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        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
  25config 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
  33config 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
  38          synchronization using an external PPS signal.
  39
  40          It doesn't work on tickless systems at the moment.
  41
  42source drivers/pps/clients/Kconfig
  43
  44source drivers/pps/generators/Kconfig
  45
  46endmenu
  47
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