[mirror_ubuntu-artful-kernel.git] / drivers / pps / Kconfig

#
# PPS support configuration
#

menuconfig PPS
	tristate "PPS support"
	---help---
	  PPS (Pulse Per Second) is a special pulse provided by some GPS
	  antennae. Userland can use it to get a high-precision time
	  reference.

	  Some antennae's PPS signals are connected with the CD (Carrier
	  Detect) pin of the serial line they use to communicate with the
	  host. In this case use the SERIAL_LINE client support.

	  Some antennae's PPS signals are connected with some special host
	  inputs so you have to enable the corresponding client support.

	  To compile this driver as a module, choose M here: the module
	  will be called pps_core.ko.

config PPS_DEBUG
	bool "PPS debugging messages"
	depends on PPS
	help
	  Say Y here if you want the PPS support to produce a bunch of debug
	  messages to the system log.  Select this if you are having a
	  problem with PPS support and want to see more of what is going on.

config NTP_PPS
	bool "PPS kernel consumer support"
	depends on PPS && !NO_HZ_COMMON
	help
	  This option adds support for direct in-kernel time
	  synchronization using an external PPS signal.

	  It doesn't work on tickless systems at the moment.

source drivers/pps/clients/Kconfig

source drivers/pps/generators/Kconfig
Commit	Line	Data
eae9d2ba RG	1	#
	2	# PPS support configuration
	3	#
	4
98e959d4	5	menuconfig PPS
eae9d2ba	6	tristate "PPS support"
eae9d2ba RG	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
	22	config PPS_DEBUG
	23	bool "PPS debugging messages"
98e959d4	24	depends on PPS
eae9d2ba RG	25	help
	26	Say Y here if you want the PPS support to produce a bunch of debug
	27	messages to the system log. Select this if you are having a
	28	problem with PPS support and want to see more of what is going on.
	29
025b40ab AG	30	config NTP_PPS
025b40ab AG	31	bool "PPS kernel consumer support"
98e959d4	32	depends on PPS && !NO_HZ_COMMON
025b40ab AG	33	help
025b40ab AG	34	This option adds support for direct in-kernel time
25985edc	35	synchronization using an external PPS signal.
025b40ab AG	36
	37	It doesn't work on tickless systems at the moment.
	38
697fb85f RG	39	source drivers/pps/clients/Kconfig
697fb85f RG	40
46b402a0	41	source drivers/pps/generators/Kconfig