MTK7621交换芯片配置

MTK7621上自带的交换芯片为mt7530

admin@OpenWrt:~# /sbin/swconfig list
Found: switch0 - mt7530

交换芯片的配置工具为swconfig程序。MTK7621采用内部的MDIO（Management Data Input/Output）接口管理MT7530的switch芯片。

MT7530共有7个物理口，通过/sbin/swconfig dev switch0 show命令可以查看每个物理口的状态。其中第7个phy接口连接到MTK7621芯片的eth0网口，MTK7621通过MDIO进行寄存器读写配置使用，逻辑框图如下：

通过设备树查看MT7530交换芯片

linux内核源码相对路径

OpenWrt/mtk7621-19.07/build_dir/target-mipsel_24kc_musl/linux-ramips_mt7621/linux-4.14.200

设备树文件路径

/OpenWrt/mtk7621-19.07$ ls target/linux/ramips/dts/ |grep 7621
AP-MT7621A-V60.dts
MT7621.dts
mt7621.dtsi
U7621-06-256M-16M.dts
U7621-06-256M-64M.dts
U7621-06-512M-64M.dts
U7621-06.dtsi

mt7621.dtsi 文件内容

文件名称: target/linux/ramips/dts/mt7621.dtsi

 ethernet: ethernet@1e100000 {compatible = "mediatek,mt7621-eth";   # 对应的驱动程序 soc_mt7621.c 文件中reg = <0x1e100000 0x10000>;#address-cells = <1>;#size-cells = <1>;resets = <&rstctrl 6 &rstctrl 23>;reset-names = "fe", "eth";interrupt-parent = <&gic>;interrupts = <GIC_SHARED 3 IRQ_TYPE_LEVEL_HIGH>;mediatek,switch = <&gsw>;  #交换芯片 mt7530mdio-bus {#address-cells = <1>;#size-cells = <0>;phy1f: ethernet-phy@1f {  # 内部 MDIO 总线描述reg = <0x1f>;phy-mode = "rgmii";};};hnat: hnat@0 {compatible = "mediatek,mt7623-hnat";reg &