diff --git a/docs/getting_started/build-options.rst b/docs/getting_started/build-options.rst
index 5980050..68ef4ce 100644
--- a/docs/getting_started/build-options.rst
+++ b/docs/getting_started/build-options.rst
@@ -851,6 +851,9 @@
    hardware will limit the effective VL to the maximum physically supported
    VL.
 
+-  ``TRNG_SUPPORT``: Setting this to ``1`` enables support for True
+   Random Number Generator Interface to BL31 image. This defaults to ``0``.
+
 -  ``TRUSTED_BOARD_BOOT``: Boolean flag to include support for the Trusted Board
    Boot feature. When set to '1', BL1 and BL2 images include support to load
    and verify the certificates and images in a FIP, and BL1 includes support
diff --git a/docs/getting_started/porting-guide.rst b/docs/getting_started/porting-guide.rst
index 6996c17..668af57 100644
--- a/docs/getting_started/porting-guide.rst
+++ b/docs/getting_started/porting-guide.rst
@@ -2468,7 +2468,7 @@
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 This value must be defined to the UUID of the TRNG backend that is specific to
-the hardware after ``plat_trng_setup`` function is called. This value must
+the hardware after ``plat_entropy_setup`` function is called. This value must
 conform to the SMCCC calling convention; The most significant 32 bits of the
 UUID must not equal ``0xffffffff`` or the signed integer ``-1`` as this value in
 w0 indicates failure to get a TRNG source.