[CentOS] How do I configure additional serial ports?
Alfred von Campe
alfred at 110.net
Mon Mar 12 18:41:27 UTC 2007
On Mar 12, 2007, at 13:15, James Olin Oden wrote:
> As I understand it you can also set the kernel command line arg
> 8250.nr_uarts equal to some value like 8, 16, 32, etc, without having
> to rebuild your kernel (i.e. go into grub.conf and add to your kernel
> line " 8250.nr_uarts=32").
I tried this, but it didn't work. I probably also need the
CONFIG_SERIAL_8250_MANY_PORTS option enabled, and that probably can't
be set on the kernel command line.
> IIRC, what you have to do is create a udev rule so that you can cause
> your serial port naming to persist the way you want. I've never
> created one myself, but we have done that in my group where I work, so
> the problem is familiar to me.
I wrote a udev rule once (it was for setting permissions on a
device), so I am somewhat familiar with this. I'll see if I can
write a rule that uses better names for the serial ports.
More information about the CentOS