Re: [PATCH 5/5] arm64: dts: allwinner: t527: add EMAC0 to Avaoto-A1 board

Andre Przywara
2025-04-24T01:18:37Z

On Wed, 23 Apr 2025 22:03:26 +0800
Yixun Lan <dlan@gentoo.org> wrote:

Hi,

> On Avaoto A1 board, the EMAC0 connect to an external RTL8211F-CG PHY,

The name would be "Avaota" A1 board.

> which features a 25MHz crystal, and using PH8 pin as PHY reset.
>
> Signed-off-by: Yixun Lan <dlan@gentoo.org>
> ---
> I don't own this board, only compose this patch according to the
> schematics. Let me know if it works.
> ---
> arch/arm64/boot/dts/allwinner/sun55i-t527-avaota-a1.dts | 17 +++++++++++++++++
> 1 file changed, 17 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/allwinner/sun55i-t527-avaota-a1.dts b/arch/arm64/boot/dts/allwinner/sun55i-t527-avaota-a1.dts
> index 85a546aecdbe149d6bad10327fca1fb7dafff6ad..23ab89c742c679fb274babbb0205f119eb2c9baa 100644
> --- a/arch/arm64/boot/dts/allwinner/sun55i-t527-avaota-a1.dts
> +++ b/arch/arm64/boot/dts/allwinner/sun55i-t527-avaota-a1.dts
> @@ -64,6 +64,23 @@ &ehci1 {
> status = "okay";
> };

As for the Radxa board, we need an alias for ethernet0.

>
> +&emac0 {
> + phy-mode = "rgmii";

As Andrew mentioned, this should probably be "rgmii-id".

> + phy-handle = <&ext_rgmii_phy>;

Can you please add the phy-supply here, it's reg_dcdc4.

Cheers,
Andre

> +
> + allwinner,tx-delay-ps = <100>;
> + allwinner,rx-delay-ps = <300>;
> +
> + status = "okay";
> +};
> +
> +&mdio0 {
> + ext_rgmii_phy: ethernet-phy@1 {
> + compatible = "ethernet-phy-ieee802.3-c22";
> + reg = <1>;
> + };
> +};
> +
> &mmc0 {
> vmmc-supply = <&reg_cldo3>;
> cd-gpios = <&pio 5 6 (GPIO_ACTIVE_LOW | GPIO_PULL_DOWN)>; /* PF6 */
>