drivers/pps/Kconfig

   1 #
   2 # PPS support configuration
   3 #
   4
   5 menuconfig 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
  22 config PPS_DEBUG
  23         bool "PPS debugging messages"
  24         depends on PPS
  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
  30 config NTP_PPS
  31         bool "PPS kernel consumer support"
  32         depends on PPS && !NO_HZ_COMMON
  33         help
  34           This option adds support for direct in-kernel time
  35           synchronization using an external PPS signal.
  36
  37           It doesn't work on tickless systems at the moment.
  38
  39 source drivers/pps/clients/Kconfig
  40
  41 source drivers/pps/generators/Kconfig