Merge git://git.kernel.org/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog

* git://git.kernel.org/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog: (28 commits)
  [WATCHDOG] Fix pcwd_init_module crash
  [WATCHDOG] ICH9 support for iTCO_wdt
  [WATCHDOG] 631xESB/632xESB support for iTCO_wdt - add all LPC bridges
  [WATCHDOG] 631xESB/632xESB support for iTCO_wdt
  [WATCHDOG] omap_wdt.c - default error for IOCTL is -ENOTTY
  [WATCHDOG] Return value of nonseekable_open
  [WATCHDOG] mv64x60_wdt: Rework the timeout register manipulation
  [WATCHDOG] mv64x60_wdt: disable watchdog timer when driver is probed
  [WATCHDOG] mv64x60_wdt: Support the WDIOF_MAGICCLOSE feature
  [WATCHDOG] mv64x60_wdt: Add a module parameter to change nowayout setting
  [WATCHDOG] mv64x60_wdt: Add WDIOC_SETOPTIONS ioctl support
  [WATCHDOG] mv64x60_wdt: Support for WDIOC_SETTIMEOUT ioctl
  [WATCHDOG] mv64x60_wdt: Fix WDIOC_GETTIMEOUT return value
  [WATCHDOG] mv64x60_wdt: Check return value of nonseekable_open
  [WATCHDOG] mv64x60_wdt: Add arch/powerpc platform support
  [WATCHDOG] mv64x60_wdt: Get register address from platform data
  [WATCHDOG] mv64x60_wdt: set up platform_device in platform code
  [WATCHDOG] ensure mouse and keyboard ignored in w83627hf_wdt
  [WATCHDOG] s3c2410_wdt: fixup after arch include moves
  [WATCHDOG] git-watchdog-typo
  ...

23 files changed, 1394 insertions, 148 deletions

diff --git a/drivers/Makefile b/drivers/Makefile
index a9e4c5f922a..f0878b2ec55 100644
--- a/drivers/Makefile
+++ b/drivers/Makefile
@@ -66,6 +66,7 @@ obj-y				+= i2c/
 obj-$(CONFIG_W1)		+= w1/
 obj-$(CONFIG_POWER_SUPPLY)	+= power/
 obj-$(CONFIG_HWMON)		+= hwmon/
+obj-$(CONFIG_WATCHDOG)		+= char/watchdog/
 obj-$(CONFIG_PHONE)		+= telephony/
 obj-$(CONFIG_MD)		+= md/
 obj-$(CONFIG_BT)		+= bluetooth/
diff --git a/drivers/char/Makefile b/drivers/char/Makefile
index 23b26b87cc3..d68ddbe70f7 100644
--- a/drivers/char/Makefile
+++ b/drivers/char/Makefile
@@ -97,7 +97,6 @@ obj-$(CONFIG_GPIO_VR41XX)	+= vr41xx_giu.o
 obj-$(CONFIG_GPIO_TB0219)	+= tb0219.o
 obj-$(CONFIG_TELCLOCK)		+= tlclk.o
 
-obj-$(CONFIG_WATCHDOG)		+= watchdog/
 obj-$(CONFIG_MWAVE)		+= mwave/
 obj-$(CONFIG_AGP)		+= agp/
 obj-$(CONFIG_DRM)		+= drm/
diff --git a/drivers/char/watchdog/Kconfig b/drivers/char/watchdog/Kconfig
index 16fb23125e9..37bddc1802d 100644
--- a/drivers/char/watchdog/Kconfig
+++ b/drivers/char/watchdog/Kconfig
@@ -55,6 +55,8 @@ config SOFT_WATCHDOG
 	  To compile this driver as a module, choose M here: the
 	  module will be called softdog.
 
+# ALPHA Architecture
+
 # ARM Architecture
 
 config AT91RM9200_WATCHDOG
@@ -189,7 +191,7 @@ config PNX4008_WATCHDOG
 
 config IOP_WATCHDOG
 	tristate "IOP Watchdog"
-	depends on WATCHDOG && PLAT_IOP
+	depends on PLAT_IOP
 	select WATCHDOG_NOWAYOUT if (ARCH_IOP32X || ARCH_IOP33X)
 	help
 	  Say Y here if to include support for the watchdog timer
@@ -203,15 +205,48 @@ config IOP_WATCHDOG
 	  operating as an Root Complex and/or Central Resource, the PCI-X
 	  and/or PCIe busses will also be reset.  THIS IS A VERY BIG HAMMER.
 
