linux-toradex.git/drivers/watchdog, branch v6.19

Merge tag 'linux-watchdog-6.19-rc1' of git://www.linux-watchdog.org/linux-watchdog

2025-12-06T18:00:49+00:00

Pull watchdog updates from Wim Van Sebroeck:

 - Add watchdog support for:
     - Renesas WWDT
     - AST2700 platform
     - MediaTek MT8189 SoC
     - Loongson-2k0300 watchdog
     - Qualcomm Kaanapali watchdog
     - RK3506 compatible
     - Airoha AN7583 SoC

 - DT Schema conversions:
     - lantiq,wdt
     - TI OMAP
     - marvell,orion-wdt

 - Several other fixes and improvements

* tag 'linux-watchdog-6.19-rc1' of git://www.linux-watchdog.org/linux-watchdog: (30 commits)
  watchdog: starfive: Fix resource leak in probe error path
  dt-bindings: watchdog: airoha: Add support for Airoha AN7583 SoC
  dt-bindings: watchdog: lantiq,wdt: convert bindings to dtschema
  dt-bindings: watchdog: Add RK3506 compatible
  dt-bindings: watchdog: Document Qualcomm Kaanapali watchdog
  watchdog: wdat_wdt: Fix ACPI table leak in probe function
  watchdog: loongson1: Add Loongson-2k0300 watchdog support
  dt-bindings: watchdog: loongson,ls1x-wdt: Add ls2k0300-wdt compatible
  watchdog: loongson1: Drop CONFIG_OF
  watchdog: loongson1: Simplify ls1x_wdt_probe code
  watchdog: loongson1: Add missing MODULE_PARM_DESC
  watchdog/diag288: Fix module comment typos
  dt-bindings: watchdog: Support MediaTek MT8189 wdt
  dt-bindings: watchdog: mediatek,mtk-wdt: Add compatible for MT8189 SoC
  dt-bindings: mfd: rohm,bd96801-pmic: Correct timeout-sec length and reference watchdog schema
  dt-bindings: watchdog: Allow node names named 'pmic'
  dt-bindings: watchdog: Restrict timeout-sec to one number
  watchdog: renesas_wwdt: add driver
  dt-bindings: watchdog: Add Renesas WWDT
  dt-bindings: watchdog: Convert marvell,orion-wdt to DT schema
  ...

watchdog: diag288_wdt: Remove KMSG_COMPONENT macro

2025-11-26T16:34:52+00:00

The KMSG_COMPONENT macro is a leftover of the s390 specific "kernel message
catalog" from 2008 [1] which never made it upstream.

The macro was added to s390 code to allow for an out-of-tree patch which
used this to generate unique message ids. Also this out-of-tree doesn't
exist anymore.

Remove the macro in order to get rid of a pointless indirection.

[1] https://lwn.net/Articles/292650/

Reviewed-by: Guenter Roeck 
Signed-off-by: Heiko Carstens

watchdog: starfive: Fix resource leak in probe error path

2025-11-15T14:29:01+00:00

If pm_runtime_put_sync() fails after watchdog_register_device()
succeeds, the probe function jumps to err_exit without
unregistering the watchdog device. This leaves the watchdog
registered in the subsystem while the driver fails to load,
resulting in a resource leak.

Add a new error label err_unregister_wdt to properly unregister
the watchdog device.

Fixes: 8bc22a2f1bf0 ("watchdog: starfive: Check pm_runtime_enabled() before decrementing usage counter")
Signed-off-by: Haotian Zhang 
Reviewed-by: Wim Van Sebroeck 
Signed-off-by: Guenter Roeck 
Signed-off-by: Wim Van Sebroeck

watchdog: wdat_wdt: Fix ACPI table leak in probe function

2025-11-15T14:28:10+00:00

wdat_wdt_probe() calls acpi_get_table() to obtain the WDAT ACPI table but
never calls acpi_put_table() on any paths. This causes a permanent ACPI
table memory leak.

Add a single cleanup path which calls acpi_put_table() to ensure
the ACPI table is always released.

Fixes: 058dfc767008 ("ACPI / watchdog: Add support for WDAT hardware watchdog")
Suggested-by: Guenter Roeck 
Signed-off-by: Haotian Zhang 
Reviewed-by: Guenter Roeck 
Signed-off-by: Guenter Roeck 
Signed-off-by: Wim Van Sebroeck

watchdog: loongson1: Add Loongson-2k0300 watchdog support

2025-11-15T14:28:10+00:00

According to the manual, the Loongson-2K0300 watchdog is similar to the
Loongson-1, except for some register offsets and inconsistent register
bit definitions. Separate definitions via driver_data suffice.

Co-developed-by: Xiaochuang Mao 
Signed-off-by: Xiaochuang Mao 
Signed-off-by: Binbin Zhou 
Reviewed-by: Huacai Chen 
Reviewed-by: Guenter Roeck 
Signed-off-by: Guenter Roeck 
Signed-off-by: Wim Van Sebroeck

watchdog: loongson1: Drop CONFIG_OF

2025-11-15T14:28:09+00:00

The general recommendation is to not use of_match_ptr() or CONFIG_OF
ifdef.

Drop them.

Signed-off-by: Binbin Zhou 
Reviewed-by: Guenter Roeck 
Signed-off-by: Guenter Roeck 
Signed-off-by: Wim Van Sebroeck

watchdog: loongson1: Simplify ls1x_wdt_probe code

2025-11-15T14:28:09+00:00

Remove meaningless output to simplify ls1x_wdt_probe().

Signed-off-by: Binbin Zhou 
Reviewed-by: Guenter Roeck 
Signed-off-by: Guenter Roeck 
Signed-off-by: Wim Van Sebroeck

watchdog: loongson1: Add missing MODULE_PARM_DESC

2025-11-15T14:28:08+00:00

Add documentation for module_param so that they're visible with
modinfo command.

Signed-off-by: Binbin Zhou 
Reviewed-by: Guenter Roeck 
Signed-off-by: Guenter Roeck 
Signed-off-by: Wim Van Sebroeck

watchdog/diag288: Fix module comment typos

2025-11-15T14:28:08+00:00

Correct spelling and capitalizaion in the header comment so the
documentation reads cleanly.

Signed-off-by: Zoe Gates 
Reviewed-by: Guenter Roeck 
Signed-off-by: Guenter Roeck 
Signed-off-by: Wim Van Sebroeck

watchdog: renesas_wwdt: add driver

2025-11-15T14:19:55+00:00

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 
Reviewed-by: Guenter Roeck 
Signed-off-by: Guenter Roeck 
Signed-off-by: Wim Van Sebroeck