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.
  23
  24config PPS_DEBUG
  25        bool "PPS debugging messages"
  26        depends on PPS
  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 PPS && !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
  41source drivers/pps/clients/Kconfig
  42
  43source drivers/pps/generators/Kconfig
  44
  45endmenu
  46
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