+config DAVINCI_WATCHDOG
+	tristate "DaVinci watchdog"
+	depends on ARCH_DAVINCI
+	help
+	  Say Y here if to include support for the watchdog timer
+	  in the DaVinci DM644x/DM646x processors.
+	  To compile this driver as a module, choose M here: the
+	  module will be called davinci_wdt.
+
+	  NOTE: once enabled, this timer cannot be disabled.
+	  Say N if you are unsure.
+
+# ARM26 Architecture
+
 # AVR32 Architecture
 
 config AT32AP700X_WDT
 	tristate "AT32AP700x watchdog"
-	depends on WATCHDOG && CPU_AT32AP7000
+	depends on CPU_AT32AP7000
 	help
 	  Watchdog timer embedded into AT32AP700x devices. This will reboot
 	  your system when the timeout is reached.
 
+# BLACKFIN Architecture
+
+config BFIN_WDT
+	tristate "Blackfin On-Chip Watchdog Timer"
+	depends on BLACKFIN
+	---help---
+	  If you say yes here you will get support for the Blackfin On-Chip
+	  Watchdog Timer. If you have one of these processors and wish to
+	  have watchdog support enabled, say Y, otherwise say N.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called bfin_wdt.
+
+# CRIS Architecture
+
+# FRV Architecture
+
+# H8300 Architecture
+
 # X86 (i386 + ia64 + x86_64) Architecture
 
 config ACQUIRE_WDT
@@ -540,37 +575,11 @@ config SBC_EPX_C3_WATCHDOG
 	  To compile this driver as a module, choose M here: the
 	  module will be called sbc_epx_c3.
 
-# PowerPC Architecture
+# M32R Architecture
 
-config 8xx_WDT
-	tristate "MPC8xx Watchdog Timer"
-	depends on 8xx
+# M68K Architecture
 
-config 83xx_WDT
-	tristate "MPC83xx Watchdog Timer"
-	depends on PPC_83xx
-
-config MV64X60_WDT
-	tristate "MV64X60 (Marvell Discovery) Watchdog Timer"
-	depends on MV64X60
-
-config BOOKE_WDT
-	bool "PowerPC Book-E Watchdog Timer"
-	depends on BOOKE || 4xx
-	---help---
-	  Please see Documentation/watchdog/watchdog-api.txt for
-	  more information.
-
-# PPC64 Architecture
-
-config WATCHDOG_RTAS
-	tristate "RTAS watchdog"
-	depends on PPC_RTAS
-	help
-	  This driver adds watchdog support for the RTAS watchdog.
-
-	  To compile this driver as a module, choose M here. The module
-	  will be called wdrtas.
+# M68KNOMMU Architecture
 
 # MIPS Architecture
 
@@ -600,6 +609,44 @@ config WDT_RM9K_GPI
 	  To compile this driver as a module, choose M here: the
 	  module will be called rm9k_wdt.
 
+# PARISC Architecture
+
+# POWERPC Architecture
+
+config MPC5200_WDT
+	tristate "MPC5200 Watchdog Timer"
+	depends on PPC_MPC52xx
+
+config 8xx_WDT
+	tristate "MPC8xx Watchdog Timer"
+	depends on 8xx
+
+config 83xx_WDT
+	tristate "MPC83xx Watchdog Timer"
+	depends on PPC_83xx
+
+config MV64X60_WDT
+	tristate "MV64X60 (Marvell Discovery) Watchdog Timer"
+	depends on MV64X60
+
+config BOOKE_WDT
+	bool "PowerPC Book-E Watchdog Timer"
+	depends on BOOKE || 4xx
+	---help---
+	  Please see Documentation/watchdog/watchdog-api.txt for
+	  more information.
+
+# PPC64 Architecture
+
+config WATCHDOG_RTAS
+	tristate "RTAS watchdog"
+	depends on PPC_RTAS
+	help
+	  This driver adds watchdog support for the RTAS watchdog.
+
+	  To compile this driver as a module, choose M here. The module
+	  will be called wdrtas.
+
 # S390 Architecture
 
 config ZVM_WATCHDOG
@@ -614,7 +661,7 @@ config ZVM_WATCHDOG
 	  To compile this driver as a module, choose M here. The module
 	  will be called vmwatchdog.
 
-# SUPERH Architecture
+# SUPERH (sh + sh64) Architecture
 
 config SH_WDT
 	tristate "SuperH Watchdog"
@@ -641,6 +688,8 @@ config SH_WDT_MMAP
 	  If you say Y here, user applications will be able to mmap the
 	  WDT/CPG registers.
 
