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linux-imx/drivers/pps/Kconfig
Florian Fainelli 1a0f39997c pps: hide more configuration symbols behind CONFIG_PPS 
Make CONFIG_PPS_DEBUG and CONFIG_NTP_PPS be hidden if CONFIG_PPS is not
selected, so that we are not prompted for these configuration options if
CONFIG_PPS is not set.

Signed-off-by: Florian Fainelli <florian@openwrt.org>
Cc: Rodolfo Giometti <giometti@enneenne.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-04-30 17:04:08 -07:00

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PPS support configuration

menu "PPS support"

config PPS tristate "PPS support" ---help--- PPS (Pulse Per Second) is a special pulse provided by some GPS antennae. Userland can use it to get a high-precision time reference.

  Some antennae's PPS signals are connected with the CD (Carrier
  Detect) pin of the serial line they use to communicate with the
  host. In this case use the SERIAL_LINE client support.

  Some antennae's PPS signals are connected with some special host
  inputs so you have to enable the corresponding client support.

  To compile this driver as a module, choose M here: the module
  will be called pps_core.ko.

if PPS

config PPS_DEBUG bool "PPS debugging messages" help Say Y here if you want the PPS support to produce a bunch of debug messages to the system log. Select this if you are having a problem with PPS support and want to see more of what is going on.

config NTP_PPS bool "PPS kernel consumer support" depends on !NO_HZ help This option adds support for direct in-kernel time synchronization using an external PPS signal.

  It doesn't work on tickless systems at the moment.

endif

source drivers/pps/clients/Kconfig

source drivers/pps/generators/Kconfig

endmenu