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Author SHA1 Message Date
Linus Torvalds
e6174e9b38 ACPI support fixes for 7.2-rc2 
- Add a missing ACPI_TAD_AC_WAKE capability check omitted by mistake to
    the ACPI TAD driver (Xu Rao)
 
  - Define acpi_ut_safe_strncpy() as an alias for strscpy_pad() which is
    viable because that function is only called from kernel code (Rafael
    Wysocki)
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Merge tag 'acpi-7.2-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull ACPI support fixes from Rafael Wysocki:
 "These fix a coding mistake in the ACPI TAD (Time and Alarm
  Device) driver introduced by one of its previous updates and
  get rid of the ugly #ifdef __KERNEL__ conditional compilation
  in acpi_ut_safe_strncpy() by redefining that function as an
  alias for strscpy_pad():

   - Add a missing ACPI_TAD_AC_WAKE capability check omitted by mistake
     to the ACPI TAD driver (Xu Rao)

   - Define acpi_ut_safe_strncpy() as an alias for strscpy_pad()
     which is viable because that function is only called from kernel
     code (Rafael Wysocki)"

* tag 'acpi-7.2-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  ACPICA: Define acpi_ut_safe_strncpy() as strscpy_pad() alias
  ACPI: TAD: Check AC wake capability before enabling wakeup
 2026-07-03 15:13:50 -10:00
Linus Torvalds
590cae7152 RISC-V updates for v7.2-rc2 
- Fix a crash when a kretprobe reads from the stack
 
 - Fix an issue with the build-time mcount sorter that broke ftrace
 
 - Fix the rv32 IRQ stack frame padding to match the ABI
 
 - Only defer IOMMU configuration during initialization.  This avoids
   an issue where IOMMU configuration could be indefinitely deferred
 
 - Add the missing build salt to the vDSO
 
 - Now that RISC-V systems with higher numbers of cores are starting to
   become available, raise NR_CPUS for RISC-V to 256
 
 - Clean up some warnings from sparse caused by the RISC-V-optimized
   RAID6 code
 
 - Clean up our __cpu_up() code with a few minor fixes
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Merge tag 'riscv-for-linus-7.2-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux

Pull RISC-V fixes from Paul Walmsley:

 - Fix a crash when a kretprobe reads from the stack

 - Fix an issue with the build-time mcount sorter that broke ftrace

 - Fix the rv32 IRQ stack frame padding to match the ABI

 - Only defer IOMMU configuration during initialization. This avoids an
   issue where IOMMU configuration could be indefinitely deferred

 - Add the missing build salt to the vDSO

 - Now that RISC-V systems with higher numbers of cores are starting to
   become available, raise NR_CPUS for RISC-V to 256

 - Clean up some warnings from sparse caused by the RISC-V-optimized
   RAID6 code

 - Clean up our __cpu_up() code with a few minor fixes

* tag 'riscv-for-linus-7.2-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
  riscv: probes: save original sp in rethook trampoline
  riscv: Fix 32-bit call_on_irq_stack() frame pointer ABI
  scripts/sorttable: Handle RISC-V patchable ftrace entries
  riscv: smp: use secs_to_jiffies in __cpu_up
  ACPI: RIMT: Only defer the IOMMU configuration in init stage
  riscv: Add build salt to the vDSO
  raid6: fix raid6_recov_rvv symbol undeclared warning
  raid6: fix riscv symbol undeclared warnigns
  riscv: Raise default NR_CPUS for 64BIT to 256
 2026-07-03 15:07:24 -10:00
Rafael J. Wysocki
973772c7cf Merge branch 'acpi-tad' 
Merge an ACPI TAD (Time and Alarm Device) driver fix for 7.2-rc2.

* acpi-tad:
  ACPI: TAD: Check AC wake capability before enabling wakeup
 2026-07-03 20:28:08 +02:00
Rafael J. Wysocki
9825cf2cb5 ACPICA: Define acpi_ut_safe_strncpy() as strscpy_pad() alias 
Commit 292db66afd ("ACPICA: Unbreak tools build after switching over
to strscpy_pad()") added an #ifdef based on a __KERNEL__ check which is
sort of nasty to the acpi_ut_safe_strncpy() definition to unbreak ACPICA
tools builds broken by commit 97f7d3f9c9 ("ACPICA: Replace strncpy()
with strscpy_pad() in acpi_ut_safe_strncpy()").  However, that #ifdef
effectively produces dead code when tools are built because they don't
call acpi_ut_safe_strncpy().

Accordingly, drop the existing definition of acpi_ut_safe_strncpy() and
define it as a strscpy_pad() alias.

Fixes: 292db66afd ("ACPICA: Unbreak tools build after switching over to strscpy_pad()")
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
[ rjw: Tweak the changelog ]
Link: https://patch.msgid.link/12941764.O9o76ZdvQC@rafael.j.wysocki
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
 2026-07-01 12:29:24 +02:00
Linus Torvalds
737b9ff0c8 ACPI support fixes and cleanups for 7.2-rc1 
- Unbreak ACPICA tools builds after switching over to using
    strscpy_pad() that is kernel-specific (Rafael Wysocki)
 
  - Fix module parameter file paths in comments in the ACPI code managing
    the general sysfs attributes (Zenghui Yu)
 
  - Update kerneldoc comments in the ACPI resource management code to
    follow the common style (Andy Shevchenko)
 
  - Fix inverted interface check in ipmi_bmc_gone() that may cause ACPI
    IPMI interfaces to be mishandled (Xu Rao)
 
  - Add __cpuidle annotation to idle state management functions related
    to ACPI _LPI to avoid trace-induced RCU warnings (Li RongQing)
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Merge tag 'acpi-7.2-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull ACPI support fixes and cleanups from Rafael Wysocki:
 "These fix assorted issues and do cleanups in the ACPI support code,
  which includes a fix for tools build breakage related to strncpy()
  removal:

   - Unbreak ACPICA tools builds after switching over to using
     strscpy_pad() that is kernel-specific (Rafael Wysocki)

   - Fix module parameter file paths in comments in the ACPI code
     managing the general sysfs attributes (Zenghui Yu)

   - Update kerneldoc comments in the ACPI resource management code to
     follow the common style (Andy Shevchenko)

   - Fix inverted interface check in ipmi_bmc_gone() that may cause ACPI
     IPMI interfaces to be mishandled (Xu Rao)

   - Add __cpuidle annotation to idle state management functions related
     to ACPI _LPI to avoid trace-induced RCU warnings (Li RongQing)"

* tag 'acpi-7.2-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  ACPI: processor_idle: Mark LPI enter functions as __cpuidle
  ACPICA: Unbreak tools build after switching over to strscpy_pad()
  ACPI: IPMI: Fix inverted interface check in ipmi_bmc_gone()
  ACPI: resource: Amend kernel-doc style
  ACPI: sysfs: Fix path of module parameters in comments
 2026-06-26 13:00:10 -07:00
Rafael J. Wysocki
cf1e70d021 Merge branches 'acpi-sysfs', 'acpi-resource', 'acpi-driver' and 'acpi-processor' 
Merge an update of comments regarding the ACPI sysfs code, a kernel-doc
style fixup update of ACPI resource management, and ACPI IPMI driver
fix, and an ACPI processor driver fix for 7.2-rc1:

 - Fix module parameter file paths in comments in the ACPI code managing
   the general sysfs attributes (Zenghui Yu)

 - Update kerneldoc comments in the ACPI resource management code to
   follow the common style (Andy Shevchenko)

 - Fix inverted interface check in ipmi_bmc_gone() which may cause ACPI
   IPMI interfaces to be mishandled (Xu Rao)

 - Add __cpuidle to idle state management functions related to ACPI _LPI
   to avoid trace-induced RCU warnings (Li RongQing)

* acpi-sysfs:
  ACPI: sysfs: Fix path of module parameters in comments

* acpi-resource:
  ACPI: resource: Amend kernel-doc style

* acpi-driver:
  ACPI: IPMI: Fix inverted interface check in ipmi_bmc_gone()

* acpi-processor:
  ACPI: processor_idle: Mark LPI enter functions as __cpuidle
 2026-06-26 18:57:38 +02:00
Yicong Yang
b8f62414fa ACPI: RIMT: Only defer the IOMMU configuration in init stage 
The IOMMU configuration will be deferred if the IOMMU driver
isn't probed by the time. Make this deferral only in the
initialization stage with driver_deferred_probe_check_state().
Otherwise the devices depends on IOMMU will be deferred forever
in case the IOMMU device probe failed or it doesn't appear in
the ACPI namespace.

Fixes: 8f77295525 ("ACPI: RISC-V: Add support for RIMT")
Signed-off-by: Yicong Yang <yang.yicong@picoheart.com>
Link: https://patch.msgid.link/20260625094702.11558-1-yang.yicong@picoheart.com
[pjw@kernel.org: added Fixes line]
Signed-off-by: Paul Walmsley <pjw@kernel.org>
 2026-06-25 12:18:05 -06:00
Xu Rao
8522d806d8 ACPI: TAD: Check AC wake capability before enabling wakeup 
ACPI_TAD_AC_WAKE is a non-zero bit definition, so testing the macro
itself is always true. As a result, every TAD device is initialized as
a system wakeup device, including RTC-only devices and devices whose
wake capability bits were cleared because _PRW is absent.

Test the capability value returned by _GCP instead. This keeps
RTC-only TAD devices usable without advertising a wakeup capability
that the firmware does not provide.

Fixes: 6c711fde3a ("ACPI: TAD: Support RTC without wakeup")
Cc: All applicable <stable@vger.kernel.org>
Signed-off-by: Xu Rao <raoxu@uniontech.com>
Link: https://patch.msgid.link/961A84FF37B50665+20260625132903.2840457-1-raoxu@uniontech.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
 2026-06-25 15:39:58 +02:00
Li RongQing
956ca5d72c ACPI: processor_idle: Mark LPI enter functions as __cpuidle 
When function tracing or Kprobes is enabled, entering an ACPI Low
Power Idle (LPI) state triggers the following RCU splat:

  RCU not on for: acpi_idle_lpi_enter+0x4/0xd8
  WARNING: CPU: 8 PID: 0 at include/linux/trace_recursion.h:162 function_trace_call+0x1e8/0x228

The acpi_idle_lpi_enter() function is invoked within the cpuidle
path after RCU has already been disabled for the current local CPU.
Consequently, ftrace's function_trace_call() expects RCU to be
actively watching before recording trace data, emitting a warning
if it is not.