+# SPARC Architecture
+
 # SPARC64 Architecture
 
 config WATCHDOG_CP1XXX
@@ -665,6 +714,10 @@ config WATCHDOG_RIO
 	  machines.  The watchdog timeout period is normally one minute but
 	  can be changed with a boot-time parameter.
 
+# V850 Architecture
+
+# XTENSA Architecture
+
 #
 # ISA-based Watchdog Cards
 #
diff --git a/drivers/char/watchdog/Makefile b/drivers/char/watchdog/Makefile
index bdb9d5e3bb4..389f8b14ccc 100644
--- a/drivers/char/watchdog/Makefile
+++ b/drivers/char/watchdog/Makefile
@@ -22,6 +22,8 @@ obj-$(CONFIG_WDTPCI) += wdt_pci.o
 # USB-based Watchdog Cards
 obj-$(CONFIG_USBPCWATCHDOG) += pcwd_usb.o
 
+# ALPHA Architecture
+
 # ARM Architecture
 obj-$(CONFIG_AT91RM9200_WATCHDOG) += at91rm9200_wdt.o
 obj-$(CONFIG_OMAP_WATCHDOG) += omap_wdt.o
@@ -36,10 +38,22 @@ obj-$(CONFIG_MPCORE_WATCHDOG) += mpcore_wdt.o
 obj-$(CONFIG_EP93XX_WATCHDOG) += ep93xx_wdt.o
 obj-$(CONFIG_PNX4008_WATCHDOG) += pnx4008_wdt.o
 obj-$(CONFIG_IOP_WATCHDOG) += iop_wdt.o
+obj-$(CONFIG_DAVINCI_WATCHDOG) += davinci_wdt.o
+
+# ARM26 Architecture
 
 # AVR32 Architecture
 obj-$(CONFIG_AT32AP700X_WDT) += at32ap700x_wdt.o
 
+# BLACKFIN Architecture
+obj-$(CONFIG_BFIN_WDT) += bfin_wdt.o
+
+# CRIS Architecture
+
+# FRV Architecture
+
+# H8300 Architecture
+
 # X86 (i386 + ia64 + x86_64) Architecture
 obj-$(CONFIG_ACQUIRE_WDT) += acquirewdt.o
 obj-$(CONFIG_ADVANTECH_WDT) += advantechwdt.o
@@ -66,8 +80,22 @@ obj-$(CONFIG_W83977F_WDT) += w83977f_wdt.o
 obj-$(CONFIG_MACHZ_WDT) += machzwd.o
 obj-$(CONFIG_SBC_EPX_C3_WATCHDOG) += sbc_epx_c3.o
 
-# PowerPC Architecture
+# M32R Architecture
+
+# M68K Architecture
+
+# M68KNOMMU Architecture
+
+# MIPS Architecture
+obj-$(CONFIG_INDYDOG) += indydog.o
+obj-$(CONFIG_WDT_MTX1)	+= mtx-1_wdt.o
+obj-$(CONFIG_WDT_RM9K_GPI) += rm9k_wdt.o
+
+# PARISC Architecture
+
+# POWERPC Architecture
 obj-$(CONFIG_8xx_WDT) += mpc8xx_wdt.o
+obj-$(CONFIG_MPC5200_WDT) += mpc5200_wdt.o
 obj-$(CONFIG_83xx_WDT) += mpc83xx_wdt.o
 obj-$(CONFIG_MV64X60_WDT) += mv64x60_wdt.o
 obj-$(CONFIG_BOOKE_WDT) += booke_wdt.o
@@ -75,17 +103,18 @@ obj-$(CONFIG_BOOKE_WDT) += booke_wdt.o
 # PPC64 Architecture
 obj-$(CONFIG_WATCHDOG_RTAS) += wdrtas.o
 
-# MIPS Architecture
-obj-$(CONFIG_INDYDOG) += indydog.o
-obj-$(CONFIG_WDT_MTX1)	+= mtx-1_wdt.o
-obj-$(CONFIG_WDT_RM9K_GPI) += rm9k_wdt.o
-
 # S390 Architecture
 
-# SUPERH Architecture
+# SUPERH (sh + sh64) Architecture
 obj-$(CONFIG_SH_WDT) += shwdt.o
 
