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Rodolfo Giomettieae9d2b2009-06-17 16:28:37 -07001#
2# PPS support configuration
3#
4
5menu "PPS support"
6
7config PPS
8 tristate "PPS support"
9 depends on EXPERIMENTAL
10 ---help---
11 PPS (Pulse Per Second) is a special pulse provided by some GPS
12 antennae. Userland can use it to get a high-precision time
13 reference.
14
15 Some antennae's PPS signals are connected with the CD (Carrier
16 Detect) pin of the serial line they use to communicate with the
17 host. In this case use the SERIAL_LINE client support.
18
19 Some antennae's PPS signals are connected with some special host
20 inputs so you have to enable the corresponding client support.
21
22 To compile this driver as a module, choose M here: the module
23 will be called pps_core.ko.
24
25config PPS_DEBUG
26 bool "PPS debugging messages"
27 depends on PPS
28 help
29 Say Y here if you want the PPS support to produce a bunch of debug
30 messages to the system log. Select this if you are having a
31 problem with PPS support and want to see more of what is going on.
32
Alexander Gordeev025b40a2011-01-12 17:00:56 -080033config NTP_PPS
34 bool "PPS kernel consumer support"
35 depends on PPS && !NO_HZ
36 help
37 This option adds support for direct in-kernel time
Lucas De Marchi25985ed2011-03-30 22:57:33 -030038 synchronization using an external PPS signal.
Alexander Gordeev025b40a2011-01-12 17:00:56 -080039
40 It doesn't work on tickless systems at the moment.
41
Rodolfo Giometti697fb852010-03-10 15:23:45 -080042source drivers/pps/clients/Kconfig
43
Alexander Gordeev46b402a2011-01-12 17:00:59 -080044source drivers/pps/generators/Kconfig
45
Rodolfo Giomettieae9d2b2009-06-17 16:28:37 -070046endmenu