diff -urN linux-acp-am335x-cpm3-3.12/drivers/tty/serial/omap-serial.c linux-acp-am335x-cpm3-3.12_new/drivers/tty/serial/omap-serial.c
--- linux-acp-am335x-cpm3-3.12/drivers/tty/serial/omap-serial.c	2015-04-03 03:13:07.000000000 +0800
+++ linux-acp-am335x-cpm3-3.12_new/drivers/tty/serial/omap-serial.c	2026-03-27 14:38:47.304278946 +0800
@@ -1441,14 +1441,26 @@
 
 static int serial_omap_suspend(struct device *dev)
 {
+	
 	struct uart_omap_port *up = dev_get_drvdata(dev);
 
+	//逻辑要区分是不是console  
+	//加打印
+	//返回busy
+	//打印加上串口号
+	if(!uart_console(&up->port))
+	{
+		printk("serial_omap_suspend uart port num =%d \n",up->port.line);
+		return -EBUSY;
+	} 
+		
 	uart_suspend_port(&serial_omap_reg, &up->port);
 	flush_work(&up->qos_work);
 
 	/* Select sleep pin state */
 	pinctrl_pm_select_sleep_state(dev);
 
+	
 	return 0;
 }
 
@@ -1808,6 +1820,16 @@
 	if (!up)
 		return -EINVAL;
 
+	//逻辑要区分是不是console  ppty
+	//加打印
+	//返回busy
+	//打印加上串口号
+	if(!uart_console(&up->port))
+	{
+		printk("serial_omap_runtime_suspend uart port num =%d \n",up->port.line);
+		return -EBUSY;
+	} 
+	
 	/*
 	* When using 'no_console_suspend', the console UART must not be
 	* suspended. Since driver suspend is managed by runtime suspend,
二进制文件 linux-acp-am335x-cpm3-3.12/drivers/tty/serial.tar.gz 和 linux-acp-am335x-cpm3-3.12_new/drivers/tty/serial.tar.gz 不同