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diff --git a/dts/Bindings/firmware/meson/meson_sm.txt b/dts/Bindings/firmware/meson/meson_sm.txt
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+++ b/dts/Bindings/firmware/meson/meson_sm.txt
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+* Amlogic Secure Monitor
+
+In the Amlogic SoCs the Secure Monitor code is used to provide access to the
+NVMEM, enable JTAG, set USB boot, etc...
+
+Required properties for the secure monitor node:
+- compatible: Should be "amlogic,meson-gxbb-sm"
+
+Example:
+
+	firmware {
+		sm: secure-monitor {
+			compatible = "amlogic,meson-gxbb-sm";
+		};
+	};