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2026-02-21Convert 'alloc_obj' family to use the new default GFP_KERNEL argumentLinus Torvalds-6/+6
This was done entirely with mindless brute force, using git grep -l '\<k[vmz]*alloc_objs*(.*, GFP_KERNEL)' | xargs sed -i 's/\(alloc_objs*(.*\), GFP_KERNEL)/\1)/' to convert the new alloc_obj() users that had a simple GFP_KERNEL argument to just drop that argument. Note that due to the extreme simplicity of the scripting, any slightly more complex cases spread over multiple lines would not be triggered: they definitely exist, but this covers the vast bulk of the cases, and the resulting diff is also then easier to check automatically. For the same reason the 'flex' versions will be done as a separate conversion. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2026-02-21treewide: Replace kmalloc with kmalloc_obj for non-scalar typesKees Cook-6/+6
This is the result of running the Coccinelle script from scripts/coccinelle/api/kmalloc_objs.cocci. The script is designed to avoid scalar types (which need careful case-by-case checking), and instead replace kmalloc-family calls that allocate struct or union object instances: Single allocations: kmalloc(sizeof(TYPE), ...) are replaced with: kmalloc_obj(TYPE, ...) Array allocations: kmalloc_array(COUNT, sizeof(TYPE), ...) are replaced with: kmalloc_objs(TYPE, COUNT, ...) Flex array allocations: kmalloc(struct_size(PTR, FAM, COUNT), ...) are replaced with: kmalloc_flex(*PTR, FAM, COUNT, ...) (where TYPE may also be *VAR) The resulting allocations no longer return "void *", instead returning "TYPE *". Signed-off-by: Kees Cook <kees@kernel.org>
2026-02-16Merge tag 'linux-watchdog-6.20-rc1' of ↵Linus Torvalds-296/+36
git://www.linux-watchdog.org/linux-watchdog Pull watchdog updates from Wim Van Sebroeck: - iTCO: Drop vendor support - s3c2410_wdt: Drop S3C2410 support - Convert mpc8xxx-wdt to YAML - Several small fixes and improvements * tag 'linux-watchdog-6.20-rc1' of git://www.linux-watchdog.org/linux-watchdog: dt-bindings: watchdog: qcom-wdt: Document Glymur watchdog dt-bindings: watchdog: Convert mpc8xxx-wdt to YAML dt-bindings: watchdog: samsung-wdt: Split if:then: and constrain more dt-bindings: watchdog: samsung-wdt: Drop S3C2410 watchdog: s3c2410_wdt: Drop S3C2410 support dt-bindings: watchdog: samsung-wdt: Define cluster constraints top-level watchdog: rzv2h_wdt: Discard pm_runtime_put() return value watchdog: rz: Discard pm_runtime_put() return values watchdog: Make API functions const correct watchdog: imx7ulp_wdt: handle the nowayout option watchdog: sbsa: Update the W_IIDR Implementer bit mask to 0xFFF watchdog: Always return time left until watchdog times out watchdog: iTCO: Drop vendor support watchdog: starfive-wdt: Fix PM reference leak in probe error path fix it87_wdt early reboot by reporting running timer
2026-02-16Merge tag 'mips_7.0' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linuxLinus Torvalds-4/+2
Pull MIPS updates from Thomas Bogendoerfer: "Cleanups and fixes" * tag 'mips_7.0' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux: (28 commits) Revert "clk: microchip: core: allow driver to be compiled with COMPILE_TEST" Revert "clk: microchip: fix typo in reference to a config option" MIPS: Implement ARCH_HAS_CC_CAN_LINK MIPS: rb532: Fix MMIO UART resource registration MIPS: Work around LLVM bug when gp is used as global register variable MIPS: Loongson64: env: Fixup serial clock-frequency when using LEFI MIPS: Loongson2ef: Use pcibios_align_resource() to block io range MIPS: Loongson2ef: Register PCI controller in early stage clk: microchip: fix typo in reference to a config option MIPS: Loongson64: dts: fix phy-related definition of LS7A GMAC clk: microchip: core: allow driver to be compiled with COMPILE_TEST MIPS: drop unused pic32.h header watchdog: pic32-wdt: update include to use pic32.h from platform_data watchdog: pic32-dmt: update include to use pic32.h from platform_data serial: pic32_uart: update include to use pic32.h from platform_data rtc: pic32: update include to use pic32.h from platform_data pinctrl: pic32: update include to use pic32.h from platform_data mmc: sdhci-pic32: update include to use pic32.h from platform_data irqchip/irq-pic32-evic: update include to use pic32.h from platform_data clk: microchip: core: update include to use pic32.h from platform_data ...
