162306a36Sopenharmony_ci# SPDX-License-Identifier: GPL-2.0-only 262306a36Sopenharmony_ci# 362306a36Sopenharmony_ci# PPS clients configuration 462306a36Sopenharmony_ci# 562306a36Sopenharmony_ci 662306a36Sopenharmony_cicomment "PPS clients support" 762306a36Sopenharmony_ci 862306a36Sopenharmony_ciconfig PPS_CLIENT_KTIMER 962306a36Sopenharmony_ci tristate "Kernel timer client (Testing client, use for debug)" 1062306a36Sopenharmony_ci help 1162306a36Sopenharmony_ci If you say yes here you get support for a PPS debugging client 1262306a36Sopenharmony_ci which uses a kernel timer to generate the PPS signal. 1362306a36Sopenharmony_ci 1462306a36Sopenharmony_ci This driver can also be built as a module. If so, the module 1562306a36Sopenharmony_ci will be called pps-ktimer. 1662306a36Sopenharmony_ci 1762306a36Sopenharmony_ciconfig PPS_CLIENT_LDISC 1862306a36Sopenharmony_ci tristate "PPS line discipline" 1962306a36Sopenharmony_ci depends on TTY 2062306a36Sopenharmony_ci help 2162306a36Sopenharmony_ci If you say yes here you get support for a PPS source connected 2262306a36Sopenharmony_ci with the CD (Carrier Detect) pin of your serial port. 2362306a36Sopenharmony_ci 2462306a36Sopenharmony_ciconfig PPS_CLIENT_PARPORT 2562306a36Sopenharmony_ci tristate "Parallel port PPS client" 2662306a36Sopenharmony_ci depends on PARPORT 2762306a36Sopenharmony_ci help 2862306a36Sopenharmony_ci If you say yes here you get support for a PPS source connected 2962306a36Sopenharmony_ci with the interrupt pin of your parallel port. 3062306a36Sopenharmony_ci 3162306a36Sopenharmony_ciconfig PPS_CLIENT_GPIO 3262306a36Sopenharmony_ci tristate "PPS client using GPIO" 3362306a36Sopenharmony_ci help 3462306a36Sopenharmony_ci If you say yes here you get support for a PPS source using 3562306a36Sopenharmony_ci GPIO. To be useful you must also register a platform device 3662306a36Sopenharmony_ci specifying the GPIO pin and other options, usually in your board 3762306a36Sopenharmony_ci setup. 38