netdev - Re: [PATCH net-next v2 3/4] dt-bindings: net: Add RGMII internal delay for DP83869

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Message-ID: <20200520192719.GK652285@lunn.ch>
Date:   Wed, 20 May 2020 21:27:19 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Dan Murphy <dmurphy@...com>
Cc:     Florian Fainelli <f.fainelli@...il.com>, hkallweit1@...il.com,
        davem@...emloft.net, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH net-next v2 3/4] dt-bindings: net: Add RGMII internal
 delay for DP83869

Hi Dan

> UGH I think I just got volunteered to do make them common.

There is code you can copy from PHY drivers. :-)

What would be kind of nice is if the validate was in the core as
well. Pass a list of possible delays in pS, and it will do a
phydev_err() if what is in DT does not match one of the listed
delays. Take a look around at what current drivers do and see if you
can find a nice abstraction which will work for a few drivers. We
cannot easily convert existing drivers without breaking DT, but a
design which works in theory for what we currently have has a good
chance of working for any new PHY driver.

     Andrew