2026-02-12Merge tag 'mm-nonmm-stable-2026-02-12-10-48' of ↵Linus Torvalds-0/+1
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Pull non-MM updates from Andrew Morton: - "ocfs2: give ocfs2 the ability to reclaim suballocator free bg" saves disk space by teaching ocfs2 to reclaim suballocator block group space (Heming Zhao) - "Add ARRAY_END(), and use it to fix off-by-one bugs" adds the ARRAY_END() macro and uses it in various places (Alejandro Colomar) - "vmcoreinfo: support VMCOREINFO_BYTES larger than PAGE_SIZE" makes the vmcore code future-safe, if VMCOREINFO_BYTES ever exceeds the page size (Pnina Feder) - "kallsyms: Prevent invalid access when showing module buildid" cleans up kallsyms code related to module buildid and fixes an invalid access crash when printing backtraces (Petr Mladek) - "Address page fault in ima_restore_measurement_list()" fixes a kexec-related crash that can occur when booting the second-stage kernel on x86 (Harshit Mogalapalli) - "kho: ABI headers and Documentation updates" updates the kexec handover ABI documentation (Mike Rapoport) - "Align atomic storage" adds the __aligned attribute to atomic_t and atomic64_t definitions to get natural alignment of both types on csky, m68k, microblaze, nios2, openrisc and sh (Finn Thain) - "kho: clean up page initialization logic" simplifies the page initialization logic in kho_restore_page() (Pratyush Yadav) - "Unload linux/kernel.h" moves several things out of kernel.h and into more appropriate places (Yury Norov) - "don't abuse task_struct.group_leader" removes the usage of ->group_leader when it is "obviously unnecessary" (Oleg Nesterov) - "list private v2 & luo flb" adds some infrastructure improvements to the live update orchestrator (Pasha Tatashin) * tag 'mm-nonmm-stable-2026-02-12-10-48' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (107 commits) watchdog/hardlockup: simplify perf event probe and remove per-cpu dependency procfs: fix missing RCU protection when reading real_parent in do_task_stat() watchdog/softlockup: fix sample ring index wrap in need_counting_irqs() kcsan, compiler_types: avoid duplicate type issues in BPF Type Format kho: fix doc for kho_restore_pages() tests/liveupdate: add in-kernel liveupdate test liveupdate: luo_flb: introduce File-Lifecycle-Bound global state liveupdate: luo_file: Use private list list: add kunit test for private list primitives list: add primitives for private list manipulations delayacct: fix uapi timespec64 definition panic: add panic_force_cpu= parameter to redirect panic to a specific CPU netclassid: use thread_group_leader(p) in update_classid_task() RDMA/umem: don't abuse current->group_leader drm/pan*: don't abuse current->group_leader drm/amd: kill the outdated "Only the pthreads threading model is supported" checks drm/amdgpu: don't abuse current->group_leader android/binder: use same_thread_group(proc->tsk, current) in binder_mmap() android/binder: don't abuse current->group_leader kho: skip memoryless NUMA nodes when reserving scratch areas ...
