修改内核源码arch/arm/mach-s3c2440/mach-smdk2440.c文件的100行，将其改为：

1
.ulcon =0x03,

修改drivers/serial/samsung.c文件的53行添加如下内容：

1
#include <mach/regs-gpio.h>

然后在397行左右，函数static int s3c24xx_serial_startup(struct uart_port *port)之前添加

1
2
3
extern void s3c2410_gpio_cfgpin(unsigned int pin, unsigned int function);
extern void s3c2410_gpio_pullup(unsigned int pin, unsigned int to);

然后在462行左右添加以下注释说明处的代码：

1
2
3
4
5
6
7
8
9
10
11
12
13
dbg("s3c24xx_serial_startup ok\n");
//添加以下代码
if (port->line == 2) {
    s3c2410_gpio_cfgpin(S3C2410_GPIONO(S3C2410_GPIO_BANKH, 6), S3C2410_GPH6_TXD2);
    s3c2410_gpio_pullup(S3C2410_GPIONO(S3C2410_GPIO_BANKH, 6), 1);
    s3c2410_gpio_cfgpin(S3C2410_GPIONO(S3C2410_GPIO_BANKH, 7), S3C2410_GPH7_RXD2);
    s3c2410_gpio_pullup(S3C2410_GPIONO(S3C2410_GPIO_BANKH, 7), 1);
}
//添加以上代码
return ret;
 err:
s3c24xx_serial_shutdown(port);
return ret;

下面列出串口配置情况：

1
2
3
4
5
6
7
8
Device Drivers  -->
    Character devices  -->
        Serial drivers  -->
            <>8250/16550 and compatible serial support
              ***Non-8250 serial port support***
            <*>Samsung SoC serial support
            [*]Support for console on Samsung SoC serial port
            <*>Samsung S3C2440/S3C2442 Serial port support