Merge an update fixing typos in ACPI documentation and comments for
6.17-rc1 (Bjorn Helgaas).

* acpi-misc:
  ACPI: Fix typos

Fix typos in documentation and comments.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://patch.msgid.link/20250722132653.GA2781885@bhelgaas
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Merge an update related to ACPI debugging and ACPI documentation updates
for 6.17-rc1:

 - Enable CONFIG_ACPI_DEBUG by default to make it easier to get ACPI
   debug messages from OEM platforms (Mario Limonciello)

 - Fix parent device references in ASL examples in the ACPI
   documentation and fix spelling and style in the gpio-properties
   documentation in firmware-guide (Andy Shevchenko)

* acpi-debug:
  ACPI: Enable CONFIG_ACPI_DEBUG by default

* acpi-docs:
  Documentation: ACPI: Fix parent device references
  Documentation: firmware-guide: gpio-properties: Spelling and style fixes

The _CRS resources in many cases want to have ResourceSource field
to be a type of ACPI String. This means that to compile properly
we need to enclosure the name path into double quotes. This will
in practice defer the interpretation to a run-time stage, However,
this may be interpreted differently on different OSes and ACPI
interpreter implementations. In particular ACPICA might not correctly
recognize the leading '^' (caret) character and will not resolve
the relative name path properly. On top of that, this piece may be
used in SSDTs which are loaded after the DSDT and on itself may also
not resolve relative name paths outside of their own scopes.
With this all said, fix documentation to use fully-qualified name
paths always to avoid any misinterpretations, which is proven to
work.

Fixes: 8eb5c87a92c0 ("i2c: add ACPI support for I2C mux ports")
Reported-by: Yevhen Kondrashyn <e.kondrashyn@gmail.com>
Cc: All applicable <stable@vger.kernel.org>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://patch.msgid.link/20250710170225.961303-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

 - Use consistent style for active-high and active-low
 - For C and ASL code snippets use 4-space indentation consistently
 - Interleave case examples with the explanations of the certain case
 - Remove or add commas when appropriate

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Link: https://patch.msgid.link/20250626130109.215848-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Add documentation based on implementation of EINJv2 as described in ACPI
6.5.A specification.

[Tony: New user interface for device id and syndrome]

Link: https://uefi.org/specs/ACPI/6.5_A/18_Platform_Error_Interfaces.html#error-injection
Co-developed-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Zaid Alali <zaidal@os.amperecomputing.com>
Link: https://patch.msgid.link/20250617193026.637510-8-zaidal@os.amperecomputing.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Document that references to data nodes shall use string-only references
instead of a device reference and a succession of the first package
entries of hierarchical data node references.

Fixes: 9880702d123f ("ACPI: property: Support using strings in reference properties")
Cc: 6.8+ <stable@vger.kernel.org> # 6.8+
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Link: https://patch.msgid.link/20250409084738.3657079-1-sakari.ailus@linux.intel.com
[ rjw: Clarifying edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

The ACPI namespace has always started with LNXSYSTM, not LNXSYSTEM.
Fix the documentation accordingly.

Signed-off-by: John Watts <contact@jookia.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Pull more ACPI updates from Rafael Wysocki:
 "These update ACPI documentation and kerneldoc comments.

  Specifics:

   - Add markup to generate links from footnotes in the ACPI enumeration
     document (Chris Packham)

   - Update the handle_eject_request() kerneldoc comment to document the
     arguments of the function and improve kerneldoc comments for ACPI
     suspend and hibernation functions (Yang Li)"

* tag 'acpi-6.9-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  ACPI: PM: Improve kerneldoc comments for suspend and hibernation functions
  ACPI: docs: enumeration: Make footnotes links
  ACPI: Document handle_eject_request() arguments

Pull CXL updates from Dan Williams:
 "CXL has mechanisms to enumerate the performance characteristics of
  memory devices. Those mechanisms allow Linux to build the equivalent
  of ACPI SRAT, SLIT, and HMAT tables dynamically at runtime. That
  capability is necessary because static ACPI can not represent dynamic
  CXL configurations (and reconfigurations).

  So, building on the v6.8 work to add "Quality of Service" enumeration,
  this update plumbs CXL "access coordinates" (read/write access latency
  and bandwidth) in all the same places that ACPI HMAT feeds similar
  data. Follow-on patches from the -mm side can then use that data to
  feed mechanisms like mm/memory-tiers.c. Greg has acked the touch to
  drivers/base/.

  The other feature update this cycle is support for CXL error injection
  via the ACPI EINJ module. That facility enables injection of bus
  protocol errors provided the user knows the magic address values to
  insert in the interface. To hide that magic, and make this easier to
  use, new error injection attributes were added to CXL debugfs. That
  interface injects the errors relative to a CXL object rather than
  require user tooling to know how to lookup and inject RCRB (Root
  Complex Register Block) addresses into the raw EINJ debugfs interface.
  It received some helpful review comments from Tony, but no explicit
  acks from the ACPI side. The primary user visible change for existing
  EINJ users is that they may find that einj.ko was already loaded by
  cxl_core.ko. Previously, einj.ko was only loaded on demand.

  The usual collection of miscellaneous cleanups are also present this
  cycle.

  Summary:

   - Supplement ACPI HMAT reported memory performance with native CXL
     memory performance enumeration

   - Add support for CXL error injection via the ACPI EINJ mechanism

   - Cleanup CXL DOE and CDAT integration

   - Miscellaneous cleanups and fixes"

* tag 'cxl-for-6.9' of git://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl: (21 commits)
  Documentation/ABI/testing/debugfs-cxl: Fix "Unexpected indentation"
  lib/firmware_table: Provide buffer length argument to cdat_table_parse()
  cxl/pci: Get rid of pointer arithmetic reading CDAT table
  cxl/pci: Rename DOE mailbox handle to doe_mb
  cxl: Fix the incorrect assignment of SSLBIS entry pointer initial location
  cxl/core: Add CXL EINJ debugfs files
  EINJ, Documentation: Update EINJ kernel doc
  EINJ: Add CXL error type support
  EINJ: Migrate to a platform driver
  cxl/region: Deal with numa nodes not enumerated by SRAT
  cxl/region: Add memory hotplug notifier for cxl region
  cxl/region: Add sysfs attribute for locality attributes of CXL regions
  cxl/region: Calculate performance data for a region
  cxl: Set cxlmd->endpoint before adding port device
  cxl: Move QoS class to be calculated from the nearest CPU
  cxl: Split out host bridge access coordinates
  cxl: Split out combine_coordinates() for common shared usage
  ACPI: HMAT / cxl: Add retrieval of generic port coordinates for both access classes
  ACPI: HMAT: Introduce 2 levels of generic port access class
  base/node / ACPI: Enumerate node access class for 'struct access_coordinate'
  ...