diff --git a/docs/design/firmware-design.rst b/docs/design/firmware-design.rst
index 1306ecb..669bd96 100644
--- a/docs/design/firmware-design.rst
+++ b/docs/design/firmware-design.rst
@@ -1056,6 +1056,18 @@
 integrating PSCI library with AArch32 EL3 Runtime Software can be found
 at :ref:`PSCI Library Integration guide for Armv8-A AArch32 systems`.
 
+DSU driver
+----------
+
+Platforms that include a DSU (DynamIQ Shared Unit) can define
+the ``USE_DSU_DRIVER`` build flag to enable the DSU driver.
+This driver is responsible for configuring DSU-related powerdown
+and power feature settings using ``dsu_driver_init()`` and for
+preserving the context of DSU PMU system registers.
+
+To support the DSU driver, platforms must define the ``plat_dsu_data``
+structure.
+
 .. _firmware_design_sel1_spd:
 
 Secure-EL1 Payloads and Dispatchers
diff --git a/docs/getting_started/build-options.rst b/docs/getting_started/build-options.rst
index 9d2df33..f99840b 100644
--- a/docs/getting_started/build-options.rst
+++ b/docs/getting_started/build-options.rst
@@ -1119,6 +1119,11 @@
    (Coherent memory region is included) or 0 (Coherent memory region is
    excluded). Default is 1.
 
+-  ``USE_DSU_DRIVER``: This flag enables DSU (DynamIQ Shared Unit) driver.
+   The DSU driver allows save/restore of DSU PMU registers through
+   ``PRESERVE_DSU_PMU_REGS`` build option and allows platforms to
+   configure powerdown and power settings of DSU.
+
 -  ``ARM_IO_IN_DTB``: This flag determines whether to use IO based on the
    firmware configuration framework. This will move the io_policies into a
    configuration device tree, instead of static structure in the code base.