linux-kernel - Re: [PATCH v2] net: phy: add driver for Motorcomm yt8511 phy

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Message-ID: <YJsl7rLVI6ShqZvI@lunn.ch>
Date:   Wed, 12 May 2021 02:48:46 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Peter Geis <pgwipeout@...il.com>
Cc:     Heiner Kallweit <hkallweit1@...il.com>,
        Russell King <linux@...linux.org.uk>,
        "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org, linux-rockchip@...ts.infradead.org
Subject: Re: [PATCH v2] net: phy: add driver for Motorcomm yt8511 phy

On Tue, May 11, 2021 at 06:59:13PM -0400, Peter Geis wrote:
> Add a driver for the Motorcomm yt8511 phy that will be used in the
> production Pine64 rk3566-quartz64 development board.
> It supports gigabit transfer speeds, rgmii, and 125mhz clk output.

Hi Peter

Please can you add minimal RGMII delay support. Trying to add it later
generally end up in backwards compatibility problems.

Do you know which one of the four RGMII modes your setup needs? Is the
PHY adding the Rx and Tx delays? So "rgmii-id"?

       Andrew