watchdog: Remove AMD Elan SC520 processor watchdog driver

AMD Elan support was removed from the upstream kernel with commit
8b793a92d862 ("x86/cpu: Remove M486/M486SX/ELAN support"). Its
watchdog dr

watchdog: Remove AMD Elan SC520 processor watchdog driver

AMD Elan support was removed from the upstream kernel with commit
8b793a92d862 ("x86/cpu: Remove M486/M486SX/ELAN support"). Its
watchdog driver can no longer be enabled except for test builds.
Remove it.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

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watchdog: atcwdt200: Add driver for Andes ATCWDT200

Add support for the Andes ATCWDT200 watchdog timer. The driver implements
programmable reset and interrupt timers, and includes automatic detectio

watchdog: atcwdt200: Add driver for Andes ATCWDT200

Add support for the Andes ATCWDT200 watchdog timer. The driver implements
programmable reset and interrupt timers, and includes automatic detection
of the supported IntTime bit-width.

Integrated with the Linux watchdog framework, it supports basic operations
including start, stop, ping, timeout configuration, and system reset via
the restart handler.

Signed-off-by: CL Wang <cl634@andestech.com>
Link: https://lore.kernel.org/r/20260115081444.2452357-3-cl634@andestech.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

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watchdog: Add driver for Gunyah Watchdog

On Qualcomm SoCs running under the Gunyah hypervisor, access to watchdog
through MMIO is not available on all platforms. Depending on the
hypervisor configur

watchdog: Add driver for Gunyah Watchdog

On Qualcomm SoCs running under the Gunyah hypervisor, access to watchdog
through MMIO is not available on all platforms. Depending on the
hypervisor configuration, the watchdog is either fully emulated or
exposed via ARM's SMC Calling Conventions (SMCCC) through the Vendor
Specific Hypervisor Service Calls space.

Add driver to support the SMC-based watchdog provided by the Gunyah
Hypervisor. Device registration is done in the QCOM SCM driver after
checks to restrict the watchdog initialization to Qualcomm devices
running under Gunyah.

Gunyah watchdog is not a hardware but an SMC-based vendor-specific
hypervisor interface provided by the Gunyah hypervisor. The design
involving QCOM SCM driver for registering the platform device has been
devised to avoid adding non-hardware nodes to devicetree.

Tested-by: Shivendra Pratap <shivendra.pratap@oss.qualcomm.com>
Tested-by: Neil Armstrong <neil.armstrong@linaro.org>
Tested-by: Mukesh Ojha <mukesh.ojha@oss.qualcomm.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Signed-off-by: Hrishabh Rajput <hrishabh.rajput@oss.qualcomm.com>
Signed-off-by: Pavankumar Kondeti <pavan.kondeti@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20260311-gunyah_watchdog-v8-2-4c1c0689de22@oss.qualcomm.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

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watchdog: remove driver for integrated WDT of ZFx86 486-based SoC

The machzwd driver supports the integrated watchdog of the ZF Micro
ZFx86 SoC, which contains a 486-compatible core [1]. Since 486
s

watchdog: remove driver for integrated WDT of ZFx86 486-based SoC

The machzwd driver supports the integrated watchdog of the ZF Micro
ZFx86 SoC, which contains a 486-compatible core [1]. Since 486
support was removed in commit 8b793a92d862 ("x86/cpu: Remove
M486/M486SX/ELAN support"), the driver is no longer useful, Remove it.

