netdev - Re: [PATCH net-next v2 3/4] Documentation: net: phy: Add blurb about RGMII

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Message-ID: <yw1xzikh3wxl.fsf@unicorn.mansr.com>
Date:   Wed, 30 Nov 2016 13:43:34 +0000
From:   Måns Rullgård <mans@...sr.com>
To:     David Laight <David.Laight@...LAB.COM>
Cc:     'Florian Fainelli' <f.fainelli@...il.com>,
        Timur Tabi <timur@...eaurora.org>,
        "netdev\@vger.kernel.org" <netdev@...r.kernel.org>,
        "davem\@davemloft.net" <davem@...emloft.net>,
        "andrew\@lunn.ch" <andrew@...n.ch>,
        "sf84\@laposte.net" <sf84@...oste.net>,
        "martin.blumenstingl\@googlemail.com" 
        <martin.blumenstingl@...glemail.com>,
        "alexandre.torgue\@st.com" <alexandre.torgue@...com>,
        "peppe.cavallaro\@st.com" <peppe.cavallaro@...com>,
        "jbrunet\@baylibre.com" <jbrunet@...libre.com>
Subject: Re: [PATCH net-next v2 3/4] Documentation: net: phy: Add blurb about RGMII

David Laight <David.Laight@...LAB.COM> writes:

> From: Florian Fainelli
>> Sent: 27 November 2016 23:03
>> Le 27/11/2016  14:24, Timur Tabi a crit :
>> >> + * PHY device drivers in PHYLIB being reusable by nature, being able to
>> >> +   configure correctly a specified delay enables more designs with
>> >> similar delay
>> >> +   requirements to be operate correctly
>> >
>> > Ok, this one I don't know how to fix.  I'm not really sure what you're
>> > trying to say.
>> 
>> What I am trying to say is that once a PHY driver properly configures a
>> delay that you have specified, there is no reason why this is not
>> applicable to other platforms using this same PHY driver.
>
> As has been stated earlier it can depend on the track lengths on the
> board itself.
> (Although 1ns is about 1 foot - so track delays of that length are unlikely.)

There could be a delay element.

-- 
Måns Rullgård