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/*
* posix-clock.h - support for dynamic clock devices
*
* Copyright (C) 2010 OMICRON electronics GmbH
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef _LINUX_POSIX_CLOCK_H_
#define _LINUX_POSIX_CLOCK_H_
#include <linux/cdev.h>
#include <linux/fs.h>
#include <linux/poll.h>
#include <linux/posix-timers.h>
#include <linux/rwsem.h>
struct posix_clock;
struct posix_clock_operations {
struct module *owner;
int (*clock_adjtime)(struct posix_clock *pc, struct timex *tx);
int (*clock_gettime)(struct posix_clock *pc, struct timespec *ts);
int (*clock_getres) (struct posix_clock *pc, struct timespec *ts);
int (*clock_settime)(struct posix_clock *pc,
const struct timespec *ts);
int (*timer_create) (struct posix_clock *pc, struct k_itimer *kit);
int (*timer_delete) (struct posix_clock *pc, struct k_itimer *kit);
void (*timer_gettime)(struct posix_clock *pc,
struct k_itimer *kit, struct itimerspec *tsp);
int (*timer_settime)(struct posix_clock *pc,
struct k_itimer *kit, int flags,
struct itimerspec *tsp, struct itimerspec *old);
int (*fasync) (struct posix_clock *pc,
int fd, struct file *file, int on);
long (*ioctl) (struct posix_clock *pc,
unsigned int cmd, unsigned long arg);
int (*mmap) (struct posix_clock *pc,
struct vm_area_struct *vma);
int (*open) (struct posix_clock *pc, fmode_t f_mode);
uint (*poll) (struct posix_clock *pc,
struct file *file, poll_table *wait);
int (*release) (struct posix_clock *pc);
ssize_t (*read) (struct posix_clock *pc,
uint flags, char __user *buf, size_t cnt);
};
struct posix_clock {
struct posix_clock_operations ops;
struct cdev cdev;
struct kref kref;
struct rw_semaphore rwsem;
bool zombie;
void (*release)(struct posix_clock *clk);
};
int posix_clock_register(struct posix_clock *clk, dev_t devid);
void posix_clock_unregister(struct posix_clock *clk);
#endif
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