| Server IP : 127.0.1.1 / Your IP : 216.73.216.152 Web Server : Apache/2.4.52 (Ubuntu) System : Linux bahcrestlinepropertiesllc 5.15.0-113-generic #123-Ubuntu SMP Mon Jun 10 08:16:17 UTC 2024 x86_64 User : www-data ( 33) PHP Version : 7.4.33 Disable Function : pcntl_alarm,pcntl_fork,pcntl_waitpid,pcntl_wait,pcntl_wifexited,pcntl_wifstopped,pcntl_wifsignaled,pcntl_wifcontinued,pcntl_wexitstatus,pcntl_wtermsig,pcntl_wstopsig,pcntl_signal,pcntl_signal_get_handler,pcntl_signal_dispatch,pcntl_get_last_error,pcntl_strerror,pcntl_sigprocmask,pcntl_sigwaitinfo,pcntl_sigtimedwait,pcntl_exec,pcntl_getpriority,pcntl_setpriority,pcntl_async_signals,pcntl_unshare, MySQL : OFF | cURL : ON | WGET : ON | Perl : ON | Python : OFF | Sudo : ON | Pkexec : ON Directory : /proc/2792866/root/usr/src/linux-headers-5.15.0-161/include/linux/ |
Upload File : |
/* 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 */
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)
{
struct system_time_snapshot snap;
ktime_get_snapshot(&snap);
ts->ts_real = ktime_to_timespec64(snap.real);
#ifdef CONFIG_NTP_PPS
ts->ts_raw = ktime_to_timespec64(snap.raw);
#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 */