Fix this by annotating acpi_idle_lpi_enter(), the generic __weak
stub, and the RISC-V implementation of acpi_processor_ffh_lpi_enter()
with __cpuidle. This moves these functions into the '.cpuidle.text'
section, implicitly disabling ftrace instrumentation (notrace) along
this sensitive path and preventing trace-induced RCU warnings during
idle entry.

Fixes: a36a7fecfe ("ACPI / processor_idle: Add support for Low Power Idle(LPI) states")
Signed-off-by: Li RongQing <lirongqing@baidu.com>
Acked-by: lihuisong@huawei.com
Link: https://patch.msgid.link/20260616072617.2272-1-lirongqing@baidu.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
 2026-06-24 15:15:53 +02:00
Rafael J. Wysocki
292db66afd ACPICA: Unbreak tools build after switching over to strscpy_pad() 
Commit 97f7d3f9c9 ("ACPICA: Replace strncpy() with strscpy_pad() in
acpi_ut_safe_strncpy()") switched over the ACPICA code in the kernel to
using strscpy_pad() instead of a combination of strncpy() and manual
NUL-termination of the destination string, but it overlooked the fact
that tools also use the code in question and strscpy_pad() is not
defined in those builds.

Address that by using the original ACPICA code in non-kernel builds.

Fixes: 97f7d3f9c9 ("ACPICA: Replace strncpy() with strscpy_pad() in acpi_ut_safe_strncpy()")
Reported-by: Jiri Slaby <jirislaby@kernel.org>
Closes: https://lore.kernel.org/all/79e9e913-0fb1-4110-804b-c3b5d0edafe4@kernel
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Kees Cook <kees@kernel.org>
[ rjw: Fixed up the number of added code lines ]
Link: https://patch.msgid.link/12923581.O9o76ZdvQC@rafael.j.wysocki
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
 2026-06-24 15:02:29 +02:00
Linus Torvalds
f31c00c377 platform-drivers-x86 for v7.2-1 
Highlights:
 
 - amd/hfi: Add support for dynamic ranking tables (version 3)
 
 - amd/pmc:
   - Add PMC driver support for AMD 1Ah M80H SoC
   - Delay suspend for some Lenovo Laptops to avoid keyboard and lid
     switch problems after s2idle
 
 - arm64: qcom-hamoa-ec: Add Hamoa/Purwa/Glymur EC driver
 
 - asus-armoury: add support for G614PR, GA402NJ, GA403UM, and FX608JPR
 
 - asus-wmi: add keystone dongle support
 
 - dell-dw5826e: Add reset driver for DW5826e
 
 - dell-laptop: Fix rollback path
 
 - hp-wmi:
   - Add support for Omen 16-ap0xxx (board ID 8D26) and board ID 8B2F
 
 - intel-hid:
   - Add HP ProBook x360 440 G1 5 button array support
   - Prevent racing ACPI notify handlers
 
 - intel/pmc:
   - Add Nova Lake support
   - Rate-limit LTR scale-factor warning
 
 - intel-uncore-freq:
   - Expose instance ID in the sysfs
   - Fix current_freq_khz after CPU hotplug
 
 - intel/vsec: Restore BAR fallback for header walk
 
 - ISST: Restore SST-PP control to all domains
 
 - lenovo-wmi-*:
   - Add more CPU tunable attributes
   - Add GPU tunable attributes
   - Add WMI battery charge limiting
 
 - oxpec: add support for OneXPlayer Super X
 
 - sel3350-platform: Retain LED state on load and unload
 
 - surface: SAM: Add support for Surface Pro 12in
 
 - uniwill-laptop: Add support for battery charge modes
 
 - tools/power/x86/intel-speed-select: Harden daemon pidfile open
 
 - Major refactoring efforts:
   - ACPI driver to platform driver conversion
   - Converting drivers to use the improved WMI API
 
 - Miscellaneous cleanups / refactoring / improvements
 
 The following is an automated shortlog grouped by driver:
 
 ACPI:
  -  provide acpi_bus_find_device_by_name()
 
 alienware-wmi-base:
  -  Transition to new WMI API
 
 amd: hfi:
  -  Support for ranking table versions
 
 amd/hsmp:
  -  Clamp ioctl/send_message indices (Spectre v1)
 
 amd/pmc:
  -  Add delay_suspend module parameter
  -  Add PMC driver support for AMD 1Ah M80H SoC
  -  Check for intermediate wakeup in function
  -  Delay suspend for some Lenovo Laptops
  -  Don't log during intermediate wakeups
  -  Use per-SoC cpu_info struct for SMU mailbox and IP info
 
 apple-gmux:
  -  Drop unused assignment of pnp_device_id driver data
 
 arm64:
  -  Add driver for EC found on Qualcomm reference devices
 
 arm64: qcom-hamoa-ec:
  -  Fix indentation in comment tables
 
 arm64 Use named initializers for struct i2c_device_id:
  - arm64 Use named initializers for struct i2c_device_id
 
 asus-armoury:
  -  add support for FX608JPR
  -  add support for G614PR
  -  add support for GA402NJ
  -  add support for GA403UM
 
 asus-wmi:
  -  add keystone dongle support
 
 barco-p50-gpio:
  -  attach software node to its target GPIO device
 
 classmate-laptop:
  -  Address memory leaks on driver removal
  -  Convert accel driver to a platform one
  -  Convert ipml driver to a platform one
  -  Convert keys driver to a platform one
  -  Convert tablet driver to a platform one
  -  Convert v4 accel driver to a platform one
  -  Pass struct device pointer to helpers
  -  Register ACPI notify handlers directly
  -  Rename two helper functions
  -  Unify probe rollback and remove code
 
 dell-ddv:
  -  Use new buffer-based WMI API
 
 dell-descriptor:
  -  Use new buffer-based WMI API
 
 dell-dw5826e:
  -  Add reset driver for DW5826e
 
 dell-laptop:
  -  add Inspiron N5110 to touchpad LED quirk table
  -  fix missing cleanups in init error path
 
 dell-privacy:
  -  correct CONFIG_DELL_WMI_PRIVACY macro name in comments
  -  Use new buffer-based WMI API
 
 dell_rbu:
  -  use strscpy in image_type_write
 
 dell-smbios-wmi:
  -  Use new buffer-based WMI API
 
 dell-wmi-base:
  -  Use new buffer-based WMI API
 
 docs:
  -  fix typo in uniwill-laptop.rst
 
 hp-wmi:
  -  Add support for Omen 16-ap0xxx (8D26)
  -  Add support for Omen 16-ap0xxx (8E35)
  -  Add thermal support for board 8B2F
 
 hwmon:
  -  (dell-smm) Use new buffer-based WMI API
 
 intel-hid:
  -  Add HP ProBook x360 440 G1 to button_array_table
  -  Protect ACPI notify handler against recursion
 
 intel/pmc:
  -  Add ACPI PWRM telemetry driver for Nova Lake S
  -  Add Nova Lake support to intel_pmc_core driver
  -  Add NVL PCI IDs for SSRAM telemetry discovery
  -  Add PMC SSRAM Kconfig description
  -  Add support for variable DMU offsets
  -  Enable Pkgc blocking residency counter
  -  Enable PkgC LTR blocking counter
  -  rate-limit LTR scale-factor warning
  -  Retrieve PMC info only for available PMCs
 
 intel/pmc/ssram:
  -  Add ACPI discovery scaffolding
  -  Add PCI platform data
  -  Make PMT registration optional
  -  Refactor DEVID/PWRMBASE extraction into helper
  -  Rename probe and PCI ID table for consistency
  -  Switch to static array with per-index probe state
 
 intel/pmc:
  -  Use __free() in pmc_core_punit_pmt_init()
  -  Use PCI DID for PMC SSRAM device discovery
 
 intel/pmt:
  -  Add pre/post decode hooks around header parsing
  -  Cache the telemetry discovery header
 
 intel/pmt/crashlog:
  -  Split init into pre-decode
 
 intel/pmt:
  -  Pass discovery index instead of resource
 
 intel/pmt/telemetry:
  -  Move overlap check to post-decode hook
 
 intel/pmt:
  -  Unify header fetch and add ACPI source
 
 intel/tpmi:
  -  convert mutex in mem_write() to guard
  -  use cleanup helpers in mem_write()
 
 intel-uncore-freq:
  -  Expose instance ID in the sysfs
  -  Fix current_freq_khz after CPU hotplug
  -  Rename instance_id
 
 intel/vsec:
  -  allocate res with intel_vsec_dev
  -  Restore BAR fallback for header walk
 
 ISST:
  -  Restore SST-PP control to all domains
 
 lenovo-wmi-capdata:
  -  Add debugfs file for dumping capdata
 
 lenovo-wmi-helpers:
  -  Add helper for creating per-device debugfs dir
 
 lenovo-wmi-other:
  -  Add force_load_psy_ext module parameter
  -  Add GPU tunable attributes
  -  Add missing CPU tunable attributes
  -  Add WMI battery charge limiting
  -  Rename LWMI_OM_FW_ATTR_BASE_PATH
 
 meraki-mx100:
  -  use real software node references
 
 modpost:
  -  Handle malformed WMI GUID strings
 
 Move delayed work on system_dfl_wq:
  - Move delayed work on system_dfl_wq
 
 msi-ec:
  -  Add support for MSI Pulse GL66 12th Gen
 
 oxpec:
  -  add support for OneXPlayer Super X
 
 panasonic-laptop:
  -  simplify allocation of sinf
 
 pcengines-apuv2:
  -  reduce indiraction in swnode assignment
 
 pmc_atom:
  -  Use named initializer for pci_device_id array
 
 sel3350-platform:
  -  Retain LED state on load and unload
 
 sonypi:
  -  use strscpy() in sonypi_acpi_probe
 
 surface: SAM:
  -  Add support for Surface Pro 12in
 
 thinkpad_acpi:
  -  Add debugfs entry to display HWDD raw
  -  Remove unneeded goto
 
 tools/power/x86/intel-speed-select:
  -  Harden daemon pidfile open
 
 uniwill-laptop:
  -  Add support for battery charge modes
  -  Enable battery charge modes on supported devices
  -  Mark EC_ADDR_OEM_4 as volatile
  -  Rework FN lock/super key suspend handling
 
 use u8 * for raw byte buffers:
  - use u8 * for raw byte buffers
 
 wmi:
  -  Make sysfs attributes const
  -  Make wmi_bus_class const
 
 x86-android-tablets:
  -  enable fwnode matching of GPIO chips
  -  Use named initializers for struct i2c_device_id
 
 x86/platform/olpc: xo15:
  -  Convert ACPI driver to a platform one
  -  Drop wakeup source on driver removal
 
 xo15-ebook:
  -  Convert ACPI driver to a platform one
  -  Fix formatting of labels
  -  Fix wakeup source and GPE handling
  -  Register ACPI notify handler directly
  -  Use devres-based resource management
 
