linux-kernel - Re: [PATCH net-next v3 1/4] dt-bindings: net: ftgmac100: Add delay properties for AST2600

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Message-ID: <cf5a3144-7b5e-479b-bfd8-3447f5f567ab@lunn.ch>
Date: Tue, 4 Nov 2025 05:07:58 +0100
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>,
	Po-Yu Chuang <ratbert@...aday-tech.com>,
	Joel Stanley <joel@....id.au>,
	Andrew Jeffery <andrew@...econstruct.com.au>,
	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
Subject: Re: [PATCH net-next v3 1/4] dt-bindings: net: ftgmac100: Add delay
 properties for AST2600

On Mon, Nov 03, 2025 at 03:39:16PM +0800, Jacky Chou wrote:
> Create the new compatibles to identify AST2600 MAC0/1 and MAC3/4.
> Add conditional schema constraints for Aspeed AST2600 MAC controllers:
> - For "aspeed,ast2600-mac01", require rx/tx-internal-delay-ps properties
>   with 45ps step.
> - For "aspeed,ast2600-mac23", require rx/tx-internal-delay-ps properties
>   with 250ps step.
> - Both require the "scu" property.
> Other compatible values remain unrestricted.
> 
> Signed-off-by: Jacky Chou <jacky_chou@...eedtech.com>
> ---
>  .../devicetree/bindings/net/faraday,ftgmac100.yaml | 50 ++++++++++++++++++++++
>  1 file changed, 50 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/net/faraday,ftgmac100.yaml b/Documentation/devicetree/bindings/net/faraday,ftgmac100.yaml
> index d14410018bcf..de646e7e3bca 100644
> --- a/Documentation/devicetree/bindings/net/faraday,ftgmac100.yaml
> +++ b/Documentation/devicetree/bindings/net/faraday,ftgmac100.yaml
> @@ -19,6 +19,12 @@ properties:
>                - aspeed,ast2500-mac
>                - aspeed,ast2600-mac

I don't know if it is possible, but it would be good to mark
aspeed,ast2600-mac as deprecated.

I also think some comments would be good, explaining how
aspeed,ast2600-mac01 and aspeed,ast2600-mac23 differ from
aspeed,ast2600-mac, and why you should use them.

	Andrew