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Linux/drivers/pps/Kconfig

  1 #
  2 # PPS support configuration
  3 #
  4 
  5 menu "PPS support"
  6 
  7 config 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 if PPS
 24 
 25 config 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 
 32 config 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 
 41 endif
 42 
 43 source drivers/pps/clients/Kconfig
 44 
 45 source drivers/pps/generators/Kconfig
 46 
 47 endmenu

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