2026-01-30watchdog: pic32-wdt: update include to use pic32.h from platform_dataBrian Masney-2/+1
Use the linux/platform_data/pic32.h include instead of asm/mach-pic32/pic32.h so that the asm variant can be dropped. This is in preparation for allowing some drivers to be compiled on other architectures with COMPILE_TEST enabled. Acked-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Brian Masney <bmasney@redhat.com> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2026-01-30watchdog: pic32-dmt: update include to use pic32.h from platform_dataBrian Masney-2/+1
Use the linux/platform_data/pic32.h include instead of asm/mach-pic32/pic32.h so that the asm variant can be dropped. This is in preparation for allowing some drivers to be compiled on other architectures with COMPILE_TEST enabled. Acked-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Brian Masney <bmasney@redhat.com> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2026-01-20kernel.h: drop hex.h and update all hex.h usersRandy Dunlap-0/+1
Remove <linux/hex.h> from <linux/kernel.h> and update all users/callers of hex.h interfaces to directly #include <linux/hex.h> as part of the process of putting kernel.h on a diet. Removing hex.h from kernel.h means that 36K C source files don't have to pay the price of parsing hex.h for the roughly 120 C source files that need it. This change has been build-tested with allmodconfig on most ARCHes. Also, all users/callers of <linux/hex.h> in the entire source tree have been updated if needed (if not already #included). Link: https://lkml.kernel.org/r/20251215005206.2362276-1-rdunlap@infradead.org Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Yury Norov (NVIDIA) <yury.norov@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2026-01-18watchdog: s3c2410_wdt: Drop S3C2410 supportKrzysztof Kozlowski-21/+1
Samsung S3C2410 SoC was removed from Linux kernel in the commit 61b7f8920b17 ("ARM: s3c: remove all s3c24xx support"), in January 2023. There are no in-kernel users of samsung,s3c2410-wdt compatible and s3c2410-wdt platform device name, so drop both. This leaves the driver boundable only via compatibles, so drop any CONFIG_OF ifdefs. Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.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>
2026-01-18watchdog: rzv2h_wdt: Discard pm_runtime_put() return valueRafael J. Wysocki-3/+1
Failing device probe due to pm_runtime_put() returning an error is not particularly useful. Returning an error code from pm_runtime_put() merely means that it has not queued up a work item to check whether or not the device can be suspended and there are many perfectly valid situations in which that can happen, like after writing "on" to the devices' runtime PM "control" attribute in sysfs for one example. It also happens when the kernel is configured with CONFIG_PM unset. Accordingly, update rzt2h_wdt_wdtdcr_init() to simply discard the return value of pm_runtime_put() and return success to the caller after invoking that function. This will facilitate a planned change of the pm_runtime_put() return type to void in the future. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.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>
2026-01-18watchdog: rz: Discard pm_runtime_put() return valuesRafael J. Wysocki-6/+2
Failing a watchdog stop due to pm_runtime_put() returning a negative value is not particularly useful. Returning an error code from pm_runtime_put() merely means that it has not queued up a work item to check whether or not the device can be suspended and there are many perfectly valid situations in which that can happen, like after writing "on" to the devices' runtime PM "control" attribute in sysfs for one example. It also happens when the kernel is configured with CONFIG_PM unset. Accordingly, update rzg2l_wdt_stop() and rzv2h_wdt_stop() to simply discard the return value of pm_runtime_put(). This will facilitate a planned change of the pm_runtime_put() return type to void in the future. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.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>
2026-01-18watchdog: Make API functions const correctKari Argillander-1/+2
Many watchdog API functions do not modify the watchdog_device nor device. Mark their arguments as const to reflect this and improve const-correctness of the API. No functional change intended. Signed-off-by: Kari Argillander <kari.argillander@gmail.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>
2026-01-18watchdog: imx7ulp_wdt: handle the nowayout optionOleksandr Suvorov-0/+1
The module parameter `nowayout` indicates whether the watchdog should ever be allowed to stop, but the driver currently ignores this option. Pass the `nowayout` parameter to the watchdog core by setting the WDOG_NO_WAY_OUT flag accordingly. Signed-off-by: Oleksandr Suvorov <cryosay@gmail.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Reviewed-by: Frank Li <Frank.Li@nxp.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