 Merges:
  -  Merge branch 'fixes' into for-next
  -  Merge branch 'fixes' of into for-next
  -  Merge branch 'intel-sst' of https://github.com/spandruvada/linux-kernel into review-ilpo-next
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Merge tag 'platform-drivers-x86-v7.2-1' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86

Pull x86 platform driver updates from Ilpo Järvinen:

 - amd/hfi: Add support for dynamic ranking tables (version 3)

 - amd/pmc:
     - Add PMC driver support for AMD 1Ah M80H SoC
     - Delay suspend for some Lenovo Laptops to avoid keyboard and lid
       switch problems after s2idle

 - arm64: qcom-hamoa-ec: Add Hamoa/Purwa/Glymur EC driver

 - asus-armoury: add support for G614PR, GA402NJ, GA403UM, and FX608JPR

 - asus-wmi: add keystone dongle support

 - dell-dw5826e: Add reset driver for DW5826e

 - dell-laptop: Fix rollback path

 - hp-wmi:
     - Add support for Omen 16-ap0xxx (board ID 8D26) and board ID 8B2F

 - intel-hid:
     - Add HP ProBook x360 440 G1 5 button array support
     - Prevent racing ACPI notify handlers

 - intel/pmc:
     - Add Nova Lake support
     - Rate-limit LTR scale-factor warning

 - intel-uncore-freq:
     - Expose instance ID in the sysfs
     - Fix current_freq_khz after CPU hotplug

 - intel/vsec: Restore BAR fallback for header walk

 - ISST: Restore SST-PP control to all domains

 - lenovo-wmi-*:
     - Add more CPU tunable attributes
     - Add GPU tunable attributes
     - Add WMI battery charge limiting

 - oxpec: add support for OneXPlayer Super X

 - sel3350-platform: Retain LED state on load and unload

 - surface: SAM: Add support for Surface Pro 12in

 - uniwill-laptop: Add support for battery charge modes

 - tools/power/x86/intel-speed-select: Harden daemon pidfile open

 - Major refactoring efforts:
     - ACPI driver to platform driver conversion
     - Converting drivers to use the improved WMI API

 - Miscellaneous cleanups / refactoring / improvements

* tag 'platform-drivers-x86-v7.2-1' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86: (115 commits)
  platform/x86/intel/pmc: Add NVL PCI IDs for SSRAM telemetry discovery
  platform/x86/intel/pmc/ssram: Make PMT registration optional
  platform/x86/intel/pmc/ssram: Add ACPI discovery scaffolding
  platform/x86/intel/pmc/ssram: Switch to static array with per-index probe state
  platform/x86/intel/pmc/ssram: Refactor DEVID/PWRMBASE extraction into helper
  platform/x86/intel/pmc/ssram: Add PCI platform data
  platform/x86/intel/pmc/ssram: Rename probe and PCI ID table for consistency
  platform/x86/intel/pmc: Add ACPI PWRM telemetry driver for Nova Lake S
  platform/x86/intel/pmc: Add PMC SSRAM Kconfig description
  platform/x86/intel/pmt: Unify header fetch and add ACPI source
  platform/x86/intel/pmt: Cache the telemetry discovery header
  platform/x86/intel/pmt: Pass discovery index instead of resource
  platform/x86/intel/pmt/telemetry: Move overlap check to post-decode hook
  platform/x86/intel/pmt/crashlog: Split init into pre-decode
  platform/x86/intel/pmt: Add pre/post decode hooks around header parsing
  modpost: Handle malformed WMI GUID strings
  platform/wmi: Make sysfs attributes const
  platform/wmi: Make wmi_bus_class const
  hwmon: (dell-smm) Use new buffer-based WMI API
  platform/x86: dell-ddv: Use new buffer-based WMI API
  ...
 2026-06-23 08:31:33 -07:00
Xu Rao
71b57aca29 ACPI: IPMI: Fix inverted interface check in ipmi_bmc_gone() 
Before commit a1a69b297e ("ACPI / IPMI: Fix race caused by the
unprotected ACPI IPMI user"), ipmi_bmc_gone() skipped entries whose
interface number did not match the SMI being removed, then killed the
matching entry:

	if (ipmi_device->ipmi_ifnum != iface)
		continue;

	__ipmi_dev_kill(ipmi_device);

That commit folded the removal block into the existing non-match test
while converting the object lifetime handling, but left the comparison
unchanged. The old != meant "continue past this entry"; after the
refactor it meant "kill this entry".

As a result, a single ACPI IPMI interface is never removed when its SMI
disappears. If multiple interfaces are tracked, the first interface
whose number differs from iface is removed instead, while the interface
that actually disappeared remains on driver_data.ipmi_devices. The
stale entry is not marked dead and can continue to be selected for ACPI
IPMI transactions. It can also prevent the same ACPI handle from being
registered again.

Change the comparison to == so ipmi_bmc_gone() removes exactly the
interface reported as gone by the SMI watcher. This restores the
pre-a1a69b297e47 behavior and is the correct interface matching logic.

Fixes: a1a69b297e ("ACPI / IPMI: Fix race caused by the unprotected ACPI IPMI user")
Signed-off-by: Xu Rao <raoxu@uniontech.com>
Link: https://patch.msgid.link/B486593E06E6F6E0+20260616093621.1039943-1-raoxu@uniontech.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
 2026-06-19 20:56:20 +02:00
Andy Shevchenko
78ad5c7722 ACPI: resource: Amend kernel-doc style 
The functions are referred as func() in the kernel-doc. The % (percent)
character makes the rendering for constants as described in the respective
documentation. Amend all these.

Fixes: 8e345c991c ("ACPI: Centralized processing of ACPI device resources")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://patch.msgid.link/20260617090555.2648709-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
 2026-06-19 20:21:42 +02:00
Zenghui Yu
b2b42ad228 ACPI: sysfs: Fix path of module parameters in comments 
The correct path of module parameters should be
/sys/module/acpi/parameters/xxx. Fix them.

Signed-off-by: Zenghui Yu <zenghui.yu@linux.dev>
Link: https://patch.msgid.link/20260611142518.77343-1-zenghui.yu@linux.dev
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
 2026-06-19 20:19:11 +02:00
Linus Torvalds
c41cfae42c spi: Updates for v7.2 
This has been quite a busy release, mainly due to the subsystem wide
 work Johan Hovold has done to modernise resource allocation for the
 subsystem on probe, the subsystem did some very clever allocation
 management pre devm which didn't quite mesh comfortably with managed
 allocations and made it far too easy to introduce error handling and
 removal bugs.
 
  - Cleanup and simplification of controller struct allocation, moving
    everything over to devm and making the devm APIs more robust, from
    Johan Hovold
  - Support for spi-mem devices that don't assert chip select and support
    for a secondary read command for memory mapped flashes, some commits
    for this are shared with mtd.
  - Support for SpacemiT K1.
 
 There will be a simple add/add conflict with the i2c-host tree in the
 x86 quirk data in drivers/acpi/acpi_apd.c.
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Merge tag 'spi-v7.2' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi

Pull spi updates from Mark Brown:
 "This has been quite a busy release, mainly due to the subsystem wide
  work Johan Hovold has done to modernise resource allocation for the
  subsystem on probe, the subsystem did some very clever allocation
  management pre devm which didn't quite mesh comfortably with managed
  allocations and made it far too easy to introduce error handling and
  removal bugs.

   - Cleanup and simplification of controller struct allocation, moving
     everything over to devm and making the devm APIs more robust, from
     Johan Hovold

   - Support for spi-mem devices that don't assert chip select and
     support for a secondary read command for memory mapped flashes,
     some commits for this are shared with mtd.

   - Support for SpacemiT K1"

* tag 'spi-v7.2' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi: (118 commits)
  spi: Fix mismatched DT property access types
  spi: xilinx: use FIFO occupancy register to determine buffer size
  spi: spi-mem: Fix spi_controller_mem_ops kdoc
  spi: xilinx: let transfers timeout in case of no IRQ
  spi: dt-bindings: nuvoton,npcm750-fiu: Convert to DT schema
  spi: meson-spifc: fix runtime PM leak on remove
  spi: Use named initializers for platform_device_id arrays
  spi: rzv2h-rspi: Add suspend/resume support
  spi: dw-pci: remove redundant pci_free_irq_vectors() calls
  spi: ep93xx: fix double-free of zeropage on DMA setup failure
  spi: cadence-xspi: Revert COMPILE_TEST support
  spi: cadence-xspi: Support 32bit and 64bit slave dma interface
  spi: tegra210-quad: Allocate DMA memory for DMA engine
  spi: imx: replace dmaengine_terminate_all() with dmaengine_terminate_sync()
  spi: fsl-lpspi: terminate the RX channel on TX prepare failure path
  spi: fsl-lpspi: replace dmaengine_terminate_all() with dmaengine_terminate_sync()
  spi: atmel: fix DMA channel and bounce buffer leaks
  spi: omap2-mcspi: Use of_device_get_match_data()
  spi: Use named initializers for arrays of i2c_device_data
  spi: aspeed: Replace VLA parameter with flat pointer in calibration helper
  ...
 2026-06-16 07:56:47 +05:30
Linus Torvalds
2779759c09 i2c for v7.2 
Two major cleanup across drivers and core code:
  - use named initializers in device ID tables
  - replace dev_err() with dev_err_probe()
 
 Drivers:
 - at24: use named initializers for arrays of i2c_device_data
 - at91: add MCHP_LAN966X_PCI dependency
 - cadence: add shutdown callback
 - k1: enable by default on SpacemiT
 - mxs: improve documentation
 - qcom-geni: use pm_runtime_force_suspend/resume for system sleep
 - tegra:
    - disable fair arbitration on non-MCTP buses
    - allocate DMA buffers from the correct DMA device
 - designware:
    - handle active target shutdown cleanly
    - add shutdown callbacks for platform and PCI drivers
    - adopt the new PM_RUNTIME_ACQUIRE() helpers
 
 DT bindings:
 - convert davinci bindings to DT schema
 
 Core and muxes:
 - acpi: report missing I2C resources as -ENOENT
 - gpiolib: add gpiod_is_single_ended() helper for I2C GPIO users
 - i2c-mux-reg: add generic firmware node support
 - a set of 10 patches from Johan Hovold fixing adapter
   registration races, cleanup paths and resource management
   issues
 
 New support:
 - DesignWare LECA0003 (ACPI ID)
 - Loongson LS2K0300 I2C controller (new driver)
 - Qualcomm CCI Glymur and Shikra compatibles
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Merge tag 'i2c-7.2-part1' of git://git.kernel.org/pub/scm/linux/kernel/git/andi.shyti/linux

Pull i2c updates from Andi Shyti:
 "This pull request is mostly made of cleanups and small infrastructure
  improvements across the I2C core, drivers and bindings. It also adds
  support for three drivers and a few new compatibles.

