linux-kernel - Re: [net-next 2/4] ARM: dts: ast2600-evb: add default RGMII delay

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Message-ID: <5db47dea-7d90-45a1-85a1-1f4f5edd3567@lunn.ch>
Date: Mon, 17 Mar 2025 14:08:41 +0100
From: Andrew Lunn <andrew@...n.ch>
To: Jacky Chou <jacky_chou@...eedtech.com>
Cc: andrew+netdev@...n.ch, davem@...emloft.net, edumazet@...gle.com,
	kuba@...nel.org, pabeni@...hat.com, robh@...nel.org,
	krzk+dt@...nel.org, conor+dt@...nel.org, joel@....id.au,
	andrew@...econstruct.com.au, ratbert@...aday-tech.com,
	netdev@...r.kernel.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-aspeed@...ts.ozlabs.org, BMC-SW@...eedtech.com
Subject: Re: [net-next 2/4] ARM: dts: ast2600-evb: add default RGMII delay

> @@ -147,6 +153,9 @@ &mac2 {
>  	phy-mode = "rgmii";
>  	phy-handle = <&ethphy2>;
>  
> +	tx-internal-delay-ps = <8>;
> +	rx-internal-delay-ps = <4>;
> +

Ideally you want:

	phy-mode = "rgmii-id";
	tx-internal-delay-ps = <0>;
	rx-internal-delay-ps = <0>;

Since 'rgmii-id' correctly describes the hardware.

	Andrew