This commit add a driver for the watchdog functionality of the Conexant CX92755
SoC, from the Digicolor series of SoCs. Of 8 system timers provided by the
CX92755, the first one, timer A, can reset the chip when its counter reaches
zero. This driver uses this capability to provide userspace with a standard
watchdog, using the watchdog timer driver core framework. This driver also
implements a reboot handler for the reboot(2) system call.

The watchdog driver shares the timer registers with the CX92755 timer driver
(drivers/clocksource/timer-digicolor.c). The timer driver, however, uses only
timers other than A, so both drivers should coexist.
Signed-off-by: NBaruch Siach <baruch@tkos.co.il>
Reviewed-by: NGuenter Roeck <linux@roeck-us.net>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

Signed-off-by: NDavid Paris <david.paris@st.com>
Signed-off-by: NLee Jones <lee.jones@linaro.org>
Reviewed-by: NGuenter Roeck <linux@roeck-us.net>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

This patch adds a driver for the Mediatek SoC integrated
watchdog. This driver supports watchdog and software reset
for mt65xx and mt81xx SoCs.
Signed-off-by: NMatthias Brugger <matthias.bgg@gmail.com>
Tested-by: NEddie Huang <eddie.huang@mediatek.com>
Reviewed-by: NGuenter Roeck <linux@roeck-us.net>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

This commit adds support for ImgTec PowerDown Controller Watchdog Timer.
Reviewed-by: NAndrew Bresticker <abrestic@chromium.org>
Signed-off-by: NNaidu Tellapati <Naidu.Tellapati@imgtec.com>
Signed-off-by: NJude Abraham <Jude.Abraham@imgtec.com>
[ezequiel: Minor style fixes]
Signed-off-by: NEzequiel Garcia <ezequiel.garcia@imgtec.com>
Reviewed-by: NGuenter Roeck <linux@roeck-us.net>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

This patch adds the watchdog driver for the Amlogic Meson SoCs used also
to reboot the device.
Signed-off-by: NCarlo Caione <carlo@caione.org>
Reviewed-by: NGuenter Roeck <linux@roeck-us.net>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

This driver supports the watchdog device inside the DA9063 PMIC.
Signed-off-by: NKrystian Garbaciak <krystian.garbaciak@diasemi.com>
Signed-off-by: NPhilipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: NMarkus Pargmann <mpa@pengutronix.de>
Acked-by: NSteve Twiss <stwiss.opensource@diasemi.com>
Tested-by: NSteve Twiss <stwiss.opensource@diasemi.com>
Reviewed-by: NGuenter Roeck <linux@roeck-us.net>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

This adds a driver for the watchdog timer available in Ricoh RN5T618
PMIC. The device supports a programmable expiration time of 1, 8, 32
or 128 seconds.
Signed-off-by: NBeniamino Galvani <b.galvani@gmail.com>
Reviewed-by: NGuenter Roeck <linux@roeck-us.net>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

Add a driver for the watchdog timer block found in the Krait Processor
Subsystem (KPSS) on the MSM8960, APQ8064, and IPQ8064.
Signed-off-by: NJosh Cartwright <joshc@codeaurora.org>
Reviewed-by: NGuenter Roeck <linux@roeck-us.net>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

Add Cadence WDT driver. This is used by Xilinx Zynq.
Signed-off-by: NHarini Katakam <harinik@xilinx.com>
Reviewed-by: NGuenter Roeck <linux@roeck-us.net>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

Added driver to support the 14F021P00 BMC Watchdog.
The BMC is a Board Management Controller including watchdog functionality.
Signed-off-by: NAndreas Werner <andreas.werner@men.de>
Reviewed-by: NGuenter Roeck <linux@roeck-us.net>
Signed-off-by: NLee Jones <lee.jones@linaro.org>

Add initial Intel MID watchdog driver support.

This driver is an initial implementation of generic Intel MID watchdog
driver. Currently it supports Intel Merrifield platform.
Signed-off-by: NEric Ernst <eric.ernst@intel.com>
Signed-off-by: NDavid Cohen <david.a.cohen@linux.intel.com>
Reviewed-by: NGuenter Roeck <linux@roeck-us.net>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

Since both chips are now supported by the w83627hf watchdog driver,
the chip specific drivers are no longer needed and can be removed.
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

Converted the vmwatchdog driver to use the kernel's watchdog API.
Signed-off-by: NPhilipp Hachtmann <phacht@de.ibm.com>
Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>

Add a driver for the hardware watchdogs in NVIDIA Tegra SoCs (Tegra30 and
later).  This driver will configure one watchdog timer that will reset the
system in the case of a watchdog timeout.

