git: 95b3c32a53 - main - Update serial communication FAQ kernel output
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Date: Tue, 07 Dec 2021 00:17:18 UTC
The branch main has been updated by emaste:
URL: https://cgit.FreeBSD.org/doc/commit/?id=95b3c32a53976e75387f21fa73368c15153b4d41
commit 95b3c32a53976e75387f21fa73368c15153b4d41
Author: Ed Maste <emaste@FreeBSD.org>
AuthorDate: 2021-12-03 19:40:54 +0000
Commit: Ed Maste <emaste@FreeBSD.org>
CommitDate: 2021-12-07 00:11:42 +0000
Update serial communication FAQ kernel output
Serial ports use the uart driver now instead of sio. Original version by
by Arshan Khanifar.
Approved by: ygy (mentor)
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D13961
---
documentation/content/en/books/faq/_index.adoc | 9 ++++-----
1 file changed, 4 insertions(+), 5 deletions(-)
diff --git a/documentation/content/en/books/faq/_index.adoc b/documentation/content/en/books/faq/_index.adoc
index e0b8ad66fc..e940359559 100644
--- a/documentation/content/en/books/faq/_index.adoc
+++ b/documentation/content/en/books/faq/_index.adoc
@@ -2639,14 +2639,13 @@ Either watch the boot messages closely or run this command after the system is u
[source,shell]
....
% grep -E '^(sio|uart)[0-9]' < /var/run/dmesg.boot
-sio0: <16550A-compatible COM port> port 0x3f8-0x3ff irq 4 flags 0x10 on acpi0
-sio0: type 16550A
-sio1: <16550A-compatible COM port> port 0x2f8-0x2ff irq 3 on acpi0
-sio1: type 16550A
+uart0: <16550 or compatible> port 0x3f8-0x3ff irq 4 flags 0x10 on acpi0
+uart0: console (115200,n,8,1)
+uart1: <16550 or compatible> port 0x2f8-2x3ff irq 3 on acpi0
....
This example shows two serial ports.
-The first is on IRQ4, port address `0x3f8`, and has a 16550A-type UART chip.
+The first is on IRQ4, port address `0x3f8`, and has a 16550-type UART chip.
The second uses the same kind of chip but is on IRQ3 and is at port address `0x2f8`.
Internal modem cards are treated just like serial ports, except that they always have a modem attached to the port.