  Two major cleanup across drivers and core code:
   - use named initializers in device ID tables
   - replace dev_err() with dev_err_probe()

  Drivers:
   - at24: use named initializers for arrays of i2c_device_data
   - at91: add MCHP_LAN966X_PCI dependency
   - cadence: add shutdown callback
   - k1: enable by default on SpacemiT
   - mxs: improve documentation
   - qcom-geni: use pm_runtime_force_suspend/resume for system sleep
   - tegra:
       - disable fair arbitration on non-MCTP buses
       - allocate DMA buffers from the correct DMA device
   - designware:
       - handle active target shutdown cleanly
       - add shutdown callbacks for platform and PCI drivers
       - adopt the new PM_RUNTIME_ACQUIRE() helpers

  DT bindings:
   - convert davinci bindings to DT schema

  Core and muxes:
   - acpi: report missing I2C resources as -ENOENT
   - gpiolib: add gpiod_is_single_ended() helper for I2C GPIO users
   - i2c-mux-reg: add generic firmware node support
   - a set of 10 patches from Johan Hovold fixing adapter registration
     races, cleanup paths and resource management issues

  New support:
   - DesignWare LECA0003 (ACPI ID)
   - Loongson LS2K0300 I2C controller (new driver)
   - Qualcomm CCI Glymur and Shikra compatibles"

* tag 'i2c-7.2-part1' of git://git.kernel.org/pub/scm/linux/kernel/git/andi.shyti/linux: (46 commits)
  i2c: mxs: add missing kernel-doc for struct mxs_i2c_dev members
  i2c: qcom-geni: Use pm_runtime_force_{suspend,resume} helpers
  dt-bindings: i2c: qcom-cci: Document Glymur compatible
  dt-bindings: i2c: qcom-cci: Document Shikra compatible
  i2c: mux: reg: use device property accessors
  i2c: acpi: Return -ENOENT when no resources found in i2c_acpi_client_count()
  i2c: at91: Add MCHP_LAN966X_PCI dependency
  i2c: eg20t: Consistently define pci_device_ids using named initializers
  i2c: designware-pcidrv: Consistently define pci_device_ids using named initializers
  i2c: bcm-kona: fix spelling mistake in timeout-check comment
  i2c: cadence: Add shutdown handler
  i2c: tegra: Disable fair arbitration for non-MCTP buses
  i2c: tegra: use dmaengine_get_dma_device() for DMA buffer allocation
  i2c: busses: make K1 driver default for SpacemiT platforms
  i2c: Use named initializers for arrays of i2c_device_data
  i2c: core: clean up adapter registration error label
  i2c: core: clean up bus id allocation
  i2c: core: fix adapter deregistration race
  i2c: core: fix adapter registration race
  i2c: core: disable runtime PM on adapter registration failure
  ...
 2026-06-16 07:43:29 +05:30
Linus Torvalds
f20e2fdaae Updates for clocksource/clockevent drivers: 
- Add devm helpers for clocksources, which allows to simplify driver
     teardown and probe failure handling.
 
   - More module conversion work
 
   - Update the support for the ARM EL2 virtual timer including the required
     ACPI changes.
 
   - Add clockevent and clocksource support for the TI Dual Mode Timer
 
   - Fix the support for multiple watchdog instances in the TEGRA186 driver
 
   - Add D1 timer support to the SUN5I driver
 
   - The usual devicetree updates, cleanups and small fixes all over the place
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Merge tag 'timers-clocksource-2026-06-13' of gitolite.kernel.org:pub/scm/linux/kernel/git/tip/tip

Pull clocksource updates from Thomas Gleixner:
 "Updates for clocksource/clockevent drivers:

   - Add devm helpers for clocksources, which allows to simplify driver
     teardown and probe failure handling.

   - More module conversion work

   - Update the support for the ARM EL2 virtual timer including the
     required ACPI changes.

   - Add clockevent and clocksource support for the TI Dual Mode Timer

   - Fix the support for multiple watchdog instances in the TEGRA186
     driver

   - Add D1 timer support to the SUN5I driver

   - The usual devicetree updates, cleanups and small fixes all over the
     place"

* tag 'timers-clocksource-2026-06-13' of gitolite.kernel.org:pub/scm/linux/kernel/git/tip/tip: (24 commits)
  clocksource: move NXP timer selection to drivers/clocksource
  clocksource/drivers/timer-tegra186: Reserve and service a kernel watchdog
  clocksource/drivers/timer-tegra186: Register all accessible watchdog timers
  clocksource/drivers/timer-tegra186: Correct num_wdts for Tegra186 and Tegra234
  clocksource/drivers/timer-tegra186: Fix support for multiple watchdog instances
  clocksource/drivers/timer-ti-dm: Add clockevent support
  clocksource/drivers/timer-ti-dm: Add clocksource support
  clocksource/drivers/timer-ti-dm: Fix property name in comment
  dt-bindings: timer: arm,arch_timer: Fix requirements for interrupt description
  clocksource/drivers/arm_arch_timer: Default to EL2 virtual timer when running VHE
  ACPI: GTDT: Parse information related to the EL2 virtual timer
  ACPI: GTDT: Account for GTDTv3 size when walking the platform timer descriptors
  clocksource: Add devm_clocksource_register_*() helpers
  clocksource/drivers/sun5i: Add D1 hstimer support
  dt-bindings: timer: allwinner,sun5i-a13-hstimer: add H616 and D1
  dt-bindings: timer: Add StarFive JHB100 clint
  dt-bindings: timer: renesas,rz-mtu3: document RZ/{T2H,N2H}
  dt-bindings: timer: renesas,rz-mtu3: Remove TCIU8 interrupt
  dt-bindings: timer: Remove sifive,fine-ctr-bits property
  clocksource/drivers/timer-of: Make the code compatible with modules
  ...
 2026-06-15 13:34:03 +05:30
Linus Torvalds
36808d5e98 Driver core changes for 7.2-rc1 
- deferred probe:
   - Fix race where deferred probe timeout work could be permanently
     canceled by using mod_delayed_work()
   - Fix missing jiffies conversion in deferred_probe_extend_timeout()
   - Guard timeout extension with delayed_work_pending() to prevent
     premature firing
   - Use system_percpu_wq instead of the deprecated system_wq
   - Update deferred_probe_timeout documentation
 
 - device:
   - Replace direct struct device bitfield access (can_match, dma_iommu,
     dma_skip_sync, dma_ops_bypass, state_synced, dma_coherent,
     of_node_reused, offline, offline_disabled) with flag-based
     accessors using bit operations
   - Reject devices with unregistered buses
   - Delete unused DEVICE_ATTR_PREALLOC()
   - Add low-level device attribute macros with const show/store
     callbacks, allowing device attributes to reside in read-only memory
   - Move core device attributes to read-only memory
   - Constify group array pointers in driver_add_groups() /
     driver_remove_groups(), struct bus_type, and struct device_driver
 
 - device property:
   - Fix fwnode reference leak in fwnode_graph_get_endpoint_by_id()
   - Initialize all fields of fwnode_handle in fwnode_init()
   - Provide swnode_get()/swnode_put() wrappers around kobject_get/put()
   - Allow passing struct software_node_ref_args pointers directly to
     PROPERTY_ENTRY_REF()
 
 - driver_override:
   - Migrate amba, cdx, vmbus, and rpmsg to the generic driver_override
     infrastructure, fixing a UAF from unsynchronized access to
     driver_override in bus match() callbacks
   - Remove the now-unused driver_set_override()
 
 - firmware loader:
   - Fix recursive lock deadlock in device_cache_fw_images() when async
     work falls back to synchronous execution
   - Fix device reference leak in firmware_upload_register()
 
 - platform:
   - Pass KBUILD_MODNAME through the platform driver registration macro
     to create module symlinks in sysfs for built-in drivers; move
     module_kset initialization to a pure_initcall and tegra cbb
     registration to core_initcall to ensure correct ordering
   - Pass THIS_MODULE implicitly through a coresight_init_driver() macro
 
 - sysfs:
   - Upgrade OOB write detection in sysfs_kf_seq_show() from printk to
     WARN
   - Add return value clamping to sysfs_kf_read()
 
 - Rust:
   - ACPI:
     - Fix missing match data for PRP0001 by exporting
       acpi_of_match_device()
 
   - Auxiliary:
     - Replace drvdata() with dedicated registration data on
       auxiliary_device. drvdata() exposed the driver's bus device
       private data beyond the driver's own scope, creating ordering
       constraints and forcing the data to outlive all registrations
       that access it. Registration data is instead scoped structurally
       to the Registration object, making lifecycle ordering enforced
       by construction rather than convention.
 
   - Rust-native device driver lifetimes (HRT):
     - Allow Rust device drivers to carry a lifetime parameter on their
       bus device private data, tied to the device binding scope -- the
       interval during which a bus device is bound to a driver. Device
       resources like pci::Bar<'a> and IoMem<'a> can be stored directly
       in the driver's bus device private data with a lifetime bounded
       by the binding scope, so the compiler enforces at build time that
       they do not outlive the binding. This removes Devres indirection
       from every access site and eliminates try_access() failure paths
       in destructors.
 
       Bus driver traits use a Generic Associated Type (GAT)
       Data<'bound> to introduce the lifetime on the private data,
       rather than parameterizing the Driver trait itself. Auxiliary
       registration data, where the lifetime is not introduced by a
       trait callback but must be threaded through Registration, uses
       the ForLt trait (a type-level abstraction for types generic over
       a lifetime).
 
