netdev - Re: Ethernet not working on a different SoC with same eth HW

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Message-ID: <20161104135752.GC3600@lunn.ch>
Date:   Fri, 4 Nov 2016 14:57:52 +0100
From:   Andrew Lunn <andrew@...n.ch>
To:     Mason <slash.tmp@...e.fr>
Cc:     Mans Rullgard <mans@...sr.com>, netdev <netdev@...r.kernel.org>,
        Florian Fainelli <f.fainelli@...il.com>,
        Timur Tabi <timur@...eaurora.org>,
        Sergei Shtylyov <sergei.shtylyov@...entembedded.com>,
        Zefir Kurtisi <zefir.kurtisi@...atec.com>,
        Martin Blumenstingl <martin.blumenstingl@...il.com>,
        Uwe Kleine-Konig <u.kleine-koenig@...gutronix.de>,
        Daniel Mack <zonque@...il.com>,
        Sebastian Frias <sf84@...oste.net>
Subject: Re: Ethernet not working on a different SoC with same eth HW

> Considering the ethernet DT bindings:
> 
> https://www.kernel.org/doc/Documentation/devicetree/bindings/net/ethernet.txt
> 
> Specifically, phy-mode values "rgmii", "rgmii-id", "rgmii-rxid", "rgmii-txid".
> 
> Assuming that "rxid" (rx internal delay) and "rx clock delay" are
> in fact the same concept with different names, do you agree that
> it would be unexpected for "rgmii rx clock delay" to be enabled
> when a DTB specifies "rgmii" or "rgmii-txid" ?

I agree with you. But fixing it is likely to break boards which
currently have "rgmii", but actually need the delay in order to work.

	  Andrew