linux/drivers/pps/clients/pps-ktimer.c
Thomas Gleixner 74ba9207e1 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61
Based on 1 normalized pattern(s):

  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

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 441 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc)
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190520071858.739733335@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-24 17:36:45 +02:00

88 lines
1.7 KiB
C

// SPDX-License-Identifier: GPL-2.0-or-later
/*
* pps-ktimer.c -- kernel timer test client
*
* Copyright (C) 2005-2006 Rodolfo Giometti <giometti@linux.it>
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/time.h>
#include <linux/timer.h>
#include <linux/pps_kernel.h>
/*
* Global variables
*/
static struct pps_device *pps;
static struct timer_list ktimer;
/*
* The kernel timer
*/
static void pps_ktimer_event(struct timer_list *unused)
{
struct pps_event_time ts;
/* First of all we get the time stamp... */
pps_get_ts(&ts);
pps_event(pps, &ts, PPS_CAPTUREASSERT, NULL);
mod_timer(&ktimer, jiffies + HZ);
}
/*
* The PPS info struct
*/
static struct pps_source_info pps_ktimer_info = {
.name = "ktimer",
.path = "",
.mode = PPS_CAPTUREASSERT | PPS_OFFSETASSERT |
PPS_ECHOASSERT |
PPS_CANWAIT | PPS_TSFMT_TSPEC,
.owner = THIS_MODULE,
};
/*
* Module staff
*/
static void __exit pps_ktimer_exit(void)
{
dev_info(pps->dev, "ktimer PPS source unregistered\n");
del_timer_sync(&ktimer);
pps_unregister_source(pps);
}
static int __init pps_ktimer_init(void)
{
pps = pps_register_source(&pps_ktimer_info,
PPS_CAPTUREASSERT | PPS_OFFSETASSERT);
if (IS_ERR(pps)) {
pr_err("cannot register PPS source\n");
return PTR_ERR(pps);
}
timer_setup(&ktimer, pps_ktimer_event, 0);
mod_timer(&ktimer, jiffies + HZ);
dev_info(pps->dev, "ktimer PPS source registered\n");
return 0;
}
module_init(pps_ktimer_init);
module_exit(pps_ktimer_exit);
MODULE_AUTHOR("Rodolfo Giometti <giometti@linux.it>");
MODULE_DESCRIPTION("dummy PPS source by using a kernel timer (just for debug)");
MODULE_LICENSE("GPL");