[1] https://www.zfmicro.com/zfx86.html

Signed-off-by: Ethan Nelson-Moore <enelsonmoore@gmail.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20260428014806.35400-1-enelsonmoore@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

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watchdog: iTCO: Drop vendor support

iTCO vendor support was introduced in 2006 to support SuperMicro boards
with Pentium 3 CPUs. It was extended in 2009 to support motherbords
with broken BIOS (spec

watchdog: iTCO: Drop vendor support

iTCO vendor support was introduced in 2006 to support SuperMicro boards
with Pentium 3 CPUs. It was extended in 2009 to support motherbords
with broken BIOS (specifically Intel DG33TL). The code is long since
obsolete, so let's drop support for it.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Wim Van Sebroeck <wim@linux-watchdog.org>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>

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watchdog: renesas_wwdt: add driver

This driver adds support for the Renesas Window Watchdog Timer (WWDT).
Because it can only be setup once after boot and we cannot know if this
already happened in

watchdog: renesas_wwdt: add driver

This driver adds support for the Renesas Window Watchdog Timer (WWDT).
Because it can only be setup once after boot and we cannot know if this
already happened in early boot stages, it is mandated that the firmware
configures the watchdog. Linux then adapts according to the given
setup. Note that this watchdog only reports an overflow to the Error
Control Module (ECM) and does not reset the SoC on its own.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>

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watchdog: Add Nuvoton NCT6694 WDT support

This driver supports Watchdog timer functionality for NCT6694 MFD
device based on USB interface.

Acked-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by

watchdog: Add Nuvoton NCT6694 WDT support

This driver supports Watchdog timer functionality for NCT6694 MFD
device based on USB interface.

Acked-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Ming Yu <a0282524688@gmail.com>
Link: https://lore.kernel.org/r/20250912091952.1169369-6-a0282524688@gmail.com
Signed-off-by: Lee Jones <lee@kernel.org>

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watchdog: Add driver for Intel OC WDT

Add a driver for the Intel Over-Clocking Watchdog found in Intel
Platform Controller (PCH) chipsets. This watchdog is controlled
via a simple single-register in

watchdog: Add driver for Intel OC WDT

Add a driver for the Intel Over-Clocking Watchdog found in Intel
Platform Controller (PCH) chipsets. This watchdog is controlled
via a simple single-register interface and would otherwise be
standard except for the presence of a LOCK bit that can only be
set once per power cycle, needing extra handling around it.

Signed-off-by: Diogo Ivo <diogo.ivo@siemens.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20250317-ivo-intel_oc_wdt-v3-1-32c396f4eefd@siemens.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>

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watchdog: Add the Watchdog Timer for the NXP S32 platform

The S32 platform has several Watchdog Timer available and tied with a
CPU. The SWT0 is the only one which directly asserts the reset line,
o

watchdog: Add the Watchdog Timer for the NXP S32 platform

The S32 platform has several Watchdog Timer available and tied with a
CPU. The SWT0 is the only one which directly asserts the reset line,
other SWT require an external setup to configure the reset behavior
which is not part of this change.

As a side note, in the NXP documentation, the s32g2 and s32g3
reference manuals refer the watchdog as the 'Software Timer Watchdog'
where the name can be misleading as it is actually a hardware
watchdog.

The maximum watchdog timeout value depends on the clock feeding the
SWT counter which is 32bits wide. On the s32g274-rb2, the clock has a
rate of 51MHz which result on 83 seconds maximum timeout.

The timeout can be specified via the device tree with the usual
existing bindings 'timeout-sec' or via the module param timeout.

The watchdog can be loaded with the 'nowayout' option, preventing the
watchdog to be stopped.

The watchdog can be started at boot time with the 'early-enable'
option, thus letting the watchdog framework to service the watchdog
counter.

The watchdog support the magic character to stop when the userspace
releases the device.

Cc: Ghennadi Procopciuc <ghennadi.procopciuc@nxp.com>
Cc: Thomas Fossati <thomas.fossati@linaro.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Tested-by: Alexandru-Catalin Ionita <alexandru-catalin.ionita@nxp.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20250410082616.1855860-3-daniel.lezcano@linaro.org
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>

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watchdog: lenovo_se30_wdt: Watchdog driver for Lenovo SE30 platform

Watchdog driver implementation for Lenovo SE30 platform.

