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+TF-A CoT dt2c Tool
+==================
+
+This tool is used to automatically generate the corresponding c file for a
+CoT DT file. Since currently TF-A support two type of CoT file: static c file
+and CoT DT binding. This is error prone and hard to maintain, therefore this
+tool can generate the c file for the platform that does not support CoT DT
+binding, given the CoT DT file so the c file can be deprecated.
+
+Prerequisites
+~~~~~~~~~~~~~
+
+#. Python (3.8 or later)
+#. `Poetry`_ Python package manager
+
+
+Getting Started
+~~~~~~~~~~~~~~~
+
+#. Install the tool
+
+    .. code::
+
+        make install
+
+
+#. Verify that the tool runs correctly
+
+    .. code::
+
+        make test
+
+
+#. Usage of the tool
+
+    .. code::
+
+        cot-dt2c
+
+    This command will output the following as usage for this command
+
+    .. code-block:: text
+
+        Usage: cot-dt2c [OPTIONS] COMMAND [ARGS]...
+
+        Options:
+        --version  Show the version and exit.
+        --help     Show this message and exit.
+
+        Commands:
+        convert-to-c
+        validate-cot
+        visualize-cot
+        validate-dt
+
+#. Uninstall the tool
+    .. code::
+
+        make uninstall
+
+    This command will uninstall the tool
+
+
+#. Uninstall the tool and clean all the build file
+    .. code::
+
+        make clean
+
+    This command will clean all the build file and implicitly uninstall the tool
+
+
+#. Call the make file from TF-A root directory
+    .. code::
+
+        make -C tools/cot-dt2c install
+        make -C tools/cot-dt2c uninstall
+        make -C tools/cot-dt2c clean
+
+Convert CoT descriptors to C file
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+To convert the CoT descriptors
+
+This command is for the platform that does not use CoT DT parser,
+which can generate the C file given the CoT descriptors. Before
+the conversion to C file, the tool will do an implicit checks on
+the validity of the CoT DT file.
+
+.. code::
+
+    cot-dt2c convert-to-c [INPUT DTB PATH] [OUTPUT C PATH]
+    cot-dt2c convert-to-c fdts/tbbr_cot_descriptors.dtsi test.c
+
+
+Validate CoT descriptors
+~~~~~~~~~~~~~~~~~~~~~~~~~
+
+To validate the certificate
+
+The tests folder in the tool folder provides some bad-example of the
+DT file, and the tool will print out "not a valid CoT DT file" on console.
+
+The command will check the format of the CoT file
+
+#. The open bracket
+#. The open ifdef macro
+#. The missing mandatory attribute
+#. Malformed DT file (cert missing parent, missing root certs. etc.)
+
+Currently the validation is specifically for checking the CoT DT file
+
+.. code::
+
+    cot-dt2c validate-cot [INPUT DTB PATH]
+    cot-dt2c validate-cot fdts/tbbr_cot_descriptors.dtsi
+
+
+Visualize CoT descriptors
+~~~~~~~~~~~~~~~~~~~~~~~~~
+
+This command create a HTML to visualize the relationship between
+the certificates and the image of a CoT DT file.
+
+.. code::
+
+    cot-dt2c visualize-cot [INPUT DTB PATH]
+    cot-dt2c visualize-cot fdts/tbbr_cot_descriptors.dtsi
+
+
+Validate Other DT files
+~~~~~~~~~~~~~~~~~~~~~~~
+
+The command will transform the dtsi/dts file into a more standard
+dtsi/dts file inside /tmp folder that can be used as input to dt-schema
+for further validation. Currently the tool will perform some basic validation
+for the file (syntax) and dt-schema can be used for advance checks. dt-schema
+is not installed along with the tool.
+
+.. code::
+
+    cot-dt2c validate-dt [INPUT DTS PATH or INPUT DTS folder]
+    cot-dt2c validate-dt fdts/
+    cot-dt2c validate-dt fdts/fvp-bsae-gicv3.dtsi
+
+--------------
+
+*Copyright (c) 2024, Arm Limited. All rights reserved.*
+
+.. _Poetry: https://python-poetry.org/docs/