2026-01-18watchdog: sbsa: Update the W_IIDR Implementer bit mask to 0xFFFNaina Mehta-2/+2
The implementer mask defined in the driver [1] captures bits 0-10, whereas section C.4.2 of BSA specification [2] indicates that bits 0-11 of the W_IIDR register represent the implementer JEP106 code. Update the SBSA_GWDT_IMPL_MASK corresponding to bits 0-11, while at it update SBSA_GWDT_VERSION_MASK mask to use GENMASK. [1] #define SBSA_GWDT_IMPL_MASK 0x7FF [2] Implementer, bits [11:0] Contains the JEP106 code of the company that implemented the Generic Watchdog: Bits[11:8] The JEP106 continuation code of the implementer. Bit[7] Always 0 Bits [6:0] The JEP106 identity code of the implementer. Signed-off-by: Naina Mehta <naina.mehta@oss.qualcomm.com> Acked-by: Aaron Plattner <aplattner@nvidia.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>
2026-01-18watchdog: Always return time left until watchdog times outGuenter Roeck-20/+15
The watchdog core knows when the most recent keepalive was sent. It also knows the configured timeout. With that, it can always calculate and return the time left until a watchdog times out, even if its driver does not support it. Convert watchdog_get_timeleft() into a void function. It never returns an error after this patch is applied, so the error checks in the calling code are now pointless and can be removed. 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>
2026-01-18watchdog: iTCO: Drop vendor supportGuenter Roeck-251/+2
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>
2026-01-17watchdog: starfive-wdt: Fix PM reference leak in probe error pathKery Qi-1/+1
The PM reference count is not expected to be incremented on return in functions starfive_wdt_probe. However, pm_runtime_get_sync will increment pm usage counter even failed. Forgetting to putting operation will result in a reference leak here. Replace it with pm_runtime_resume_and_get to keep usage counter balanced. Fixes: db728ea9c7be ("drivers: watchdog: Add StarFive Watchdog driver") Signed-off-by: Kery Qi <qikeyu2017@gmail.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>
2026-01-17fix it87_wdt early reboot by reporting running timerRené Rebe-0/+12
Some products, such as the Ugreen DXP4800 Plus NAS, ship with the it87 wdt enabled by the firmware and a broken BIOS option that does not allow to change the time or turn it off. As this makes installing Linux rather difficult, change the it87_wdt to report it running to the watchdog core. Signed-off-by: René Rebe <rene@exactco.de> 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>
2026-01-08watchdog: rzv2h_wdt: Discard pm_runtime_put() return valueRafael J. Wysocki-3/+1
Failing device probe due to pm_runtime_put() returning an error is not particularly useful. Returning an error code from pm_runtime_put() merely means that it has not queued up a work item to check whether or not the device can be suspended and there are many perfectly valid situations in which that can happen, like after writing "on" to the devices' runtime PM "control" attribute in sysfs for one example. It also happens when the kernel is configured with CONFIG_PM unset. Accordingly, update rzt2h_wdt_wdtdcr_init() to simply discard the return value of pm_runtime_put() and return success to the caller after invoking that function. This will facilitate a planned change of the pm_runtime_put() return type to void in the future. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Link: https://patch.msgid.link/1867890.VLH7GnMWUR@rafael.j.wysocki
2026-01-08watchdog: rz: Discard pm_runtime_put() return valuesRafael J. Wysocki-6/+2
Failing a watchdog stop due to pm_runtime_put() returning a negative value is not particularly useful. Returning an error code from pm_runtime_put() merely means that it has not queued up a work item to check whether or not the device can be suspended and there are many perfectly valid situations in which that can happen, like after writing "on" to the devices' runtime PM "control" attribute in sysfs for one example. It also happens when the kernel is configured with CONFIG_PM unset. Accordingly, update rzg2l_wdt_stop() and rzv2h_wdt_stop() to simply discard the return value of pm_runtime_put(). This will facilitate a planned change of the pm_runtime_put() return type to void in the future. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Link: https://patch.msgid.link/3340071.5fSG56mABF@rafael.j.wysocki
2025-12-06Merge tag 'linux-watchdog-6.19-rc1' of ↵Linus Torvalds-58/+312
git://www.linux-watchdog.org/linux-watchdog 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 ...
