Date: Sun, 24 May 2015 01:09:52 +0000 (UTC) From: Ian Lepore <ian@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-10@freebsd.org Subject: svn commit: r283342 - stable/10/share/man/man4 Message-ID: <201505240109.t4O19qET019196@svn.freebsd.org>
next in thread | raw e-mail | index | archive | help
Author: ian Date: Sun May 24 01:09:51 2015 New Revision: 283342 URL: https://svnweb.freebsd.org/changeset/base/283342 Log: MFC r280221: Update ucom(4) with information about the new PPS capture abilities. Modified: stable/10/share/man/man4/ucom.4 Directory Properties: stable/10/ (props changed) Modified: stable/10/share/man/man4/ucom.4 ============================================================================== --- stable/10/share/man/man4/ucom.4 Sun May 24 00:53:43 2015 (r283341) +++ stable/10/share/man/man4/ucom.4 Sun May 24 01:09:51 2015 (r283342) @@ -29,7 +29,7 @@ .\" .\" $FreeBSD$ .\" -.Dd March 1, 2008 +.Dd March 11, 2015 .Dt UCOM 4 .Os .Sh NAME @@ -63,11 +63,34 @@ This means that normal programs such as or .Xr ppp 8 can be used to access the device. +.Sh Pulse Per Second (PPS) Timing Interface +The +.Nm +driver can capture PPS timing information as defined in RFC 2783. +The API, accessed via +.Xr ioctl 8 , +is available on the tty device. +To use the PPS capture feature with +.Xr ntpd 8 , +symlink the tty device to +.Va /dev/pps0. .Pp The -.Va portno -locater can be used to decide which port to use for devices that have -multiple external ports. +.Va hw.usb.ucom.pps_mode +sysctl configures the PPS capture mode. +It can be set in +.Xr loader.conf 5 +or +.Xr sysctl.conf 5 . +The following capture modes are available: +.Bl -tag -compact -offset "mmmm" -width "mmmm" +.It 0 +Capture disabled (default). +.It 1 +Capture pulses on the CTS line. +.It 2 +Capture pulses on the DCD line. +.El .Sh FILES .Bl -tag -width ".Pa /dev/cuaU?" .It Pa /dev/cuaU?
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?201505240109.t4O19qET019196>