Re: [PATCH v4 2/2] arm64: dts: rockchip: Add rk3576 evb2 board

Chaoyi Chen
2026-01-22T01:46:35Z

Hi Andrew,

On 1/21/2026 9:15 PM, Andrew Lunn wrote:
>> +&mdio0 {
>> + rgmii_phy0: ethernet-phy@1 {
>> + compatible = "ethernet-phy-ieee802.3-c22";
>> + reg = <0x1>;
>> + pinctrl-names = "default";
>> + pinctrl-0 = <&rgmii_phy0_rst>;
>> + reset-assert-us = <20000>;
>> + reset-deassert-us = <100000>;
>> + reset-gpios = <&gpio3 RK_PD3 GPIO_ACTIVE_LOW>;
>> + tx-internal-delay-ps = <1900>;
>
> What PHY is this? Does it actually implement this property?
>
> It is also close to the 2000ps default. Have you put the board in an
> environment chamber and run tests at -20C to +70C to see if it will
> work with the default 2000ps?
>

It is MotorComm yt8xxx PHY. I chose 1950 here because I find that
the MotorComm PHY binding only offer the options of 1950 or 2100.

--
Best,
Chaoyi