1# 2# PPS clients configuration 3# 4 5comment "PPS clients support" 6 7config PPS_CLIENT_KTIMER 8 tristate "Kernel timer client (Testing client, use for debug)" 9 help 10 If you say yes here you get support for a PPS debugging client 11 which uses a kernel timer to generate the PPS signal. 12 13 This driver can also be built as a module. If so, the module 14 will be called pps-ktimer. 15 16config PPS_CLIENT_LDISC 17 tristate "PPS line discipline" 18 depends on TTY 19 help 20 If you say yes here you get support for a PPS source connected 21 with the CD (Carrier Detect) pin of your serial port. 22 23config PPS_CLIENT_PARPORT 24 tristate "Parallel port PPS client" 25 depends on PARPORT 26 help 27 If you say yes here you get support for a PPS source connected 28 with the interrupt pin of your parallel port. 29 30config PPS_CLIENT_GPIO 31 tristate "PPS client using GPIO" 32 help 33 If you say yes here you get support for a PPS source using 34 GPIO. To be useful you must also register a platform device 35 specifying the GPIO pin and other options, usually in your board 36 setup. 37