2025-11-26watchdog: diag288_wdt: Remove KMSG_COMPONENT macroHeiko Carstens-2/+1
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 <linux@roeck-us.net> Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2025-11-15watchdog: starfive: Fix resource leak in probe error pathHaotian Zhang-1/+3
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 <vulab@iscas.ac.cn> Reviewed-by: Wim Van Sebroeck <wim@linux-watchdog.org> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
2025-11-15watchdog: wdat_wdt: Fix ACPI table leak in probe functionHaotian Zhang-21/+43
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 <linux@roeck-us.net> Signed-off-by: Haotian Zhang <vulab@iscas.ac.cn> 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>
2025-11-15watchdog: loongson1: Add Loongson-2k0300 watchdog supportBinbin Zhou-15/+62
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 <maoxiaochuan@loongson.cn> Signed-off-by: Xiaochuang Mao <maoxiaochuan@loongson.cn> Signed-off-by: Binbin Zhou <zhoubinbin@loongson.cn> Reviewed-by: Huacai Chen <chenhuacai@loongson.cn> 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>
2025-11-15watchdog: loongson1: Drop CONFIG_OFBinbin Zhou-3/+1
The general recommendation is to not use of_match_ptr() or CONFIG_OF ifdef. Drop them. Signed-off-by: Binbin Zhou <zhoubinbin@loongson.cn> 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>
2025-11-15watchdog: loongson1: Simplify ls1x_wdt_probe codeBinbin Zhou-10/+2
Remove meaningless output to simplify ls1x_wdt_probe(). Signed-off-by: Binbin Zhou <zhoubinbin@loongson.cn> 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>
2025-11-15watchdog: loongson1: Add missing MODULE_PARM_DESCBinbin Zhou-2/+6
Add documentation for module_param so that they're visible with modinfo command. Signed-off-by: Binbin Zhou <zhoubinbin@loongson.cn> 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>
2025-11-15watchdog/diag288: Fix module comment typosZoe Gates-3/+3
Correct spelling and capitalizaion in the header comment so the documentation reads cleanly. Signed-off-by: Zoe Gates <zoe@zeocities.dev> 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>
2025-11-15watchdog: renesas_wwdt: add driverWolfram Sang-0/+172
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>
2025-11-15watchdog: aspeed: Add support for AST2700 platformChin-Ting Kuo-1/+15
Add AST2700 platform support to the ASPEED watchdog driver. This includes a new per-platform configuration with SCU reset status register at SCU1_070 and support for 5 reset mask registers. Signed-off-by: Chin-Ting Kuo <chin-ting_kuo@aspeedtech.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>
2025-11-15watchdog: aspeed: Support variable number of reset mask registersChin-Ting Kuo-6/+8
Starting from the AST2600 platform, the SoC design has become more complex, with an increased number of reset mask registers. To support this, introduce a new field 'num_reset_masks' in the 'aspeed_wdt_config' structure to specify the number of reset mask registers per platform. This change removes the need for hardcoded platform-specific logic and improves scalability for future SoCs. Signed-off-by: Chin-Ting Kuo <chin-ting_kuo@aspeedtech.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>
2025-11-15via_wdt: fix critical boot hang due to unnamed resource allocationLi Qiang-0/+1
The VIA watchdog driver uses allocate_resource() to reserve a MMIO region for the watchdog control register. However, the allocated resource was not given a name, which causes the kernel resource tree to contain an entry marked as "<BAD>" under /proc/iomem on x86 platforms. During boot, this unnamed resource can lead to a critical hang because subsequent resource lookups and conflict checks fail to handle the invalid entry properly. Signed-off-by: Li Qiang <liqiang01@kylinos.cn> 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>
2025-10-06Merge tag 'linux-watchdog-6.18-rc1' of ↵Linus Torvalds-43/+172
git://www.linux-watchdog.org/linux-watchdog Pull watchdog updates from Wim Van Sebroeck: - renesas,wdt: Add support for RZ/T2H and RZ/N2H - Add SMARC-sAM67 support - Several small fixes and improvements * tag 'linux-watchdog-6.18-rc1' of git://www.linux-watchdog.org/linux-watchdog: watchdog/hpwdt New maintianer dt-bindings: watchdog: add SMARC-sAM67 support watchdog: mpc8xxx_wdt: Reload the watchdog timer when enabling the watchdog watchdog: visconti: don't print superfluous errors watchdog: rzv2h_wdt: don't print superfluous errors watchdog: rzg2l_wdt: don't print superfluous errors watchdog: s3c2410_wdt: exynosautov9: Enable supported features watchdog: s3c2410_wdt: exynosautov920: Enable QUIRK_HAS_32BIT_CNT watchdog: s3c2410_wdt: Increase max timeout value of watchdog watchdog: s3c2410_wdt: Fix max_timeout being calculated larger watchdog: s3c2410_wdt: Replace hardcoded values with macro definitions watchdog: rzv2h: Improve error strings and add newlines watchdog: rzv2h: Add support for RZ/T2H watchdog: rzv2h: Add support for configurable count clock source watchdog: rzv2h: Make "oscclk" and reset controller optional watchdog: rzv2h: Obtain clock-divider and timeout values from OF match data dt-bindings: watchdog: renesas,wdt: Add support for RZ/T2H and RZ/N2H watchdog: intel_oc_wdt: Do not try to write into const memory
