diff --git a/Documentation/devicetree/bindings/arm/stm32.txt b/Documentation/devicetree/bindings/arm/stm32.txt
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index 000000000000..05762b08a7bb
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+STMicroelectronics STM32 Platforms Device Tree Bindings
+
+Each device tree must specify which STM32 SoC it uses,
+using one of the following compatible strings:
+
+  st,stm32f429
+  st,stm32f469
+  st,stm32f746
+  st,stm32h743