diff --git a/user_space/check_calib_inf.sh b/user_space/check_calib_inf.sh
index 46b61ac..14c43eb 100644
--- a/user_space/check_calib_inf.sh
+++ b/user_space/check_calib_inf.sh
@@ -1,9 +1,30 @@
 #!/bin/bash
 
+set -x
+if test -f "/sys/kernel/debug/iio/iio:device0/direct_reg_access"; then
+  device_path=/sys/kernel/debug/iio/iio:device0/
+else if test -f "/sys/kernel/debug/iio/iio:device1/direct_reg_access"; then
+       device_path=/sys/kernel/debug/iio/iio:device1/
+     else if test -f "/sys/kernel/debug/iio/iio:device2/direct_reg_access"; then
+            device_path=/sys/kernel/debug/iio/iio:device2/
+          else if test -f "/sys/kernel/debug/iio/iio:device3/direct_reg_access"; then
+                 device_path=/sys/kernel/debug/iio/iio:device3/
+               else if test -f "/sys/kernel/debug/iio/iio:device4/direct_reg_access"; then
+                      device_path=/sys/kernel/debug/iio/iio:device4/
+                    else
+                      echo "Check log to make sure ad9361 driver is loaded!"
+                      exit 1
+                    fi
+               fi
+          fi
+     fi
+fi
+set +x
+
 (bash -c 'echo $PPID' > /tmp/check_calib_inf.pid
 while true; do
-	echo 0x0A7 > /sys/kernel/debug/iio/iio:device2/direct_reg_access
-	status=$( cat /sys/kernel/debug/iio/iio:device2/direct_reg_access )
+	echo 0x0A7 > ${device_path}direct_reg_access
+	status=$( cat ${device_path}direct_reg_access )
 	if [ $status == "0xFF" ]; then
 		echo "WARNING: Tx Quadrature Calibration failed."
 	fi