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This patch adds the documentation for the ABI between the Linux kernel and userspace regarding the PPS generators. Signed-off-by: Rodolfo Giometti <giometti@enneenne.com> Link: https://lore.kernel.org/r/20241108073115.759039-5-giometti@enneenne.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
43 lines
1.4 KiB
Text
43 lines
1.4 KiB
Text
What: /sys/class/pps-gen/
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Date: February 2025
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KernelVersion: 6.13
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Contact: Rodolfo Giometti <giometti@enneenne.com>
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Description:
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The /sys/class/pps-gen/ directory contains files and
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directories that provide a unified interface to the PPS
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generators.
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What: /sys/class/pps-gen/pps-genX/
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Date: February 2025
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KernelVersion: 6.13
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Contact: Rodolfo Giometti <giometti@enneenne.com>
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Description:
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The /sys/class/pps-gen/pps-genX/ directory is related to X-th
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PPS generator in the system. Each directory contain files to
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manage and control its PPS generator.
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What: /sys/class/pps-gen/pps-genX/enable
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Date: February 2025
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KernelVersion: 6.13
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Contact: Rodolfo Giometti <giometti@enneenne.com>
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Description:
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This write-only file enables or disables generation of the
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PPS signal.
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What: /sys/class/pps-gen/pps-genX/system
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Date: February 2025
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KernelVersion: 6.13
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Contact: Rodolfo Giometti <giometti@enneenne.com>
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Description:
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This read-only file returns "1" if the generator takes the
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timing from the system clock, while it returns "0" if not
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(i.e. from a peripheral device clock).
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What: /sys/class/pps-gen/pps-genX/time
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Date: February 2025
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KernelVersion: 6.13
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Contact: Rodolfo Giometti <giometti@enneenne.com>
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Description:
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This read-only file contains the current time stored into the
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generator clock as two integers representing the current time
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seconds and nanoseconds.
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