+# SPARC Architecture
+
 # SPARC64 Architecture
 
+# V850 Architecture
+
+# XTENSA Architecture
+
 # Architecture Independant
 obj-$(CONFIG_SOFT_WATCHDOG) += softdog.o
diff --git a/drivers/char/watchdog/bfin_wdt.c b/drivers/char/watchdog/bfin_wdt.c
new file mode 100644
index 00000000000..309d27913fc
--- /dev/null
+++ b/drivers/char/watchdog/bfin_wdt.c
@@ -0,0 +1,490 @@
+/*
+ * Blackfin On-Chip Watchdog Driver
+ *  Supports BF53[123]/BF53[467]/BF54[2489]/BF561
+ *
+ * Originally based on softdog.c
+ * Copyright 2006-2007 Analog Devices Inc.
+ * Copyright 2006-2007 Michele d'Amico
+ * Copyright 1996 Alan Cox <alan@redhat.com>
+ *
+ * Enter bugs at http://blackfin.uclinux.org/
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#include <linux/platform_device.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/types.h>
+#include <linux/timer.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/interrupt.h>
+#include <asm/blackfin.h>
+#include <asm/uaccess.h>
+
+#define stamp(fmt, args...) pr_debug("%s:%i: " fmt "\n", __func__, __LINE__, ## args)
+#define stampit() stamp("here i am")
+
+#define WATCHDOG_NAME "bfin-wdt"
+#define PFX WATCHDOG_NAME ": "
+
+/* The BF561 has two watchdogs (one per core), but since Linux
+ * only runs on core A, we'll just work with that one.
+ */
+#ifdef BF561_FAMILY
+# define bfin_read_WDOG_CTL()    bfin_read_WDOGA_CTL()
+# define bfin_read_WDOG_CNT()    bfin_read_WDOGA_CNT()
+# define bfin_read_WDOG_STAT()   bfin_read_WDOGA_STAT()
+# define bfin_write_WDOG_CTL(x)  bfin_write_WDOGA_CTL(x)
+# define bfin_write_WDOG_CNT(x)  bfin_write_WDOGA_CNT(x)
+# define bfin_write_WDOG_STAT(x) bfin_write_WDOGA_STAT(x)
+#endif
+
+/* Bit in SWRST that indicates boot caused by watchdog */
+#define SWRST_RESET_WDOG 0x4000
+
+/* Bit in WDOG_CTL that indicates watchdog has expired (WDR0) */
+#define WDOG_EXPIRED 0x8000
+
+/* Masks for WDEV field in WDOG_CTL register */
+#define ICTL_RESET   0x0
+#define ICTL_NMI     0x2
+#define ICTL_GPI     0x4
+#define ICTL_NONE    0x6
+#define ICTL_MASK    0x6
+
+/* Masks for WDEN field in WDOG_CTL register */
+#define WDEN_MASK    0x0FF0
+#define WDEN_ENABLE  0x0000
+#define WDEN_DISABLE 0x0AD0
+
+/* some defaults */
+#define WATCHDOG_TIMEOUT 20
+
+static unsigned int timeout = WATCHDOG_TIMEOUT;
+static int nowayout = WATCHDOG_NOWAYOUT;
+static struct watchdog_info bfin_wdt_info;
+static unsigned long open_check;
+static char expect_close;
+static spinlock_t bfin_wdt_spinlock = SPIN_LOCK_UNLOCKED;
+
+/**
+ *	bfin_wdt_keepalive - Keep the Userspace Watchdog Alive
+ *
+ * 	The Userspace watchdog got a KeepAlive: schedule the next timeout.
+ */
+static int bfin_wdt_keepalive(void)
+{
+	stampit();
+	bfin_write_WDOG_STAT(0);
+	return 0;
+}
+
+/**
+ *	bfin_wdt_stop - Stop the Watchdog
+ *
+ *	Stops the on-chip watchdog.
+ */
+static int bfin_wdt_stop(void)
+{
+	stampit();
+	bfin_write_WDOG_CTL(WDEN_DISABLE);
+	return 0;
+}
+
+/**
+ *	bfin_wdt_start - Start the Watchdog
+ *
+ *	Starts the on-chip watchdog.  Automatically loads WDOG_CNT
+ *	into WDOG_STAT for us.
+ */
+static int bfin_wdt_start(void)
+{
+	stampit();
+	bfin_write_WDOG_CTL(WDEN_ENABLE | ICTL_RESET);
+	return 0;
+}
+
+/**
+ *	bfin_wdt_running - Check Watchdog status
+ *
+ *	See if the watchdog is running.
+ */
+static int bfin_wdt_running(void)
+{
+	stampit();
+	return ((bfin_read_WDOG_CTL() & WDEN_MASK) != WDEN_DISABLE);
+}
+
+/**
+ *	bfin_wdt_set_timeout - Set the Userspace Watchdog timeout
+ *	@t: new timeout value (in seconds)
+ *
+ *	Translate the specified timeout in seconds into System Clock
+ *	terms which is what the on-chip Watchdog requires.
+ */
+static int bfin_wdt_set_timeout(unsigned long t)
+{
+	u32 cnt;
+	unsigned long flags;
+
+	stampit();
+
+	cnt = t * get_sclk();
+	if (cnt < get_sclk()) {
+		printk(KERN_WARNING PFX "timeout value is too large\n");
+		return -EINVAL;
+	}
+
