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.