linux-kernel - Re: [v1] arm64: dts: freescale: imx93-var-som: update eqos support for MaxLinear PHY

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Message-ID: <CAK+owoihxp-2xAvFfVthvNELshti_3V-pFgD7D7jzd1XqiLgGQ@mail.gmail.com>
Date: Wed, 4 Jun 2025 09:37:39 +0200
From: Stefano Radaelli <stefano.radaelli21@...il.com>
To: Andrew Lunn <andrew@...n.ch>
Cc: devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
	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>, 
	Pengutronix Kernel Team <kernel@...gutronix.de>, Fabio Estevam <festevam@...il.com>, imx@...ts.linux.dev, 
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [v1] arm64: dts: freescale: imx93-var-som: update eqos support
 for MaxLinear PHY

Hi Andrew,

I double-checked with our hardware team, and it turns out that all required
RGMII delays are already handled by the hardware on the SOM (trace
tuning + PHY config).
So "rgmii" is indeed intentional here, no additional software delay needed.
Thanks for pointing it out, it made me double-check, which is always a
good thing.

Best Regards,

Stefano

Il giorno mer 4 giu 2025 alle ore 03:19 Andrew Lunn <andrew@...n.ch> ha scritto:
>
> >  &eqos {
> > @@ -39,6 +26,7 @@ &eqos {
> >       pinctrl-0 = <&pinctrl_eqos>;
> >       phy-mode = "rgmii";
>
> I know this is not in the scope of what you are trying to do, but this
> is probably wrong:
>
> https://elixir.bootlin.com/linux/v6.15/source/Documentation/devicetree/bindings/net/ethernet-controller.yaml#L287
>
>         Andrew