+	spin_lock_irqsave(&bfin_wdt_spinlock, flags);
+	{
+		int run = bfin_wdt_running();
+		bfin_wdt_stop();
+		bfin_write_WDOG_CNT(cnt);
+		if (run) bfin_wdt_start();
+	}
+	spin_unlock_irqrestore(&bfin_wdt_spinlock, flags);
+
+	timeout = t;
+
+	return 0;
+}
+
+/**
+ *	bfin_wdt_open - Open the Device
+ *	@inode: inode of device
+ *	@file: file handle of device
+ *
+ *	Watchdog device is opened and started.
+ */
+static int bfin_wdt_open(struct inode *inode, struct file *file)
+{
+	stampit();
+
+	if (test_and_set_bit(0, &open_check))
+		return -EBUSY;
+
+	if (nowayout)
+		__module_get(THIS_MODULE);
+
+	bfin_wdt_keepalive();
+	bfin_wdt_start();
+
+	return nonseekable_open(inode, file);
+}
+
+/**
+ *	bfin_wdt_close - Close the Device
+ *	@inode: inode of device
+ *	@file: file handle of device
+ *
+ *	Watchdog device is closed and stopped.
+ */
+static int bfin_wdt_release(struct inode *inode, struct file *file)
+{
+	stampit();
+
+	if (expect_close == 42) {
+		bfin_wdt_stop();
+	} else {
+		printk(KERN_CRIT PFX "Unexpected close, not stopping watchdog!\n");
+		bfin_wdt_keepalive();
+	}
+
+	expect_close = 0;
+	clear_bit(0, &open_check);
+
+	return 0;
+}
+
+/**
+ *	bfin_wdt_write - Write to Device
+ *	@file: file handle of device
+ *	@buf: buffer to write
+ *	@count: length of buffer
+ *	@ppos: offset
+ *
+ *	Pings the watchdog on write.
+ */
+static ssize_t bfin_wdt_write(struct file *file, const char __user *data,
+                              size_t len, loff_t *ppos)
+{
+	stampit();
+
+	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;
+			}
+		}
+		bfin_wdt_keepalive();
+	}
+
+	return len;
+}
+
+/**
+ *	bfin_wdt_ioctl - Query Device
+ *	@inode: inode of device
+ *	@file: file handle of device
+ *	@cmd: watchdog command
+ *	@arg: argument
+ *
+ *	Query basic information from the device or ping it, as outlined by the
+ *	watchdog API.
+ */
+static int bfin_wdt_ioctl(struct inode *inode, struct file *file,
+                          unsigned int cmd, unsigned long arg)
+{
+	void __user *argp = (void __user *)arg;
+	int __user *p = argp;
+
+	stampit();
+
+	switch (cmd) {
+		default:
+			return -ENOTTY;
+
+		case WDIOC_GETSUPPORT:
+			if (copy_to_user(argp, &bfin_wdt_info, sizeof(bfin_wdt_info)))
+				return -EFAULT;
+			else
+				return 0;
+
+		case WDIOC_GETSTATUS:
+		case WDIOC_GETBOOTSTATUS:
+			return put_user(!!(_bfin_swrst & SWRST_RESET_WDOG), p);
+
+		case WDIOC_KEEPALIVE:
+			bfin_wdt_keepalive();
+			return 0;
+
+		case WDIOC_SETTIMEOUT: {
+			int new_timeout;
+
+			if (get_user(new_timeout, p))
+				return -EFAULT;
+
+			if (bfin_wdt_set_timeout(new_timeout))
+				return -EINVAL;
+		}
+			/* Fall */
+		case WDIOC_GETTIMEOUT:
+			return put_user(timeout, p);
+
+		case WDIOC_SETOPTIONS: {
+			unsigned long flags;
+			int options, ret = -EINVAL;
+
+			if (get_user(options, p))
+				return -EFAULT;
+
+			spin_lock_irqsave(&bfin_wdt_spinlock, flags);
+
+			if (options & WDIOS_DISABLECARD) {
+				bfin_wdt_stop();
+				ret = 0;
+			}
+
+			if (options & WDIOS_ENABLECARD) {
+				bfin_wdt_start();
+				ret = 0;
+			}
+
+			spin_unlock_irqrestore(&bfin_wdt_spinlock, flags);
+
+			return ret;
+		}
+	}
+}
+
+/**
+ *	bfin_wdt_notify_sys - Notifier Handler
+ *	@this: notifier block
+ *	@code: notifier event
+ *	@unused: unused
+ *
+ *	Handles specific events, such as turning off the watchdog during a
+ *	shutdown event.
+ */
+static int bfin_wdt_notify_sys(struct notifier_block *this, unsigned long code,
+                               void *unused)
+{
+	stampit();
+
+	if (code == SYS_DOWN || code == SYS_HALT)
+		bfin_wdt_stop();
+
+	return NOTIFY_DONE;
+}
+
+#ifdef CONFIG_PM
+static int state_before_suspend;
+
+/**
+ *	bfin_wdt_suspend - suspend the watchdog
+ *	@pdev: device being suspended
+ *	@state: requested suspend state
+ *
+ *	Remember if the watchdog was running and stop it.
+ *	TODO: is this even right?  Doesn't seem to be any
