/* * 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(unsigned long ptr){	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;	} 	setup_timer(&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");