linux-kernel - Re: [PATCH v6 06/11] ARM: dts: sunxi: h3/h5: represent the mdio switch used by sun8i-h3-emac

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Message-ID: <20170927134709.GA14370@Red>
Date:   Wed, 27 Sep 2017 15:47:09 +0200
From:   Corentin Labbe <clabbe.montjoie@...il.com>
To:     Maxime Ripard <maxime.ripard@...e-electrons.com>
Cc:     robh+dt@...nel.org, mark.rutland@....com, wens@...e.org,
        linux@...linux.org.uk, catalin.marinas@....com,
        will.deacon@....com, peppe.cavallaro@...com,
        alexandre.torgue@...com, andrew@...n.ch, f.fainelli@...il.com,
        frowand.list@...il.com, netdev@...r.kernel.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-sunxi@...glegroups.com
Subject: Re: [PATCH v6 06/11] ARM: dts: sunxi: h3/h5: represent the mdio
 switch used by sun8i-h3-emac

On Wed, Sep 27, 2017 at 12:16:22PM +0200, Maxime Ripard wrote:
> On Wed, Sep 27, 2017 at 07:34:09AM +0000, Corentin Labbe wrote:
> > Since dwmac-sun8i could use either an integrated PHY or an external PHY
> > (which could be at same MDIO address), we need to represent this selection
> > by a MDIO switch.
> > 
> > Signed-off-by: Corentin Labbe <clabbe.montjoie@...il.com>
> > ---
> >  arch/arm/boot/dts/sunxi-h3-h5.dtsi | 31 +++++++++++++++++++++++++------
> >  1 file changed, 25 insertions(+), 6 deletions(-)
> > 
> > diff --git a/arch/arm/boot/dts/sunxi-h3-h5.dtsi b/arch/arm/boot/dts/sunxi-h3-h5.dtsi
> > index 3b7d953429a6..a8e9b8f378ba 100644
> > --- a/arch/arm/boot/dts/sunxi-h3-h5.dtsi
> > +++ b/arch/arm/boot/dts/sunxi-h3-h5.dtsi
> > @@ -422,14 +422,33 @@
> >  			#size-cells = <0>;
> >  			status = "disabled";
> >  
> > -			mdio: mdio {
> > +			mdio0: mdio {
> >  				#address-cells = <1>;
> >  				#size-cells = <0>;
> > -				int_mii_phy: ethernet-phy@1 {
> > -					compatible = "ethernet-phy-ieee802.3-c22";
> > -					reg = <1>;
> > -					clocks = <&ccu CLK_BUS_EPHY>;
> > -					resets = <&ccu RST_BUS_EPHY>;
> > +				compatible = "snps,dwmac-mdio";
> > +
> > +				mdio-mux {
> > +					compatible = "mdio-mux";
> > +					#address-cells = <1>;
> > +					#size-cells = <0>;
> 
> Newline
> 
> > +					/* Only one MDIO is usable at the time */
> > +					internal_mdio: mdio@1 {
> > +						reg = <1>;
> > +						#address-cells = <1>;
> > +						#size-cells = <0>;
> 
> Newline
> 
> > +						int_mii_phy: ethernet-phy@1 {
> > +							compatible = "ethernet-phy-ieee802.3-c22";
> > +							reg = <1>;
> > +							clocks = <&ccu CLK_BUS_EPHY>;
> > +							resets = <&ccu RST_BUS_EPHY>;
> > +							phy-is-integrated;
> > +						};
> > +					};
> 
> Newline
> 
> > +					mdio: mdio@2 {
> 
> This is quite confusing. Why not call the label external_mdio?
> 

I will do it. (at origin I was not changing it for limiting changes on board with external PHY, but now all DT are reverted, it will be easy)

Regards