2 # PPS clients configuration
5 comment "PPS clients support"
7 config PPS_CLIENT_KTIMER
8 tristate "Kernel timer client (Testing client, use for debug)"
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.
13 This driver can also be built as a module. If so, the module
14 will be called pps-ktimer.
16 config PPS_CLIENT_LDISC
17 tristate "PPS line discipline"
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.
23 config PPS_CLIENT_PARPORT
24 tristate "Parallel port PPS client"
27 If you say yes here you get support for a PPS source connected
28 with the interrupt pin of your parallel port.
30 config PPS_CLIENT_GPIO
31 tristate "PPS client using GPIO"
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