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diff --git a/doc/board/st/stm32mp1.rst b/doc/board/st/stm32mp1.rst
index ee42af6579..b7a0fbfd03 100644
--- a/doc/board/st/stm32mp1.rst
+++ b/doc/board/st/stm32mp1.rst
@@ -25,6 +25,14 @@ It features:
- Standard connectivity, widely inherited from the STM32 MCU family
- Comprehensive security support
+Each line comes with a security option (cryptography & secure boot) and
+a Cortex-A frequency option:
+
+ - A : Cortex-A7 @ 650 MHz
+ - C : Secure Boot + HW Crypto + Cortex-A7 @ 650 MHz
+ - D : Cortex-A7 @ 800 MHz
+ - F : Secure Boot + HW Crypto + Cortex-A7 @ 800 MHz
+
Everything is supported in Linux but U-Boot is limited to:
1. UART