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-The SA1100 serial port had its major/minor numbers officially assigned:
-
-> Date: Sun, 24 Sep 2000 21:40:27 -0700
-> From: H. Peter Anvin <hpa@transmeta.com>
-> To: Nicolas Pitre <nico@CAM.ORG>
-> Cc: Device List Maintainer <device@lanana.org>
-> Subject: Re: device
->
-> Okay. Note that device numbers 204 and 205 are used for "low density
-> serial devices", so you will have a range of minors on those majors (the
-> tty device layer handles this just fine, so you don't have to worry about
-> doing anything special.)
->
-> So your assignments are:
->
-> 204 char Low-density serial ports
-> 5 = /dev/ttySA0 SA1100 builtin serial port 0
-> 6 = /dev/ttySA1 SA1100 builtin serial port 1
-> 7 = /dev/ttySA2 SA1100 builtin serial port 2
->
-> 205 char Low-density serial ports (alternate device)
-> 5 = /dev/cusa0 Callout device for ttySA0
-> 6 = /dev/cusa1 Callout device for ttySA1
-> 7 = /dev/cusa2 Callout device for ttySA2
->
-
-You must create those inodes in /dev on the root filesystem used
-by your SA1100-based device:
-
- mknod ttySA0 c 204 5
- mknod ttySA1 c 204 6
- mknod ttySA2 c 204 7
- mknod cusa0 c 205 5
- mknod cusa1 c 205 6
- mknod cusa2 c 205 7
-
-In addition to the creation of the appropriate device nodes above, you
-must ensure your user space applications make use of the correct device
-name. The classic example is the content of the /etc/inittab file where
-you might have a getty process started on ttyS0. In this case:
-
-- replace occurrences of ttyS0 with ttySA0, ttyS1 with ttySA1, etc.
-
-- don't forget to add 'ttySA0', 'console', or the appropriate tty name
- in /etc/securetty for root to be allowed to login as well.
-
-