 - Misc:
   - Fix DT overlayed devices not probing by reverting the broken
     treewide overlay fix and re-running fw_devlink consumer pickup when
     an overlay is applied to a bound device
   - Use root_device_register() for faux bus root device; add sanity
     check for failed bus init
   - Fix dev_has_sync_state() data race with READ_ONCE() and move it to
     base.h
   - Avoid spurious device_links warning when removing a device while
     its supplier is unbinding
   - Switch ISA bus to dynamic root device
   - Fix suspicious RCU usage in kernfs_put()
   - Remove devcoredump exit callback
   - Constify devfreq_event_class
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Merge tag 'driver-core-7.2-rc1' of gitolite.kernel.org:pub/scm/linux/kernel/git/driver-core/driver-core

Pull driver core updates from Danilo Krummrich:
 "Deferred probe:
   - Fix race where deferred probe timeout work could be permanently
     canceled by using mod_delayed_work()
   - Fix missing jiffies conversion in deferred_probe_extend_timeout()
   - Guard timeout extension with delayed_work_pending() to prevent
     premature firing
   - Use system_percpu_wq instead of the deprecated system_wq
   - Update deferred_probe_timeout documentation

  device:
   - Replace direct struct device bitfield access (can_match, dma_iommu,
     dma_skip_sync, dma_ops_bypass, state_synced, dma_coherent,
     of_node_reused, offline, offline_disabled) with flag-based
     accessors using bit operations
   - Reject devices with unregistered buses
   - Delete unused DEVICE_ATTR_PREALLOC()
   - Add low-level device attribute macros with const show/store
     callbacks, allowing device attributes to reside in read-only memory
   - Move core device attributes to read-only memory
   - Constify group array pointers in driver_add_groups() /
     driver_remove_groups(), struct bus_type, and struct device_driver

  device property:
   - Fix fwnode reference leak in fwnode_graph_get_endpoint_by_id()
   - Initialize all fields of fwnode_handle in fwnode_init()
   - Provide swnode_get()/swnode_put() wrappers around kobject_get/put()
   - Allow passing struct software_node_ref_args pointers directly to
     PROPERTY_ENTRY_REF()

  driver_override:
   - Migrate amba, cdx, vmbus, and rpmsg to the generic driver_override
     infrastructure, fixing a UAF from unsynchronized access to
     driver_override in bus match() callbacks
   - Remove the now-unused driver_set_override()

  firmware loader:
   - Fix recursive lock deadlock in device_cache_fw_images() when async
     work falls back to synchronous execution
   - Fix device reference leak in firmware_upload_register()

  platform:
   - Pass KBUILD_MODNAME through the platform driver registration macro
     to create module symlinks in sysfs for built-in drivers; move
     module_kset initialization to a pure_initcall and tegra cbb
     registration to core_initcall to ensure correct ordering
   - Pass THIS_MODULE implicitly through a coresight_init_driver() macro

  sysfs:
   - Upgrade OOB write detection in sysfs_kf_seq_show() from printk to
     WARN
   - Add return value clamping to sysfs_kf_read()

  Rust:
   - ACPI:

     Fix missing match data for PRP0001 by exporting
     acpi_of_match_device()

   - Auxiliary:

     Replace drvdata() with dedicated registration data on
     auxiliary_device. drvdata() exposed the driver's bus device private
     data beyond the driver's own scope, creating ordering constraints
     and forcing the data to outlive all registrations that access it.
     Registration data is instead scoped structurally to the
     Registration object, making lifecycle ordering enforced by
     construction rather than convention.

   - Rust-native device driver lifetimes (HRT):

     Allow Rust device drivers to carry a lifetime parameter on their
     bus device private data, tied to the device binding scope -- the
     interval during which a bus device is bound to a driver. Device
     resources like pci::Bar<'a> and IoMem<'a> can be stored directly in
     the driver's bus device private data with a lifetime bounded by the
     binding scope, so the compiler enforces at build time that they do
     not outlive the binding. This removes Devres indirection from every
     access site and eliminates try_access() failure paths in
     destructors.

     Bus driver traits use a Generic Associated Type (GAT) Data<'bound>
     to introduce the lifetime on the private data, rather than
     parameterizing the Driver trait itself. Auxiliary registration
     data, where the lifetime is not introduced by a trait callback but
     must be threaded through Registration, uses the ForLt trait (a
     type-level abstraction for types generic over a lifetime).

  Misc:
   - Fix DT overlayed devices not probing by reverting the broken
     treewide overlay fix and re-running fw_devlink consumer pickup when
     an overlay is applied to a bound device
   - Use root_device_register() for faux bus root device; add sanity
     check for failed bus init
   - Fix dev_has_sync_state() data race with READ_ONCE() and move it to
     base.h
   - Avoid spurious device_links warning when removing a device while
     its supplier is unbinding
   - Switch ISA bus to dynamic root device
   - Fix suspicious RCU usage in kernfs_put()
   - Remove devcoredump exit callback
   - Constify devfreq_event_class"

* tag 'driver-core-7.2-rc1' of gitolite.kernel.org:pub/scm/linux/kernel/git/driver-core/driver-core: (81 commits)
  software node: allow passing reference args to PROPERTY_ENTRY_REF()
  driver core: platform: set mod_name in driver registration
  coresight: pass THIS_MODULE implicitly through a macro
  kernel: param: initialize module_kset in a pure_initcall
  soc/tegra: cbb: Move driver registration from pure_initcall to core_initcall
  firmware_loader: Fix recursive lock in device_cache_fw_images()
  driver core: Use system_percpu_wq instead of system_wq
  driver core: remove driver_set_override()
  rpmsg: use generic driver_override infrastructure
  Drivers: hv: vmbus: use generic driver_override infrastructure
  cdx: use generic driver_override infrastructure
  amba: use generic driver_override infrastructure
  rust: devres: add 'static bound to Devres<T>
  samples: rust: rust_driver_auxiliary: showcase lifetime-bound registration data
  rust: auxiliary: generalize Registration over ForLt
  rust: types: add `ForLt` trait for higher-ranked lifetime support
  gpu: nova-core: separate driver type from driver data
  samples: rust: rust_driver_pci: use HRT lifetime for Bar
  rust: io: make IoMem and ExclusiveIoMem lifetime-parameterized
  rust: pci: make Bar lifetime-parameterized
  ...
 2026-06-15 12:41:17 +05:30
Thomas Gleixner
c66494c79e - Remove the sifive,fine-ctr-bits property bindings because it is a 
redundant information (Nick Hu)
 
 - Remove the TCIU8 interrupt bindings on Renesas because it should not
   be described as the documentation marked reserved and fix the
   conditional reset line for the RZ/{T2H,N2H} (Cosmin Tanislav)
 
 - Add the StarFive JHB100 clint DT bindings compatible string (Ley
   Foon Tan)
 
 - Extend schema condition for interrupts to cover D1 compatible
   variant an add the D1 hstimer support (Michal Piekos)
 
 - Update the ARM architected timer support to handle the ACPI GTDT v3
   format and the EL2 virtual timer, enabling Linux to use the most
   appropriate timer when running with VHE, while also fixing several
   Device Trees to accurately reflect the underlying hardware (Marc
   Zyngier)
 
 - Cleanup and add the clocksource and the clockevent in the TI DM
   timer (Markus Schneider-Pargmann)
 
 - Add the multiple watchdogs support in the tegra186 and
   tegra234. Dedicate one as a kernel watchdog (Kartik Rajput)
 
 - Add the NXP clocksource selection for the scheduler in the Kconfig
   (Enric Balletbo i Serra)
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Merge tag 'timers-v7.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/daniel.lezcano/linux into timers/clocksource

Pull clocksource/driver updates from Daniel Lezcano:

  - Remove the sifive,fine-ctr-bits property bindings because it is a
    redundant information (Nick Hu)

  - Remove the TCIU8 interrupt bindings on Renesas because it should not
    be described as the documentation marked reserved and fix the
    conditional reset line for the RZ/{T2H,N2H} (Cosmin Tanislav)

  - Add the StarFive JHB100 clint DT bindings compatible string (Ley
    Foon Tan)

  - Extend schema condition for interrupts to cover D1 compatible
    variant an add the D1 hstimer support (Michal Piekos)

  - Update the ARM architected timer support to handle the ACPI GTDT v3
    format and the EL2 virtual timer, enabling Linux to use the most
    appropriate timer when running with VHE, while also fixing several
    Device Trees to accurately reflect the underlying hardware (Marc
    Zyngier)

  - Cleanup and add the clocksource and the clockevent in the TI DM
    timer (Markus Schneider-Pargmann)

  - Add the multiple watchdogs support in the tegra186 and
    tegra234. Dedicate one as a kernel watchdog (Kartik Rajput)

  - Add the NXP clocksource selection for the scheduler in the Kconfig
    (Enric Balletbo i Serra)

Link: https://lore.kernel.org/all/1e55e8d6-8024-4f17-8620-ab3385465d76@oss.qualcomm.com
 2026-06-13 16:24:29 +02:00
Rafael J. Wysocki
615f90d3b1 Merge branches 'acpi-processor', 'acpi-cppc' and 'acpi-pci' 
Merge an ACPI processor driver update, two ACPI CPPC library updates
and ACPI PCI/CXL support updates for 7.2-rc1:

 - Add cpuidle driver check in acpi_processor_register_idle_driver() to
   avoid evaluating _CST unnecessarily (Tony W Wang-oc)

 - Suppress UBSAN warning caused by field misuse during PCC-based
   register access in the ACPI CPPC library (Jeremy Linton)

 - Add support for CPPC v4 to the ACPI CPPC library (Sumit Gupta)

 - Update the ACPI device enumeration code to honor _DEP for ACPI0016
   PCI/CXL host bridges and make the ACPI PCI root driver clear _DEP
   dependencies for PCI roots that have become operational (Chen Pei)

* acpi-processor:
  ACPI: processor: Add cpuidle driver check in acpi_processor_register_idle_driver()

* acpi-cppc:
  ACPI: CPPC: Suppress UBSAN warning caused by field misuse
  ACPI: CPPC: Add support for CPPC v4

