[PATCH V4 4/6] doc: ti: k3: Add TIFS Stub documentation

[Dhruva Gole]

Add documentation to briefly explain the role of TIFS Stub in relevant
K3 SoC's.

Signed-off-by: Dhruva Gole <d-gole at ti.com>
---
 doc/board/ti/k3.rst | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/doc/board/ti/k3.rst b/doc/board/ti/k3.rst
index 67b066a07d3a..2f63852b3801 100644
--- a/doc/board/ti/k3.rst
+++ b/doc/board/ti/k3.rst
@@ -193,6 +193,11 @@ online
     device resources such as power, clock, interrupts, dma etc. This firmware
     runs on a dedicated or multi-use microcontroller outside the security
     enclave.
+  * **TIFS Stub** - A small piece of code that helps restore the remaining
+    context and resume the TIFS firmware when resuming from Low Power Modes
+    like Suspend-to-RAM/ Deep Sleep. It is loaded into the ATCM (Tightly
+    Coupled Memory 'A' of the DM R5) during DM startup. This applies only
+    to AM62x, AM62A and AM62P based devices.
 
  OR
 
-- 
2.34.1