// 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_dbg(&pps->dev, "ktimer PPS source unregistered\n"); 	timer_delete_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_dbg(&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");