linux-toradex.git/drivers/platform/x86/lenovo/wmi-capdata.c, branch master Linux kernel for Apalis and Colibri modules ACPI: AC: Define ACPI_AC_CLASS in one place 2026-03-13T15:48:28+00:00 Rafael J. Wysocki rafael.j.wysocki@intel.com 2026-03-13T13:03:46+00:00 236ad358166cca167e6ed33639bb7948e7a2f6fd The ACPI_AC_CLASS symbol is defined in several places in the same way which is rather unfortunate. Instead, define it in one common header file (acpi_bus.h) so that it is accessible to all of its users. No intentional functional impact. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Link: https://patch.msgid.link/6163384.MhkbZ0Pkbq@rafael.j.wysocki 
The ACPI_AC_CLASS symbol is defined in several places in the same way
which is rather unfortunate.

Instead, define it in one common header file (acpi_bus.h) so that it is
accessible to all of its users.

No intentional functional impact.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://patch.msgid.link/6163384.MhkbZ0Pkbq@rafael.j.wysocki
platform/x86: lenovo-wmi-capdata: Wire up Fan Test Data 2026-01-21T08:49:57+00:00 Rong Zhang i@rong.moe 2026-01-20T18:20:07+00:00 67d9a39ce85fafc2d88f82c9229ace111aaa8c1f A capdata00 attribute (0x04050000) describes the presence of Fan Test Data. Query it, and bind Fan Test Data as a component of capdata00 accordingly. The component master of capdata00 may pass a callback while binding to retrieve fan info from Fan Test Data. Summarizing this scheme: lenovo-wmi-other <-> capdata00 <-> capdata_fan |- master |- component | |- sub-master |- sub-component The callback will be called once both the master and the sub-component are bound to the sub-master (component). This scheme is essential to solve these issues: - The component framework only supports one aggregation per master - A binding is only established until all components are found - The Fan Test Data interface may be missing on some devices - To get rid of queries for the presence of WMI GUIDs - The notifier framework cannot cleanly connect capdata_fan to lenovo-wmi-other without introducing assumptions on probing sequence capdata00 is registered as a component and a sub-master on probe, instead of chaining the registrations in one's bind callback. This is because calling (un)registration methods of the component framework causes deadlock in (un)bind callbacks, i.e., it's impossible to register capdata00 as a sub-master/component in its component/sub-master bind callback, and vice versa. Signed-off-by: Rong Zhang <i@rong.moe> Reviewed-by: Derek J. Clark <derekjohn.clark@gmail.com> Tested-by: Derek J. Clark <derekjohn.clark@gmail.com> Link: https://patch.msgid.link/20260120182104.163424-7-i@rong.moe Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> 
A capdata00 attribute (0x04050000) describes the presence of Fan Test
Data. Query it, and bind Fan Test Data as a component of capdata00
accordingly. The component master of capdata00 may pass a callback while
binding to retrieve fan info from Fan Test Data.

Summarizing this scheme:

	lenovo-wmi-other <-> capdata00 <-> capdata_fan
	|- master            |- component  |
	                     |- sub-master |- sub-component

The callback will be called once both the master and the sub-component
are bound to the sub-master (component).

This scheme is essential to solve these issues:
- The component framework only supports one aggregation per master
- A binding is only established until all components are found
- The Fan Test Data interface may be missing on some devices
- To get rid of queries for the presence of WMI GUIDs
- The notifier framework cannot cleanly connect capdata_fan to
  lenovo-wmi-other without introducing assumptions on probing sequence

capdata00 is registered as a component and a sub-master on probe,
instead of chaining the registrations in one's bind callback. This is
because calling (un)registration methods of the component framework
causes deadlock in (un)bind callbacks, i.e., it's impossible to register
capdata00 as a sub-master/component in its component/sub-master bind
callback, and vice versa.

Signed-off-by: Rong Zhang <i@rong.moe>
Reviewed-by: Derek J. Clark <derekjohn.clark@gmail.com>
Tested-by: Derek J. Clark <derekjohn.clark@gmail.com>
Link: https://patch.msgid.link/20260120182104.163424-7-i@rong.moe
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
platform/x86: lenovo-wmi-capdata: Add support for Fan Test Data 2026-01-21T08:49:55+00:00 Rong Zhang i@rong.moe 2026-01-20T18:20:06+00:00 012a8f967a87dea3f25c3a3ae32610c0dd145f34 Add support for LENOVO_FAN_TEST_DATA WMI data block. Provides an interface for querying the min/max fan speed RPM (reference data) of a given fan ID. This interface is optional. Hence, it does not bind to lenovo-wmi-other and is not registered as a component for the moment. Appropriate binding will be implemented in the subsequent patch. Signed-off-by: Rong Zhang <i@rong.moe> Reviewed-by: Derek J. Clark <derekjohn.clark@gmail.com> Tested-by: Derek J. Clark <derekjohn.clark@gmail.com> Link: https://patch.msgid.link/20260120182104.163424-6-i@rong.moe Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> 
Add support for LENOVO_FAN_TEST_DATA WMI data block. Provides an
interface for querying the min/max fan speed RPM (reference data) of a
given fan ID.