+ *	      standard in the watchdog world ...
+ */
+static int bfin_wdt_suspend(struct platform_device *pdev, pm_message_t state)
+{
+	stampit();
+
+	state_before_suspend = bfin_wdt_running();
+	bfin_wdt_stop();
+
+	return 0;
+}
+
+/**
+ *	bfin_wdt_resume - resume the watchdog
+ *	@pdev: device being resumed
+ *
+ *	If the watchdog was running, turn it back on.
+ */
+static int bfin_wdt_resume(struct platform_device *pdev)
+{
+	stampit();
+
+	if (state_before_suspend) {
+		bfin_wdt_set_timeout(timeout);
+		bfin_wdt_start();
+	}
+
+	return 0;
+}
+#else
+# define bfin_wdt_suspend NULL
+# define bfin_wdt_resume NULL
+#endif
+
+static struct platform_device bfin_wdt_device = {
+	.name          = WATCHDOG_NAME,
+	.id            = -1,
+};
+
+static struct platform_driver bfin_wdt_driver = {
+	.driver    = {
+		.name  = WATCHDOG_NAME,
+		.owner = THIS_MODULE,
+	},
+	.suspend   = bfin_wdt_suspend,
+	.resume    = bfin_wdt_resume,
+};
+
+static struct file_operations bfin_wdt_fops = {
+	.owner    = THIS_MODULE,
+	.llseek   = no_llseek,
+	.write    = bfin_wdt_write,
+	.ioctl    = bfin_wdt_ioctl,
+	.open     = bfin_wdt_open,
+	.release  = bfin_wdt_release,
+};
+
+static struct miscdevice bfin_wdt_miscdev = {
+	.minor    = WATCHDOG_MINOR,
+	.name     = "watchdog",
+	.fops     = &bfin_wdt_fops,
+};
+
+static struct watchdog_info bfin_wdt_info = {
+	.identity = "Blackfin Watchdog",
+	.options  = WDIOF_SETTIMEOUT |
+	            WDIOF_KEEPALIVEPING |
+	            WDIOF_MAGICCLOSE,
+};
+
+static struct notifier_block bfin_wdt_notifier = {
+	.notifier_call = bfin_wdt_notify_sys,
+};
+
+/**
+ *	bfin_wdt_init - Initialize module
+ *
+ *	Registers the device and notifier handler. Actual device
+ *	initialization is handled by bfin_wdt_open().
+ */
+static int __init bfin_wdt_init(void)
+{
+	int ret;
+
+	stampit();
+
+	/* Check that the timeout value is within range */
+	if (bfin_wdt_set_timeout(timeout))
+		return -EINVAL;
+
+	/* Since this is an on-chip device and needs no board-specific
+	 * resources, we'll handle all the platform device stuff here.
+	 */
+	ret = platform_device_register(&bfin_wdt_device);
+	if (ret)
+		return ret;
+
+	ret = platform_driver_probe(&bfin_wdt_driver, NULL);
+	if (ret)
+		return ret;
+
+	ret = register_reboot_notifier(&bfin_wdt_notifier);
+	if (ret) {
+		printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n", ret);
+		return ret;
+	}
+
+	ret = misc_register(&bfin_wdt_miscdev);
+	if (ret) {
+		printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
+		       WATCHDOG_MINOR, ret);
+		unregister_reboot_notifier(&bfin_wdt_notifier);
+		return ret;
+	}
+
+	printk(KERN_INFO PFX "initialized: timeout=%d sec (nowayout=%d)\n",
+	       timeout, nowayout);
+
+	return 0;
+}
+
+/**
+ *	bfin_wdt_exit - Deinitialize module
+ *
+ *	Unregisters the device and notifier handler. Actual device
+ *	deinitialization is handled by bfin_wdt_close().
+ */
+static void __exit bfin_wdt_exit(void)
+{
+	misc_deregister(&bfin_wdt_miscdev);
+	unregister_reboot_notifier(&bfin_wdt_notifier);
+}
+
+module_init(bfin_wdt_init);
+module_exit(bfin_wdt_exit);
+
+MODULE_AUTHOR("Michele d'Amico, Mike Frysinger <vapier@gentoo.org>");
+MODULE_DESCRIPTION("Blackfin Watchdog Device Driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
+
+module_param(timeout, uint, 0);
+MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds. (1<=timeout<=((2^32)/SCLK), default=" __MODULE_STRING(WATCHDOG_TIMEOUT) ")");
+
+module_param(nowayout, int, 0);
+MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
diff --git a/drivers/char/watchdog/booke_wdt.c b/drivers/char/watchdog/booke_wdt.c
index 0f5c77ddd39..d362f5bf658 100644
--- a/drivers/char/watchdog/booke_wdt.c
+++ b/drivers/char/watchdog/booke_wdt.c
@@ -144,7 +144,7 @@ static int booke_wdt_open (struct inode *inode, struct file *file)
 				booke_wdt_period);
 	}
 