* acpi-pci:
  ACPI: scan: Honor _DEP for ACPI0016 PCI/CXL host bridge
  ACPI: PCI: Clear _DEP dependencies after PCI root bridge attach
 2026-06-11 15:34:30 +02:00
Rafael J. Wysocki
43e64fbd28 Merge branch 'acpi-button' 
Merge ACPI button driver updates for 7.2-rc1:

 - Clean up lid handling in the ACPI button driver and
   acpi_button_probe(), reorganize installing and removing event
   handlers in that driver and switch it over to using devres-based
   resource management during probe (Rafael Wysocki)

* acpi-button:
  ACPI: button: Switch over to devres-based resource management
  ACPI: button: Reorganize installing and removing event handlers
  ACPI: button: Use string literals for generating netlink messages
  ACPI: button: Clean up adding and removing lid procfs interface
  ACPI: button: Merge two switch () statements in acpi_button_probe()
  ACPI: button: Drop redundant variable from acpi_button_probe()
  ACPI: button: Rework device verification during probe
  ACPI: button: Use local pointer to platform device dev field in probe
  ACPI: button: Eliminate redundant conditional statement
  ACPI: button: Change return type of two functions to void
  ACPI: button: Eliminate ternary operator from acpi_lid_evaluate_state()
  ACPI: button: Use bool for representing boolean values
  ACPI: button: Improve warning message regarding lid state
  ACPI: button: Pass ACPI handle to acpi_lid_evaluate_state()
  ACPI: button: Fix lid_device value leak past driver removal
 2026-06-11 15:30:25 +02:00
Rafael J. Wysocki
9a0d10fed1 Merge branch 'acpi-driver' 
Merge updates of core ACPI device drivers for 7.2-rc1:

 - Fix multiple issues related to probe, removal and missing NVDIMM
   device notifications in the ACPI NFIT driver (Rafael Wysocki)

 - Add support for devres-based management of ACPI notify handlers to
   the ACPI core (Rafael Wysocki)

 - Switch multiple core ACPI device drivers (including the ACPI PAD,
   ACPI video bus, ACPI HED, ACPI thermal zone, ACPI AC, ACPI battery,
   and ACPI NFIT drivers) over to using devres-based resource management
   during probe (Rafael Wysocki)

 - Replace mutex_lock/unlock() with guard()/scoped_guard() in the ACPI
   PMIC driver (Maxwell Doose)

 - Fix message kref handling in the dead device path of the ACPI IPMI
   address space handler (Yuho Choi)

 - Use sysfs_emit() in idlecpus_show() in the ACPI processor aggregator
   device (PAD) driver (Yury Norov)

 - Clean up device_id_scheme initialization in the ACPI video bus driver
   (Jean-Ralph Aviles)

* acpi-driver: (26 commits)
  ACPI: IPMI: Fix message kref handling on dead device
  ACPI: NFIT: core: Fix possible deadlock and missing notifications
  ACPI: NFIT: core: Eliminate redundant local variable
  ACPI: NFIT: core: Fix acpi_nfit_init() error cleanup
  ACPI: NFIT: core: Fix possible NULL pointer dereference
  ACPI: bus: Clean up devm_acpi_install_notify_handler()
  ACPI: PAD: Use sysfs_emit() in idlecpus_show()
  ACPI: video: Do not initialise device_id_scheme directly
  ACPI: video: Switch over to devres-based resource management
  ACPI: video: Use devm for video->entry and backlight cleanup
  ACPI: video: Use devm action for freeing video devices
  ACPI: video: Use devm action for video bus object cleanup
  ACPI: video: Rearrange probe and remove code
  ACPI: video: Reduce the number of auxiliary device dereferences
  ACPI: PAD: Switch over to devres-based resource management
  ACPI: PAD: Fix teardown ordering in acpi_pad_remove()
  ACPI: PAD: Pass struct device pointer to acpi_pad_notify()
  ACPI: PAD: Rearrange acpi_pad_notify()
  ACPI: thermal: Switch over to devres-based resource management
  ACPI: HED: Switch over to devres-based resource management
  ...
 2026-06-11 15:17:57 +02:00
Rafael J. Wysocki
fc041c6931 Merge branch 'acpica' 
Merge ACPICA updates for 7.2-rc1 including the following changes:

 - Add support for the Legacy Virtual Register (LVR) field in I2C serial
   bus resource descriptors to ACPICA (Akhil R)

 - Fix multiple issues related to bounds checks, input validation,
   use-after-free, and integer overflow checks in the AML interpreter
   in ACPICA (ikaros)

 - Update the copyright year to 2026 in ACPICA files and make minor
   changes related to ACPI 6.6 support (Pawel Chmielewski)

 - Remove spurious precision from format used to dump parse trees in
   ACPICA (David Laight)

 - Add modern standby DSM GUIDs to ACPICA header files (Daniel Schaefer)

 - Fix FADT 32/64X length mismatch warning in ACPICA (Abdelkader Boudih)

 - Update D3hot/cold device power states definitions in ACPICA header
   files (Aymeric Wibo)

 - Fix NULL pointer dereference in acpi_ns_custom_package() (Weiming
   Shi)

 - Update ACPICA version to 20260408 (Saket Dumbre)

* acpica: (27 commits)
  ACPICA: add boundary checks in two places
  ACPICA: Add package limit checks in parser functions
  ACPICA: Update version to 20260408
  ACPICA: Update the copyright year to 2026
  ACPICA: Remove spurious precision from format used to dump parse trees
  ACPICA: Enhance OEM ID and Table ID validation in acpi_ex_load_table_op()
  ACPICA: Fix NULL pointer dereference in acpi_ns_custom_package()
  ACPICA: Enhance buffer validation in acpi_ut_walk_aml_resources()
  ACPICA: Add validation for node in acpi_ns_build_normalized_path()
  ACPICA: validate handler object type in two places
  ACPICA: Improve argument parsing in acpi_ps_get_next_simple_arg()
  ACPICA: Fix integer overflow in acpi_ex_opcode_3A_1T_1R() (mid_op)
  ACPICA: Prevent adding invalid references
  ACPICA: add boundary checks in acpi_ps_get_next_field()
  ACPICA: validate byte_count in acpi_ps_get_next_package_length()
  ACPICA: Fix use-after-free in acpi_ds_terminate_control_method()
  ACPICA: fix I2C LVR item count in the conversion table
  ACPICA: Mention the LVR bits
  ACPICA: Change LVR to 8 bit value
  ACPICA: Fetch LVR I2C resource descriptor
  ...
 2026-06-11 14:57:55 +02:00
Tony W Wang-oc
66c62e6773 ACPI: processor: Add cpuidle driver check in acpi_processor_register_idle_driver() 
Commit 7a8c994cbb ("ACPI: processor: idle: Optimize ACPI idle
driver registration") moved the ACPI idle driver registration to
acpi_processor_driver_init(), but it didn't check whether a cpuidle
driver was already registered.

For example, on Intel platforms, if the intel_idle driver is already
loaded, the code would still evaluate the _CST object in the ACPI
table and attempt to register the acpi_idle driver. This registration
would fail with -EBUSY due to the existing check in cpuidle_register_driver.

Add a check at the beginning of acpi_processor_register_idle_driver()
to avoid unnecessary _CST evaluate and potential registration failures.

Fixes: 7a8c994cbb ("ACPI: processor: idle: Optimize ACPI idle driver registration")
Signed-off-by: Tony W Wang-oc <TonyWWang-oc@zhaoxin.com>
Link: https://patch.msgid.link/20260608190359.3254-1-TonyWWang-oc@zhaoxin.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
 2026-06-08 14:42:07 +02:00
Yuho Choi
63320db6a5 ACPI: IPMI: Fix message kref handling on dead device 
acpi_ipmi_space_handler() takes an extra reference on tx_msg before
checking whether the selected IPMI device is dead. The reference
belongs to the tx_msg_list entry and is normally dropped by
ipmi_cancel_tx_msg() or ipmi_flush_tx_msg() after the message is removed
from the list.

On the dead-device path, the message has not been queued yet, but the
error path still calls ipmi_msg_release() directly. That bypasses
kref_put() and frees tx_msg while the queued-message reference is still
recorded in the kref count.

Take the queued-message reference only after the dead-device check
succeeds, immediately before adding tx_msg to the list.

Fixes: 7b98447722 ("ACPI / IPMI: Add reference counting for ACPI IPMI transfers")
Signed-off-by: Yuho Choi <dbgh9129@gmail.com>
Link: https://patch.msgid.link/20260603163108.2149359-1-dbgh9129@gmail.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
 2026-06-08 14:35:11 +02:00
Jeremy Linton
1b1acf2dad ACPI: CPPC: Suppress UBSAN warning caused by field misuse 
The definition of reg->access_width changes depending on the
reg->space_id type.  Type ACPI_ADR_SPACE_PLATFORM_COMM uses
access_width to indicate the PCC region, which can result in a UBSAN
if the value is greater than 4.

For example:

 UBSAN: shift-out-of-bounds in drivers/acpi/cppc_acpi.c:1090:9
 shift exponent 32 is too large for 32-bit type 'int'
 CPU: 61 UID: 0 PID: 1220 Comm: (udev-worker) Not tainted 7.0.10-201.fc44.aarch64 #1 PREEMPT(lazy)
 Hardware name: To be filled by O.E.M.
 Call trace:
  ...(trimming)
  ubsan_epilogue+0x10/0x48
  __ubsan_handle_shift_out_of_bounds+0xdc/0x1e0
  cpc_write+0x4d0/0x670
  cppc_set_perf+0x18c/0x490
  cppc_cpufreq_cpu_init+0x1c8/0x380 [cppc_cpufreq]
  ... (trimming)

Lets fix this by validating the region type, as well as whether
access_width has a value. Then since we are returning bit_width
directly for ACPI_ADR_SPACE_PLATFORM_COMM, drop the code correcting
the size.

Fixes: 2f4a4d63a1 ("ACPI: CPPC: Use access_width over bit_width for system memory accesses")
Signed-off-by: Jeremy Linton <jeremy.linton@arm.com>
Tested-by: Jarred White <jarredwhite@linux.microsoft.com>
Reviewed-by: Jarred White <jarredwhite@linux.microsoft.com>
Reviewed-by: Easwar Hariharan <easwar.hariharan@linux.microsoft.com>
Cc: All applicable <stable@vger.kernel.org>
Link: https://patch.msgid.link/20260601235808.1113137-1-jeremy.linton@arm.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
 2026-06-08 14:24:51 +02:00
Miguel Vadillo
c28527ce5d ACPI: scan: Honor _DEP for Intel CVS devices 
CVS (Computer Vision Sensing) is an ACPI-enumerated device that sits
inline in the CSI-2 path between the camera sensor and Intel IPU.
On platforms where CVS is present, the camera sensor's ACPI node
declares a _DEP dependency on the CVS device.

