[PATCH net-next RFC 0/3] riscv: dts: sophgo: Add ethernet support for cv18xx

[Inochi Amaoto]

On Sat, Jun 14, 2025 at 11:19:34PM +0200, Alexander Sverdlin wrote:
> Hi Inochi!
> 
> On Wed, 2025-06-11 at 16:07 +0800, Inochi Amaoto wrote:
> > Add device binding and dts for CV18XX series SoC, this dts change series
> > require both the mdio patch [1] and the reset patch [2].
> > 
> > [1] https://lore.kernel.org/all/20250611080228.1166090-1-inochiama@gmail.com
> > [2] https://lore.kernel.org/all/20250611075321.1160973-1-inochiama@gmail.com
> > 
> > Inochi Amaoto (3):
> >   dt-bindings: net: Add support for Sophgo CV1800 dwmac
> >   riscv: dts: sophgo: Add ethernet device for cv18xx
> >   riscv: dts: sophgo: Add mdio multiplexer device for cv18xx
> 
> Have you noticed any problems on the board you are testing on?
> I've added the patchset + pre-requisited + the following into my board DT
> for Milk-V Duo Module 01 EVB:
> 
> &mdio {
>        status = "okay";
> };
> 
> &gmac0 {
>        phy-mode = "internal";
>        phy-handle = <&internal_ephy>;
>        status = "okay";
> };
> 
> And the PHY is being detected and the Ethernet controller is being instantiated,
> but the PHY behaves really strange: LEDs blinking wildly, link status is bogus
> 100FULL UP even without cable insterted and the real traffic starts to travel
> only roughly a minute after the cable has been plugged in.
> 

This is true and may be related to a wrong pinctrl setting or the
phy setting. But I am not sure the right configuration is at now.
IIRC the phy is inited in the uboot and the kernel does not touch
its custom part.

Regards,
Inochi