Merge git://www.linux-watchdog.org/linux-watchdog

* git://www.linux-watchdog.org/linux-watchdog:
  watchdog: Convert wm831x driver to watchdog core
  watchdog: s3c2410: convert to use the watchdog framework
  Documentation: watchdog: add guide how to convert drivers to new framework
  watchdog: iTCO_wdt.c - problems with newer hardware due to SMI clearing
  watchdog: Add WDIOC_GETTIMELEFT ioctl support to w83627 watchdog driver
  watchdog: irq: Remove IRQF_DISABLED
  watchdog: Octeon: Mark octeon_wdt interrupt as IRQF_NO_THREAD
  watchdog: sc520_wdt: Remove unnecessary cast.

Documentation/watchdog/convert_drivers_to_kernel_api.txt

+Converting old watchdog drivers to the watchdog framework
+by Wolfram Sang <w.sang@pengutronix.de>
+=========================================================
+
+Before the watchdog framework came into the kernel, every driver had to
+implement the API on its own. Now, as the framework factored out the common
+components, those drivers can be lightened making it a user of the framework.
+This document shall guide you for this task. The necessary steps are described
+as well as things to look out for.
+
+
+Remove the file_operations struct
+---------------------------------
+
+Old drivers define their own file_operations for actions like open(), write(),
+etc... These are now handled by the framework and just call the driver when
+needed. So, in general, the 'file_operations' struct and assorted functions can
+go. Only very few driver-specific details have to be moved to other functions.
+Here is a overview of the functions and probably needed actions:
+
+- open: Everything dealing with resource management (file-open checks, magic
+  close preparations) can simply go. Device specific stuff needs to go to the
+  driver specific start-function. Note that for some drivers, the start-function
+  also serves as the ping-function. If that is the case and you need start/stop
+  to be balanced (clocks!), you are better off refactoring a separate start-function.
+
+- close: Same hints as for open apply.
+
+- write: Can simply go, all defined behaviour is taken care of by the framework,
+  i.e. ping on write and magic char ('V') handling.
+
+- ioctl: While the driver is allowed to have extensions to the IOCTL interface,
+  the most common ones are handled by the framework, supported by some assistance
+  from the driver:
+
+	WDIOC_GETSUPPORT:
+		Returns the mandatory watchdog_info struct from the driver
+
+	WDIOC_GETSTATUS:
+		Needs the status-callback defined, otherwise returns 0
+
+	WDIOC_GETBOOTSTATUS:
+		Needs the bootstatus member properly set. Make sure it is 0 if you
+		don't have further support!
+
+	WDIOC_SETOPTIONS:
+		No preparations needed
+
+	WDIOC_KEEPALIVE:
+		If wanted, options in watchdog_info need to have WDIOF_KEEPALIVEPING
+		set
+
+	WDIOC_SETTIMEOUT:
+		Options in watchdog_info need to have WDIOF_SETTIMEOUT set
+		and a set_timeout-callback has to be defined. The core will also
+		do limit-checking, if min_timeout and max_timeout in the watchdog
+		device are set. All is optional.
+
+	WDIOC_GETTIMEOUT:
+		No preparations needed
+
+  Other IOCTLs can be served using the ioctl-callback. Note that this is mainly
+  intended for porting old drivers; new drivers should not invent private IOCTLs.
+  Private IOCTLs are processed first. When the callback returns with
+  -ENOIOCTLCMD, the IOCTLs of the framework will be tried, too. Any other error
+  is directly given to the user.
+
+Example conversion:
+
+-static const struct file_operations s3c2410wdt_fops = {
+-       .owner          = THIS_MODULE,
+-       .llseek         = no_llseek,
+-       .write          = s3c2410wdt_write,
+-       .unlocked_ioctl = s3c2410wdt_ioctl,
+-       .open           = s3c2410wdt_open,
+-       .release        = s3c2410wdt_release,
