linux/drivers/pps/Kconfig
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   1#
   2# PPS support configuration
   3#
   4
   5menu "PPS support"
   6
   7config PPS
   8        tristate "PPS support"
   9        ---help---
  10          PPS (Pulse Per Second) is a special pulse provided by some GPS
  11          antennae. Userland can use it to get a high-precision time
  12          reference.
  13
  14          Some antennae's PPS signals are connected with the CD (Carrier
  15          Detect) pin of the serial line they use to communicate with the
  16          host. In this case use the SERIAL_LINE client support.
  17
  18          Some antennae's PPS signals are connected with some special host
  19          inputs so you have to enable the corresponding client support.
  20
  21          To compile this driver as a module, choose M here: the module
  22          will be called pps_core.ko.
  23if PPS
  24
  25config PPS_DEBUG
  26        bool "PPS debugging messages"
  27        help
  28          Say Y here if you want the PPS support to produce a bunch of debug
  29          messages to the system log.  Select this if you are having a
  30          problem with PPS support and want to see more of what is going on.
  31
  32config NTP_PPS
  33        bool "PPS kernel consumer support"
  34        depends on !NO_HZ
  35        help
  36          This option adds support for direct in-kernel time
  37          synchronization using an external PPS signal.
  38
  39          It doesn't work on tickless systems at the moment.
  40
  41endif
  42
  43source drivers/pps/clients/Kconfig
  44
  45source drivers/pps/generators/Kconfig
  46
  47endmenu
  48
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