The CVS driver must be fully initialized before camera sensor drivers
probe, because CVS controls the CSI-2 link ownership handshake (via
GPIO REQ/RESP), the MIPI/CSI-2 lane configuration, and the camera
power domain. Without CVS ready, the sensor driver can bind but the
CSI-2 stream will not function correctly.

The CVS driver calls acpi_dev_clear_dependencies() at the end of its
probe() to unblock waiting consumers once it is ready.

Move the CVS HIDs from acpi_ignore_dep_ids[] to acpi_honor_dep_ids[]
so that camera sensor enumeration is deferred until the CVS driver has
finished probing, matching the behavior already in place for IVSC.

Signed-off-by: Miguel Vadillo <miguel.vadillo@intel.com>
Reviewed-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Link: https://patch.msgid.link/20260601194040.18223-1-miguel.vadillo@intel.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
 2026-06-08 14:19:30 +02:00
Rafael J. Wysocki
18a00ed0e7 ACPI: NFIT: core: Fix possible deadlock and missing notifications 
After commit 9b311b7313 ("ACPI: NFIT: Install Notify() handler before
getting NFIT table"), ACPI NFIT driver removal may deadlock if an ACPI
notify on the NFIT device is triggered concurrently.  A similar deadlock
may occur if an ACPI notify on the NFIT device is triggered during a
failing driver probe.

The deadlock is possible because acpi_dev_remove_notify_handler() calls
acpi_os_wait_events_complete() after removing the notify handler and the
driver core invokes it under the NFIT platform device lock which is also
acquired by acpi_nfit_notify().  Thus acpi_os_wait_events_complete() may
be waiting for acpi_nfit_notify() to complete, but the latter may not be
able to acquire the device lock which is being held by the driver core
while the former is being executed.

Moreover, after commit 03667e146f ("ACPI: NFIT: core: Convert the
driver to a platform one"), there are no sysfs notifications regarding
NVDIMM devices because __acpi_nvdimm_notify() always bails out after
checking the driver data pointer of the device's parent.  That parent
is the ACPI companion of the platform device used for driver binding,
so its driver data pointer is always NULL after the commit in question
which was overlooked by it.

A remedy for the deadlock is to use a special separate lock for ACPI
notify synchronization with driver probe and removal instead of the
device lock of the NFIT device, while a remedy for the second issue
is to populate the driver data pointer of the NFIT device's ACPI
companion when the driver is ready to operate, so do both these things.
However, since the new lock is not held across the entire teardown and
acpi_nfit_notify() should do nothing when teardown is in progress, make
it check the driver data pointer of the NFIT device's ACPI companion, in
analogy with the existing check in __acpi_nvdimm_notify(), and bail out
if that pointer is NULL.

Fixes: 9b311b7313 ("ACPI: NFIT: Install Notify() handler before getting NFIT table")
Fixes: 03667e146f ("ACPI: NFIT: core: Convert the driver to a platform one")
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Cc: All applicable <stable@vger.kernel.org> # 9995e4404ea4: ACPI: NFIT: core: Eliminate redundant local variable
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Link: https://patch.msgid.link/3420096.aeNJFYEL58@rafael.j.wysocki
 2026-06-08 14:14:45 +02:00
Rafael J. Wysocki
9995e4404e ACPI: NFIT: core: Eliminate redundant local variable 
Eliminate local variable acpi_desc from __acpi_nvdimm_notify() because it
is redundant (its value is only checked against NULL once and the value
assigned to it may be checked directly instead) and update the subsequent
comment to reflect the code change.

No functional impact.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Link: https://patch.msgid.link/14028918.uLZWGnKmhe@rafael.j.wysocki
 2026-06-08 14:13:57 +02:00
Rafael J. Wysocki
38bf27511e ACPI: NFIT: core: Fix acpi_nfit_init() error cleanup 
If acpi_nfit_init() fails after adding the acpi_desc object to the
acpi_descs list, that object is never removed from that list because
the acpi_nfit_shutdown() devm action is not added for the NFIT device
in that case.  Next, the acpi_nfit_init() failure causes
acpi_nfit_probe() to fail, the acpi_desc object is freed, and a
dangling pointer is left behind in the acpi_descs.  Any subsequent
ACPI Machine Check Exception will trigger nfit_handle_mce() which
iterates over acpi_descs and so a use-after-free will occur.

Moreover, if acpi_nfit_probe() returns 0 after installing a notify
handler for the NFIT device and without allocating the acpi_desc
object and setting the NFIT device's driver data pointer, the
acpi_desc object will be allocated by acpi_nfit_update_notify()
and acpi_nfit_init() will be called to initialize it.  Regardless
of whether or not acpi_nfit_init() fails in that case, the
acpi_nfit_shutdown() devm action is not added for the NFIT device
and acpi_desc is never removed from the acpi_descs list.  If the
acpi_desc object is freed subsequently on driver removal, any
subsequent ACPI MCE will lead to a use-after-free like in the
previous case.

To address the first issue mentioned above, make acpi_nfit_probe()
call acpi_nfit_shutdown() directly on acpi_nfit_init() failures and
to address the other one, add a remove callback to the driver and
make it call acpi_nfit_shutdown().  Also, since it is now possible to
pass NULL to acpi_nfit_shutdown() or the acpi_desc object passed to it
may not have been initialized, add checks against NULL for acpi_desc and
its nvdimm_bus field to that function and make acpi_nfit_unregister()
clear the latter after unregistering the NVDIMM bus.

Fixes: a61fe6f790 ("nfit, tools/testing/nvdimm: unify common init for acpi_nfit_desc")
Fixes: fbabd829fe ("acpi, nfit: fix module unload vs workqueue shutdown race")
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Cc: All applicable <stable@vger.kernel.org>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Link: https://patch.msgid.link/1963615.tdWV9SEqCh@rafael.j.wysocki
 2026-06-08 14:13:57 +02:00
Rafael J. Wysocki
027e128abb ACPI: NFIT: core: Fix possible NULL pointer dereference 
After commit 9b311b7313 ("ACPI: NFIT: Install Notify() handler before
getting NFIT table"), acpi_nfit_probe() installs an ACPI notify handler
for the NFIT device before checking the presence of the NFIT table.  If
that table is not there, 0 is returned without allocating the acpi_desc
object and setting the driver data pointer of the NFIT device.  If the
platform firmware triggers an NFIT_NOTIFY_UC_MEMORY_ERROR notification
on the NFIT device at that point, acpi_nfit_uc_error_notify() will
dereference a NULL pointer.

Prevent that from occurring by adding an acpi_desc check against NULL
to acpi_nfit_uc_error_notify().

Fixes: 9b311b7313 ("ACPI: NFIT: Install Notify() handler before getting NFIT table")
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Cc: All applicable <stable@vger.kernel.org>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Link: https://patch.msgid.link/2418508.ElGaqSPkdT@rafael.j.wysocki
 2026-06-08 14:13:57 +02:00
Rafael J. Wysocki
0c3c4c6b2a ACPI: bus: Clean up devm_acpi_install_notify_handler() 
Add a pointer to the struct acpi_device used for installing the ACPI
notify handler to struct acpi_notify_handler_devres so it need not
be retrieved from the owner device via ACPI_COMPANION() in
devm_acpi_notify_handler_release().

While at it, drop the function name from one of the messages printed
by devm_acpi_install_notify_handler() for consistency and fix up white
space in its kerneldoc comment.

No intentional functional impact.

Suggested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://patch.msgid.link/2841496.mvXUDI8C0e@rafael.j.wysocki
 2026-06-08 14:05:39 +02:00
Marc Zyngier
fe15af3e75
ACPI: GTDT: Parse information related to the EL2 virtual timer 
Now that we have a way to identify GTDTv3, allow the information
related to the EL2 virtual timer to be retrieved by the interface
used by the architected timer driver.

Signed-off-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@kernel.org>
Reviewed-by: Sudeep Holla <sudeep.holla@kernel.org>
Reviewed-by: Hanjun Guo <guohanjun@huawei.com>
Link: https://patch.msgid.link/20260523140242.586031-3-maz@kernel.org
 2026-06-03 09:52:55 +02:00
Marc Zyngier
002dcb3a89
ACPI: GTDT: Account for GTDTv3 size when walking the platform timer descriptors 
Since ARMv8.1, the architecture has grown an EL2-private virtual
timer. This has been described in ACPI since ACPI v6.3 and revision
3 of the GTDT table.

An aditional structure was added in ACPICA, though in a rather
bizarre way, and merged in v5.1 as 8f5a14d053 ("ACPICA: ACPI 6.3:
add GTDT Revision 3 support").

Finally plug the table parsing in GTDT, and correct the parsing of
the platform timer subtables to account for the expanded size of
the base table. This also comes with some extra sanitisation of
the table, in the unlikely case someone got it wrong...

Suggested-by: Sudeep Holla <sudeep.holla@kernel.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@kernel.org>
Reviewed-by: Hanjun Guo <guohanjun@huawei.com>
Reviewed-by: Sudeep Holla <sudeep.holla@kernel.org>
Link: https://patch.msgid.link/20260523140242.586031-2-maz@kernel.org
 2026-06-03 09:52:23 +02:00
Rafael J. Wysocki
ec60aaade7 ACPI: button: Switch over to devres-based resource management 
Switch over the ACPI button driver to devres-based resource management
by making the following changes:

 * Use devm_kzalloc() for allocating button object memory.

 * Use devm_input_allocate_device() for allocating the input class
   device object.

 * Turn acpi_lid_remove_fs() into a devm cleanup action added
   by devm_acpi_lid_add_fs() which is a new wrapper around
   acpi_lid_add_fs().

 * Add devm_acpi_button_init_wakeup() for initializing the wakeup source
   and make it add a custom devm action that will automatically remove
   the wakeup source registered by it.

 * Turn acpi_button_remove_event_handler() into a devm cleanup action
   added by devm_acpi_button_add_event_handler() which is a new wrapper
   around acpi_button_add_event_handler().

