CentOS 5 Hardware :: 5.5 - Does Currently Not Support Oxford's OXPCIe952-F Serial Controller Chip

Is it possible that CentOS 5.5 does currently not support Oxford's OXPCIe952-F serial controller chip? We've added one of those PCIe x1 cards to one of our servers since we need additional serial interfaces but it doesn't seem to work. Instead of three serial ports (the server comes with one already, the controller adds two more) we still only have ttyS0:

Quote:

root/linux2$ zgrep ttyS /var/log/*
/var/log/dmesg:serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
/var/log/dmesg:00:08: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A

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