-	return 0;
+	return nonseekable_open(inode, file);
 }
 
 static const struct file_operations booke_wdt_fops = {
diff --git a/drivers/char/watchdog/cpu5wdt.c b/drivers/char/watchdog/cpu5wdt.c
index d0d45a8b09f..5941ca601a3 100644
--- a/drivers/char/watchdog/cpu5wdt.c
+++ b/drivers/char/watchdog/cpu5wdt.c
@@ -162,6 +162,10 @@ static int cpu5wdt_ioctl(struct inode *inode, struct file *file, unsigned int cm
 			if ( copy_to_user(argp, &value, sizeof(int)) )
 				return -EFAULT;
 			break;
+		case WDIOC_GETBOOTSTATUS:
+			if ( copy_to_user(argp, &value, sizeof(int)) )
+				return -EFAULT;
+			break;
 		case WDIOC_GETSUPPORT:
 			if ( copy_to_user(argp, &ident, sizeof(ident)) )
 				return -EFAULT;
diff --git a/drivers/char/watchdog/davinci_wdt.c b/drivers/char/watchdog/davinci_wdt.c
new file mode 100644
index 00000000000..19db5302ba6
--- /dev/null
+++ b/drivers/char/watchdog/davinci_wdt.c
@@ -0,0 +1,281 @@
+/*
+ * drivers/char/watchdog/davinci_wdt.c
+ *
+ * Watchdog driver for DaVinci DM644x/DM646x processors
+ *
+ * Copyright (C) 2006 Texas Instruments.
+ *
+ * 2007 (c) MontaVista Software, Inc. 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.
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/fs.h>
+#include <linux/miscdevice.h>
+#include <linux/watchdog.h>
+#include <linux/init.h>
+#include <linux/bitops.h>
+#include <linux/platform_device.h>
+#include <linux/spinlock.h>
+
+#include <asm/hardware.h>
+#include <asm/uaccess.h>
+#include <asm/io.h>
+
+#define MODULE_NAME "DAVINCI-WDT: "
+
+#define DEFAULT_HEARTBEAT 60
+#define MAX_HEARTBEAT     600	/* really the max margin is 264/27MHz*/
+
+/* Timer register set definition */
+#define PID12	(0x0)
+#define EMUMGT	(0x4)
+#define TIM12	(0x10)
+#define TIM34	(0x14)
+#define PRD12	(0x18)
+#define PRD34	(0x1C)
+#define TCR	(0x20)
+#define TGCR	(0x24)
+#define WDTCR	(0x28)
+
+/* TCR bit definitions */
+#define ENAMODE12_DISABLED	(0 << 6)
+#define ENAMODE12_ONESHOT	(1 << 6)
+#define ENAMODE12_PERIODIC	(2 << 6)
+
+/* TGCR bit definitions */
+#define TIM12RS_UNRESET		(1 << 0)
+#define TIM34RS_UNRESET		(1 << 1)
+#define TIMMODE_64BIT_WDOG      (2 << 2)
+
+/* WDTCR bit definitions */
+#define WDEN			(1 << 14)
+#define WDFLAG			(1 << 15)
+#define WDKEY_SEQ0		(0xa5c6 << 16)
+#define WDKEY_SEQ1		(0xda7e << 16)
+
+static int heartbeat = DEFAULT_HEARTBEAT;
+
+static spinlock_t io_lock;
+static unsigned long wdt_status;
