Add support for the ICH9 I/O chipsets to iTCO_wdt.
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

Add all LPC bridges for the 631xESB/632xESB I/O chipset.
The datasheet says:
* Device Function = B0:D31:FO
* Function Description = LPC interface
* DEV ID = 267xh
* Comment = 2670h-267Fh
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

Add 631xESB/632xESB support to the iTCO_wdt driver.
Signed-off-by: NSergey Kononenko <sergk@sergk.org.ua>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

The default value for an unknown ioctl call is -ENOTTY.
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

Return the value of the nonseekable_open function and not 0.
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

Consolidate the timeout config register modification into a single
function.  Also, use the enabled flag in the config register to
determine whether the timer is enabled instead of a separately
maintained flag, MV64x60_WDOG_FLAG_ENABLED.

Add spinlock protection around enabling/disabling the watchdog timer.
Signed-off-by: NDale Farnsworth <dale@farnsworth.org>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

Make sure that we disable the watchdog at start-up.
Signed-off-by: NDale Farnsworth <dale@farnsworth.org>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

Disallow disabling of the watchdog timer unless a particular
character ('V') was recently written to the watchdog device.
Signed-off-by: NDale Farnsworth <dale@farnsworth.org>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

Also, use the WATCHDOG_NOWAYOUT macro, rather than #ifdefs,
and use __module_get to prevent module unloading if WATCHDOG_NOWAYOUT
is set.
Signed-off-by: NDale Farnsworth <dale@farnsworth.org>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

Allow the watchdog timer to be enabled or disabled via the
WDIOC_SETOPTIONS ioctl.
Signed-off-by: NDale Farnsworth <dale@farnsworth.org>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

Add the ability to modify the watchdog timer timeout interval.
Signed-off-by: NDale Farnsworth <dale@farnsworth.org>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

WDIOC_GETTIMEOUT returns seconds, not jiffies.
Signed-off-by: NDale Farnsworth <dale@farnsworth.org>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

Return the value of the nonseekable_open function and not 0.
Signed-off-by: NDale Farnsworth <dale@farnsworth.org>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

Add support for arch/powerpc, specifically for the prpmc2800 platform.
Signed-off-by: NDale Farnsworth <dale@farnsworth.org>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

Previously, the address of the watchdog timer registers was
retrieved by calling a global function, mv64x60_get_bridge_vbase().
That function doesn't exist in arch/powerpc.  Instead, we now get
the register address from a platform data resource and ioremap
the registers within the driver.
Signed-off-by: NDale Farnsworth <dale@farnsworth.org>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

The driver previously registered its platform device data in its own
init function--that's bogus.  Move that code to platform-specific
code in arch/ppc.  This is being done so that the platform code can
decide at runtime whether to initialize this driver or not.
Signed-off-by: NDale Farnsworth <dale@farnsworth.org>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

1. Ensure that the mouse and keyboard do not ping the watchdog.
This is the default operation of the w83627, but some BIOSes change this.

2. Increase the max timeout from 63 seconds to 255 seconds
as supported by the w83627 chip

3. Comment that the watchdog supports the w83627hg version of the chip
Signed-Off-By: NPádraig Brady <P@draigBrady.com>
Tested-by: NTomas Hodek <tomas.hodek@volny.cz>
Signed-Off-By: NWim Van Sebroeck <wim@iguana.be>

Fixup the s3c2410 watchdog driver after moving some
of the arch specific includes it has been relying on.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

From: Andrew Morton <akpm@linux-foundation.org>

This driver isn't very coding-style friendly.
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>

Clean-up of the watchdog's Kconfig and makefile files.
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

Add mandatory WDIOC_GETSTATUS and WDIOC_GETBOOTSTATUS ioctl's for
drivers that don't have them yet.
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

All watchdog device drivers are VFSs (Virtual File Systems).
We thus return a nonseekable_open(inode, file) when we open the VFS.
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

* Remove the redundant check for pwrite(), given that the open() routine
  already invokes nonseekable_open().
* The WDIOF_CARDRESET flag can only be used when you can read this status
  via the WDIOC_GETSTATUS ioctl call.
* Add the mandatory WDIOC_GETBOOTSTATUS ioctl call.
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

* Add MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
* Add mandatory WDIOC_GETSTATUS and WDIOC_GETBOOTSTATUS ioctl's.
* If unknown ioctl is used we should return -ENOTTY.
* All watchdog device drivers are VFSs (Virtual File Systems).
  We thus return a nonseekable_open(inode, file) when we open the VFS.
* Make sure that /dev/watchdog can be opened by 1 parent
* Add spin-locking to prevent that forked children can disturb
  each other's operations.
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

Add watchdog support for TI Davinci DM644x/DM646x processors.

Signed-off-by: Vladimir Barinov <vbarinov@ru.mvista.com> 
Signed-off-by: Kevin Hilman <khilman@mvista.com> 
Signed-off-by: Wim Van Sebroeck <wim@iguana.be> 

This patch implements the driver necessary use the Analog Devices
Blackfin processor's on-chip watchdog controller, supports
BF53[123]/BF53[467]/BF54[2489]/BF561.
Signed-off-by: NMike Frysinger <michael.frysinger@analog.com>
Signed-off-by: NBryan Wu <bryan.wu@analog.com>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

Driver for internal mpc5200 watchdog on general purpose timer 0.
For IPB clock of 132 MHz the maximum timeout is about 32 seconds.
Signed-off-by: NDomen Puncer <domen.puncer@telargo.com>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

In order for this driver to be shared across the iop architectures the
iop3xx and iop13xx header files are modified to present a common interface
for the iop_wdt driver.