This interface is optional. Hence, it does not bind to lenovo-wmi-other
and is not registered as a component for the moment. Appropriate binding
will be implemented in the subsequent patch.

Signed-off-by: Rong Zhang <i@rong.moe>
Reviewed-by: Derek J. Clark <derekjohn.clark@gmail.com>
Tested-by: Derek J. Clark <derekjohn.clark@gmail.com>
Link: https://patch.msgid.link/20260120182104.163424-6-i@rong.moe
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
platform/x86: lenovo-wmi-capdata: Add support for Capability Data 00 2026-01-21T08:49:54+00:00 Rong Zhang i@rong.moe 2026-01-20T18:20:05+00:00 c05f67e6c2e508f5462f30a5394a1607ef683ff9 Add support for LENOVO_CAPABILITY_DATA_00 WMI data block that comes on "Other Mode" enabled hardware. Provides an interface for querying if a given attribute is supported by the hardware, as well as its default value. capdata00 always presents on devices with capdata01. lenovo-wmi-other now binds to both (no functional change intended). Signed-off-by: Rong Zhang <i@rong.moe> Reviewed-by: Derek J. Clark <derekjohn.clark@gmail.com> Tested-by: Derek J. Clark <derekjohn.clark@gmail.com> Link: https://patch.msgid.link/20260120182104.163424-5-i@rong.moe Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> 
Add support for LENOVO_CAPABILITY_DATA_00 WMI data block that comes on
"Other Mode" enabled hardware. Provides an interface for querying if a
given attribute is supported by the hardware, as well as its default
value.

capdata00 always presents on devices with capdata01. lenovo-wmi-other
now binds to both (no functional change intended).

Signed-off-by: Rong Zhang <i@rong.moe>
Reviewed-by: Derek J. Clark <derekjohn.clark@gmail.com>
Tested-by: Derek J. Clark <derekjohn.clark@gmail.com>
Link: https://patch.msgid.link/20260120182104.163424-5-i@rong.moe
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
platform/x86: lenovo-wmi-{capdata,other}: Support multiple Capability Data 2026-01-21T08:49:52+00:00 Rong Zhang i@rong.moe 2026-01-20T18:20:04+00:00 4ff1a029531441a27288eed8ba57d48fe11ba79a The current implementation are heavily bound to capdata01. Rewrite it so that it is suitable to utilize other Capability Data as well. No functional change intended. Signed-off-by: Rong Zhang <i@rong.moe> Reviewed-by: Derek J. Clark <derekjohn.clark@gmail.com> Tested-by: Derek J. Clark <derekjohn.clark@gmail.com> Link: https://patch.msgid.link/20260120182104.163424-4-i@rong.moe Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> 
The current implementation are heavily bound to capdata01. Rewrite it so
that it is suitable to utilize other Capability Data as well.

No functional change intended.

Signed-off-by: Rong Zhang <i@rong.moe>
Reviewed-by: Derek J. Clark <derekjohn.clark@gmail.com>
Tested-by: Derek J. Clark <derekjohn.clark@gmail.com>
Link: https://patch.msgid.link/20260120182104.163424-4-i@rong.moe
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
platform/x86: Rename lenovo-wmi-capdata01 to lenovo-wmi-capdata 2026-01-21T08:49:51+00:00 Rong Zhang i@rong.moe 2026-01-20T18:20:03+00:00 f28d76b17561bd5f1b7b2c8f139a00158218c2d2 Prepare for the upcoming changes to make it suitable to retrieve and provide other Capability Data as well. Signed-off-by: Rong Zhang <i@rong.moe> Reviewed-by: Derek J. Clark <derekjohn.clark@gmail.com> Tested-by: Derek J. Clark <derekjohn.clark@gmail.com> Link: https://patch.msgid.link/20260120182104.163424-3-i@rong.moe Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> 
Prepare for the upcoming changes to make it suitable to retrieve
and provide other Capability Data as well.

Signed-off-by: Rong Zhang <i@rong.moe>
Reviewed-by: Derek J. Clark <derekjohn.clark@gmail.com>
Tested-by: Derek J. Clark <derekjohn.clark@gmail.com>
Link: https://patch.msgid.link/20260120182104.163424-3-i@rong.moe
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>