Signed-off-by: Mark Pearson <mpearson-lenovo@squebb.ca>
Reviewed-by: Gue

watchdog: lenovo_se30_wdt: Watchdog driver for Lenovo SE30 platform

Watchdog driver implementation for Lenovo SE30 platform.

Signed-off-by: Mark Pearson <mpearson-lenovo@squebb.ca>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20250131204855.1827-1-mpearson-lenovo@squebb.ca
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>

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Merge tag 'linux-watchdog-6.13-rc1' of git://www.linux-watchdog.org/linux-watchdog

Pull watchdog updates from Wim Van Sebroeck:

- Add support for exynosautov920 SoC

- Add support for Airoha EN78

Merge tag 'linux-watchdog-6.13-rc1' of git://www.linux-watchdog.org/linux-watchdog

Pull watchdog updates from Wim Van Sebroeck:

- Add support for exynosautov920 SoC

- Add support for Airoha EN7851 watchdog

- Add support for MT6735 TOPRGU/WDT

- Delete the cpu5wdt driver

- Always print when registering watchdog fails

- Several other small fixes and improvements

* tag 'linux-watchdog-6.13-rc1' of git://www.linux-watchdog.org/linux-watchdog: (36 commits)
watchdog: rti: of: honor timeout-sec property
watchdog: s3c2410_wdt: add support for exynosautov920 SoC
dt-bindings: watchdog: Document ExynosAutoV920 watchdog bindings
watchdog: mediatek: Add support for MT6735 TOPRGU/WDT
watchdog: mediatek: Make sure system reset gets asserted in mtk_wdt_restart()
dt-bindings: watchdog: fsl-imx-wdt: Add missing 'big-endian' property
dt-bindings: watchdog: Document Qualcomm QCS8300
docs: ABI: Fix spelling mistake in pretimeout_avaialable_governors
Revert "watchdog: s3c2410_wdt: use exynos_get_pmu_regmap_by_phandle() for PMU regs"
watchdog: rzg2l_wdt: Power on the watchdog domain in the restart handler
watchdog: Switch back to struct platform_driver::remove()
watchdog: it87_wdt: add PWRGD enable quirk for Qotom QCML04
watchdog: da9063: Remove __maybe_unused notations
watchdog: da9063: Do not use a global variable
watchdog: Delete the cpu5wdt driver
watchdog: Add support for Airoha EN7851 watchdog
dt-bindings: watchdog: airoha: document watchdog for Airoha EN7581
watchdog: sl28cpld_wdt: don't print out if registering watchdog fails
watchdog: rza_wdt: don't print out if registering watchdog fails
watchdog: rti_wdt: don't print out if registering watchdog fails
...

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watchdog: Delete the cpu5wdt driver

This driver has a number of issues (accesses arbitrary I/O ports
without identifying the hardware, doesn't document what hardware it
supports, suspiciously incons

watchdog: Delete the cpu5wdt driver

This driver has a number of issues (accesses arbitrary I/O ports
without identifying the hardware, doesn't document what hardware it
supports, suspiciously inconsistent locking model, doesn't implement
WDIOC_SETTIMEOUT, potential integer overflow...)

The driver was added in 2003 and there's no evidence that it has any
recent user, all changes seem to be tree-wide, subsystem-wide, or the
result of static code analysis. So I believe we should simply drop
this legacy piece of code.

Signed-off-by: Jean Delvare <jdelvare@suse.de>
Message-ID: <20241011170710.484a257a@endymion.delvare>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20241022114731.31f69c94@endymion.delvare
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>

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watchdog: Add support for Airoha EN7851 watchdog

Add support for Airoha EN7851 watchdog. This is a very basic watchdog
with no pretimeout support, max timeout is 28 seconds and it ticks based
on hal

watchdog: Add support for Airoha EN7851 watchdog

Add support for Airoha EN7851 watchdog. This is a very basic watchdog
with no pretimeout support, max timeout is 28 seconds and it ticks based
on half the SoC BUS clock.

