Orange Pi5 kernel

// 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");