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linux-yocto/drivers/pps/clients/Kconfig
Thomas Gleixner ec8f24b7fa treewide: Add SPDX license identifier - Makefile/Kconfig 
Add SPDX license identifiers to all Make/Kconfig files which:

 - Have no license information of any form

These files fall under the project license, GPL v2 only. The resulting SPDX
license identifier is:

  GPL-2.0-only

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-21 10:50:46 +02:00

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SPDX-License-Identifier: GPL-2.0-only

PPS clients configuration

comment "PPS clients support"

config PPS_CLIENT_KTIMER tristate "Kernel timer client (Testing client, use for debug)" help If you say yes here you get support for a PPS debugging client which uses a kernel timer to generate the PPS signal.

  This driver can also be built as a module.  If so, the module
  will be called pps-ktimer.

config PPS_CLIENT_LDISC tristate "PPS line discipline" depends on TTY help If you say yes here you get support for a PPS source connected with the CD (Carrier Detect) pin of your serial port.

config PPS_CLIENT_PARPORT tristate "Parallel port PPS client" depends on PARPORT help If you say yes here you get support for a PPS source connected with the interrupt pin of your parallel port.

config PPS_CLIENT_GPIO tristate "PPS client using GPIO" help If you say yes here you get support for a PPS source using GPIO. To be useful you must also register a platform device specifying the GPIO pin and other options, usually in your board setup.