add gpio led uart

hc

2024-05-10 748e4f3d702def1a4bff191e0cf93b6a05340f01

 kernel/tools/gpio/.gitignore
..
..
@@ -1,4 +1,6 @@
1
+# SPDX-License-Identifier: GPL-2.0-only
1
2
 gpio-event-mon
2
3
 gpio-hammer
4
+gpio-watch
3
5
 lsgpio
4
-
6
+include/linux/gpio.h