This driver binds to the nvidia,tegra30-timer device node and gets its
register base from there.
Signed-off-by: NAndrew Chew <achew@nvidia.com>
Reviewed-by: NGuenter Roeck <linux@roeck-us.net>
Tested-by: NStephen Warren <swarren@nvidia.com>
Reviewed-by: NStephen Warren <swarren@nvidia.com>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

This patch adds a watchdog driver for devices controlled through GPIO,
(Analog Devices ADM706, Maxim MAX823, National NE555 etc).
Signed-off-by: NAlexander Shiyan <shc_work@mail.ru>
Reviewed-by: NGuenter Roeck <linux@roeck-us.net>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

This commit adds support for the watchdog timer used on the BCM281xx
family of SoCs.
Signed-off-by: NMarkus Mayer <markus.mayer@linaro.org>
Reviewed-by: NMatt Porter <matt.porter@linaro.org>
Reviewed-by: NGuenter Roeck <linux@roeck-us.net>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

On CSR SiRFprimaII and SiRFatlasVI, the 6th timer can act as a watchdog
timer when the Watchdog mode is enabled.

watchdog occur when TIMER watchdog counter matches the value software
pre-set, when this event occurs, the effect is the same as the system
software reset.
Signed-off-by: NXianglong Du <Xianglong.Du@csr.com>
Signed-off-by: NBarry Song <Baohua.Song@csr.com>
Cc: Romain Izard <romain.izard.pro@gmail.com>
Reviewed-by: NGuenter Roeck <linux@roeck-us.net>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

Add a driver for the watchdog timer found on Ralink SoC
Signed-off-by: NJohn Crispin <blogic@openwrt.org>
Signed-off-by: NGabor Juhos <juhosg@openwrt.org>
Reviewed-by: NGuenter Roeck <linux@roeck-us.net>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>
Cc: linux-watchdog@vger.kernel.org
Cc: linux-mips@linux-mips.org
Cc: devicetree-discuss@lists.ozlabs.org

This patch adds a watchdog driver for the main hardware watchdog timer
found on MOXA ART SoCs.

The MOXA ART SoC provides one writable timer register, restarting
the hardware once it reaches zero. The register is auto decremented
every APB clock cycle.
Signed-off-by: NJonas Jensen <jonas.jensen@gmail.com>
Reviewed-by: NGuenter Roeck <linux@roeck-us.net>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

Architecture is gone.

Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Acked-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: NWim Van Sebroeck <wim@iguana.be>
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>

This patch adds the driver for the watchdog found in the Allwinner A10 and
A13 SoCs. It has DT-support and uses the new watchdog framework.
Signed-off-by: NCarlo Caione <carlo.caione@gmail.com>
Acked-by: NMaxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

This patch adds the driver for the watchdog devices found on MEN Mikro
Elektronik A21 VMEbus CPU Carrier Boards. It has DT-support and uses the
watchdog framework.
Signed-off-by: NJohannes Thumshirn <johannes.thumshirn@men.de>
Reviewed-by: NGuenter Roeck <linux@roeck-us.net>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

This adds a driver for watchdog timer hardware present on Broadcom BCM2835 SoC,
used in Raspberry Pi and Roku 2 devices.
Signed-off-by: NLubomir Rintel <lkundrak@v3.sk>
Tested-by: NStephen Warren <swarren@wwwdotorg.org>
Reviewed-by: NGuenter Roeck <linux@roeck-us.net>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>
Cc: linux-rpi-kernel@lists.infradead.org
Cc: linux-watchdog@vger.kernel.org
Cc: devicetree-discuss@lists.ozlabs.org

Interrupt request doesn't use the right API: The TWD watchdog uses a per-cpu
interrupt (usually interrupt #30), and the GIC configuration should flag it as
such. With this setup, request_irq() should fail, and the right API is
request_percpu_irq(), together with enable_percpu_irq()/disable_percpu_irq().

Nothing ensures the userspace ioctl() will end-up kicking the watchdog on the
right CPU.

There are no users of this driver since a long time and it makes more sense to
get rid of it as nobody is looking to fix it.

In case somebody wakes up after this has been removed and needs it, please
revert this driver and pick these updates (These were never pushed to mainline):

http://comments.gmane.org/gmane.linux.ports.arm.kernel/245998Signed-off-by: NViresh Kumar <viresh.kumar@linaro.org>
Acked-by: NGuenter Roeck <linux@roeck-us.net>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

Add watchdog timer support for the on-board PLD found on some Kontron
embedded modules.

