linux.git/drivers/acpi/internal.h, branch v6.8

Merge branch 'acpi-thermal'

2024-01-04T12:01:51+00:00

Merge ACPI thermal zone driver updates for 6.8-rc1:

 - Use generic ACPI helpers for evaluating trip point temperature
   objects in the ACPI thermal zone driver (Rafael J. Wysockii, Arnd
   Bergmann).

 - Add Thermal fast Sampling Period (_TFP) support to the ACPI thermal
   zone driver (Jeff Brasen).

* acpi-thermal:
  ACPI: thermal_lib: include "internal.h" for function prototypes
  ACPI: thermal: Add Thermal fast Sampling Period (_TFP) support
  ACPI: thermal: Use library functions to obtain trip point temperature values
  ACPI: thermal_lib: Add functions returning temperature in deci-Kelvin
  thermal: ACPI: Move the ACPI thermal library to drivers/acpi/

Merge branches 'acpi-scan' and 'acpi-processor'

2024-01-04T11:29:52+00:00

Merge ACPI device enumeration updates and ACPI processor driver updates
for 6.8-rc1:

 - Add CSI-2 and DisCo for Imaging support to the ACPI device
   enumeration code (Sakari Ailus, Rafael J. Wysocki).

 - Adjust the cpufreq thermal reduction algorithm in the ACPI processor
   driver for Tegra241 (Srikar Srimath Tirumala, Arnd Bergmann).

 - Make acpi_proc_quirk_mwait_check() x86-specific (Rafael J. Wysocki).

* acpi-scan:
  ACPI: scan: Fix an error message in DisCo for Imaging support
  ACPI: property: Replicate DT-aligned u32 properties from DisCo for Imaging
  ACPI: property: Dig "rotation" property for devices with CSI2 _CRS
  ACPI: scan: Extract MIPI DisCo for Imaging data into swnodes
  device property: Add SOFTWARE_NODE() macro for defining software nodes
  ACPI: scan: Extract _CRS CSI-2 connection information into swnodes
  ACPI: scan: Extract CSI-2 connection graph from _CRS
  ACPI: property: Support using strings in reference properties

* acpi-processor:
  ACPI: arm64: export acpi_arch_thermal_cpufreq_pctg()
  ACPI: processor: reduce CPUFREQ thermal reduction pctg for Tegra241
  ACPI: processor: Provide empty stub of acpi_proc_quirk_mwait_check()

ACPI: processor: reduce CPUFREQ thermal reduction pctg for Tegra241

2023-12-06T19:52:47+00:00

Current implementation of processor_thermal performs software throttling
in fixed steps of "20%" which can be too coarse for some platforms.
We observed some performance gain after reducing the throttle percentage.
Change the CPUFREQ thermal reduction percentage and maximum thermal steps
to be configurable. Also, update the default values of both for Nvidia
Tegra241 (Grace) SoC. The thermal reduction percentage is reduced to "5%"
and accordingly the maximum number of thermal steps are increased as they
are derived from the reduction percentage.

Signed-off-by: Srikar Srimath Tirumala 
Co-developed-by: Sumit Gupta 
Signed-off-by: Sumit Gupta 
Acked-by: Sudeep Holla 
Acked-by: Hanjun Guo 
Signed-off-by: Rafael J. Wysocki

ACPI: processor: Provide empty stub of acpi_proc_quirk_mwait_check()

2023-11-22T15:30:02+00:00

Commit 0a0e2ea642f6 ("ACPI: processor: Move MWAIT quirk out of
acpi_processor.c") added acpi_proc_quirk_mwait_check() that is
only defined for x86 and is unlikely to be defined for any other
architectures, so put it under #ifdef CONFIG_X86 and provide
an empty stub implementation of it for the other cases.

This is kind of orthogonal to [1], because if any architectures other
than x86 decide to use the processor _OSC, they will see the reported
build error.

Link: https://lore.kernel.org/lkml/c7a05a44-c0be-46c2-a21d-b242524d482b@roeck-us.net
Link: https://git.kernel.org/pub/scm/linux/kernel/git/ardb/linux.git/commit/?h=remove-ia64&id=a0334bf78b95532cec54f56b53e8ae1bfe7e1ca1 # [1]
Signed-off-by: Rafael J. Wysocki

ACPI: thermal: Use library functions to obtain trip point temperature values

2023-11-21T14:04:25+00:00

Modify the ACPI thermal driver to use functions from the ACPI thermal
library to obtain trip point temperature values instead of duplicating
them locally.

