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Documentation/devicetree/bindings/power/reset/msm-poweroff.txt

@@ -9,6 +9,10 @@ Required Properties:
 -compatible: "qcom,pshold"
 -reg: Specifies the physical address of the ps-hold register
 
+Optional Properties:
+-qcom,force-warm-reboot: Issue a warm reboot, even for the traditional cases
+				where hard reboot is issued.
+
 Example:
 
 	restart@fc4ab000 {

arch/arm64/boot/dts/qcom/comma3.dtsi

@@ -633,3 +633,8 @@
 	qcom,wsa-aux-dev-prefix = "SpkrLeft", "SpkrRight", "SpkrLeft", "SpkrRight";*/
 };
 
+&soc {
+  restart@10ac000 {
+    qcom,force-warm-reboot;
+  };
+};

drivers/power/reset/msm-poweroff.c

@@ -304,7 +304,6 @@ static void msm_restart_prepare(const char *cmd)
 				(cmd != NULL && cmd[0] != '\0'));
 	}
 
-    force_warm_reboot = true;
 	if (force_warm_reboot)
 		pr_info("Forcing a warm reset of the system\n");