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20241011104411.28659-2-ansuelsmth@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>

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watchdog: Congatec Board Controller watchdog timer driver

Add watchdog timer support for the Congatec Board Controller.

Acked-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Thomas Richard <t

watchdog: Congatec Board Controller watchdog timer driver

Add watchdog timer support for the Congatec Board Controller.

Acked-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Thomas Richard <thomas.richard@bootlin.com>
Link: https://lore.kernel.org/r/20241001-congatec-board-controller-v3-4-39ceceed5c47@bootlin.com
Signed-off-by: Lee Jones <lee@kernel.org>

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watchdog: Add Watchdog Timer driver for RZ/V2H(P)

Add Watchdog Timer driver for RZ/V2H(P) SoC.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Guenter Roeck <lin

watchdog: Add Watchdog Timer driver for RZ/V2H(P)

Add Watchdog Timer driver for RZ/V2H(P) SoC.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20240829193831.80768-3-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>

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watchdog: ROHM BD96801 PMIC WDG driver

Introduce driver for WDG block on ROHM BD96801 scalable PMIC.

This driver only supports watchdog with I2C feeding and delayed
response detection. Whether the

watchdog: ROHM BD96801 PMIC WDG driver

Introduce driver for WDG block on ROHM BD96801 scalable PMIC.

This driver only supports watchdog with I2C feeding and delayed
response detection. Whether the watchdog toggles PRSTB pin or
just causes an interrupt can be configured via device-tree.

The BD96801 PMIC HW supports also window watchdog (too early
feeding detection) and Q&A mode. These are not supported by
this driver.

Signed-off-by: Matti Vaittinen <mazziesaccount@gmail.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/bb3a49d606e793a61b0c033170ff2a9f30f3c2a5.1719473802.git.mazziesaccount@gmail.com
Signed-off-by: Lee Jones <lee@kernel.org>

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watchdog: lenovo_se10_wdt: Watchdog driver for Lenovo SE10 platform

Watchdog driver implementation for Lenovo SE10 platform.

Signed-off-by: Mark Pearson <mpearson-lenovo@squebb.ca>
Signed-off-by: D

watchdog: lenovo_se10_wdt: Watchdog driver for Lenovo SE10 platform

Watchdog driver implementation for Lenovo SE10 platform.

Signed-off-by: Mark Pearson <mpearson-lenovo@squebb.ca>
Signed-off-by: David Ober <dober@lenovo.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20240315195227.91282-1-mpearson-lenovo@squebb.ca
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>

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watchdog: Add ChromeOS EC-based watchdog driver

Embedded Controller (EC) present on Chromebook devices
can be used as a watchdog.
Implement a driver to support it.

Signed-off-by: Lukasz Majczak <lm

watchdog: Add ChromeOS EC-based watchdog driver

Embedded Controller (EC) present on Chromebook devices
can be used as a watchdog.
Implement a driver to support it.

Signed-off-by: Lukasz Majczak <lma@chromium.org>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20240126095721.782782-3-lma@chromium.org
Signed-off-by: Lee Jones <lee@kernel.org>

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watchdog: ar7_wdt: remove driver to prepare for platform removal

AR7 is going to be removed from the Kernel, so remove its watchdog
support. This allows us to remove the platform because this driver

watchdog: ar7_wdt: remove driver to prepare for platform removal

AR7 is going to be removed from the Kernel, so remove its watchdog
support. This allows us to remove the platform because this driver
includes a platform specific header.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

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Watchdog: Add marvell GTI watchdog driver

This patch add support for Marvell GTI watchdog. Global timer
unit (GTI) support hardware watchdog timer. Software programs
watchdog timer to generate inte

Watchdog: Add marvell GTI watchdog driver

This patch add support for Marvell GTI watchdog. Global timer
unit (GTI) support hardware watchdog timer. Software programs
watchdog timer to generate interrupt on first timeout, second
timeout is configured to be ignored and system reboots on
third timeout.