+-};
+
+Check the functions for device-specific stuff and keep it for later
+refactoring. The rest can go.
+
+
+Remove the miscdevice
+---------------------
+
+Since the file_operations are gone now, you can also remove the 'struct
+miscdevice'. The framework will create it on watchdog_dev_register() called by
+watchdog_register_device().
+
+-static struct miscdevice s3c2410wdt_miscdev = {
+-       .minor          = WATCHDOG_MINOR,
+-       .name           = "watchdog",
+-       .fops           = &s3c2410wdt_fops,
+-};
+
+
+Remove obsolete includes and defines
+------------------------------------
+
+Because of the simplifications, a few defines are probably unused now. Remove
+them. Includes can be removed, too. For example:
+
+- #include <linux/fs.h>
+- #include <linux/miscdevice.h> (if MODULE_ALIAS_MISCDEV is not used)
+- #include <linux/uaccess.h> (if no custom IOCTLs are used)
+
+
+Add the watchdog operations
+---------------------------
+
+All possible callbacks are defined in 'struct watchdog_ops'. You can find it
+explained in 'watchdog-kernel-api.txt' in this directory. start(), stop() and
+owner must be set, the rest are optional. You will easily find corresponding
+functions in the old driver. Note that you will now get a pointer to the
+watchdog_device as a parameter to these functions, so you probably have to
+change the function header. Other changes are most likely not needed, because
+here simply happens the direct hardware access. If you have device-specific
+code left from the above steps, it should be refactored into these callbacks.
+
+Here is a simple example:
+
++static struct watchdog_ops s3c2410wdt_ops = {
++       .owner = THIS_MODULE,
++       .start = s3c2410wdt_start,
++       .stop = s3c2410wdt_stop,
++       .ping = s3c2410wdt_keepalive,
++       .set_timeout = s3c2410wdt_set_heartbeat,
++};
+
+A typical function-header change looks like:
+
+-static void s3c2410wdt_keepalive(void)
++static int s3c2410wdt_keepalive(struct watchdog_device *wdd)
+ {
+...
++
++       return 0;
+ }
+
+...
+
+-       s3c2410wdt_keepalive();
++       s3c2410wdt_keepalive(&s3c2410_wdd);
+
+
+Add the watchdog device
+-----------------------
+
+Now we need to create a 'struct watchdog_device' and populate it with the
+necessary information for the framework. The struct is also explained in detail
+in 'watchdog-kernel-api.txt' in this directory. We pass it the mandatory
+watchdog_info struct and the newly created watchdog_ops. Often, old drivers
+have their own record-keeping for things like bootstatus and timeout using
+static variables. Those have to be converted to use the members in
+watchdog_device. Note that the timeout values are unsigned int. Some drivers
+use signed int, so this has to be converted, too.
+
+Here is a simple example for a watchdog device:
+
++static struct watchdog_device s3c2410_wdd = {
++       .info = &s3c2410_wdt_ident,
++       .ops = &s3c2410wdt_ops,
++};
+
+
+Register the watchdog device
+----------------------------
+
+Replace misc_register(&miscdev) with watchdog_register_device(&watchdog_dev).
+Make sure the return value gets checked and the error message, if present,
+still fits. Also convert the unregister case.
+
+-       ret = misc_register(&s3c2410wdt_miscdev);
++       ret = watchdog_register_device(&s3c2410_wdd);
+
+...
+
+-       misc_deregister(&s3c2410wdt_miscdev);
++       watchdog_unregister_device(&s3c2410_wdd);
+
+
+Update the Kconfig-entry
+------------------------
+
+The entry for the driver now needs to select WATCHDOG_CORE:
+
++       select WATCHDOG_CORE
+
+
+Create a patch and send it to upstream
+--------------------------------------
+
+Make sure you understood Documentation/SubmittingPatches and send your patch to
+linux-watchdog@vger.kernel.org. We are looking forward to it :)
+

