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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123/* SPDX-License-Identifier: GPL-2.0-or-later *//* * PPS API kernel header * * Copyright (C) 2009 Rodolfo Giometti <giometti@linux.it> */
#ifndef LINUX_PPS_KERNEL_H#define LINUX_PPS_KERNEL_H
#include <linux/pps.h>#include <linux/cdev.h>#include <linux/device.h>#include <linux/time.h>
/* * Global defines */
struct pps_device;
/* The specific PPS source info */struct pps_source_info { char name[PPS_MAX_NAME_LEN]; /* symbolic name */ char path[PPS_MAX_NAME_LEN]; /* path of connected device */ int mode; /* PPS allowed mode */
void (*echo)(struct pps_device *pps, int event, void *data); /* PPS echo function */
struct module *owner; struct device *dev; /* Parent device for device_create */};
struct pps_event_time {#ifdef CONFIG_NTP_PPS struct timespec64 ts_raw;#endif /* CONFIG_NTP_PPS */ struct timespec64 ts_real;};
/* The main struct */struct pps_device { struct pps_source_info info; /* PSS source info */
struct pps_kparams params; /* PPS current params */
__u32 assert_sequence; /* PPS assert event seq # */ __u32 clear_sequence; /* PPS clear event seq # */ struct pps_ktime assert_tu; struct pps_ktime clear_tu; int current_mode; /* PPS mode at event time */
unsigned int last_ev; /* last PPS event id */ unsigned int last_fetched_ev; /* last fetched PPS event id */ wait_queue_head_t queue; /* PPS event queue */
unsigned int id; /* PPS source unique ID */ void const *lookup_cookie; /* For pps_lookup_dev() only */ struct device dev; struct fasync_struct *async_queue; /* fasync method */ spinlock_t lock;};
/* * Global variables */
extern const struct attribute_group *pps_groups[];
/* * Internal functions. * * These are not actually part of the exported API, but this is a * convenient header file to put them in. */
extern int pps_register_cdev(struct pps_device *pps);extern void pps_unregister_cdev(struct pps_device *pps);
/* * Exported functions */
extern struct pps_device *pps_register_source( struct pps_source_info *info, int default_params);extern void pps_unregister_source(struct pps_device *pps);extern void pps_event(struct pps_device *pps, struct pps_event_time *ts, int event, void *data);/* Look up a pps_device by magic cookie */struct pps_device *pps_lookup_dev(void const *cookie);
static inline void timespec_to_pps_ktime(struct pps_ktime *kt, struct timespec64 ts){ kt->sec = ts.tv_sec; kt->nsec = ts.tv_nsec;}
static inline void pps_get_ts(struct pps_event_time *ts){#ifdef CONFIG_NTP_PPS struct system_time_snapshot snap;
ktime_get_snapshot_id(CLOCK_REALTIME, &snap); ts->ts_real = ktime_to_timespec64(snap.systime); ts->ts_raw = ktime_to_timespec64(snap.monoraw);#else ktime_get_real_ts64(&ts->ts_real);#endif}
/* Subtract known time delay from PPS event time(s) */static inline void pps_sub_ts(struct pps_event_time *ts, struct timespec64 delta){ ts->ts_real = timespec64_sub(ts->ts_real, delta);#ifdef CONFIG_NTP_PPS ts->ts_raw = timespec64_sub(ts->ts_raw, delta);#endif}
#endif /* LINUX_PPS_KERNEL_H */