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EmbeddedPkg Fdt

Device Tree (DT) is a format used to describe the hardware resources of a specific platform. Lbfdt library (dual license - BSD/GPL) is often used to read or modify the information of the FDT (Flat Device Tree).

The current version of EDK2 used libdft from Wednesday 16th January 2014.

commit 65cc4d2748a2c2e6f27f1cf39e07a5dbabd80ebf
Author: Jon Loeliger <jdl@jdl.com>
Date:   Sat Jun 22 12:54:28 2013 -0500

    Tag Version 1.4.0

    Signed-off-by: Jon Loeliger <jdl@jdl.com>
  • Here are the instructions to update the version of libfdt:

1. Clone the dtc into a temporary directory:

cd $(EDK2_ROOT)/EmbeddedPkg/Library
git clone git://git.jdl.com/software/dtc.git

2. Copy the content of 'libfdt' into EmbeddedPkg/Library/FdtLib/

cd dtc
cp -a libfdt/* ../FdtLib/

3. Copy the libfdt headers:

mv ../FdtLib/libfdt.h ../../Include/
mv ../FdtLib/fdt.h ../../Include/
rm ../FdtLib/libfdt_env.h

  • To add libfdt support to your EDK2 firmware, add the following line to your platform DSC file (required by BdsLib):

    FdtLib|EmbeddedPkg/Library/FdtLib/FdtLib.inf