Module Name: src Committed By: gdt Date: Fri Jul 25 16:13:21 UTC 2014
Modified Files: src/share/man/man4: ucom.4 src/sys/dev/usb: ucom.c Log Message: Add PPS support to ucom(4). This is basically cribbed from regular serial ports, and just adds hooks to call the pps support routines. Also, note in the ucom(4) man page that there is about 1 ms of latency. Discussed on tech-kern in October of 2013, with the only concern being that someone who didn't know what they were doing might set up a stratum 1 server, and that somehow might have worse timekeeping than whatever else that person might have done; the man page comment is a mitigation for this. This patch has been live-tested in netbsd-5/i386 and netbsd-6/i386, and has been running on machines without a USB-serial GPS device for most of a year with no adverse consequences (very little happens if the PPS ioctls are not invoked). To generate a diff of this commit: cvs rdiff -u -r1.23 -r1.24 src/share/man/man4/ucom.4 cvs rdiff -u -r1.105 -r1.106 src/sys/dev/usb/ucom.c Please note that diffs are not public domain; they are subject to the copyright notices on the relevant files.