drivers/watchdog/Kconfig

@@ -66,6 +66,7 @@ config SOFT_WATCHDOG
 config WM831X_WATCHDOG
 	tristate "WM831x watchdog"
 	depends on MFD_WM831X
+	select WATCHDOG_CORE
 	help
 	  Support for the watchdog in the WM831x AudioPlus PMICs.  When
 	  the watchdog triggers the system will be reset.
@@ -170,6 +171,7 @@ config HAVE_S3C2410_WATCHDOG
 config S3C2410_WATCHDOG
 	tristate "S3C2410 Watchdog"
 	depends on ARCH_S3C2410 || HAVE_S3C2410_WATCHDOG
+	select WATCHDOG_CORE
 	help
 	  Watchdog timer block in the Samsung SoCs. This will reboot
 	  the system when the timer expires with the watchdog enabled.

drivers/watchdog/coh901327_wdt.c

@@ -429,7 +429,7 @@ static int __init coh901327_probe(struct platform_device *pdev)
 	writew(U300_WDOG_SR_RESET_STATUS_RESET, virtbase + U300_WDOG_SR);
 
 	irq = platform_get_irq(pdev, 0);
-	if (request_irq(irq, coh901327_interrupt, IRQF_DISABLED,
+	if (request_irq(irq, coh901327_interrupt, 0,
 			DRV_NAME " Bark", pdev)) {
 		ret = -EIO;
 		goto out_no_irq;

drivers/watchdog/eurotechwdt.c

@@ -427,7 +427,7 @@ static int __init eurwdt_init(void)
 {
 	int ret;
 
-	ret = request_irq(irq, eurwdt_interrupt, IRQF_DISABLED, "eurwdt", NULL);
+	ret = request_irq(irq, eurwdt_interrupt, 0, "eurwdt", NULL);
 	if (ret) {
 		printk(KERN_ERR "eurwdt: IRQ %d is not free.\n", irq);
 		goto out;

drivers/watchdog/iTCO_wdt.c

 /*
  *	intel TCO Watchdog Driver
  *
- *	(c) Copyright 2006-2010 Wim Van Sebroeck <wim@iguana.be>.
+ *	(c) Copyright 2006-2011 Wim Van Sebroeck <wim@iguana.be>.
  *
  *	This program is free software; you can redistribute it and/or
  *	modify it under the terms of the GNU General Public License
@@ -44,7 +44,7 @@
 
 /* Module and version information */
 #define DRV_NAME	"iTCO_wdt"
-#define DRV_VERSION	"1.06"
+#define DRV_VERSION	"1.07"
 #define PFX		DRV_NAME ": "
 
 /* Includes */
@@ -384,6 +384,11 @@ MODULE_PARM_DESC(nowayout,
 	"Watchdog cannot be stopped once started (default="
 				__MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
 
+static int turn_SMI_watchdog_clear_off = 0;
+module_param(turn_SMI_watchdog_clear_off, int, 0);
+MODULE_PARM_DESC(turn_SMI_watchdog_clear_off,
+	"Turn off SMI clearing watchdog (default=0)");
+
 /*
  * Some TCO specific functions
  */
@@ -808,10 +813,12 @@ static int __devinit iTCO_wdt_init(struct pci_dev *pdev,
 		ret = -EIO;
 		goto out_unmap;
 	}
-	/* Bit 13: TCO_EN -> 0 = Disables TCO logic generating an SMI# */
-	val32 = inl(SMI_EN);
-	val32 &= 0xffffdfff;	/* Turn off SMI clearing watchdog */
-	outl(val32, SMI_EN);
+	if (turn_SMI_watchdog_clear_off) {
+		/* Bit 13: TCO_EN -> 0 = Disables TCO logic generating an SMI# */
+		val32 = inl(SMI_EN);
+		val32 &= 0xffffdfff;	/* Turn off SMI clearing watchdog */
+		outl(val32, SMI_EN);
+	}
 
 	/* The TCO I/O registers reside in a 32-byte range pointed to
 	   by the TCOBASE value */

drivers/watchdog/mpcore_wdt.c

@@ -367,8 +367,7 @@ static int __devinit mpcore_wdt_probe(struct platform_device *dev)
 		goto err_misc;
 	}
 
-	ret = request_irq(wdt->irq, mpcore_wdt_fire, IRQF_DISABLED,
-							"mpcore_wdt", wdt);
+	ret = request_irq(wdt->irq, mpcore_wdt_fire, 0, "mpcore_wdt", wdt);
 	if (ret) {
 		dev_printk(KERN_ERR, wdt->dev,
 			"cannot register IRQ%d for watchdog\n", wdt->irq);

drivers/watchdog/octeon-wdt-main.c

@@ -402,7 +402,7 @@ static void octeon_wdt_setup_interrupt(int cpu)
 	irq = OCTEON_IRQ_WDOG0 + core;
 
 	if (request_irq(irq, octeon_wdt_poke_irq,
-			IRQF_DISABLED, "octeon_wdt", octeon_wdt_poke_irq))
+			IRQF_NO_THREAD, "octeon_wdt", octeon_wdt_poke_irq))
 		panic("octeon_wdt: Couldn't obtain irq %d", irq);
 
 	cpumask_set_cpu(cpu, &irq_enabled_cpus);

drivers/watchdog/s3c2410_wdt.c

@@ -27,9 +27,8 @@
 #include <linux/moduleparam.h>
 #include <linux/types.h>
 #include <linux/timer.h>
-#include <linux/miscdevice.h>
+#include <linux/miscdevice.h> /* for MODULE_ALIAS_MISCDEV */
 #include <linux/watchdog.h>
-#include <linux/fs.h>
 #include <linux/init.h>
 #include <linux/platform_device.h>
 #include <linux/interrupt.h>
@@ -38,6 +37,7 @@
 #include <linux/io.h>
 #include <linux/cpufreq.h>
 #include <linux/slab.h>
+#include <linux/err.h>
 
