diff --git a/qcom/sun.dtsi b/qcom/sun.dtsi
index 37f04182..c241a8bb 100644
--- a/qcom/sun.dtsi
+++ b/qcom/sun.dtsi
@@ -179,6 +179,23 @@
 		#mbox-cells = <2>;
 	};
 
+	tcsr_mutex_block: syscon@1f40000 {
+		compatible = "syscon";
+		reg = <0x1f40000 0x20000>;
+	};
+
+	tcsr: syscon@1fc0000 {
+		compatible = "syscon";
+		reg = <0x1fc0000 0x30000>;
+	};
+
+	tcsr_mutex: hwlock {
+		compatible = "qcom,tcsr-mutex";
+		syscon = <&tcsr_mutex_block 0 0x1000>;
+		#hwlock-cells = <1>;
+	};
+
+
 	tlmm: pinctrl@f000000 {
 		compatible = "qcom,sun-tlmm";
 		reg = <0xf000000 0x1000000>;