/*
|
* pps-ktimer.c -- kernel timer test client
|
*
|
*
|
* Copyright (C) 2005-2006 Rodolfo Giometti <giometti@linux.it>
|
*
|
* 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.
|
*/
|
|
#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 (pps == NULL) {
|
pr_err("cannot register PPS source\n");
|
return -ENOMEM;
|
}
|
|
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");
|
