# Regular Meeting (2021.10.18)

* About Derived Device Tree(DDT)

## About Derived Device Tree(DDT)

* [Outline Refer to here (Step.6)](http://www.digilent.com.cn/community/727.html?fbclid=IwAR2eaR6d7CAOORsoNZepL1CPfIHb8NB84R_629Sj7yaRz6qgKfoP07IgRmY)

* Problem: How to bind Base-DT and Derived-DT

PL-DT

/*
 * CAUTION: This file is automatically generated by Xilinx.
 * Version: HSI 
 * Today is: Wed Dec 24 14:52:20 2014
*/
 
	&amba {
		ranges ;
		axi_jtag_0: axi-jtag@43c00000 {
			compatible = "generic-uio";
			reg = <0x43c00000 0x10000>;
		};
	};

// refer here
// https://qiita.com/7of9/items/43e650f2e7d9c55da175
&gem0 {
  #address-cells = <1>;
  phy-handle = <&phy0>;
  phy-mode = "rgmii-id";
  reg = <0xe000b000 0x1000>;
  xlnx,eth-mode = <0x1>;
  xlnx,has-mdio = <0x1>;
  xlnx,ptp-enet-clock = <108333336>;
  mdio {
    #address-cells = <1>;
    #size-cells = <0>;
    phy0: phy@1 {
      compatible = "realtek,RTL8211E";
      device_type = "ethernet-phy";
      reg = <1>;
      } ;
  } ;
};

###### tags: `Regular Meeting` `DeWei`