serial port problem?

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I have a problem with my serial port /dev/ttyS1 and /dev/ttyS2. My /dev/ttyS0 works fine. All the three ports have proper I/O addresses and IRQ set in hardware and also  the serial driver knows abt it. I can see the I/O addresses and IRQ numbers for the 3 UARTs by /proc/tty/driver/serial
Someone please help as to how do I make my other 2 serial ports i.e., /dev/ttyS1 and /dev/ttyS2 work?
--
"There are 10 people in the world - those who understand binary and those who dont !"

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