From mboxrd@z Thu Jan  1 00:00:00 1970
From: Mason <slash.tmp@free.fr>
Subject: Re: Ethernet not working on a different SoC with same eth HW
Date: Fri, 4 Nov 2016 15:13:45 +0100
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Cc: netdev <netdev@vger.kernel.org>,
        Florian Fainelli <f.fainelli@gmail.com>,
        Timur Tabi <timur@codeaurora.org>,
        Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>,
        Zefir Kurtisi <zefir.kurtisi@neratec.com>,
        Martin Blumenstingl <martin.blumenstingl@gmail.com>,
        Uwe Kleine-Konig <u.kleine-koenig@pengutronix.de>,
        Daniel Mack <zonque@gmail.com>,
        Sebastian Frias <sf84@laposte.net>
To: Mans Rullgard <mans@mansr.com>, Andrew Lunn <andrew@lunn.ch>
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On 04/11/2016 15:04, Måns Rullgård wrote:

> Andrew Lunn <andrew@lunn.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.

Isn't there a one-to-one correspondence between MAC and PHY?

Can a MAC be connected to multiple PHYs?
Can a PHY be connected to multiple MACs?

If it is a one-to-one correspondence, then whether the
property is specified in the MAC or PHY node is just a
matter of presentation, IMHO.

Regards.