Vim3 m2x扩展板的百兆网口怎么用？

VIM3
1

扩展板上直接连网线，系统中无法看到网络连接，用的ubuntu系统。

2

这个网口不能和板子自带的千兆网口同时使用，这个网口可以用作PoE。

具体信息看这里：

https://www.khadas.cn/product-page/m2x-extension-board

3

我如何才能不使用自带的千兆网而只使用百兆网口呢？

4

@numbqq 请问我如何才能只使用百兆网而不是使用自带的千兆网呢，具体信息里没有写方法，能简单说明下么？

5

你需要修改dts，补丁如下：

diff --git a/arch/arm64/boot/dts/amlogic/kvim3_linux.dts b/arch/arm64/boot/dts/amlogic/kvim3_linux.dts
index 5183c62b27df..2a6b36696e34 100644
--- a/arch/arm64/boot/dts/amlogic/kvim3_linux.dts
+++ b/arch/arm64/boot/dts/amlogic/kvim3_linux.dts
@@ -1393,14 +1393,14 @@
 
 &ethmac {
        status = "okay";
-       pinctrl-names = "external_eth_pins";
-       pinctrl-0 = <&external_eth_pins>;
-       mc_val = <0x1629>;
-
-       cali_val = <0x60000>;
-       rx_delay = <1>;
-       auto_cali_idx = <0>;
-       internal_phy=<0>;
+
+//    pinctrl-names = "internal_eth_pins";
+//    pinctrl-0 = <&internal_eth_pins>;
+
+    mc_val = <0x4be04>;
+
+    internal_phy=<1>;
+
 };
 
 &uart_A {

参考这篇文档更新dtb：

百兆网口识别后log如下：

root@Khadas:~# dmesg | grep eth
[    0.000000] psci: probing for conduit method from DT.
[    0.757698]  ee eth reset:Addr = ffffff8008638008
[    0.768144] meson6-dwmac ff3f0000.ethernet: no reset control found
[    0.775112] eth%d: PHY ID 01803301 at 8 IRQ POLL (stmmac-0:08) active
[    0.776752] usbcore: registered new interface driver cdc_ether
[   10.156172] l2tp_eth: L2TP ethernet pseudowire support (L2TPv3)
[   26.831862] meson6-dwmac ff3f0000.ethernet eth0: fail to init PTP.
[   26.836993] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[   27.767678] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[   57.560429] meson6-dwmac ff3f0000.ethernet eth0: Link is Up - 100Mbps/Full - flow control rx/tx
[   57.560448] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
6

非常感谢您的回复 :+1: :+1: :+1: :+1: