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

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Date:   Wed, 27 Sep 2017 12:16:22 +0200
From:   Maxime Ripard <maxime.ripard@...e-electrons.com>
To:     Corentin Labbe <clabbe.montjoie@...il.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 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?

Thanks

-- 
Maxime Ripard, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com

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