linux-kernel - Re: [linux-next-v1 1/3] arm64: dts: rockchip: Fix gmac phy mode to rgmii on Rock 3A sbc

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Date:   Fri, 11 Nov 2022 07:56:13 -0500
From:   Peter Geis <pgwipeout@...il.com>
To:     Anand Moon <linux.amoon@...il.com>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Heiko Stuebner <heiko@...ech.de>,
        Chukun Pan <amadeus@....edu.cn>,
        Michael Riesch <michael.riesch@...fvision.net>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [linux-next-v1 1/3] arm64: dts: rockchip: Fix gmac phy mode to
 rgmii on Rock 3A sbc

On Fri, Nov 11, 2022 at 4:43 AM Anand Moon <linux.amoon@...il.com> wrote:
>
> On rk356x ethernet phy support reduced media independent interface (RMII)
> and reduced gigabit media independent interface (RGMII).
> So set the phy mode to rgmii.

The RTL8211 supports rgmii-id just fine, you only need to go to rgmii
on these boards if you need to tune the delays manually.

>
> Signed-off-by: Anand Moon <linux.amoon@...il.com>
> ---
>  arch/arm64/boot/dts/rockchip/rk3568-rock-3a.dts | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/arm64/boot/dts/rockchip/rk3568-rock-3a.dts b/arch/arm64/boot/dts/rockchip/rk3568-rock-3a.dts
> index ea74ba32fbbd..72e410e3aca8 100644
> --- a/arch/arm64/boot/dts/rockchip/rk3568-rock-3a.dts
> +++ b/arch/arm64/boot/dts/rockchip/rk3568-rock-3a.dts
> @@ -253,7 +253,7 @@ &gmac1 {
>         assigned-clock-rates = <0>, <125000000>;
>         clock_in_out = "output";
>         phy-handle = <&rgmii_phy1>;
> -       phy-mode = "rgmii-id";
> +       phy-mode = "rgmii";

You should be setting the delay tuning in this patch as well.

>         pinctrl-names = "default";
>         pinctrl-0 = <&gmac1m1_miim
>                      &gmac1m1_tx_bus2
> --
> 2.38.1
>
>
> _______________________________________________
> Linux-rockchip mailing list
> Linux-rockchip@...ts.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-rockchip

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