netdev - Re: [PATCH net-next v4 1/2] dt-bindings: net: ethernet-phy: Add timing-role role property for ethernet PHYs

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Message-ID: <2e5d5c39-201c-4087-b176-30fa7313a65b@gmail.com>
Date: Tue, 1 Oct 2024 21:29:16 -0700
From: Florian Fainelli <f.fainelli@...il.com>
To: Oleksij Rempel <o.rempel@...gutronix.de>, Andrew Lunn <andrew@...n.ch>,
 Heiner Kallweit <hkallweit1@...il.com>, "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>
Cc: kernel@...gutronix.de, linux-kernel@...r.kernel.org,
 netdev@...r.kernel.org, Russell King <linux@...linux.org.uk>,
 devicetree@...r.kernel.org
Subject: Re: [PATCH net-next v4 1/2] dt-bindings: net: ethernet-phy: Add
 timing-role role property for ethernet PHYs

On 10/1/2024 12:37 AM, Oleksij Rempel wrote:
> This patch introduces a new `timing-role` property in the device tree
> bindings for configuring the master/slave role of PHYs. This is
> essential for scenarios where hardware strap pins are unavailable or
> incorrectly configured.
> 
> The `timing-role` property supports the following values:
> - `force-master`: Forces the PHY to operate as a master (clock source).
> - `force-slave`: Forces the PHY to operate as a slave (clock receiver).
> - `prefer-master`: Prefers the PHY to be master but allows negotiation.
> - `prefer-slave`: Prefers the PHY to be slave but allows negotiation.
> 
> The terms "master" and "slave" are retained in this context to align
> with the IEEE 802.3 standards, where they are used to describe the roles
> of PHY devices in managing clock signals for data transmission. In
> particular, the terms are used in specifications for 1000Base-T and
> MultiGBASE-T PHYs, among others. Although there is an effort to adopt
> more inclusive terminology, replacing these terms could create
> discrepancies between the Linux kernel and the established standards,
> documentation, and existing hardware interfaces.
> 
> Signed-off-by: Oleksij Rempel <o.rempel@...gutronix.de>
> Reviewed-by: Rob Herring (Arm) <robh@...nel.org>

Reviewed-by: Florian Fainelli <florian.fainelli@...adcom.com>
-- 
Florian