Among other things, this requires the functions in question to be
exported to it, because it can be built as a module.

It effectively changes the behavior of the driver to treat temperature
values out of the reasonable range (-55 centigrade to 175 centigrade) as
invalid, but there is no other expected functional impact.

Signed-off-by: Rafael J. Wysocki

ACPI: scan: Extract MIPI DisCo for Imaging data into swnodes

2023-11-20T15:50:48+00:00

Add information extracted from the MIPI DisCo for Imaging device
properties to software nodes created during the CSI-2 connection graph
discovery.

Link: https://www.mipi.org/specifications/mipi-disco-imaging
Co-developed-by: Sakari Ailus 
Signed-off-by: Sakari Ailus 
Signed-off-by: Rafael J. Wysocki 
Tested-by: Sakari Ailus

ACPI: scan: Extract CSI-2 connection graph from _CRS

2023-11-20T15:50:47+00:00

Find ACPI CSI-2 resource descriptors defined since ACPI 6.4 (for
CSI-2 and camera configuration) in _CRS for all device objects in
the given scope of the ACPI namespace that have them, identify the
corresponding "remote endpoint" device objects for them and
allocate memory for software nodes needed to create a DT-like data
structure representing the CSI-2 connection graph for drivers.

The code needed to populate these software nodes will be added by
subsequent change sets.

Link: https://uefi.org/specs/ACPI/6.5/06_Device_Configuration.html#camera-serial-interface-csi-2-connection-resource-descriptor
Co-developed-by: Sakari Ailus 
Signed-off-by: Sakari Ailus 
Signed-off-by: Rafael J. Wysocki 
Tested-by: Sakari Ailus

Merge branches 'acpi-scan', 'acpi-tad', 'acpi-extlog' and 'acpi-misc'

2023-08-25T18:49:52+00:00

Merge ACPI device enumeration changes, ACPI TAD and extlog drivers
updates, and miscellaneous ACPI-related changes for 6.6-rc1:

 - Defer enumeration of devices with _DEP pointing to IVSC (Wentong Wu).

 - Install SystemCMOS address space handler for ACPI000E (TAD) to meet
   platform firmware expectations on some platforms (Zhang Rui).

 - Fix finding the generic error data in the ACPi extlog driver for
   compatibility with old and new firmware interface versions (Xiaochun
   Lee).

 - Remove assorted unused declarations of functions (Yue Haibing).

 - Move AMBA bus scan handling into arm64 specific directory (Sudeep
   Holla).

* acpi-scan:
  ACPI: scan: Defer enumeration of devices with a _DEP pointing to IVSC device

* acpi-tad:
  ACPI: TAD: Install SystemCMOS address space handler for ACPI000E

* acpi-extlog:
  ACPI: extlog: Fix finding the generic error data for v3 structure

* acpi-misc:
  ACPI: Remove assorted unused declarations of functions
  ACPI: Remove unused extern declaration acpi_paddr_to_node()
  ACPI: Move AMBA bus scan handling into arm64 specific directory

ACPI: Remove assorted unused declarations of functions

2023-08-17T17:51:44+00:00

acpi_create_dir()/acpi_remove_dir() are never implemented since
the beginning of git history.

Commit f8d31489629c ("ACPICA: Debugger: Convert some mechanisms to OSPM specific")
declared but never implemented acpi_run_debugger().

Commit 781d737c7466 ("ACPI: Drop power resources driver")
removed acpi_power_init() but not its declaration.

Signed-off-by: Yue Haibing 
[ rjw: Subject edits ]
Signed-off-by: Rafael J. Wysocki

ACPI: Move AMBA bus scan handling into arm64 specific directory

2023-08-01T11:59:25+00:00

Commit fcea0ccf4fd7 ("ACPI: bus: Consolidate all arm specific
initialisation into acpi_arm_init()") moved all of the ARM-specific
initialization into acpi_arm_init(). However, acpi_amba.c being outside
of drivers/acpi/arm64 got ignored and hence acpi_amba_init() was not
moved into acpi_arm_init().

Move the AMBA platform bus support into arm64 specific folder and make
acpi_amba_init() part of acpi_arm_init().

Signed-off-by: Sudeep Holla 
Signed-off-by: Rafael J. Wysocki