how to use 2nd serial port under embedded system?

[ubuntu_amateur]

On the emulation board, there are 2 serial ports.
One is used as console connected to PC via serial cable;
I wanna use the other one, but there is no ttyS1 in /dev directory.
Under /dev, the relevant inod files are "console" and "tty".

Insmod a driver for serial port, but it doesn't return MAJOR number.
If MAJOR returns, I can create an inode by:
mknod /dev/ttyS1 c MAJOR MINOR

How can I use the 2nd serial port under embedded system?
Could somebody help me?

Thanks in advance.

 

[budhy]

Which emulation board you use?

 

[ubuntu_amateur]

r8610. have you even heard that?

 

[xiaohua]

Is it under Linux OS ?

 

[ubuntu_amateur]

yes. kernel version is 2.4.25.

 

[budhy]

Take a look at :
http://tldp.org/HOWTO/Modem-HOWTO-9.html
http://tldp.org/HOWTO/Modem-HOWTO-9.html
**broken link removed**

 

[xiaohua]

Plz make sure your kernel has make correct configuation about the 2nd serial port.