RFT tag
- Switched to generic (tx|rx)-internal-delay-ps 
- dwmac-sun55i driver bits
  - Changed dev_err() + return to dev_err_probe()
  - Added check of return value from syscon regmap write
  - Changed driver name to match file name
- sram driver bits
  - Fixed check on return value
  - Expanded commit message
- dtsi
  - Fixed typo in tx-queues-config
- cubie a5e
  - Add PHY regulator delay
- Link to v1:
https://lore.kernel.org/all/20250701165756.258356-1-wens@kernel.org/

This series adds support for the second Ethernet controller found on the
Allwinner A523 SoC family. This controller, dubbed GMAC200, is a DWMAC4
core with an integration layer around it. The integration layer is
similar to older Allwinner generations, but with an extra memory bus
gate and separate power domain.

Patch 1 adds a new compatible string combo to the existing Allwinner
EMAC binding.

Patch 2 adds a new driver for this core and integration combo.

Patch 3 extends the sunxi SRAM driver to allow access to the clock delay
controls for the second Ethernet controller.

Patch 4 registers the special regmap for the clock delay controls as a
syscon. This allows the new network driver to use the syscon interface,
instead of the following dance which the existing dwmac-sun8i driver
does:

    of_parse_phandle();
    of_find_device_by_node();
    dev_get_regmap();

With this change in place we can also drop the above from the
dwmac-sun8i driver.

Patch 5 adds a device node and pinmux settings for the GMAC200.

Patches 6 and 8 add missing Ethernet PHY reset settings for the
already enabled controller.

Patches 7, 9, and 10 enable the GMAC200 on three boards. I only
have the Orangepi 4A, so I am asking for people to help test the
two other boards. The RX/TX clock delay settings were taken from
their respective BSPs, though those numbers don't always work, as
is was the case for the Orangepi 4A.

Please have a look and help test on the Avaota A1. I don't expect
any issues there though, since the PHY is always on, unlike on the
Cubie A5E.

Patches 1 and 2 should go through net-next, and I will take all the
other patches through the sunxi tree.

Thanks
ChenYu

Chen-Yu Tsai (10):
  dt-bindings: net: sun8i-emac: Add A523 GMAC200 compatible
  net: stmmac: Add support for Allwinner A523 GMAC200
  soc: sunxi: sram: add entry for a523
  soc: sunxi: sram: register regmap as syscon
  arm64: dts: allwinner: a523: Add GMAC200 ethernet controller
  arm64: dts: allwinner: a527: cubie-a5e: Add ethernet PHY reset setting
  arm64: dts: allwinner: a527: cubie-a5e: Enable second Ethernet port
  arm64: dts: allwinner: t527: avaota-a1: Add ethernet PHY reset setting
  arm64: dts: allwinner: t527: avaota-a1: enable second Ethernet port
  arm64: dts: allwinner: t527: orangepi-4a: Enable Ethernet port

 .../net/allwinner,sun8i-a83t-emac.yaml        |  81 ++++++++-
 .../arm64/boot/dts/allwinner/sun55i-a523.dtsi |  55 ++++++
 .../dts/allwinner/sun55i-a527-cubie-a5e.dts   |  31 +++-
 .../dts/allwinner/sun55i-t527-avaota-a1.dts   |  29 +++-
 .../dts/allwinner/sun55i-t527-orangepi-4a.dts |  23 +++
 drivers/net/ethernet/stmicro/stmmac/Kconfig   |  12 ++
 drivers/net/ethernet/stmicro/stmmac/Makefile  |   1 +
 .../ethernet/stmicro/stmmac/dwmac-sun55i.c    | 161 ++++++++++++++++++
 drivers/soc/sunxi/sunxi_sram.c                |  14 ++
 9 files changed, 401 insertions(+), 6 deletions(-)
 create mode 100644 drivers/net/ethernet/stmicro/stmmac/dwmac-sun55i.c

-- 
2.39.5