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

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Date:   Fri, 04 Nov 2016 14:04:39 +0000
From:   Måns Rullgård <mans@...sr.com>
To:     Andrew Lunn <andrew@...n.ch>
Cc:     Mason <slash.tmp@...e.fr>, 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

Andrew Lunn <andrew@...n.ch> writes:

>> 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.

Does the internal delay here refer to the PHY or the MAC?  It's a
property of the MAC node after all.

-- 
Måns Rullgård