Details:
* iop13xx supports disabling the timer while iop3xx does not.  This requires
  a few 'compatibility' definitions in include/asm-arm/hardware/iop3xx.h to
  preclude adding #ifdef CONFIG_ARCH_IOP13XX blocks to the driver code.
* The heartbeat interval is derived from the internal bus clock rate, so this
  this patch also exports the tick rate to the iop_wdt driver.

Cc: Curt Bruns <curt.e.bruns@intel.com>
Cc: Peter Milne <peter.milne@d-tacq.com>
Signed-off-by: NDan Williams <dan.j.williams@intel.com>
Acked-by: NWim Van Sebroeck <wim@iguana.be>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Both shwdt and rtc-sh are only supported on SH-3 and SH-4 at
the moment, don't allow them to break the SH-2 and SH-5 (sh64)
builds.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Transform some calls to kmalloc/memset to a single kzalloc (or kcalloc).

Here is a short excerpt of the semantic patch performing
this transformation:

@@
type T2;
expression x;
identifier f,fld;
expression E;
expression E1,E2;
expression e1,e2,e3,y;
statement S;
@@

 x =
- kmalloc
+ kzalloc
  (E1,E2)
  ...  when != \(x->fld=E;\|y=f(...,x,...);\|f(...,x,...);\|x=E;\|while(...) S\|for(e1;e2;e3) S\)
- memset((T2)x,0,E1);

@@
expression E1,E2,E3;
@@

- kzalloc(E1 * E2,E3)
+ kcalloc(E1,E2,E3)

[akpm@linux-foundation.org: get kcalloc args the right way around]
Signed-off-by: NYoann Padioleau <padator@wanadoo.fr>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Acked-by: NRussell King <rmk@arm.linux.org.uk>
Cc: Bryan Wu <bryan.wu@analog.com>
Acked-by: NJiri Slaby <jirislaby@gmail.com>
Cc: Dave Airlie <airlied@linux.ie>
Acked-by: NRoland Dreier <rolandd@cisco.com>
Cc: Jiri Kosina <jkosina@suse.cz>
Acked-by: NDmitry Torokhov <dtor@mail.ru>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: NMauro Carvalho Chehab <mchehab@infradead.org>
Acked-by: NPierre Ossman <drzeus-list@drzeus.cx>
Cc: Jeff Garzik <jeff@garzik.org>
Cc: "David S. Miller" <davem@davemloft.net>
Acked-by: NGreg KH <greg@kroah.com>
Cc: James Bottomley <James.Bottomley@steeleye.com>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Fix warning:
* ISO C90 forbids mixed declarations and code
* passing argument 2 of ‘test_and_set_bit’ from incompatible pointer type
* passing argument 2 of ‘clear_bit’ from incompatible pointer type
Signed-off-by: NHans-Christian Egtvedt <hcegtvedt@atmel.com>
Cc: Haavard Skinnemoen <hskinnemoen@atmel.com>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>
Cc: Andrew Morton <akpm@linux-foundation.org>

Add spinlock support so that forked children can't
do different io stuff at the same time.
Signed-off-by: NHans-Christian Egtvedt <hcegtvedt@atmel.com>
Cc: Haavard Skinnemoen <hskinnemoen@atmel.com>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>
Cc: Andrew Morton <akpm@linux-foundation.org>

Add nowayout + MAGICCLOSE features.
Signed-off-by: NHans-Christian Egtvedt <hcegtvedt@atmel.com>
Cc: Haavard Skinnemoen <hskinnemoen@atmel.com>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>
Cc: Andrew Morton <akpm@linux-foundation.org>

integrate the timeout/heartbeat as a module parameter and not as
a CONFIG_* value.
Signed-off-by: NHans-Christian Egtvedt <hcegtvedt@atmel.com>
Cc: Haavard Skinnemoen <hskinnemoen@atmel.com>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>
Cc: Andrew Morton <akpm@linux-foundation.org>

need space after that ',' (ctx:VxV)
inline keyword should sit between storage class and type
Signed-off-by: NHans-Christian Egtvedt <hcegtvedt@atmel.com>
Cc: Haavard Skinnemoen <hskinnemoen@atmel.com>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>
Cc: Andrew Morton <akpm@linux-foundation.org>

Move to using dev_info(), dev_dbg() and dev_err() for
reporting information from the driver.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

Announce the watchdog once the initialisation is
complete. This aides debugging problems where the
watchdog driver has been loaded and shows the
current state for the user.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

Signed-off-by: NHans-Christian Egtvedt <hcegtvedt@atmel.com>
Cc: Haavard Skinnemoen <hskinnemoen@atmel.com>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>

Signed-off-by: NHans-Christian Egtvedt <hcegtvedt@atmel.com>
Cc: Haavard Skinnemoen <hskinnemoen@atmel.com>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>

standard ifdef-reduction trick.

Cc: Haavard Skinnemoen <hskinnemoen@atmel.com>
Cc: Hans-Christian Egtvedt <hcegtvedt@atmel.com>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>