如何實現openwrt 在32M spi flash上執行
Cup是MT7620a ，Openwrt預設是支援8M Flash ，而如想在16M或32 M flash 上面執行需要在openwrt原始碼裡面修改MT7620a.dts檔案,其所在目錄如下

[email protected]: /home/topeet/git/openwrt/chaos_calmer/target/linux/ramips/dts

進入目錄

cd git/openwrt/chaos_calmer/target/linux/ramips/dts

編輯MT7620a.dts 檔案

 vi MT7620a.dts
 

修改 MT7620a.dts
將：

[email protected] {
        label = "firmware";
        reg = <0x50000 0x7b0000>;
 };

改為：

[email protected] {
         label = "firmware";
         reg = <0x50000 0x1fb0000>;
 };

刪除以下內容：

[email protected]{
status = “okay”;
phy-mode = “rgmil”;
phy-handle = <&phy4>;
};

 
[email protected]{
status = “okay”;
phy-mode = “rgmil”;
phy-handle = <&phy5>;
};

mdio-bus{
Status = “okay”;
phy4: [email protected]{
Reg = <4>;
phy-mode = “rgmii”
};
Phy5: [email protected]{
Reg = <5>;
phy-mode = “rgmii”
};
};

儲存退出 在openwrt頂層目錄編譯
make V=99
編譯出來的韌體，就能支援32M、16M、和8M的SPI Flash 了