 #include <mach/map.h>
 
@@ -74,14 +74,12 @@ MODULE_PARM_DESC(soft_noboot, "Watchdog action, set to 1 to ignore reboots, "
 			"0 to reboot (default 0)");
 MODULE_PARM_DESC(debug, "Watchdog debug, set to >1 for debug (default 0)");
 
-static unsigned long open_lock;
 static struct device    *wdt_dev;	/* platform device attached to */
 static struct resource	*wdt_mem;
 static struct resource	*wdt_irq;
 static struct clk	*wdt_clock;
 static void __iomem	*wdt_base;
 static unsigned int	 wdt_count;
-static char		 expect_close;
 static DEFINE_SPINLOCK(wdt_lock);
 
 /* watchdog control routines */
@@ -93,11 +91,13 @@ static DEFINE_SPINLOCK(wdt_lock);
 
 /* functions */
 
-static void s3c2410wdt_keepalive(void)
+static int s3c2410wdt_keepalive(struct watchdog_device *wdd)
 {
 	spin_lock(&wdt_lock);
 	writel(wdt_count, wdt_base + S3C2410_WTCNT);
 	spin_unlock(&wdt_lock);
+
+	return 0;
 }
 
 static void __s3c2410wdt_stop(void)
@@ -109,14 +109,16 @@ static void __s3c2410wdt_stop(void)
 	writel(wtcon, wdt_base + S3C2410_WTCON);
 }
 
-static void s3c2410wdt_stop(void)
+static int s3c2410wdt_stop(struct watchdog_device *wdd)
 {
 	spin_lock(&wdt_lock);
 	__s3c2410wdt_stop();
 	spin_unlock(&wdt_lock);
+
+	return 0;
 }
 
-static void s3c2410wdt_start(void)
+static int s3c2410wdt_start(struct watchdog_device *wdd)
 {
 	unsigned long wtcon;
 
@@ -142,6 +144,8 @@ static void s3c2410wdt_start(void)
 	writel(wdt_count, wdt_base + S3C2410_WTCNT);
 	writel(wtcon, wdt_base + S3C2410_WTCON);
 	spin_unlock(&wdt_lock);
+
+	return 0;
 }
 
 static inline int s3c2410wdt_is_running(void)
@@ -149,7 +153,7 @@ static inline int s3c2410wdt_is_running(void)
 	return readl(wdt_base + S3C2410_WTCON) & S3C2410_WTCON_ENABLE;
 }
 
-static int s3c2410wdt_set_heartbeat(int timeout)
+static int s3c2410wdt_set_heartbeat(struct watchdog_device *wdd, unsigned timeout)
 {
 	unsigned long freq = clk_get_rate(wdt_clock);
 	unsigned int count;
@@ -182,8 +186,6 @@ static int s3c2410wdt_set_heartbeat(int timeout)
 		}
 	}
 
-	tmr_margin = timeout;
-
 	DBG("%s: timeout=%d, divisor=%d, count=%d (%08x)\n",
 	    __func__, timeout, divisor, count, count/divisor);
 
@@ -201,70 +203,6 @@ static int s3c2410wdt_set_heartbeat(int timeout)
 	return 0;
 }
 
