diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
index ab7aad5a1e69..e9b86dbbb8fa 100644
--- a/drivers/watchdog/Kconfig
+++ b/drivers/watchdog/Kconfig
@@ -1686,7 +1686,7 @@ config WDT_MTX1
 config PNX833X_WDT
 	tristate "PNX833x Hardware Watchdog"
 	depends on SOC_PNX8335
-	depends on BROKEN
+	select WATCHDOG_CORE
 	help
 	  Hardware driver for the PNX833x's watchdog. This is a
 	  watchdog timer that will reboot the machine after a programmable
diff --git a/drivers/watchdog/pnx833x_wdt.c b/drivers/watchdog/pnx833x_wdt.c
index 4097d076aab8..4ec852c423da 100644
--- a/drivers/watchdog/pnx833x_wdt.c
+++ b/drivers/watchdog/pnx833x_wdt.c
@@ -17,21 +17,11 @@
 
 #include <linux/module.h>
 #include <linux/moduleparam.h>
-#include <linux/types.h>
-#include <linux/kernel.h>
-#include <linux/fs.h>
-#include <linux/mm.h>
-#include <linux/miscdevice.h>
 #include <linux/watchdog.h>
-#include <linux/notifier.h>
-#include <linux/reboot.h>
-#include <linux/init.h>
 #include <asm/mach-pnx833x/pnx833x.h>
 
-#define WATCHDOG_TIMEOUT 30		/* 30 sec Maximum timeout */
+#define WATCHDOG_DEFAULT_TIMEOUT 30
 #define WATCHDOG_COUNT_FREQUENCY 68000000U /* Watchdog counts at 68MHZ. */
-#define	PNX_WATCHDOG_TIMEOUT	(WATCHDOG_TIMEOUT * WATCHDOG_COUNT_FREQUENCY)
-#define PNX_TIMEOUT_VALUE	2040000000U
 
 /** CONFIG block */
 #define PNX833X_CONFIG                      (0x07000U)
@@ -43,40 +33,37 @@
 #define PNX833X_RESET                       (0x08000U)
 #define PNX833X_RESET_CONFIG                (0x08)
 
-static int pnx833x_wdt_alive;
+struct pnx833x_wdt {
+	struct watchdog_device wdd;
+};
 
-/* Set default timeout in MHZ.*/
-static int pnx833x_wdt_timeout = PNX_WATCHDOG_TIMEOUT;
+/* Set default timeout */
+static int pnx833x_wdt_timeout = WATCHDOG_DEFAULT_TIMEOUT;
 module_param(pnx833x_wdt_timeout, int, 0);
-MODULE_PARM_DESC(timeout, "Watchdog timeout in Mhz. (68Mhz clock), default="
-			__MODULE_STRING(PNX_TIMEOUT_VALUE) "(30 seconds).");
+MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds (default="
+		__MODULE_STRING(WATCHDOG_DEFAULT_TIMEOUT) ")");
 
 static bool nowayout = WATCHDOG_NOWAYOUT;
 module_param(nowayout, bool, 0);
 MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default="
 					__MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
 
-#define START_DEFAULT	1
-static int start_enabled = START_DEFAULT;
-module_param(start_enabled, int, 0);
-MODULE_PARM_DESC(start_enabled, "Watchdog is started on module insertion "
-				"(default=" __MODULE_STRING(START_DEFAULT) ")");
-
-static void pnx833x_wdt_start(void)
+static int pnx833x_wdt_start(struct watchdog_device *wdd)
 {
 	/* Enable watchdog causing reset. */
 	PNX833X_REG(PNX833X_RESET + PNX833X_RESET_CONFIG) |= 0x1;
 	/* Set timeout.*/
-	PNX833X_REG(PNX833X_CONFIG +
-		PNX833X_CONFIG_CPU_WATCHDOG_COMPARE) = pnx833x_wdt_timeout;
+	PNX833X_REG(PNX833X_CONFIG + PNX833X_CONFIG_CPU_WATCHDOG_COMPARE) =
+		wdd->timeout * WATCHDOG_COUNT_FREQUENCY;
 	/* Enable watchdog. */
 	PNX833X_REG(PNX833X_CONFIG +
 				PNX833X_CONFIG_CPU_COUNTERS_CONTROL) |= 0x1;
 
 	pr_info("Started watchdog timer\n");
+	return 0;
 }
 
-static void pnx833x_wdt_stop(void)
+static int pnx833x_wdt_stop(struct watchdog_device *wdd)
 {
 	/* Disable watchdog causing reset. */
 	PNX833X_REG(PNX833X_RESET + PNX833X_CONFIG) &= 0xFFFFFFFE;
@@ -85,149 +72,54 @@ static void pnx833x_wdt_stop(void)
 			PNX833X_CONFIG_CPU_COUNTERS_CONTROL) &= 0xFFFFFFFE;
 
