1eae9d2baSRodolfo Giometti# 2eae9d2baSRodolfo Giometti# PPS support configuration 3eae9d2baSRodolfo Giometti# 4eae9d2baSRodolfo Giometti 5eae9d2baSRodolfo Giomettimenu "PPS support" 6eae9d2baSRodolfo Giometti 7eae9d2baSRodolfo Giometticonfig PPS 8eae9d2baSRodolfo Giometti tristate "PPS support" 9eae9d2baSRodolfo Giometti depends on EXPERIMENTAL 10eae9d2baSRodolfo Giometti ---help--- 11eae9d2baSRodolfo Giometti PPS (Pulse Per Second) is a special pulse provided by some GPS 12eae9d2baSRodolfo Giometti antennae. Userland can use it to get a high-precision time 13eae9d2baSRodolfo Giometti reference. 14eae9d2baSRodolfo Giometti 15eae9d2baSRodolfo Giometti Some antennae's PPS signals are connected with the CD (Carrier 16eae9d2baSRodolfo Giometti Detect) pin of the serial line they use to communicate with the 17eae9d2baSRodolfo Giometti host. In this case use the SERIAL_LINE client support. 18eae9d2baSRodolfo Giometti 19eae9d2baSRodolfo Giometti Some antennae's PPS signals are connected with some special host 20eae9d2baSRodolfo Giometti inputs so you have to enable the corresponding client support. 21eae9d2baSRodolfo Giometti 22eae9d2baSRodolfo Giometti To compile this driver as a module, choose M here: the module 23eae9d2baSRodolfo Giometti will be called pps_core.ko. 24eae9d2baSRodolfo Giometti 25eae9d2baSRodolfo Giometticonfig PPS_DEBUG 26eae9d2baSRodolfo Giometti bool "PPS debugging messages" 27eae9d2baSRodolfo Giometti depends on PPS 28eae9d2baSRodolfo Giometti help 29eae9d2baSRodolfo Giometti Say Y here if you want the PPS support to produce a bunch of debug 30eae9d2baSRodolfo Giometti messages to the system log. Select this if you are having a 31eae9d2baSRodolfo Giometti problem with PPS support and want to see more of what is going on. 32eae9d2baSRodolfo Giometti 33*025b40abSAlexander Gordeevconfig NTP_PPS 34*025b40abSAlexander Gordeev bool "PPS kernel consumer support" 35*025b40abSAlexander Gordeev depends on PPS && !NO_HZ 36*025b40abSAlexander Gordeev help 37*025b40abSAlexander Gordeev This option adds support for direct in-kernel time 38*025b40abSAlexander Gordeev syncronization using an external PPS signal. 39*025b40abSAlexander Gordeev 40*025b40abSAlexander Gordeev It doesn't work on tickless systems at the moment. 41*025b40abSAlexander Gordeev 42697fb85fSRodolfo Giomettisource drivers/pps/clients/Kconfig 43697fb85fSRodolfo Giometti 44eae9d2baSRodolfo Giomettiendmenu 45