doc: board: ti: k3: Add a guide to debugging with OpenOCD

Bootloader debug usually tends to be a bit dicey prior to DDR and
serial port getting active in the system. JTAG typically remains the
only practical debug option during the initial bringup.

OpenOCD is one of the most popular environment for providing debug
capability via a GDB compatible interface for developers to work with.

Debugging U-Boot and bootloaders on K3 platform does have a bit of
tribal knowledge that is better documented in our common platform
documentation.

Signed-off-by: Jason Kacines <j-kacines@ti.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
diff --git a/doc/board/ti/am65x_evm.rst b/doc/board/ti/am65x_evm.rst
index 0129235..5f3c46c 100644
--- a/doc/board/ti/am65x_evm.rst
+++ b/doc/board/ti/am65x_evm.rst
@@ -287,3 +287,27 @@
  sb --ymodem tispl.bin > $MAIN_DEV < $MAIN_DEV
  sleep 1
  sb --xmodem u-boot.img > $MAIN_DEV < $MAIN_DEV
+
+Debugging U-Boot
+----------------
+
+See :ref:`Common Debugging environment - OpenOCD<k3_rst_refer_openocd>`: for
+detailed setup information.
+
+.. warning::
+
+  **OpenOCD support since**: v0.12.0
+
+  If the default package version of OpenOCD in your development
+  environment's distribution needs to be updated, it might be necessary to
+  build OpenOCD from the source.
+
+.. include::  k3.rst
+    :start-after: .. k3_rst_include_start_openocd_connect_XDS110
+    :end-before: .. k3_rst_include_end_openocd_connect_XDS110
+
+To start OpenOCD and connect to the board
+
+.. code-block:: bash
+
+  openocd -f board/ti_am654evm.cfg