28 Apr, 2016
1 commit
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Signed-off-by: Eric Engestrom
Signed-off-by: Jonathan Corbet
15 Jul, 2015
1 commit
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This patch fix a file name of example code.
Signed-off-by: Masanari Iida
Acked-by: Rodolfo Giometti
Signed-off-by: Jonathan Corbet
22 Jun, 2015
1 commit
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This patch fix a spelling typo in Documentation/pps/pps.txt
Signed-off-by: Masanari Iida
Acked-by: Rodolfo Giometti
[jc: did s/into/in the/ on the same line while we were there]
Signed-off-by: Jonathan Corbet
27 Sep, 2013
1 commit
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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
Acked-by: Rodolfo Giometti
Signed-off-by: Greg Kroah-Hartman
14 Jan, 2011
1 commit
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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
Acked-by: Rodolfo Giometti
Cc: john stultz
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
19 Jun, 2009
1 commit
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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
Cc: David Woodhouse
Cc: Greg KH
Cc: Randy Dunlap
Cc: Kay Sievers
Acked-by: Alan Cox
Cc: Michael Kerrisk
Cc: Christoph Hellwig
Cc: Roman Zippel
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds