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Message-ID: <20160603004632.GB12165@lunn.ch>
Date:	Fri, 3 Jun 2016 02:46:32 +0200
From:	Andrew Lunn <andrew@...n.ch>
To:	Rob Herring <robh@...nel.org>
Cc:	Pramod Kumar <pramod.kumar@...adcom.com>,
	Mark Rutland <mark.rutland@....com>,
	devicetree@...r.kernel.org, Pawel Moll <pawel.moll@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will.deacon@....com>,
	linux-kernel@...r.kernel.org,
	Kishon Vijay Abraham I <kishon@...com>,
	netdev@...r.kernel.org, bcm-kernel-feedback-list@...adcom.com,
	Kumar Gala <galak@...eaurora.org>,
	"David S. Miller" <davem@...emloft.net>,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v2 2/7] DT: phy.txt: Add mdio-integrated-mux property

On Thu, Jun 02, 2016 at 06:27:03PM -0500, Rob Herring wrote:
> On Tue, May 31, 2016 at 07:06:36PM +0530, Pramod Kumar wrote:
> > This property is used by integrated MDIO multiplexer
> > which has bus selection and mdio transaction generation logic,
> > integrated inside.
> > 
> > Signed-off-by: Pramod Kumar <pramod.kumar@...adcom.com>
> > ---
> >  Documentation/devicetree/bindings/net/mdio-mux.txt | 9 ++++++++-
> >  1 file changed, 8 insertions(+), 1 deletion(-)
> > 
> > diff --git a/Documentation/devicetree/bindings/net/mdio-mux.txt b/Documentation/devicetree/bindings/net/mdio-mux.txt
> > index 491f5bd..b5ad83e 100644
> > --- a/Documentation/devicetree/bindings/net/mdio-mux.txt
> > +++ b/Documentation/devicetree/bindings/net/mdio-mux.txt
> > @@ -5,13 +5,20 @@ numbered uniquely in a device dependent manner.  The nodes for an MDIO
> >  bus multiplexer/switch will have one child node for each child bus.
> >  
> >  Required properties:
> > -- mdio-parent-bus : phandle to the parent MDIO bus.
> >  - #address-cells = <1>;
> >  - #size-cells = <0>;
> >  
> >  Optional properties:
> > +- mdio-parent-bus : phandle to the parent MDIO bus. Should be used
> > +		if parent mdio bus is not part of multiplexer.
> 
> You don't appear to be using this. When would you?

He is moving it to optional. The mdio-mux-mmio and mdio-mux-gpio do
however use it, which follow this binding.

	Andrew

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