| 1 | /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
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| 2 | /* |
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| 3 | * PPS generator API header |
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| 4 | * |
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| 5 | * Copyright (C) 2024 Rodolfo Giometti <giometti@enneenne.com> |
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| 6 | */ |
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| 7 | |
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| 8 | #ifndef _PPS_GEN_H_ |
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| 9 | #define _PPS_GEN_H_ |
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| 10 | |
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| 11 | #include <linux/types.h> |
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| 12 | #include <linux/ioctl.h> |
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| 13 | |
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| 14 | /** |
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| 15 | * struct pps_gen_event - the PPS generator events |
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| 16 | * @event: the event type |
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| 17 | * @sequence: the event sequence number |
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| 18 | * |
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| 19 | * Userspace can get the last PPS generator event by using the |
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| 20 | * ioctl(pps_gen, PPS_GEN_FETCHEVENT, ...) syscall. |
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| 21 | * The sequence field can be used to save the last event ID, while in the |
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| 22 | * event field is stored the last event type. Currently known event is: |
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| 23 | * |
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| 24 | * PPS_GEN_EVENT_MISSEDPULSE : last pulse was not generated |
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| 25 | */ |
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| 26 | struct pps_gen_event { |
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| 27 | unsigned int event; |
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| 28 | unsigned int sequence; |
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| 29 | }; |
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| 30 | |
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| 31 | #define PPS_GEN_EVENT_MISSEDPULSE 1 |
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| 32 | |
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| 33 | #define PPS_GEN_SETENABLE _IOW('p', 0xb1, unsigned int *) |
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| 34 | #define PPS_GEN_USESYSTEMCLOCK _IOR('p', 0xb2, unsigned int *) |
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| 35 | #define PPS_GEN_FETCHEVENT _IOR('p', 0xb3, struct pps_gen_event *) |
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| 36 | |
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| 37 | #endif /* _PPS_GEN_H_ */ |
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| 38 | |
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