linux-imx

/*

 * drivers/char/watchdog/pnx4008_wdt.c

 *

 * Watchdog driver for PNX4008 board

 *

 * Authors: Dmitry Chigirev <source@mvista.com>,

 *      Vitaly Wool <vitalywool@gmail.com>

 * Based on sa1100 driver,

 * Copyright (C) 2000 Oleg Drokin <green@crimea.edu>

 *

 * 2005-2006 (c) MontaVista Software, Inc.

 *

 * (C) 2012 Wolfram Sang, Pengutronix

 *

 * This file is licensed under the terms of the GNU General Public License

 * version 2. This program is licensed "as is" without any warranty of any

 * kind, whether express or implied.

 */

​

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

​

#include <linux/module.h>

#include <linux/moduleparam.h>

#include <linux/types.h>

#include <linux/kernel.h>

#include <linux/watchdog.h>

#include <linux/platform_device.h>

#include <linux/clk.h>

#include <linux/spinlock.h>

#include <linux/io.h>

#include <linux/slab.h>

#include <linux/err.h>

#include <linux/of.h>

#include <linux/delay.h>

#include <linux/reboot.h>

#include <mach/hardware.h>

​

/* WatchDog Timer - Chapter 23 Page 207 */

​

#define DEFAULT_HEARTBEAT 19

#define MAX_HEARTBEAT     60

​

/* Watchdog timer register set definition */

#define WDTIM_INT(p)     ((p) + 0x0)

#define WDTIM_CTRL(p)    ((p) + 0x4)

#define WDTIM_COUNTER(p) ((p) + 0x8)

#define WDTIM_MCTRL(p)   ((p) + 0xC)

#define WDTIM_MATCH0(p)  ((p) + 0x10)

#define WDTIM_EMR(p)     ((p) + 0x14)

#define WDTIM_PULSE(p)   ((p) + 0x18)

#define WDTIM_RES(p)     ((p) + 0x1C)

​

/* WDTIM_INT bit definitions */

#define MATCH_INT      1

​

/* WDTIM_CTRL bit definitions */

#define COUNT_ENAB     1

#define RESET_COUNT    (1 << 1)

#define DEBUG_EN       (1 << 2)

​

/* WDTIM_MCTRL bit definitions */

#define MR0_INT        1

#undef  RESET_COUNT0