-/*
- *	/dev/watchdog handling
- */
-
-static int s3c2410wdt_open(struct inode *inode, struct file *file)
-{
-	if (test_and_set_bit(0, &open_lock))
-		return -EBUSY;
-
-	if (nowayout)
-		__module_get(THIS_MODULE);
-
-	expect_close = 0;
-
-	/* start the timer */
-	s3c2410wdt_start();
-	return nonseekable_open(inode, file);
-}
-
-static int s3c2410wdt_release(struct inode *inode, struct file *file)
-{
-	/*
-	 *	Shut off the timer.
-	 *	Lock it in if it's a module and we set nowayout
-	 */
-
-	if (expect_close == 42)
-		s3c2410wdt_stop();
-	else {
-		dev_err(wdt_dev, "Unexpected close, not stopping watchdog\n");
-		s3c2410wdt_keepalive();
-	}
-	expect_close = 0;
-	clear_bit(0, &open_lock);
-	return 0;
-}
-
-static ssize_t s3c2410wdt_write(struct file *file, const char __user *data,
-				size_t len, loff_t *ppos)
-{
-	/*
-	 *	Refresh the timer.
-	 */
-	if (len) {
-		if (!nowayout) {
-			size_t i;
-
-			/* In case it was set long ago */
-			expect_close = 0;
-
-			for (i = 0; i != len; i++) {
-				char c;
-
-				if (get_user(c, data + i))
-					return -EFAULT;
-				if (c == 'V')
-					expect_close = 42;
-			}
-		}
-		s3c2410wdt_keepalive();
-	}
-	return len;
-}
-
 #define OPTIONS (WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE)
 
 static const struct watchdog_info s3c2410_wdt_ident = {
@@ -273,53 +211,17 @@ static const struct watchdog_info s3c2410_wdt_ident = {
 	.identity         =	"S3C2410 Watchdog",
 };
 
-
-static long s3c2410wdt_ioctl(struct file *file,	unsigned int cmd,
-							unsigned long arg)
-{
-	void __user *argp = (void __user *)arg;
-	int __user *p = argp;
-	int new_margin;
-
-	switch (cmd) {
-	case WDIOC_GETSUPPORT:
-		return copy_to_user(argp, &s3c2410_wdt_ident,
-			sizeof(s3c2410_wdt_ident)) ? -EFAULT : 0;
-	case WDIOC_GETSTATUS:
-	case WDIOC_GETBOOTSTATUS:
-		return put_user(0, p);
-	case WDIOC_KEEPALIVE:
-		s3c2410wdt_keepalive();
-		return 0;
-	case WDIOC_SETTIMEOUT:
-		if (get_user(new_margin, p))
-			return -EFAULT;
-		if (s3c2410wdt_set_heartbeat(new_margin))
-			return -EINVAL;
-		s3c2410wdt_keepalive();
-		return put_user(tmr_margin, p);
-	case WDIOC_GETTIMEOUT:
-		return put_user(tmr_margin, p);
-	default:
-		return -ENOTTY;
-	}
-}
-
-/* kernel interface */
-
-static const struct file_operations s3c2410wdt_fops = {
-	.owner		= THIS_MODULE,
-	.llseek		= no_llseek,
-	.write		= s3c2410wdt_write,
-	.unlocked_ioctl	= s3c2410wdt_ioctl,
-	.open		= s3c2410wdt_open,
-	.release	= s3c2410wdt_release,
+static struct watchdog_ops s3c2410wdt_ops = {
+	.owner = THIS_MODULE,
+	.start = s3c2410wdt_start,
+	.stop = s3c2410wdt_stop,
+	.ping = s3c2410wdt_keepalive,
+	.set_timeout = s3c2410wdt_set_heartbeat,
 };
 
-static struct miscdevice s3c2410wdt_miscdev = {
-	.minor		= WATCHDOG_MINOR,
-	.name		= "watchdog",
-	.fops		= &s3c2410wdt_fops,
+static struct watchdog_device s3c2410_wdd = {
+	.info = &s3c2410_wdt_ident,
+	.ops = &s3c2410wdt_ops,
 };
 
 /* interrupt handler code */
@@ -328,7 +230,7 @@ static irqreturn_t s3c2410wdt_irq(int irqno, void *param)
 {
 	dev_info(wdt_dev, "watchdog timer expired (irq)\n");
 
-	s3c2410wdt_keepalive();
+	s3c2410wdt_keepalive(&s3c2410_wdd);
 	return IRQ_HANDLED;
 }
 
@@ -349,14 +251,14 @@ static int s3c2410wdt_cpufreq_transition(struct notifier_block *nb,
 		 * the watchdog is running.
 		 */
 
-		s3c2410wdt_keepalive();
+		s3c2410wdt_keepalive(&s3c2410_wdd);
 	} else if (val == CPUFREQ_POSTCHANGE) {
-		s3c2410wdt_stop();
+		s3c2410wdt_stop(&s3c2410_wdd);
 
