linux-imx

/*

 *      Intel_SCU 0.2:  An Intel SCU IOH Based Watchdog Device

 *          for Intel part #(s):

 *              - AF82MP20 PCH

 *

 *      Copyright (C) 2009-2010 Intel Corporation. All rights reserved.

 *

 *      This program is free software; you can redistribute it and/or

 *      modify it under the terms of version 2 of the GNU General

 *      Public License as published by the Free Software Foundation.

 *

 *      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., 59 Temple Place - Suite 330,

 *      Boston, MA  02111-1307, USA.

 *      The full GNU General Public License is included in this

 *      distribution in the file called COPYING.

 *

 */

​

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

​

#include <linux/compiler.h>

#include <linux/module.h>

#include <linux/kernel.h>

#include <linux/moduleparam.h>

#include <linux/types.h>

#include <linux/miscdevice.h>

#include <linux/watchdog.h>

#include <linux/fs.h>

#include <linux/notifier.h>

#include <linux/reboot.h>

#include <linux/init.h>

#include <linux/jiffies.h>

#include <linux/uaccess.h>

#include <linux/slab.h>

#include <linux/io.h>

#include <linux/interrupt.h>

#include <linux/delay.h>

#include <linux/sched.h>

#include <linux/signal.h>

#include <linux/sfi.h>

#include <asm/irq.h>

#include <linux/atomic.h>

#include <asm/intel_scu_ipc.h>

#include <asm/apb_timer.h>

#include <asm/intel-mid.h>

​

#include "intel_scu_watchdog.h"

​

/* Bounds number of times we will retry loading time count */

/* This retry is a work around for a silicon bug.      */

#define MAX_RETRY 16

​

#define IPC_SET_WATCHDOG_TIMER  0xF8

​

static int timer_margin = DEFAULT_SOFT_TO_HARD_MARGIN;

module_param(timer_margin, int, 0);

MODULE_PARM_DESC(timer_margin,