mirror of
https://github.com/a52xq-dev/kernel.git
synced 2026-10-18 21:58:11 +07:00
| SHA1 | ||
|---|---|---|
Collection of aesthetic adjustments to various PPS-related files, directories and Documentation, some quite minor just for the sake of consistency, including: * Updated example of pps device tree node (courtesy Rodolfo G.) * "PPS-API" -> "PPS API" * "pps_source_info_s" -> "pps_source_info" * "ktimer driver" -> "pps-ktimer driver" * "ppstest /dev/pps0" -> "ppstest /dev/pps1" to match example * Add missing PPS-related entries to MAINTAINERS file * Other trivialities Link: http://lkml.kernel.org/r/alpine.LFD.2.20.1708261048220.8106@localhost.localdomain Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca> Acked-by: Rodolfo Giometti <giometti@enneenne.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> 
Robert P. J. Day
authored and
 Linus Torvalds
commited |
a2d8180301 | |
Even though the jitter due to USB1.1 may be 1ms, NTP can reduce its effect significantly. And USB2.0 reduces this anyway. Signed-off-by: Sanjeev Gupta <ghane0@gmail.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net> 
Sanjeev
authored and
 Jonathan Corbet
commited |
f2c1a053ce | |
No semantic changes. The next patch in this series will do the actual changes to sync with NTP current best practices Signed-off-by: Sanjeev Gupta <ghane0@gmail.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Sanjeev
authored and
Jonathan Corbet
commited |
fe4c56c98c | |
timepps.h , as well as PPS sample test utilities, are no longer in the kernel tree. Update documentation to point to new locations. Signed-off-by: Sanjeev Gupta <ghane0@gmail.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Sanjeev
authored and
Jonathan Corbet
commited |
e1235e18b5 | |
Signed-off-by: Eric Engestrom <eric@engestrom.ch> Signed-off-by: Jonathan Corbet <corbet@lwn.net> 
Eric Engestrom
authored and
Jonathan Corbet
commited |
c0270efc51 | |
This patch fix a file name of example code. Signed-off-by: Masanari Iida <standby24x7@gmail.com> Acked-by: Rodolfo Giometti <giometti@enneenne.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net> 
Masanari Iida
authored and
Jonathan Corbet
commited |
5d250eeb9d | |
This patch fix a spelling typo in Documentation/pps/pps.txt Signed-off-by: Masanari Iida <standby24x7@gmail.com> Acked-by: Rodolfo Giometti <giometti@enneenne.com> [jc: did s/into/in the/ on the same line while we were there] Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Masanari Iida
authored and
Jonathan Corbet
commited |
ce9ae951d4 | |
The DCD pin of the serial port can receive a PPS signal. By calling the port line discipline dcd handle, this patch allow to monitor PPS through USB serial devices. However the performance aren't as good as the uart drivers, so document this point too. Signed-off-by: Paul Chavent <paul.chavent@onera.fr> Acked-by: Rodolfo Giometti <giometti@enneenne.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
Paul Chavent
authored and
 Greg Kroah-Hartman
commited |
833efc0ed1 | |
Add PPS signal generator which utilizes STROBE pin of a parallel port to send PPS signals. It uses parport abstraction layer and hrtimers to precisely control the signal. [akpm@linux-foundation.org: fix build] Signed-off-by: Alexander Gordeev <lasaine@lvk.cs.msu.su> Acked-by: Rodolfo Giometti <giometti@linux.it> Cc: john stultz <johnstul@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> 
Alexander Gordeev
authored and
Linus Torvalds
commited |
46b402a0e5 | |
This patch adds the kernel side of the PPS support currently named "LinuxPPS". PPS means "pulse per second" and a PPS source is just a device which provides a high precision signal each second so that an application can use it to adjust system clock time. Common use is the combination of the NTPD as userland program with a GPS receiver as PPS source to obtain a wallclock-time with sub-millisecond synchronisation to UTC. To obtain this goal the userland programs shoud use the PPS API specification (RFC 2783 - Pulse-Per-Second API for UNIX-like Operating Systems, Version 1.0) which in part is implemented by this patch. It provides a set of chars devices, one per PPS source, which can be used to get the time signal. The RFC's functions can be implemented by accessing to these char devices. Signed-off-by: Rodolfo Giometti <giometti@linux.it> Cc: David Woodhouse <dwmw2@infradead.org> Cc: Greg KH <greg@kroah.com> Cc: Randy Dunlap <randy.dunlap@oracle.com> Cc: Kay Sievers <kay.sievers@vrfy.org> Acked-by: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Michael Kerrisk <mtk.manpages@googlemail.com> Cc: Christoph Hellwig <hch@infradead.org> Cc: Roman Zippel <zippel@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> 
Rodolfo Giometti
authored and
Linus Torvalds
commited |
eae9d2ba0c |