# SPDX-License-Identifier: GPL-2.0-only

  #
  # 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.

  if PPS

  config PPS_DEBUG
  	bool "PPS debugging messages"

  	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 !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"

  
  endif # PPS