linux-kernel - Re: [PATCH net-next v2 8/8] dt-bindings: net: sparx5: document RGMII MAC delays

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Message-ID: <29ddbe38-3aac-4518-b9f3-4d228de08360@lunn.ch>
Date: Thu, 14 Nov 2024 21:13:51 +0100
From: Andrew Lunn <andrew@...n.ch>
To: Daniel Machon <daniel.machon@...rochip.com>
Cc: UNGLinuxDriver@...rochip.com, 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>,
	Lars Povlsen <lars.povlsen@...rochip.com>,
	Steen Hegelund <Steen.Hegelund@...rochip.com>,
	Horatiu Vultur <horatiu.vultur@...rochip.com>,
	Russell King <linux@...linux.org.uk>, jacob.e.keller@...el.com,
	robh@...nel.org, krzk+dt@...nel.org, conor+dt@...nel.org,
	devicetree@...r.kernel.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH net-next v2 8/8] dt-bindings: net: sparx5: document RGMII
 MAC delays

On Wed, Nov 13, 2024 at 10:11:16PM +0100, Daniel Machon wrote:
> The lan969x switch device supports two RGMII port interfaces that can be
> configured for MAC level rx and tx delays.
> 
> Document two new properties {rx,tx}-internal-delay-ps. Make them
> required properties, if the phy-mode is one of: rgmii, rgmii_id,
> rgmii-rxid or rgmii-txid. Also specify accepted values.

This is unusual if you look at other uses of {rt}x-internal-delay-ps.
It is generally an optional parameter, and states it defaults to 0 if
missing, and is ignored by the driver if phy-mode is not an rgmii
variant.

	Andrew