diff --git a/buildroot-2021.05/board/milkv/duo/overlay/etc/init.d/S99user b/buildroot-2021.05/board/milkv/duo/overlay/etc/init.d/S99user
index 362c909e0..32b524845 100755
--- a/buildroot-2021.05/board/milkv/duo/overlay/etc/init.d/S99user
+++ b/buildroot-2021.05/board/milkv/duo/overlay/etc/init.d/S99user
@@ -15,6 +15,10 @@ case "$1" in
 
         echo "Starting app..."
 
+        if [ -f $SYSTEMPATH/duo-init.sh ]; then
+                . $SYSTEMPATH/duo-init.sh &
+        fi
+
         if [ -f $SYSTEMPATH/blink.sh ]; then
                 . $SYSTEMPATH/blink.sh &
         fi
diff --git a/milkv/overlay/mnt/system/duo-init.sh b/milkv/overlay/mnt/system/duo-init.sh
new file mode 100755
index 000000000..c946b090e
--- /dev/null
+++ b/milkv/overlay/mnt/system/duo-init.sh
@@ -0,0 +1,6 @@
+#!/bin/sh
+
+# set PWR_GPIO[4] to gpio
+devmem 0x0502707c 32 0x111
+devmem 0x03001068 32 0x3
+