[PATCH net-next 0/4] net: Add Allwinner H616/H618 EMAC1 and AC300 EPHY support

[James Hilliard]

On Tue, Sep 15, 2026 at 10:56 PM Chen-Yu Tsai <wens at kernel.org> wrote:
>
> On Wed, Sep 16, 2026 at 12:41 PM Alastair D'Silva <alastair at d-silva.org> wrote:
> >
> > This series adds support for the secondary Ethernet MAC controller (EMAC1)
> > and the co-packaged AC300 Fast Ethernet Physical Layer (EPHY) found on
> > Allwinner H616 and H618 SoCs.
> >
> > The Allwinner H616/H618 SoCs feature two EMAC instances: EMAC0 (typically
> > used with an external RGMII Gigabit PHY) and EMAC1 (Fast Ethernet,
> > connected internally to the co-packaged AC300 EPHY). EMAC1 uses a
> > dedicated clock control register in the syscon register space, which is
> > accessed via an offset index in the DT syscon property.
> >
> > The AC300 is an integrated 10/100M (100BASE-TX / 10BASE-T) Fast Ethernet
> > PHY communicating over MDIO at address 16 + phy_addr. It requires
> > retrieving factory bandgap calibration data from the SID nvmem controller,
> > managing internal power rails and clocks, and optimizing transceiver signal
> > parameters.
>
> There is already a series from James covering the same thing. Please check
> the mailing list and possibly our wiki (linux-sunxi.org) to avoid duplicate
> work and subjecting the maintainers to the same discussions again.

See:
https://git.kernel.org/netdev/net-next/c/783f6f1fdcd5
https://git.kernel.org/netdev/net-next/c/6cc2fbceb49b
https://lore.kernel.org/all/20260915-submit-h616-emac1-v1-v2-2-322b32e40eb9@gmail.com/

>
>
> ChenYu
>
> > To ensure reliable link establishment and MAC software reset with the
> > internal PHY, dwmac-sun8i is updated to defer MAC software reset until
> > sun8i_dwmac_init() after the internal PHY has powered on and begun
> > clock generation.
> >
> > The series is structured as follows:
> > - Patch 1: DT binding for Allwinner AC300 EPHY.
> > - Patch 2: PHY driver for Allwinner AC300 EPHY.
> > - Patch 3: DT binding update for Allwinner H616 EMAC1 and syscon index.
> > - Patch 4: dwmac-sun8i driver support for H616 EMAC1 clock index and
> >            internal PHY deferred reset.
> >
> > Testing:
> > - Tested on physical Mellow Fly-C5 hardware (Allwinner H618) running
> >   Armbian with sustained 100Mbps full-duplex network traffic (DHCP,
> >   iperf3, NFS rootfs).
> > - Device tree bindings validated with dt_binding_check.
> > - Separate SoC and board DTS additions will be submitted via the
> >   linux-sunxi tree.
> >
> > Alastair D'Silva (4):
> >   dt-bindings: net: phy: Add Allwinner AC300 EPHY binding
> >   net: phy: Add Allwinner AC300 EPHY driver
> >   dt-bindings: net: allwinner,sun8i-a83t-emac: Add Allwinner H616 EMAC1
> >     and syscon index
> >   net: stmmac: dwmac-sun8i: Add Allwinner H616 EMAC clock index and
> >     internal PHY support
> >
> >  .../net/allwinner,sun50i-h618-ac300-ephy.yaml |  79 +++++
> >  .../net/allwinner,sun8i-a83t-emac.yaml        |  14 +-
> >  .../net/ethernet/stmicro/stmmac/dwmac-sun8i.c |  65 +++-
> >  drivers/net/phy/Kconfig                       |   9 +
> >  drivers/net/phy/Makefile                      |   1 +
> >  drivers/net/phy/ac300-phy.c                   | 331 ++++++++++++++++++
> >  6 files changed, 486 insertions(+), 13 deletions(-)
> >  create mode 100644 Documentation/devicetree/bindings/net/allwinner,sun50i-h618-ac300-ephy.yaml
> >  create mode 100644 drivers/net/phy/ac300-phy.c
> >
> > --
> > 2.53.0
> >