+#define WDT_IN_USE        0
+#define WDT_OK_TO_CLOSE   1
+#define WDT_REGION_INITED 2
+#define WDT_DEVICE_INITED 3
+
+static struct resource	*wdt_mem;
+static void __iomem	*wdt_base;
+
+static void wdt_service(void)
+{
+	spin_lock(&io_lock);
+
+	/* put watchdog in service state */
+	davinci_writel(WDKEY_SEQ0, wdt_base + WDTCR);
+	/* put watchdog in active state */
+	davinci_writel(WDKEY_SEQ1, wdt_base + WDTCR);
+
+	spin_unlock(&io_lock);
+}
+
+static void wdt_enable(void)
+{
+	u32 tgcr;
+	u32 timer_margin;
+
+	spin_lock(&io_lock);
+
+	/* disable, internal clock source */
+	davinci_writel(0, wdt_base + TCR);
+	/* reset timer, set mode to 64-bit watchdog, and unreset */
+	davinci_writel(0, wdt_base + TGCR);
+	tgcr = TIMMODE_64BIT_WDOG | TIM12RS_UNRESET | TIM34RS_UNRESET;
+	davinci_writel(tgcr, wdt_base + TGCR);
+	/* clear counter regs */
+	davinci_writel(0, wdt_base + TIM12);
+	davinci_writel(0, wdt_base + TIM34);
+	/* set timeout period */
+	timer_margin = (((u64)heartbeat * CLOCK_TICK_RATE) & 0xffffffff);
+	davinci_writel(timer_margin, wdt_base + PRD12);
+	timer_margin = (((u64)heartbeat * CLOCK_TICK_RATE) >> 32);
+	davinci_writel(timer_margin, wdt_base + PRD34);
+	/* enable run continuously */
+	davinci_writel(ENAMODE12_PERIODIC, wdt_base + TCR);
+	/* Once the WDT is in pre-active state write to
+	 * TIM12, TIM34, PRD12, PRD34, TCR, TGCR, WDTCR are
+	 * write protected (except for the WDKEY field)
+	 */
+	/* put watchdog in pre-active state */
+	davinci_writel(WDKEY_SEQ0 | WDEN, wdt_base + WDTCR);
+	/* put watchdog in active state */
+	davinci_writel(WDKEY_SEQ1 | WDEN, wdt_base + WDTCR);
+
+	spin_unlock(&io_lock);
+}
+
+static int davinci_wdt_open(struct inode *inode, struct file *file)
+{
+	if (test_and_set_bit(WDT_IN_USE, &wdt_status))
+		return -EBUSY;
+
+	wdt_enable();
+
+	return nonseekable_open(inode, file);
+}
+
+static ssize_t
+davinci_wdt_write(struct file *file, const char *data, size_t len,
+		  loff_t *ppos)
+{
+	if (len)
+		wdt_service();
+
+	return len;
+}
+
+static struct watchdog_info ident = {
+	.options = WDIOF_KEEPALIVEPING,
+	.identity = "DaVinci Watchdog",
+};
+
+static int
+davinci_wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
+		  unsigned long arg)
+{
+	int ret = -ENOTTY;
+
+	switch (cmd) {
+	case WDIOC_GETSUPPORT:
+		ret = copy_to_user((struct watchdog_info *)arg, &ident,
+				   sizeof(ident)) ? -EFAULT : 0;
+		break;
+
+	case WDIOC