diff --git a/Documentation/devicetree/bindings/arm/stm32/st,stm32-syscon.yaml b/Documentation/devicetree/bindings/arm/stm32/st,stm32-syscon.yaml
index d083d8ad48b7..ed97652c8492 100644
--- a/Documentation/devicetree/bindings/arm/stm32/st,stm32-syscon.yaml
+++ b/Documentation/devicetree/bindings/arm/stm32/st,stm32-syscon.yaml
@@ -21,6 +21,8 @@ properties:
               - st,stm32f4-gcan
               - st,stm32mp151-pwr-mcu
               - st,stm32mp157-syscfg
+              - st,stm32mp21-syscfg
+              - st,stm32mp23-syscfg
               - st,stm32mp25-syscfg
           - const: syscon
       - items: