linux-kernel - Re: [net-next v2 1/4] dt-bindings: net: ftgmac100: Restrict phy-mode and delay properties for AST2600

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Message-ID: <08c46fbc-b65a-4eb4-9cfa-e555cab8398b@lunn.ch>
Date: Fri, 15 Aug 2025 20:12:54 +0200
From: Andrew Lunn <andrew@...n.ch>
To: Jacky Chou <jacky_chou@...eedtech.com>
Cc: 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>, Joel Stanley <joel@....id.au>,
	Andrew Jeffery <andrew@...econstruct.com.au>,
	Simon Horman <horms@...nel.org>,
	Heiner Kallweit <hkallweit1@...il.com>,
	Uwe Kleine-König <u.kleine-koenig@...libre.com>,
	Po-Yu Chuang <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,
	taoren@...a.com, bmc-sw2@...eedtech.com
Subject: Re: [net-next v2 1/4] dt-bindings: net: ftgmac100: Restrict phy-mode
 and delay properties for AST2600

> +allOf:
> +  - $ref: ethernet-controller.yaml#
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            const: aspeed,ast2600-mac01
> +    then:
> +      properties:
> +        phy-mode:
> +          enum: [rgmii-id, rgmii-rxid]

Why not rgmii-txid? Also, why not rgmii?

On the MAC, tx/rx-internal-delay-ps is meant to be used to perform
small fine tuning. There is no reason why you cannot use this with a
PCB which implements a delay.

	Andrew