1 # SPDX-License-Identifier: GPL-2.0-only
3 # PPS clients configuration
6 comment "PPS clients support"
8 config PPS_CLIENT_KTIMER
9 tristate "Kernel timer client (Testing client, use for debug)"
11 If you say yes here you get support for a PPS debugging client
12 which uses a kernel timer to generate the PPS signal.
14 This driver can also be built as a module. If so, the module
15 will be called pps-ktimer.
17 config PPS_CLIENT_LDISC
18 tristate "PPS line discipline"
21 If you say yes here you get support for a PPS source connected
22 with the CD (Carrier Detect) pin of your serial port.
24 config PPS_CLIENT_PARPORT
25 tristate "Parallel port PPS client"
28 If you say yes here you get support for a PPS source connected
29 with the interrupt pin of your parallel port.
31 config PPS_CLIENT_GPIO
32 tristate "PPS client using GPIO"
34 If you say yes here you get support for a PPS source using
35 GPIO. To be useful you must also register a platform device
36 specifying the GPIO pin and other options, usually in your board