 	pr_info("Stopped watchdog timer\n");
-}
-
-static void pnx833x_wdt_ping(void)
-{
-	PNX833X_REG(PNX833X_CONFIG +
-		PNX833X_CONFIG_CPU_WATCHDOG_COMPARE) = pnx833x_wdt_timeout;
-}
-
-/*
- *	Allow only one person to hold it open
- */
-static int pnx833x_wdt_open(struct inode *inode, struct file *file)
-{
-	if (test_and_set_bit(0, &pnx833x_wdt_alive))
-		return -EBUSY;
-
-	if (nowayout)
-		__module_get(THIS_MODULE);
-
-	/* Activate timer */
-	if (!start_enabled)
-		pnx833x_wdt_start();
-
-	pnx833x_wdt_ping();
-
-	pr_info("Started watchdog timer\n");
-
-	return stream_open(inode, file);
-}
-
-static int pnx833x_wdt_release(struct inode *inode, struct file *file)
-{
-	/* Shut off the timer.
-	 * Lock it in if it's a module and we defined ...NOWAYOUT */
-	if (!nowayout)
-		pnx833x_wdt_stop(); /* Turn the WDT off */
-
-	clear_bit(0, &pnx833x_wdt_alive);
 	return 0;
 }
 
-static ssize_t pnx833x_wdt_write(struct file *file, const char *data, size_t len, loff_t *ppos)
+static int pnx833x_wdt_ping(struct watchdog_device *wdd)
 {
-	/* Refresh the timer. */
-	if (len)
-		pnx833x_wdt_ping();
+	PNX833X_REG(PNX833X_CONFIG + PNX833X_CONFIG_CPU_WATCHDOG_COMPARE) =
+		wdd->timeout * WATCHDOG_COUNT_FREQUENCY;
 
-	return len;
+	return 0;
 }
 
-static long pnx833x_wdt_ioctl(struct file *file, unsigned int cmd,
-							unsigned long arg)
+static int pnx833x_wdt_set_timeout(struct watchdog_device *wdd, unsigned int t)
 {
-	int options, new_timeout = 0;
-	uint32_t timeout, timeout_left = 0;
-
-	static const struct watchdog_info ident = {
-		.options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT,
-		.firmware_version = 0,
-		.identity = "Hardware Watchdog for PNX833x",
-	};
-
-	switch (cmd) {
-	default:
-		return -ENOTTY;
-
-	case WDIOC_GETSUPPORT:
-		if (copy_to_user((struct watchdog_info *)arg,
-				 &ident, sizeof(ident)))
-			return -EFAULT;
-		return 0;
-
-	case WDIOC_GETSTATUS:
-	case WDIOC_GETBOOTSTATUS:
-		return put_user(0, (int *)arg);
-
-	case WDIOC_SETOPTIONS:
-		if (get_user(options, (int *)arg))
-			return -EFAULT;
-
-		if (options & WDIOS_DISABLECARD)
-			pnx833x_wdt_stop();
-
-		if (options & WDIOS_ENABLECARD)
-			pnx833x_wdt_start();
-
-		return 0;
-
-	case WDIOC_KEEPALIVE:
-		pnx833x_wdt_ping();
-		return 0;
-
-	case WDIOC_SETTIMEOUT:
-	{
-		if (get_user(new_timeout, (int *)arg))
-			return -EFAULT;
-
-		pnx833x_wdt_timeout = new_timeout;
-		PNX833X_REG(PNX833X_CONFIG +
-			PNX833X_CONFIG_CPU_WATCHDOG_COMPARE) = new_timeout;
-		return put_user(new_timeout, (int *)arg);
-	}
-
-	case WDIOC_GETTIMEOUT:
-		timeout = PNX833X_REG(PNX833X_CONFIG +
-					PNX833X_CONFIG_CPU_WATCHDOG_COMPARE);
-		return put_user(timeout, (int *)arg);
-
-	case WDIOC_GETTIMELEFT:
-		timeout_left = PNX833X_REG(PNX833X_CONFIG +
-						PNX833X_CONFIG_CPU_WATCHDOG);
-		return put_user(timeout_left, (int *)arg);
-
-	}
+	PNX833X_REG(PNX833X_CONFIG + PNX833X_CONFIG_CPU_WATCHDOG_COMPARE) =
+		t * WATCHDOG_COUNT_FREQUENCY;
+	wdd->timeout = t;
+	return 0;
 }
 
