linux-kernel - Re: [PATCH 4/5] arm: dts: imx287: Provide description for MTIP L2 switch

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Message-ID: <20250325171634.1c982583@wsk>
Date: Tue, 25 Mar 2025 17:16:34 +0100
From: Lukasz Majewski <lukma@...x.de>
To: Andrew Lunn <andrew@...n.ch>
Cc: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
 Conor Dooley <conor+dt@...nel.org>, Shawn Guo <shawnguo@...nel.org>, Sascha
 Hauer <s.hauer@...gutronix.de>, Paolo Abeni <pabeni@...hat.com>, Jakub
 Kicinski <kuba@...nel.org>, Eric Dumazet <edumazet@...gle.com>,
 davem@...emloft.net, Andrew Lunn <andrew+netdev@...n.ch>, Pengutronix
 Kernel Team <kernel@...gutronix.de>, Fabio Estevam <festevam@...il.com>,
 devicetree@...r.kernel.org, imx@...ts.linux.dev,
 linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, Richard
 Cochran <richardcochran@...il.com>, netdev@...r.kernel.org, Maxime
 Chevallier <maxime.chevallier@...tlin.com>
Subject: Re: [PATCH 4/5] arm: dts: imx287: Provide description for MTIP L2
 switch

Hi Andrew,

> On Tue, Mar 25, 2025 at 12:57:35PM +0100, Lukasz Majewski wrote:
> > This description is similar to one supprted with the cpsw_new.c
> > driver.
> > 
> > It has separated ports and PHYs (connected to mdio bus).
> > 
> > Signed-off-by: Lukasz Majewski <lukma@...x.de>
> > ---
> >  arch/arm/boot/dts/nxp/mxs/imx28-xea.dts | 56
> > +++++++++++++++++++++++++ 1 file changed, 56 insertions(+)
> > 
> > diff --git a/arch/arm/boot/dts/nxp/mxs/imx28-xea.dts
> > b/arch/arm/boot/dts/nxp/mxs/imx28-xea.dts index
> > 6c5e6856648a..e645b086574d 100644 ---
> > a/arch/arm/boot/dts/nxp/mxs/imx28-xea.dts +++
> > b/arch/arm/boot/dts/nxp/mxs/imx28-xea.dts @@ -5,6 +5,7 @@
> >   */
> >  
> >  /dts-v1/;
> > +#include<dt-bindings/interrupt-controller/irq.h>
> >  #include "imx28-lwe.dtsi"
> >  
> >  / {
> > @@ -18,6 +19,61 @@ &can0 {
> >  	status = "okay";
> >  };
> >  
> > +&eth_switch {
> > +	compatible = "fsl,imx287-mtip-switch";  
> 
> The switch is part of the SoC. So i would expect the compatible to be
> in the .dtsi file for the SoC.

Ok.

I'm also wondering if I shall use "fsl," or "nxp," prefix. The former
one is the same as in fec_main.c, but as I do add new driver, the
prefix could be updated.

> 
> > +	pinctrl-names = "default";
> > +	pinctrl-0 = <&mac0_pins_a>, <&mac1_pins_a>;
> > +	phy-supply = <&reg_fec_3v3>;
> > +	phy-reset-duration = <25>;
> > +	phy-reset-post-delay = <10>;
> > +	interrupts = <100>, <101>, <102>;
> > +	clocks = <&clks 57>, <&clks 57>, <&clks 64>, <&clks 35>;
> > +	clock-names = "ipg", "ahb", "enet_out", "ptp";  
> 
> Which of these properties are SoC properties? I _guess_ interrupts,
> clocks and clock-names. So they should be in the SoC .dtsi file. You
> should only add board properties here.

Ok. I will add them.

> 
>        Andrew

Best regards,

Lukasz Majewski

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