linux-kernel - Re: [PATCH 2/3] riscv: dts: sophgo: Add mdio multiplexer device for cv18xx

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Message-ID: <bww3dwd37ujcnztbzw7o7r2qajwcvn54kcd6pcd42y4axfp2d4@zx5jrtcmkh4k>
Date: Wed, 16 Jul 2025 06:06:40 +0800
From: Inochi Amaoto <inochiama@...il.com>
To: Rob Herring <robh@...nel.org>, Inochi Amaoto <inochiama@...il.com>
Cc: Krzysztof Kozlowski <krzk+dt@...nel.org>, 
	Conor Dooley <conor+dt@...nel.org>, Paul Walmsley <paul.walmsley@...ive.com>, 
	Palmer Dabbelt <palmer@...belt.com>, Albert Ou <aou@...s.berkeley.edu>, 
	Alexandre Ghiti <alex@...ti.fr>, Chen Wang <unicorn_wang@...look.com>, 
	Richard Cochran <richardcochran@...il.com>, Alexander Sverdlin <alexander.sverdlin@...il.com>, 
	Yixun Lan <dlan@...too.org>, Ze Huang <huangze@...t.edu.cn>, 
	Thomas Bonnefille <thomas.bonnefille@...tlin.com>, devicetree@...r.kernel.org, linux-riscv@...ts.infradead.org, 
	sophgo@...ts.linux.dev, linux-kernel@...r.kernel.org, netdev@...r.kernel.org, 
	Longbin Li <looong.bin@...il.com>
Subject: Re: [PATCH 2/3] riscv: dts: sophgo: Add mdio multiplexer device for
 cv18xx

On Tue, Jul 15, 2025 at 12:43:35PM -0500, Rob Herring wrote:
> On Wed, Jul 2, 2025 at 9:16 PM Inochi Amaoto <inochiama@...il.com> wrote:
> >
> > Add DT device node of mdio multiplexer device for cv18xx SoC.
> 
> This adds a dtbs_check warning:
> 
> mdio@...9800 (mdio-mux-mmioreg): mdio@80:reg:0:0: 128 is greater than
> the maximum of 31
> 
> >
> > Signed-off-by: Inochi Amaoto <inochiama@...il.com>
> > ---
> >  arch/riscv/boot/dts/sophgo/cv180x.dtsi | 29 ++++++++++++++++++++++++++
> >  1 file changed, 29 insertions(+)
> >
> > diff --git a/arch/riscv/boot/dts/sophgo/cv180x.dtsi b/arch/riscv/boot/dts/sophgo/cv180x.dtsi
> > index 7eecc67f896e..3a82cc40ea1a 100644
> > --- a/arch/riscv/boot/dts/sophgo/cv180x.dtsi
> > +++ b/arch/riscv/boot/dts/sophgo/cv180x.dtsi
> > @@ -31,6 +31,33 @@ rst: reset-controller@...3000 {
> >                         #reset-cells = <1>;
> >                 };
> >
> > +               mdio: mdio@...9800 {
> 
> The nodename is wrong here because this is not an MDIO bus. It is a
> mux. So "mdio-mux@..." for the node name.
> 

Thanks, I will send a fix for this.

Regards,
Inochi