-		ret = s3c2410wdt_set_heartbeat(tmr_margin);
+		ret = s3c2410wdt_set_heartbeat(&s3c2410_wdd, s3c2410_wdd.timeout);
 
 		if (ret >= 0)
-			s3c2410wdt_start();
+			s3c2410wdt_start(&s3c2410_wdd);
 		else
 			goto err;
 	}
@@ -365,7 +267,8 @@ static int s3c2410wdt_cpufreq_transition(struct notifier_block *nb,
 	return 0;
 
  err:
-	dev_err(wdt_dev, "cannot set new value for timeout %d\n", tmr_margin);
+	dev_err(wdt_dev, "cannot set new value for timeout %d\n",
+				s3c2410_wdd.timeout);
 	return ret;
 }
 
@@ -396,10 +299,6 @@ static inline void s3c2410wdt_cpufreq_deregister(void)
 }
 #endif
 
-
-
-/* device interface */
-
 static int __devinit s3c2410wdt_probe(struct platform_device *pdev)
 {
 	struct device *dev;
@@ -466,8 +365,8 @@ static int __devinit s3c2410wdt_probe(struct platform_device *pdev)
 	/* see if we can actually set the requested timer margin, and if
 	 * not, try the default value */
 
-	if (s3c2410wdt_set_heartbeat(tmr_margin)) {
-		started = s3c2410wdt_set_heartbeat(
+	if (s3c2410wdt_set_heartbeat(&s3c2410_wdd, tmr_margin)) {
+		started = s3c2410wdt_set_heartbeat(&s3c2410_wdd,
 					CONFIG_S3C2410_WATCHDOG_DEFAULT_TIME);
 
 		if (started == 0)
@@ -479,22 +378,21 @@ static int __devinit s3c2410wdt_probe(struct platform_device *pdev)
 							"cannot start\n");
 	}
 
-	ret = misc_register(&s3c2410wdt_miscdev);
+	ret = watchdog_register_device(&s3c2410_wdd);
 	if (ret) {
-		dev_err(dev, "cannot register miscdev on minor=%d (%d)\n",
-			WATCHDOG_MINOR, ret);
+		dev_err(dev, "cannot register watchdog (%d)\n", ret);
 		goto err_cpufreq;
 	}
 
 	if (tmr_atboot && started == 0) {
 		dev_info(dev, "starting watchdog timer\n");
-		s3c2410wdt_start();
+		s3c2410wdt_start(&s3c2410_wdd);
 	} else if (!tmr_atboot) {
 		/* if we're not enabling the watchdog, then ensure it is
 		 * disabled if it has been left running from the bootloader
 		 * or other source */
 
-		s3c2410wdt_stop();
+		s3c2410wdt_stop(&s3c2410_wdd);
 	}
 
 	/* print out a statement of readiness */
@@ -530,7 +428,7 @@ static int __devinit s3c2410wdt_probe(struct platform_device *pdev)
 
 static int __devexit s3c2410wdt_remove(struct platform_device *dev)
 {
-	misc_deregister(&s3c2410wdt_miscdev);
+	watchdog_unregister_device(&s3c2410_wdd);
 
 	s3c2410wdt_cpufreq_deregister();
 
@@ -550,7 +448,7 @@ static int __devexit s3c2410wdt_remove(struct platform_device *dev)
 
 static void s3c2410wdt_shutdown(struct platform_device *dev)
 {
-	s3c2410wdt_stop();
+	s3c2410wdt_stop(&s3c2410_wdd);
 }
 
 #ifdef CONFIG_PM
@@ -565,7 +463,7 @@ static int s3c2410wdt_suspend(struct platform_device *dev, pm_message_t state)
 	wtdat_save = readl(wdt_base + S3C2410_WTDAT);
 
 	/* Note that WTCNT doesn't need to be saved. */
-	s3c2410wdt_stop();
+	s3c2410wdt_stop(&s3c2410_wdd);
 
 	return 0;
 }

drivers/watchdog/sb_wdog.c

@@ -300,7 +300,7 @@ static int __init sbwdog_init(void)
 	 * get the resources
 	 */
 
-	ret = request_irq(1, sbwdog_interrupt, IRQF_DISABLED | IRQF_SHARED,
+	ret = request_irq(1, sbwdog_interrupt, IRQF_SHARED,
 		ident.identity, (void *)user_dog);
 	if (ret) {
 		printk(KERN_ERR "%s: failed to request irq 1 - %d\n",
@@ -350,7 +350,7 @@ void platform_wd_setup(void)
 {
 	int ret;
 
