## PPS clients configuration#if PPScomment "PPS clients support"config PPS_CLIENT_KTIMER tristate "Kernel timer client (Testing client, use for debug)" help If you say yes here you get support for a PPS debugging client which uses a kernel timer to generate the PPS signal. This driver can also be built as a module. If so, the module will be called pps-ktimer.
config PPS_CLIENT_LDISC tristate "PPS line discipline" depends on PPS help If you say yes here you get support for a PPS source connected with the CD (Carrier Detect) pin of your serial port.