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

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Message-ID: <d3b20a9ce58fa296034fe3aa8b60ecde4c4192f4.camel@gmail.com>
Date: Sat, 14 Jun 2025 23:19:34 +0200
From: Alexander Sverdlin <alexander.sverdlin@...il.com>
To: Inochi Amaoto <inochiama@...il.com>, 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
 Wang	 <unicorn_wang@...look.com>, Paul Walmsley <paul.walmsley@...ive.com>,
 Palmer Dabbelt <palmer@...belt.com>, Albert Ou <aou@...s.berkeley.edu>,
 Alexandre Ghiti <alex@...ti.fr>,  Richard Cochran
 <richardcochran@...il.com>, Yixun Lan <dlan@...too.org>, Thomas Bonnefille	
 <thomas.bonnefille@...tlin.com>, Ze Huang <huangze@...t.edu.cn>
Cc: netdev@...r.kernel.org, devicetree@...r.kernel.org,
 sophgo@...ts.linux.dev, 	linux-kernel@...r.kernel.org,
 linux-riscv@...ts.infradead.org, Longbin Li	 <looong.bin@...il.com>
Subject: Re: [PATCH net-next RFC 0/3] riscv: dts: sophgo: Add ethernet
 support for cv18xx

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.

I could look into it, if Sophgo has documented the internal PHY, just wanted to
sync with you for the case you've seen this already...

> 
>  .../bindings/net/sophgo,cv1800b-dwmac.yaml    | 113 ++++++++++++++++++
>  arch/riscv/boot/dts/sophgo/cv180x.dtsi        |  70 +++++++++++
>  2 files changed, 183 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/net/sophgo,cv1800b-dwmac.yaml

-- 
Alexander Sverdlin.