Signed-off-by: Bharat Bhushan <bbhushan2@marvell.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20230803032523.6242-2-bbhushan2@marvell.com
[groeck: MODULE_LICENSE GPL v2 -> GPL since that is sufficient]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>

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watchdog: xilinx_wwdt: Add Versal window watchdog support

Versal watchdog driver uses window watchdog mode. Window watchdog
timer(WWDT) contains closed(first) and open(second) window with
32 bit wid

watchdog: xilinx_wwdt: Add Versal window watchdog support

Versal watchdog driver uses window watchdog mode. Window watchdog
timer(WWDT) contains closed(first) and open(second) window with
32 bit width. Write to the watchdog timer within predefined window
periods of time. This means a period that is not too soon and a
period that is not too late. The WWDT has to be restarted within
the open window time. If software tries to restart WWDT outside of
the open window time period, it generates a reset.

Signed-off-by: Srinivas Neeli <srinivas.neeli@amd.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lkml.kernel.org/r/20230420104231.2243079-4-srinivas.neeli@amd.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>

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drivers: watchdog: Add StarFive Watchdog driver

Add watchdog driver for the StarFive JH7100 and JH7110 SoC.

Signed-off-by: Xingyu Wu <xingyu.wu@starfivetech.com>
Reviewed-by: Emil Renner Berthing <

drivers: watchdog: Add StarFive Watchdog driver

Add watchdog driver for the StarFive JH7100 and JH7110 SoC.

Signed-off-by: Xingyu Wu <xingyu.wu@starfivetech.com>
Reviewed-by: Emil Renner Berthing <emil.renner.berthing@canonical.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20230314132437.121534-3-xingyu.wu@starfivetech.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>

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watchdog: Add Advantech EC watchdog driver

This patch adds the 'advantech_ec_wdt' kernel module which provides
WDT support for Advantech platforms with ITE based Embedded Controller.

Signed-off-by:

watchdog: Add Advantech EC watchdog driver

This patch adds the 'advantech_ec_wdt' kernel module which provides
WDT support for Advantech platforms with ITE based Embedded Controller.

Signed-off-by: Thomas Kastner <thomas.kastner@advantech.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Tested-by: Thomas Kastner <thomas.kastner@advantech.com>
Link: https://lore.kernel.org/r/Y0+pl/26e3pcEUPk@EIS-S230
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>

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watchdog: Exar/MaxLinear XR28V38x driver

Simple driver for the watchdog present in some Exar/MaxLinear UART chips.
Please see https://www.maxlinear.com/product/interface/uarts/lpc-uarts/xr28v384
for

watchdog: Exar/MaxLinear XR28V38x driver

Simple driver for the watchdog present in some Exar/MaxLinear UART chips.
Please see https://www.maxlinear.com/product/interface/uarts/lpc-uarts/xr28v384
for more info.

Signed-off-by: David Müller <d.mueller@elsoft.ch>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20220914094605.93377-1-d.mueller@elsoft.ch
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>

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watchdog/pseries-wdt: initial support for H_WATCHDOG-based watchdog timers

PAPR v2.12 defines a new hypercall, H_WATCHDOG. The hypercall permits
guest control of one or more virtual watchdog timers

watchdog/pseries-wdt: initial support for H_WATCHDOG-based watchdog timers

PAPR v2.12 defines a new hypercall, H_WATCHDOG. The hypercall permits
guest control of one or more virtual watchdog timers. The timers have
millisecond granularity. The guest is terminated when a timer
expires.

This patch adds a watchdog driver for these timers, "pseries-wdt".

pseries_wdt_probe() currently assumes the existence of only one
platform device and always assigns it watchdogNumber 1. If we ever
expose more than one timer to userspace we will need to devise a way
to assign a distinct watchdogNumber to each platform device at device
registration time.

Signed-off-by: Scott Cheloha <cheloha@linux.ibm.com>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220713202335.1217647-5-cheloha@linux.ibm.com

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