netdev - Re: [PATCH] net: phy: micrel: Add KSZ8041FTL fiber mode support

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Message-ID: <20160714151506.GI6667@lunn.ch>
Date:	Thu, 14 Jul 2016 17:15:06 +0200
From:	Andrew Lunn <andrew@...n.ch>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	Philipp Zabel <p.zabel@...gutronix.de>, netdev@...r.kernel.org,
	Rob Herring <robh+dt@...nel.org>,
	Mark Rutland <mark.rutland@....com>,
	Florian Fainelli <f.fainelli@...il.com>,
	devicetree@...r.kernel.org,
	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>,
	Geert Uytterhoeven <geert@...ux-m68k.org>
Subject: Re: [PATCH] net: phy: micrel: Add KSZ8041FTL fiber mode support

On Thu, Jul 14, 2016 at 04:33:26PM +0200, Arnd Bergmann wrote:
> On Thursday, July 14, 2016 4:29:43 PM CEST Philipp Zabel wrote:
> > +
> > + - micrel,fiber-mode: If present the PHY is configured to operate in fiber mode
> > +
> > +       Some PHYs, such as the KSZ8041FTL variant, support fiber mode, enabled
> > +       by the FXEN boot strapping pin. It can't be determined from the PHY
> > +       registers whether the PHY is in fiber mode, so this boolean device tree
> > +       property can be used to describe it.
> > +
> > +       In fiber mode, auto-negotiation is disabled and the PHY can only work in
> > +       100base-fx (full and half duplex) modes.
> > 
> 
> Could the generic "phy-mode" property used for this, to avoid the need for
> definingn a custom property?

Hi Arnd

phy-mode is about the link between the MAC and the PHY. This property
is about the link between the PHY and its peer PHY.

   Andrew