| 1 | # SPDX-License-Identifier: GPL-2.0-only |
| 2 | # |
| 3 | # PPS clients configuration |
| 4 | # |
| 5 | |
| 6 | comment "PPS clients support" |
| 7 | |
| 8 | config PPS_CLIENT_KTIMER |
| 9 | tristate "Kernel timer client (Testing client, use for debug)" |
| 10 | help |
| 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. |
| 13 | |
| 14 | This driver can also be built as a module. If so, the module |
| 15 | will be called pps-ktimer. |
| 16 | |
| 17 | config PPS_CLIENT_LDISC |
| 18 | tristate "PPS line discipline" |
| 19 | depends on TTY |
| 20 | help |
| 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. |
| 23 | |
| 24 | config PPS_CLIENT_PARPORT |
| 25 | tristate "Parallel port PPS client" |
| 26 | depends on PARPORT |
| 27 | help |
| 28 | If you say yes here you get support for a PPS source connected |
| 29 | with the interrupt pin of your parallel port. |
| 30 | |
| 31 | config PPS_CLIENT_GPIO |
| 32 | tristate "PPS client using GPIO" |
| 33 | help |
| 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 |
| 37 | setup. |