Commit | Line | Data |
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1da177e4 LT |
1 | The SA1100 serial port had its major/minor numbers officially assigned: |
2 | ||
3 | > Date: Sun, 24 Sep 2000 21:40:27 -0700 | |
4 | > From: H. Peter Anvin <hpa@transmeta.com> | |
5 | > To: Nicolas Pitre <nico@CAM.ORG> | |
6 | > Cc: Device List Maintainer <device@lanana.org> | |
7 | > Subject: Re: device | |
8 | > | |
9 | > Okay. Note that device numbers 204 and 205 are used for "low density | |
10 | > serial devices", so you will have a range of minors on those majors (the | |
11 | > tty device layer handles this just fine, so you don't have to worry about | |
12 | > doing anything special.) | |
13 | > | |
14 | > So your assignments are: | |
15 | > | |
16 | > 204 char Low-density serial ports | |
17 | > 5 = /dev/ttySA0 SA1100 builtin serial port 0 | |
18 | > 6 = /dev/ttySA1 SA1100 builtin serial port 1 | |
19 | > 7 = /dev/ttySA2 SA1100 builtin serial port 2 | |
20 | > | |
21 | > 205 char Low-density serial ports (alternate device) | |
22 | > 5 = /dev/cusa0 Callout device for ttySA0 | |
23 | > 6 = /dev/cusa1 Callout device for ttySA1 | |
24 | > 7 = /dev/cusa2 Callout device for ttySA2 | |
25 | > | |
26 | ||
bf6ee0ae AB |
27 | You must create those inodes in /dev on the root filesystem used |
28 | by your SA1100-based device: | |
1da177e4 LT |
29 | |
30 | mknod ttySA0 c 204 5 | |
31 | mknod ttySA1 c 204 6 | |
32 | mknod ttySA2 c 204 7 | |
33 | mknod cusa0 c 205 5 | |
34 | mknod cusa1 c 205 6 | |
35 | mknod cusa2 c 205 7 | |
36 | ||
37 | In addition to the creation of the appropriate device nodes above, you | |
38 | must ensure your user space applications make use of the correct device | |
39 | name. The classic example is the content of the /etc/inittab file where | |
40 | you might have a getty process started on ttyS0. In this case: | |
41 | ||
42 | - replace occurrences of ttyS0 with ttySA0, ttyS1 with ttySA1, etc. | |
43 | ||
44 | - don't forget to add 'ttySA0', 'console', or the appropriate tty name | |
45 | in /etc/securetty for root to be allowed to login as well. | |
46 | ||
47 |