diff --git a/docs/integration_guide/porting_TFM_to_a_new_hardware.rst b/docs/integration_guide/porting_TFM_to_a_new_hardware.rst
index b569f98..3a37384 100644
--- a/docs/integration_guide/porting_TFM_to_a_new_hardware.rst
+++ b/docs/integration_guide/porting_TFM_to_a_new_hardware.rst
@@ -69,9 +69,9 @@
 The platform selection when building TF-M is set via the CMake
 variable TFM_PLATFORM. This variable holds part of the path to the platform.
 
-When using -DTFM_PLATFORM="``arm/mps2/an521``" (as in the build instruction example)
+When using ``-DTFM_PLATFORM=arm/mps2/an521`` or ``-DTFM_PLATFORM=an521``
 TF-M build system will look for the platform in
-<TF-M ROOT>/platform/ext/target/``arm/mps2/an521``.
+<TF-M ROOT>/platform/ext/target/arm/mps2/an521.
 
 Therefore all hardware dependent code for your platform should go to
 <TF-M ROOT>/platform/ext/target/.
diff --git a/docs/technical_references/instructions/tfm_build_instruction.rst b/docs/technical_references/instructions/tfm_build_instruction.rst
index 144381a..4f700db 100644
--- a/docs/technical_references/instructions/tfm_build_instruction.rst
+++ b/docs/technical_references/instructions/tfm_build_instruction.rst
@@ -77,12 +77,13 @@
 Required cmake parameters for building TF-M
 -------------------------------------------
 
-+----------------------+-------------------------------------------------------+
-| Parameter            | Description                                           |
-+======================+=======================================================+
-| TFM_PLATFORM         | The target platform as a path from the base directory |
-|                      | ``/platform/ext/target``, or as an absolute path.     |
-+----------------------+-------------------------------------------------------+
+``TFM_PLATFORM`` is required to select the target platform, it can be:
+ - A relative path under ``<TF-M_root>/platform/ext/target``,
+   for example ``arm/mps2/an521``.
+ - An absolute path of target platform, mainly used for out-of-tree platform
+   build.
+ - A target platform name that is supported under
+   <TF-M_root>/platform/ext/target, for example ``an521``.
 
 Build type
 ----------
@@ -531,5 +532,5 @@
 
 --------------
 
-*Copyright (c) 2017-2021, Arm Limited. All rights reserved.*
+*Copyright (c) 2017-2022, Arm Limited. All rights reserved.*
 *Copyright (c) 2022, Cypress Semiconductor Corporation. All rights reserved.*