No intentional functional impact.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://patch.msgid.link/2283436.Mh6RI2rZIc@rafael.j.wysocki
[ rjw: Rebased and removed unnecessary input device parent assignment ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
 2026-06-02 21:07:51 +02:00
Rafael J. Wysocki
0da41a4c6a ACPI: button: Reorganize installing and removing event handlers 
To facilitate subsequent changes, move the code installing and
removing button event handlers into two separate functions called
acpi_button_add_event_handler() and acpi_button_remove_event_handler(),
respectively, and rearrange it to reduce code duplication.

No intentional functional impact.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://patch.msgid.link/2714170.Lt9SDvczpP@rafael.j.wysocki
 2026-06-02 21:07:10 +02:00
Rafael J. Wysocki
dddc802afd ACPI: button: Use string literals for generating netlink messages 
Instead of storing strings that never change later under
acpi_device_class(device) and using them for generating netlink
messages, use pointers to string literals with the same content.

This also allows the clearing of the acpi_device_class(device)
area during driver removal and in the probe rollback path to be
dropped.

No intentional functional impact.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://patch.msgid.link/2070791.usQuhbGJ8B@rafael.j.wysocki
 2026-06-02 21:07:09 +02:00
Rafael J. Wysocki
b398eee7d9 ACPI: button: Clean up adding and removing lid procfs interface 
The procfs interface is only used with lid devices which only becomes
clear after looking into the function bodies of acpi_button_add_fs()
and acpi_button_remove_fs().  Moreover, the only error code returned
by the former of these functions is -ENODEV, so the ret local variable
in it is redundant, and the return type of the latter one can be changed
to void.

Accordingly, rename these functions to acpi_button_add_fs() and
acpi_button_remove_fs(), respectively, move the button->type checks
against ACPI_BUTTON_TYPE_LID from them to their callers, and make
code simplifications as per the above.

No intentional functional impact.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://patch.msgid.link/1869050.VLH7GnMWUR@rafael.j.wysocki
 2026-06-02 21:07:09 +02:00
Rafael J. Wysocki
a99d758f2b ACPI: button: Merge two switch () statements in acpi_button_probe() 
Two switch () statements in acpi_button_probe() operate on the same
value and the statements between them can be reordered with respect
to the second one, so merge them.

No intentional functional impact.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://patch.msgid.link/3352815.5fSG56mABF@rafael.j.wysocki
 2026-06-02 21:07:09 +02:00
Rafael J. Wysocki
aa7d6c0799 ACPI: button: Drop redundant variable from acpi_button_probe() 
Local char pointer called "name" in acpi_button_probe() is redundant
because its value can be assigned directly to input->name and the
latter can be used in the only other place where "name" is read, so
get rid of it.

No intentional functional impact.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://patch.msgid.link/3706239.iIbC2pHGDl@rafael.j.wysocki
 2026-06-02 21:07:09 +02:00
Rafael J. Wysocki
c16c205aeb ACPI: button: Rework device verification during probe 
Instead of manually comparing the primary ID of the device (retuned
by _HID) with each of the device IDs supported by the driver, use
acpi_match_acpi_device() (which includes the ACPI companion device
pointer check against NULL) and store the ACPI button type as
driver_data in button_device_ids[], which allows a multi-branch
conditional statement to be replaced with a switch () one.  However,
to continue preventing successful probing of devices that only have
one of the supported device IDs in their _CID lists, compare the
matched device ID with the primary ID of the device and return an
error if they don't match.

No intentional functional impact.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://patch.msgid.link/7960518.EvYhyI6sBW@rafael.j.wysocki
[ rjw: Fixed button memory leak on probe failure ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
 2026-06-02 21:06:35 +02:00
Sumit Gupta
71e1815113 ACPI: CPPC: Add support for CPPC v4 
CPPC v4 (ACPI 6.6, Section 8.4.6) adds two optional entries to the
_CPC package:

1. OSPM Nominal Performance (8.4.6.1.2.6): A write-only register that
   lets OSPM inform the platform what it considers nominal performance.
   The platform classifies performance above this level as boost and
   below as throttle for its power/thermal decisions.

2. Resource Priority (8.4.6.1.2.7): A Package of Resource Priority
   Register Descriptor sub-packages that allow OSPM to set relative
   priority among processors for shared resources (boost, throttle,
   L2/L3 cache, memory bandwidth). Parsing the full structure is not
   yet supported; such entries are marked as unsupported.

Add v4 _CPC table parsing (25 entries) and update REG_OPTIONAL to
mark the two new registers as optional.

Signed-off-by: Sumit Gupta <sumitg@nvidia.com>
Reviewed-by: Mario Limonciello (AMD) <superm1@kernel.org>
Reviewed-by: Pierre Gondois <pierre.gondois@arm.com>
Link: https://patch.msgid.link/20260527194626.185286-2-sumitg@nvidia.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
 2026-06-01 20:10:05 +02:00
Yury Norov
9eb51a868e ACPI: PAD: Use sysfs_emit() in idlecpus_show() 
idlecpus_show() is a sysfs show callback. Use sysfs_emit() and
cpumask_pr_args() to emit the mask.

This prepares for removing cpumap_print_to_pagebuf().

Signed-off-by: Yury Norov <ynorov@nvidia.com>
[ rjw: Subject tweaks ]
Link: https://patch.msgid.link/20260528183625.870813-6-ynorov@nvidia.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
 2026-06-01 19:43:41 +02:00
Chen Pei
bf5418a5fe ACPI: scan: Honor _DEP for ACPI0016 PCI/CXL host bridge 
CXL root devices (ACPI0017) declare _DEP on their parent ACPI0016
PCI/CXL host bridge so that cxl_acpi probes only after acpi_pci_root
has attached the PCI root and registered it for acpi_pci_find_root().
However, acpi_dev_ready_for_enumeration() only consults dep_unmet
when the supplier's HID is on acpi_honor_dep_ids[]; otherwise the
dependency is silently ignored.

Without honoring the dependency, cxl_acpi can probe before the PCI
root is ready. The resulting CXL topology is broken: decoder targets
read as 0 and no port/endpoint devices appear under
/sys/bus/cxl/devices/.

Add ACPI0016 to acpi_honor_dep_ids[] so the _DEP declared by ACPI0017
is enforced. This relies on the preceding patch ("ACPI: PCI: clear
_DEP dependencies after PCI root bridge attach"), which releases the
dependency once the PCI root is fully enumerated; the two patches
must be applied together.

Signed-off-by: Chen Pei <cp0613@linux.alibaba.com>
Tested-by: Alison Schofield <alison.schofield@intel.com>
Reviewed-by: Alison Schofield <alison.schofield@intel.com>
Link: https://patch.msgid.link/20260526025118.38935-3-cp0613@linux.alibaba.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
 2026-06-01 19:25:37 +02:00
Chen Pei
3a59c3b772 ACPI: PCI: Clear _DEP dependencies after PCI root bridge attach 
PCI root bridges enumerated by acpi_pci_root_add() can be the _DEP
supplier for other ACPI consumers, most notably ACPI0017 CXL root
devices whose probe path depends on acpi_pci_find_root() succeeding.
Once the root bus has been added, those consumers can safely be
enumerated, so notify them by clearing the dependency.

Call acpi_dev_clear_dependencies() at the end of acpi_pci_root_add(),
after pci_bus_add_devices(), following the same pattern used by other
ACPI suppliers such as the EC (drivers/acpi/ec.c) and the ACPI PCI
Link device (drivers/acpi/pci_link.c). The clear is intentionally
done only on the success path; on the error paths the supplier did
not attach and consumers must keep dep_unmet set.

This is a prerequisite for honoring _DEP on ACPI0016 host bridges,
which matters on architectures where the probe order of acpi_pci_root
relative to cxl_acpi is not guaranteed (e.g. RISC-V).

Signed-off-by: Chen Pei <cp0613@linux.alibaba.com>
Suggested-by: Dan Williams (nvidia) <djbw@kernel.org>
Tested-by: Alison Schofield <alison.schofield@intel.com>
Reviewed-by: Alison Schofield <alison.schofield@intel.com>
Link: https://patch.msgid.link/20260526025118.38935-2-cp0613@linux.alibaba.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
 2026-06-01 19:25:37 +02:00
Rafael J. Wysocki
1ad8cdd308 ACPI: button: Use local pointer to platform device dev field in probe 
To avoid dereferencing pdev to get to the target platform device's
dev field in multiple places in acpi_button_probe(), use a local pointer
to that field.

No intentional functional impact.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://patch.msgid.link/2049596.PYKUYFuaPT@rafael.j.wysocki
 2026-06-01 19:17:49 +02:00
Rafael J. Wysocki
d9fa7b95d1 ACPI: button: Eliminate redundant conditional statement 
Simplify do_update initialization in acpi_lid_notify_state() by
assigning the value of the condition it depends on directly to it.

No intentional functional impact.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://patch.msgid.link/10868292.nUPlyArG6x@rafael.j.wysocki
 2026-06-01 19:17:49 +02:00
Rafael J. Wysocki
06bc0064ad ACPI: button: Change return type of two functions to void 
The return value of acpi_lid_notify_state() is always 0, so change
its return type to void.

Moreover, the return value of the only caller of that function,
acpi_lid_update_state(), is never used, so change its return type
to void either.

No intentional functional impact.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://patch.msgid.link/3429748.44csPzL39Z@rafael.j.wysocki
 2026-06-01 19:17:49 +02:00
Rafael J. Wysocki
a2a3659829 ACPI: button: Eliminate ternary operator from acpi_lid_evaluate_state() 
The ternary operator in acpi_lid_evaluate_state() is not actually needed
because the same result can be achieved by applying the !! operator to
the lid_state value, so update the code accordingly.

No intentional functional impact.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://patch.msgid.link/3055906.e9J7NaK4W3@rafael.j.wysocki
 2026-06-01 19:17:49 +02:00
Rafael J. Wysocki
c0e0b84d9e ACPI: button: Use bool for representing boolean values 
Change the data type of the last_state field in struct acpi_button and
the data type of the acpi_lid_notify_state() second argument to bool
because they both are used for storing boolean values.

Update the callers of acpi_lid_notify_state() accordingly and
while at it, remove the unnecessary (void) cast from the
acpi_lid_update_state() call in acpi_lid_initialize_state() for
consistency.

No intentional functional impact.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://patch.msgid.link/2274778.irdbgypaU6@rafael.j.wysocki
 2026-06-01 19:17:49 +02:00