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45 lines
1.3 KiB
45 lines
1.3 KiB
# SPDX-License-Identifier: GPL-2.0-only |
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# |
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# PPS support configuration |
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# |
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menuconfig PPS |
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tristate "PPS support" |
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help |
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PPS (Pulse Per Second) is a special pulse provided by some GPS |
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antennae. Userland can use it to get a high-precision time |
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reference. |
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Some antennae's PPS signals are connected with the CD (Carrier |
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Detect) pin of the serial line they use to communicate with the |
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host. In this case use the SERIAL_LINE client support. |
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Some antennae's PPS signals are connected with some special host |
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inputs so you have to enable the corresponding client support. |
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To compile this driver as a module, choose M here: the module |
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will be called pps_core.ko. |
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if PPS |
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config PPS_DEBUG |
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bool "PPS debugging messages" |
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help |
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Say Y here if you want the PPS support to produce a bunch of debug |
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messages to the system log. Select this if you are having a |
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problem with PPS support and want to see more of what is going on. |
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config NTP_PPS |
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bool "PPS kernel consumer support" |
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depends on !NO_HZ_COMMON |
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help |
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This option adds support for direct in-kernel time |
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synchronization using an external PPS signal. |
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It doesn't work on tickless systems at the moment. |
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source "drivers/pps/clients/Kconfig" |
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source "drivers/pps/generators/Kconfig" |
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endif # PPS
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