xref: /openbmc/linux/drivers/pps/Kconfig (revision 023e4163)
1#
2# PPS support configuration
3#
4
5menuconfig PPS
6	tristate "PPS support"
7	---help---
8	  PPS (Pulse Per Second) is a special pulse provided by some GPS
9	  antennae. Userland can use it to get a high-precision time
10	  reference.
11
12	  Some antennae's PPS signals are connected with the CD (Carrier
13	  Detect) pin of the serial line they use to communicate with the
14	  host. In this case use the SERIAL_LINE client support.
15
16	  Some antennae's PPS signals are connected with some special host
17	  inputs so you have to enable the corresponding client support.
18
19	  To compile this driver as a module, choose M here: the module
20	  will be called pps_core.ko.
21
22if PPS
23
24config PPS_DEBUG
25	bool "PPS debugging messages"
26	help
27	  Say Y here if you want the PPS support to produce a bunch of debug
28	  messages to the system log.  Select this if you are having a
29	  problem with PPS support and want to see more of what is going on.
30
31config NTP_PPS
32	bool "PPS kernel consumer support"
33	depends on !NO_HZ_COMMON
34	help
35	  This option adds support for direct in-kernel time
36	  synchronization using an external PPS signal.
37
38	  It doesn't work on tickless systems at the moment.
39
40source "drivers/pps/clients/Kconfig"
41
42source "drivers/pps/generators/Kconfig"
43
44endif # PPS
45