2025-09-16watchdog: Add Nuvoton NCT6694 WDT supportMing Yu-0/+319
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>
2025-09-12watchdog: mpc8xxx_wdt: Reload the watchdog timer when enabling the watchdogChristophe Leroy-0/+2
When the watchdog gets enabled with this driver, it leaves enough time for the core watchdog subsystem to start pinging it. But when the watchdog is already started by hardware or by the boot loader, little time remains before it fires and it happens that the core watchdog subsystem doesn't have time to start pinging it. Until commit 19ce9490aa84 ("watchdog: mpc8xxx: use the core worker function") pinging was managed by the driver itself and the watchdog was immediately pinged by setting the timer expiry to 0. So restore similar behaviour by pinging it when enabling it so that if it was already enabled the watchdog timer counter is reloaded. Fixes: 19ce9490aa84 ("watchdog: mpc8xxx: use the core worker function") Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> 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>
2025-09-12watchdog: visconti: don't print superfluous errorsWolfram Sang-4/+1
The watchdog core will handle error messages already. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Reviewed-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.x90@mail.toshiba> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
2025-09-12watchdog: rzv2h_wdt: don't print superfluous errorsWolfram Sang-3/+1
The watchdog core will handle error messages already. 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>
2025-09-12watchdog: rzg2l_wdt: don't print superfluous errorsWolfram Sang-3/+1
The watchdog core will handle error messages already. 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>
2025-09-12watchdog: s3c2410_wdt: exynosautov9: Enable supported featuresSangwook Shin-2/+4
Enable supported features for ExynosAutov9 SoC. - QUIRK_HAS_DBGACK_BIT - QUIRK_HAS_32BIT_CNT Reviewed-by: Sam Protsenko <semen.protsenko@linaro.org> Signed-off-by: Sangwook Shin <sw617.shin@samsung.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>
2025-09-12watchdog: s3c2410_wdt: exynosautov920: Enable QUIRK_HAS_32BIT_CNTSangwook Shin-2/+2
Enable QUIRK_HAS_32BIT_CNT to ExynosAutov920 SoC which has 32-bit WTCNT. Reviewed-by: Sam Protsenko <semen.protsenko@linaro.org> Signed-off-by: Sangwook Shin <sw617.shin@samsung.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>
2025-09-12watchdog: s3c2410_wdt: Increase max timeout value of watchdogSangwook Shin-7/+19
Increase max_timeout value from 55s to 3665038s (1018h 3min 58s) with 38400000 frequency system if the system has 32-bit WTCNT register. cat /sys/class/watchdog/watchdog0/max_timeout 3665038 [ 0.330082] s3c2410-wdt 10060000.watchdog_cl0: Heartbeat: count=1099511400000, timeout=3665038, freq=300000 [ 0.330087] s3c2410-wdt 10060000.watchdog_cl0: Heartbeat: timeout=3665038, divisor=256, count=1099511400000 (fffffc87) [ 0.330127] s3c2410-wdt 10060000.watchdog_cl0: starting watchdog timer [ 0.330134] s3c2410-wdt 10060000.watchdog_cl0: Starting watchdog: count=0xfffffc87, wtcon=0001ff39 [ 0.330319] s3c2410-wdt 10060000.watchdog_cl0: watchdog active, reset enabled, irq disabled If the system has a 32-bit WTCNT, add QUIRK_HAS_32BIT_CNT to its quirk flags, and it will operate with a 32-bit counter. If not, it will operate with a 16-bit counter like in the previous version. Reviewed-by: Sam Protsenko <semen.protsenko@linaro.org> Signed-off-by: Sangwook Shin <sw617.shin@samsung.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>
2025-09-12watchdog: s3c2410_wdt: Fix max_timeout being calculated largerSangwook Shin-2/+8
Fix the issue of max_timeout being calculated larger than actual value. The calculation result of freq / (S3C2410_WTCON_PRESCALE_MAX + 1) / S3C2410_WTCON_MAXDIV is smaller than the actual value because the remainder is discarded during the calculation process. This leads to a larger calculated value for max_timeout compared to the actual settable value. To resolve this issue, the order of calculations in the computation process has been adjusted. Reviewed-by: Sam Protsenko <semen.protsenko@linaro.org> Signed-off-by: Sangwook Shin <sw617.shin@samsung.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>
2025-09-12watchdog: s3c2410_wdt: Replace hardcoded values with macro definitionsSangwook Shin-1/+1