-static int pnx833x_wdt_notify_sys(struct notifier_block *this,
-					unsigned long code, void *unused)
+static unsigned int pnx833x_wdt_get_timeleft(struct watchdog_device *wdd)
 {
-	if (code == SYS_DOWN || code == SYS_HALT)
-		pnx833x_wdt_stop(); /* Turn the WDT off */
+	unsigned int timeout = PNX833X_REG(PNX833X_CONFIG +
+		 PNX833X_CONFIG_CPU_WATCHDOG_COMPARE);
+	unsigned int curval = PNX833X_REG(PNX833X_CONFIG +
+		PNX833X_CONFIG_CPU_WATCHDOG);
 
-	return NOTIFY_DONE;
+	return (timeout - curval) / WATCHDOG_COUNT_FREQUENCY;
 }
 
-static const struct file_operations pnx833x_wdt_fops = {
-	.owner		= THIS_MODULE,
-	.llseek		= no_llseek,
-	.write		= pnx833x_wdt_write,
-	.unlocked_ioctl	= pnx833x_wdt_ioctl,
-	.compat_ioctl	= compat_ptr_ioctl,
-	.open		= pnx833x_wdt_open,
-	.release	= pnx833x_wdt_release,
+static const struct watchdog_info pnx833x_wdt_ident = {
+	.identity = "PNX833x Watchdog Timer",
+	.options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE
 };
 
-static struct miscdevice pnx833x_wdt_miscdev = {
-	.minor		= WATCHDOG_MINOR,
-	.name		= "watchdog",
-	.fops		= &pnx833x_wdt_fops,
+static struct watchdog_ops pnx833x_wdt_ops = {
+	.owner = THIS_MODULE,
+	.start = pnx833x_wdt_start,
+	.stop = pnx833x_wdt_stop,
+	.ping = pnx833x_wdt_ping,
+	.set_timeout = pnx833x_wdt_set_timeout,
+	.get_timeleft = pnx833x_wdt_get_timeleft,
 };
 
-static struct notifier_block pnx833x_wdt_notifier = {
-	.notifier_call = pnx833x_wdt_notify_sys,
+struct pnx833x_wdt pnx833x_wdd = {
+	.wdd = {
+		.info = &pnx833x_wdt_ident,
+		.ops = &pnx833x_wdt_ops,
+	},
 };
 
 static int __init watchdog_init(void)
@@ -237,36 +129,29 @@ static int __init watchdog_init(void)
 	/* Lets check the reason for the reset.*/
 	cause = PNX833X_REG(PNX833X_RESET);
 	/*If bit 31 is set then watchdog was cause of reset.*/
-	if (cause & 0x80000000) {
+	if (cause & 0x80000000)
 		pr_info("The system was previously reset due to the watchdog firing - please investigate...\n");
-	}
 
-	ret = register_reboot_notifier(&pnx833x_wdt_notifier);
-	if (ret) {
-		pr_err("cannot register reboot notifier (err=%d)\n", ret);
-		return ret;
-	}
+	pnx833x_wdd.wdd.max_timeout = U32_MAX / WATCHDOG_COUNT_FREQUENCY;
+	pnx833x_wdd.wdd.timeout = pnx833x_wdt_timeout;
+	if (pnx833x_wdd.wdd.timeout > pnx833x_wdd.wdd.max_timeout)
+		pnx833x_wdd.wdd.timeout = pnx833x_wdd.wdd.max_timeout;
 
-	ret = misc_register(&pnx833x_wdt_miscdev);
+	watchdog_set_nowayout(&pnx833x_wdd.wdd, nowayout);
+	ret = watchdog_register_device(&pnx833x_wdd.wdd);
 	if (ret) {
-		pr_err("cannot register miscdev on minor=%d (err=%d)\n",
-		       WATCHDOG_MINOR, ret);
-		unregister_reboot_notifier(&pnx833x_wdt_notifier);
+		pr_err("Failed to register watchdog device");
 		return ret;
 	}
 
 	pr_info("Hardware Watchdog Timer for PNX833x: Version 0.1\n");
 
-	if (start_enabled)
-		pnx833x_wdt_start();
-
 	return 0;
 }
 
 static void __exit watchdog_exit(void)
 {
-	misc_deregister(&pnx833x_wdt_miscdev);
-	unregister_reboot_notifier(&pnx833x_wdt_notifier);
+	watchdog_unregister_device(&pnx833x_wdd.wdd);
 }
 
 module_init(watchdog_init);
