Index: busybox-1.31.1/init/init.c
===================================================================
--- busybox-1.31.1.orig/init/init.c	2019-06-10 18:50:53.000000000 +0800
+++ busybox-1.31.1/init/init.c	2021-03-31 15:11:27.265065800 +0800
@@ -778,6 +778,15 @@
 
 	kill(-1, SIGKILL);
 	message(L_CONSOLE, "Sent SIG%s to all processes", "KILL");
+#ifdef  TCSUPPORT_WAN_GPON
+	message(L_CONSOLE | L_LOG, "Disable PON PHY!!");
+	system("echo gpon startup 2 > /proc/gpon/debug");
+	sleep(1);
+	sync();
+	/*Use the watchdog reset system*/
+	system("killall tcwdog");
+	system("echo 1 > /proc/watchdog_reset");
+#endif
 	sync();
 	/*sleep(1); - callers take care about making a pause */
 }