Overview

This page presents how to generate the device tree source and how to compile it to a device tree blob file that Linux needs.

Reference Information

For detailed information about the Device Tree Generator see Device Tree Generator User Guide.

Prerequisites

The following items are required:

• Host PC running Linux (CentOS 6.3+ or Ubuntu 12.04+ are preferred)
• Altera SoC EDS Software - from https://www.altera.com/download/software/soc-eds
• GHRD Archive: sockit_ghrd.tar.gz from sockit_ghrd_14.0.tar.gz

Procedure

1. Compile the GHRD as described in Compiling the Hardware Design to obtain the .sopcinfo file.

2. Start an Embedded Command Shell and go to GHRD folder (assumed here to be saved in the home folder):

$ ~/altera/14.0/embedded/embedded_command_shell.sh
$ cd ~/sockit_ghrd 

3. Run the Device Tree Generator

$ sopc2dts --input soc_system.sopcinfo\
 --output socfpga.dts --type dts\
 --board soc_system_board_info.xml\
 --board hps_common_board_info.xml\
 --bridge-removal all\
 --clocks

This will generate the file sockit_ghrd/socfpga.dts.

4. In order to compile the Device Tree Source file and obtain the Device Tree Blob file run the following command:

$ sopc2dts --input soc_system.sopcinfo\
 --output socfpga.dtb --type dtb\
 --board soc_system_board_info.xml\
 --board hps_common_board_info.xml\
 --bridge-removal all\
 --clocks

This will generate the file sockit_ghrd/socfpga.dtb. that is required by Linux to boot.