根据需求，将复位按钮的功能更改为关机

power.c

@@ -283,9 +283,9 @@ static void delay_work_func(struct work_struct *work)
         wake_up_interruptible(&chardev_dev->read_queue);
     }
     
-    if(rst_flag >= 3)
+    if(rst_flag >= 1)
     {
-        chardev_dev->status = 'R';
+        chardev_dev->status = 'P';
         chardev_dev->data_len = 1;
         wake_up_interruptible(&chardev_dev->read_queue);
     }