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/*
* Simple softlockup watchdog regression test module
*
* Copyright (C) 2012 Motorola Mobility LLC.
*
* 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; version 2
* of the License.
*/
#include <linux/completion.h>
#include <linux/workqueue.h>
#include <linux/irq.h>
#include <linux/preempt.h>
#include <linux/module.h>
#include <linux/debugfs.h>
#include <mach/mmi_watchdog.h>
struct completion wdt_timeout_complete;
static void wdt_timeout_work(struct work_struct *work)
{
local_irq_disable();
while (1) { }
local_irq_enable();
complete(&wdt_timeout_complete);
}
static DECLARE_WORK(wdt_timeout_work_struct, wdt_timeout_work);
static int fire_watchdog_reset_set(void *data, u64 val)
{
init_completion(&wdt_timeout_complete);
printk(KERN_WARNING "Fire hardware watchdog reset.\n");
printk(KERN_WARNING "Please wait ...\n");
schedule_work_on(0, &wdt_timeout_work_struct);
wait_for_completion(&wdt_timeout_complete);
return 0;
}
DEFINE_SIMPLE_ATTRIBUTE(fire_watchdog_reset_fops,
NULL, fire_watchdog_reset_set, "%llu\n");
static int fire_softlockup_reset_set(void *data, u64 val)
{
touch_hw_watchdog();
printk(KERN_WARNING "Fire softlockup watchdog reset.\n");
printk(KERN_WARNING "Please wait ...\n");
preempt_disable();
while (1) { }
return 0;
}
DEFINE_SIMPLE_ATTRIBUTE(fire_softlockup_reset_fops,
NULL, fire_softlockup_reset_set, "%llu\n");
static int watchdog_test_init(void)
{
debugfs_create_file("fire_softlockup_reset", 0200,
NULL, NULL, &fire_softlockup_reset_fops);
debugfs_create_file("fire_watchdog_reset", 0200,
NULL, NULL, &fire_watchdog_reset_fops);
return 0;
}
static void watchdog_test_exit(void)
{
}
module_init(watchdog_test_init);
module_exit(watchdog_test_exit);
MODULE_LICENSE("GPL");
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