mirror of
https://github.com/torvalds/linux.git
synced 2024-11-24 05:02:12 +00:00
74ba9207e1
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>
88 lines
1.7 KiB
C
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");
|