Originally-From: Michael Brunner <michael.brunner@kontron.com>
Signed-off-by: NKevin Strasser <kevin.strasser@linux.intel.com>
Acked-by: NGuenter Roeck <linux@roeck-us.net>
Acked-by: NDarren Hart <dvhart@linux.intel.com>
Acked-by: NWim Van Sebroeck <wim@iguana.be>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

Now that the new driver is in place, we can remove the old one.
Signed-off-by: NWolfram Sang <w.sang@pengutronix.de>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

Replace the existing STMP3xxx driver because it has enough drawbacks
that a rewrite is apropriate. The new driver is designed to use the
watchdog framework which makes it a lot smaller and avoids open coding
the watchdog API again. It also uses now an explicitly exported function
from the RTC driver to set up its registers (the old driver silently
reused the hopefully(!) already remapped RTC registers). Also, this
driver is mach independent, while the old one depends on a mach replaced
by another one a year ago. Since the user interface is still the
standard watchdog API, users don't need to adapt.
Signed-off-by: NWolfram Sang <w.sang@pengutronix.de>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

Introduce Retu watchdog driver.

Cc: linux-watchdog@vger.kernel.org
Acked-by: NFelipe Balbi <balbi@ti.com>
Acked-by: NTony Lindgren <tony@atomide.com>
Signed-off-by: NAaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

This patch adds support for the ux500_wdt watchdog that is found in
ST-Ericsson Ux500 platform.  The driver is based on PRCMU APIs.
Acked-by: NLinus Walleij <linus.walleij@linaro.org>
Acked-by: NLee Jones <lee.jones@linaro.org>
Acked-by: NWim Van Sebroeck <wim@iguana.be>
Signed-off-by: NFabio Baltieri <fabio.baltieri@linaro.org>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

This is the Watchdog patch for the DA9055 PMIC. This patch has got dependency on
the DA9055 MFD core.

This patch is functionally tested on SMDK6410
Signed-off-by: NDavid Dajun Chen <dchen@diasemi.com>
Signed-off-by: NAshish Jangam <ashish.jangam@kpitcummins.com>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

This driver adds support for the watchdog functionality provided by
the Dialog Semiconductor DA9052 PMIC chip.

Tested on samsung smdkv6410 and i.mx53 QS boards.
Signed-off-by: NAnthony Olech <Anthony.Olech@diasemi.com>
Signed-off-by: NAshish Jangam <ashish.jangam@kpitcummins.com>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

Add driver for the watchdog timer built into the
Intel Atom E6XX (TunnelCreek) processor.
Signed-off-by: NAlexander Stein <alexander.stein@systec-electronic.com>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

The platform is removed, so there are no users of this driver.
Signed-off-by: NRob Herring <rob.herring@calxeda.com>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

New driver for the hardware watchdog timer on VIA chipsets.
This driver uses the new watchdog framework.
PnP must be enabled in BIOS to get full control of watchdog registers.
The timer code has been added by Wim Van Sebroeck.
Tested on a Artigo A1100, VX855 chipset.
Signed-off-by: NMarc Vertes <marc.vertes@sigfox.com>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

Remove the driver (that was added in v2.6.32) since the architecture
has never been merged into mainline.
Reported-by: NPaul Bolle <pebolle@tiscali.nl>
Acked-by: NThierry Reding <thierry.reding@avionic-design.de>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

The WatchDog Timer Driver Core is a framework
that contains the common code for all watchdog-driver's.
It also introduces a watchdog device structure and the
operations that go with it.

This is the introduction of this framework. This part
supports the minimal watchdog userspace API (or with
other words: the functionality to use /dev/watchdog's
open, release and write functionality as defined in
the simplest watchdog API). Extra functionality will
follow in the next set of patches.
Signed-off-by: NAlan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>
Acked-by: NArnd Bergmann <arnd@arndb.de>
Acked-by: NWolfram Sang <w.sang@pengutronix.de>

Watchdog timer device driver for Xilinx xps_timebase_wdt compatible ip cores.
It takes watchdog timer configuration from device tree and it needs that its
parent has defined the property "clock-frecuency".
It is compatible with watchdog timer kernel API, so user apps like watchdogd
may talk with it.
Signed-off-by: NAlejandro Cabrera <aldaya@gmail.com>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

The Synopsys DesignWare watchdog is found in several ARM based systems
and provides a choice of 16 timeout periods depending on the clock
input.  The watchdog cannot be disabled once started.
Signed-off-by: NJamie Iles <jamie@jamieiles.com>
Acked-by: NViresh Kumar <viresh.kumar@st.com>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

This patch adds the driver for the watchdog found inside the Lantiq SoC family.
Signed-off-by: NJohn Crispin <blogic@openwrt.org>
Signed-off-by: NRalph Hempel <ralph.hempel@lantiq.com>
Cc: Wim Van Sebroeck <wim@iguana.be>
Cc: linux-mips@linux-mips.org
Cc: linux-watchdog@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/2327/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

Fixes generated by 'codespell' and manually reviewed.
Signed-off-by: NLucas De Marchi <lucas.demarchi@profusion.mobi>