-	ret = request_irq(1, sbwdog_interrupt, IRQF_DISABLED | IRQF_SHARED,
+	ret = request_irq(1, sbwdog_interrupt, IRQF_SHARED,
 		"Kernel Watchdog", IOADDR(A_SCD_WDOG_CFG_0));
 	if (ret) {
 		printk(KERN_CRIT

drivers/watchdog/sc520_wdt.c

@@ -398,7 +398,7 @@ static int __init sc520_wdt_init(void)
 							WATCHDOG_TIMEOUT);
 	}
 
-	wdtmrctl = ioremap((unsigned long)(MMCR_BASE + OFFS_WDTMRCTL), 2);
+	wdtmrctl = ioremap(MMCR_BASE + OFFS_WDTMRCTL, 2);
 	if (!wdtmrctl) {
 		printk(KERN_ERR PFX "Unable to remap memory\n");
 		rc = -ENOMEM;

drivers/watchdog/w83627hf_wdt.c

@@ -142,7 +142,7 @@ static void w83627hf_init(void)
 	w83627hf_unselect_wd_register();
 }
 
-static void wdt_ctrl(int timeout)
+static void wdt_set_time(int timeout)
 {
 	spin_lock(&io_lock);
 
@@ -158,13 +158,13 @@ static void wdt_ctrl(int timeout)
 
 static int wdt_ping(void)
 {
-	wdt_ctrl(timeout);
+	wdt_set_time(timeout);
 	return 0;
 }
 
 static int wdt_disable(void)
 {
-	wdt_ctrl(0);
+	wdt_set_time(0);
 	return 0;
 }
 
@@ -176,6 +176,24 @@ static int wdt_set_heartbeat(int t)
 	return 0;
 }
 
+static int wdt_get_time(void)
+{
+	int timeleft;
+
+	spin_lock(&io_lock);
+
+	w83627hf_select_wd_register();
+
+	outb_p(0xF6, WDT_EFER);    /* Select CRF6 */
+	timeleft = inb_p(WDT_EFDR); /* Read Timeout counter to CRF6 */
+
+	w83627hf_unselect_wd_register();
+
+	spin_unlock(&io_lock);
+
+	return timeleft;
+}
+
 static ssize_t wdt_write(struct file *file, const char __user *buf,
 						size_t count, loff_t *ppos)
 {
@@ -202,7 +220,7 @@ static long wdt_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 {
 	void __user *argp = (void __user *)arg;
 	int __user *p = argp;
-	int new_timeout;
+	int timeval;
 	static const struct watchdog_info ident = {
 		.options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT |
 							WDIOF_MAGICCLOSE,
@@ -238,14 +256,17 @@ static long wdt_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 		wdt_ping();
 		break;
 	case WDIOC_SETTIMEOUT:
-		if (get_user(new_timeout, p))
+		if (get_user(timeval, p))
 			return -EFAULT;
-		if (wdt_set_heartbeat(new_timeout))
+		if (wdt_set_heartbeat(timeval))
 			return -EINVAL;
 		wdt_ping();
 		/* Fall */
 	case WDIOC_GETTIMEOUT:
 		return put_user(timeout, p);
+	case WDIOC_GETTIMELEFT:
+		timeval = wdt_get_time();
+		return put_user(timeval, p);
 	default:
 		return -ENOTTY;
 	}

drivers/watchdog/wdt.c

@@ -612,7 +612,7 @@ static int __init wdt_init(void)
 		goto out;
 	}
 
-	ret = request_irq(irq, wdt_interrupt, IRQF_DISABLED, "wdt501p", NULL);
+	ret = request_irq(irq, wdt_interrupt, 0, "wdt501p", NULL);
 	if (ret) {
 		printk(KERN_ERR "wdt: IRQ %d is not free.\n", irq);
 		goto outreg;

drivers/watchdog/wdt_pci.c

@@ -643,7 +643,7 @@ static int __devinit wdtpci_init_one(struct pci_dev *dev,
 	irq = dev->irq;
 	io = pci_resource_start(dev, 2);
 
-	if (request_irq(irq, wdtpci_interrupt, IRQF_DISABLED | IRQF_SHARED,
+	if (request_irq(irq, wdtpci_interrupt, IRQF_SHARED,
 			 "wdt_pci", &wdtpci_miscdev)) {
 		printk(KERN_ERR PFX "IRQ %d is not free\n", irq);
 		goto out_reg;