netdev - Re: [PATCH] mvneta: add FIXED

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Message-ID: <20151109173130.GF8644@n2100.arm.linux.org.uk>
Date:	Mon, 9 Nov 2015 17:31:30 +0000
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	linux-arm-kernel@...ts.infradead.org,
	Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
	Andrew Lunn <andrew@...n.ch>,
	Florian Fainelli <f.fainelli@...il.com>,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	Stas Sergeev <stsp@...rs.sourceforge.net>,
	"David S. Miller" <davem@...emloft.net>
Subject: Re: [PATCH] mvneta: add FIXED_PHY dependency

On Mon, Nov 09, 2015 at 06:12:02PM +0100, Arnd Bergmann wrote:
> On Monday 09 November 2015 17:08:34 Russell King - ARM Linux wrote:
> > They are "optional" because when you're using a DSA switch, you don't
> > specify a PHY (because, there isn't one).  For example, this is what
> > I'm using with an Armada 388 board with a Marvell DSA switch.  The
> > DSA does not appear as a PHY, and no node in the DSA stanza can be
> > referenced for a phy entry in the ethernet device's stanza.
> > 
> >                         eth1: ethernet@...00 {
> >                                 compatible = "marvell,armada-370-neta";
> >                                 reg = <0x30000 0x4000>;
> >                                 interrupts-extended = <&mpic 10>;
> >                                 clocks = <&gateclk 3>;
> >                                 managed = "in-band-status";
> >                                 phy-mode = "sgmii";
> >                                 status = "okay";
> >                         };
> > 
> > 
> 
> Ok, then it would be nice to change the binding to reflect that,
> and also document the "managed" property there.

"managed" is already documented.  See
Documentation/devicetree/bindings/net/ethernet.txt:

- managed: string, specifies the PHY management type. Supported values are:
  "auto", "in-band-status". "auto" is the default, it usess MDIO for
  management if fixed-link is not specified.

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