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

#
# PPS support configuration
#

menu "PPS support"

config PPS
	tristate "PPS support"
	depends on EXPERIMENTAL
	---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
	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

endmenu
Commit	Line	Data
eae9d2ba RG	1	#
	2	# PPS support configuration
	3	#
	4
	5	menu "PPS support"
	6
	7	config 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
	25	config 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
025b40ab AG	33	config 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
25985edc	38	synchronization using an external PPS signal.
025b40ab AG	39
	40	It doesn't work on tickless systems at the moment.
	41
697fb85f RG	42	source drivers/pps/clients/Kconfig
697fb85f RG	43
46b402a0 AG	44	source drivers/pps/generators/Kconfig
46b402a0 AG	45
eae9d2ba	46	endmenu