1#
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
33config 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
38	  synchronization using an external PPS signal.
39
40	  It doesn't work on tickless systems at the moment.
41
42source drivers/pps/clients/Kconfig
43
44source drivers/pps/generators/Kconfig
45
46endmenu
47