Modify the code to utilize macro-defined values instead of hardcoded values. The value 0x100 in the s3c2410wdt_set_heartbeat function represents S3C2410_WTCON_PRESCALE_MAX + 1, but it is hardcoded, making its meaning difficult to understand and reducing code readability. Reviewed-by: Sam Protsenko <semen.protsenko@linaro.org> Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com> Signed-off-by: Sangwook Shin <sw617.shin@samsung.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>
2025-09-12watchdog: rzv2h: Improve error strings and add newlinesLad Prabhakar-4/+4
Update rzv2h_wdt_probe() to provide clearer error strings when retrieving the pclk, oscclk, and reset controller, and append missing newline characters to dev_err_probe() and dev_warn() calls for proper log formatting. Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com> Reviewed-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>
2025-09-12watchdog: rzv2h: Add support for RZ/T2HLad Prabhakar-3/+81
Add support for the RZ/T2H watchdog timer. The RZ/T2H requires control of the watchdog counter using the WDT Debug Control Register (WDTDCR), which allows explicitly stopping and starting the counter. This behavior differs from RZ/V2H, which doesn't have WDTDCR, so the driver is extended to handle this requirement. To support this, a new `wdtdcr` flag is introduced in the `rzv2h_of_data` structure. When set, the driver maps the WDTDCR register and uses it to control the watchdog counter in the start, stop, and restart callbacks. Additionally, the clock divisor and count source for RZ/T2H are defined to match its hardware configuration. Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com> Reviewed-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>
2025-09-12watchdog: rzv2h: Add support for configurable count clock sourceLad Prabhakar-1/+20
Add support for selecting the count clock source used by the watchdog timer. The RZ/V2H(P) SoC uses the LOCO as the count source, whereas on RZ/T2H and RZ/N2H SoCs, the count source is the peripheral clock (PCLKL). Introduce a `count_source` field in the SoC-specific data structure and refactor the clock rate selection logic accordingly. This prepares the driver for supporting the RZ/T2H and RZ/N2H SoCs, which differ in their watchdog clocking architecture from RZ/V2H(P). Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com> Reviewed-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>
2025-09-12watchdog: rzv2h: Make "oscclk" and reset controller optionalLad Prabhakar-2/+2
Update the rzv2h_wdt driver to make the "oscclk" clock and reset controller optional. Use devm_clk_get_optional_prepared() to obtain the "oscclk" clock, allowing the driver to work on platforms that do not provide this clock, such as the RZ/T2H SoC. Similarly, use devm_reset_control_get_optional_exclusive() to allow the driver to function on platforms that lack a reset controller. These changes are preparatory steps for supporting the RZ/T2H SoC, which does not provide an "oscclk" clock or a reset controller. Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com> Reviewed-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>
2025-09-12watchdog: rzv2h: Obtain clock-divider and timeout values from OF match dataLad Prabhakar-9/+26
Update the rzv2h_wdt driver to fetch clock configuration and timeout parameters from device tree match data rather than relying on hardcoded constants. Introduce a new structure rzv2h_of_data that encapsulates minimum and maximum clock select values (cks_min and cks_max), clock divider (cks_div), timeout cycle count (timeout_cycles), and the timeout period select bits (tops). These values are provided through the OF match table and retrieved via of_device_get_match_data() during probe. This change allows dynamic configuration of the watchdog timer for different SoCs, such as the RZ/T2H, which require different settings. Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com> Reviewed-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>
2025-09-12watchdog: intel_oc_wdt: Do not try to write into const memoryGuenter Roeck-4/+4
The code tries to update the intel_oc_wdt_info data structure if the watchdog is locked. That data structure is marked as const and can not be written into. Copy it into struct intel_oc_wdt and modify it there to fix the problem. Reported-by: Petar Kulić <cooleech@gmail.com> Cc: Diogo Ivo <diogo.ivo@siemens.com> Fixes: 535d1784d8a9 ("watchdog: Add driver for Intel OC WDT") Signed-off-by: Guenter Roeck <linux@roeck-us.net> Reviewed-by: Diogo Ivo <diogo.ivo@siemens.com> Tested-by: Diogo Ivo <diogo.ivo@siemens.com> Link: https://lore.kernel.org/linux-watchdog/20250818031838.3359-1-diogo.ivo@tecnico.ulisboa.pt/T/#t Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
generated by cgit v1.2.3 (git 2.46.0) at 2026-03-16 09:49:21 +0000