netdev - Re: [PATCH v3 net-next] net: phy: Add Edge-rate driver for Microsemi PHYs.

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Message-ID: <20160927142659.GC10776@microsemi.com>
Date:   Tue, 27 Sep 2016 16:26:59 +0200
From:   "Allan W. Nielsen" <allan.nielsen@...rosemi.com>
To:     Andrew Lunn <andrew@...n.ch>
CC:     <netdev@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <f.fainelli@...il.com>,
        Raju Lakkaraju <Raju.Lakkaraju@...rosemi.com>
Subject: Re: [PATCH v3 net-next] net: phy: Add Edge-rate driver for Microsemi
 PHYs.

Hi Andrew,

> > +Optional properties:
> > +- vsc8531,edge-rate  : Edge rate sets the drive strength of the MAC
> > +                       interface output signals.  Changing the drive
> > +                       strength will affect the edge rate of the output
> > +                       signal.
> 
> Are we specifying a rate or a strength? It is called edge-rate, so it
> expect it to be a rate, mV/pS or something similar.
I do not know - sorry.

If it is a hard requirement to document these settings using physical units then
we need to requist some help from the HW team.

I will forward this to the HW team - but it will properly take a few days to get
a decent answer.

Best regards
Allan W. Nielsen