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1# SPDX-License-Identifier: GPL-2.0-only2#3# PPS clients configuration4#5 6comment "PPS clients support"7 8config PPS_CLIENT_KTIMER9 tristate "Kernel timer client (Testing client, use for debug)"10 help11 If you say yes here you get support for a PPS debugging client12 which uses a kernel timer to generate the PPS signal.13 14 This driver can also be built as a module. If so, the module15 will be called pps-ktimer.16 17config PPS_CLIENT_LDISC18 tristate "PPS line discipline"19 depends on TTY20 help21 If you say yes here you get support for a PPS source connected22 with the CD (Carrier Detect) pin of your serial port.23 24config PPS_CLIENT_PARPORT25 tristate "Parallel port PPS client"26 depends on PARPORT27 help28 If you say yes here you get support for a PPS source connected29 with the interrupt pin of your parallel port.30 31config PPS_CLIENT_GPIO32 tristate "PPS client using GPIO"33 help34 If you say yes here you get support for a PPS source using35 GPIO. To be useful you must also register a platform device36 specifying the GPIO pin and other options, usually in your board37 setup.38