linux-kernel - Re: [PATCH v2 2/2] ARM: sun8i: bananapi-m3: Enable dwmac-sun8i

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Date:   Fri, 10 Nov 2017 11:48:11 +0800
From:   Chen-Yu Tsai <wens@...e.org>
To:     Corentin Labbe <clabbe.montjoie@...il.com>
Cc:     Russell King <linux@...linux.org.uk>,
        Mark Rutland <mark.rutland@....com>,
        Maxime Ripard <maxime.ripard@...e-electrons.com>,
        Rob Herring <robh+dt@...nel.org>, Chen-Yu Tsai <wens@...e.org>,
        devicetree <devicetree@...r.kernel.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        linux-sunxi <linux-sunxi@...glegroups.com>
Subject: Re: [PATCH v2 2/2] ARM: sun8i: bananapi-m3: Enable dwmac-sun8i

On Thu, Nov 9, 2017 at 4:29 PM, Corentin Labbe
<clabbe.montjoie@...il.com> wrote:
> The dwmac-sun8i hardware is present on the bananapi m3
> It uses an external PHY rtl8211e via RGMII.
>
> This patch create the needed emac and phy nodes.
>
> Signed-off-by: Corentin Labbe <clabbe.montjoie@...il.com>
> ---
>  arch/arm/boot/dts/sun8i-a83t-bananapi-m3.dts | 18 ++++++++++++++++++
>  1 file changed, 18 insertions(+)
>
> diff --git a/arch/arm/boot/dts/sun8i-a83t-bananapi-m3.dts b/arch/arm/boot/dts/sun8i-a83t-bananapi-m3.dts
> index c606af3dbfed..45bdd5c17829 100644
> --- a/arch/arm/boot/dts/sun8i-a83t-bananapi-m3.dts
> +++ b/arch/arm/boot/dts/sun8i-a83t-bananapi-m3.dts
> @@ -52,6 +52,7 @@
>         compatible = "sinovoip,bpi-m3", "allwinner,sun8i-a83t";
>
>         aliases {
> +               ethernet0 = &emac;
>                 serial0 = &uart0;
>         };
>
> @@ -88,6 +89,23 @@
>         /* TODO GL830 USB-to-SATA bridge downstream w/ GPIO power controls */
>  };
>
> +&emac {
> +       pinctrl-names = "default";
> +       pinctrl-0 = <&emac_rgmii_pins>;
> +       phy-handle = <&ext_rgmii_phy>;
> +       phy-mode = "rgmii";

Schematics say PHY is power by DC1SW from the PMIC.
Not sure why you don't need that. Have you tested your patch?

See https://github.com/wens/linux/commit/c2a12e2470b6d7988a3af043e0f030d8206ad68a

ChenYu

> +       allwinner,rx-delay-ps = <700>;
> +       allwinner,tx-delay-ps = <700>;
> +
> +       status = "okay";
> +};
> +
> +&mdio {
> +       ext_rgmii_phy: ethernet-phy@1 {
> +               reg = <1>;
> +       };
> +};
> +
>  &mmc0 {
>         pinctrl-names = "default";
>         pinctrl-0 = <&mmc0_pins>;
> --
> 2.13.6
>