linux/drivers/ptp/ptp_chardev.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * PTP 1588 clock support - character device implementation.
 *
 * Copyright (C) 2010 OMICRON electronics GmbH
 */
#include <linux/module.h>
#include <linux/posix-clock.h>
#include <linux/poll.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/timekeeping.h>
#include <linux/debugfs.h>

#include <linux/nospec.h>

#include "ptp_private.h"

static int ptp_disable_pinfunc(struct ptp_clock_info *ops,
			       enum ptp_pin_function func, unsigned int chan)
{ … }

int ptp_set_pinfunc(struct ptp_clock *ptp, unsigned int pin,
		    enum ptp_pin_function func, unsigned int chan)
{ … }

int ptp_open(struct posix_clock_context *pccontext, fmode_t fmode)
{ … }

int ptp_release(struct posix_clock_context *pccontext)
{ … }

long ptp_ioctl(struct posix_clock_context *pccontext, unsigned int cmd,
	       unsigned long arg)
{ … }

__poll_t ptp_poll(struct posix_clock_context *pccontext, struct file *fp,
		  poll_table *wait)
{ … }

#define EXTTS_BUFSIZE …

ssize_t ptp_read(struct posix_clock_context *pccontext, uint rdflags,
		 char __user *buf, size_t cnt)
{ … }