linux-kernel - [PATCH v1 00/12] ACPI: DPTF: Move INT340X enumeration from DPTF core to thermal drivers

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Message-ID: <20250830053404.763995-1-srosek@google.com>
Date: Sat, 30 Aug 2025 05:33:52 +0000
From: Slawomir Rosek <srosek@...gle.com>
To: "Rafael J . Wysocki" <rafael@...nel.org>, Alex Hung <alexhung@...il.com>, 
	Hans de Goede <hansg@...nel.org>, Ilpo Jarvinen <ilpo.jarvinen@...ux.intel.com>, 
	AceLan Kao <acelan.kao@...onical.com>, Daniel Lezcano <daniel.lezcano@...aro.org>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Zhang Rui <rui.zhang@...el.com>, 
	Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>, Tomasz Nowicki <tnowicki@...gle.com>, 
	Stanislaw Kardach <skardach@...gle.com>, Michal Krawczyk <mikrawczyk@...gle.com>, 
	linux-kernel@...r.kernel.org, linux-acpi@...r.kernel.org, 
	platform-driver-x86@...r.kernel.org, linux-pm@...r.kernel.org, 
	Slawomir Rosek <srosek@...gle.com>
Subject: [PATCH v1 00/12] ACPI: DPTF: Move INT340X enumeration from DPTF core
 to thermal drivers

The Intel Dynamic Platform and Thermal Framework (DPTF) relies on
the INT340X ACPI device objects. The temperature information and
cooling ability are exposed to the userspace via those objects.

Since kernel v3.17 the ACPI bus scan handler is introduced to prevent
enumeration of INT340X ACPI device objects on the platform bus unless
related thermal drivers are enabled. However, using the IS_ENABLED()
macro in the ACPI scan handler forces the kernel to be recompiled
when thermal drivers are enabled or disabled, which is a significant
limitation of its modularity. The IS_ENABLED() macro is particularly
problematic for the Android Generic Kernel Image (GKI) project which
uses unified core kernel while SoC/board support is moved to loadable
vendor modules.

This patch set moves enumeration of INT340X ACPI device objects on
the platform bus from DPTF core to thermal drivers. It starts with
some code cleanup and reorganization to eventually remove IS_ENABLED()
macro from the ACPI bus scan handler. Brief list of changes is listed
below:

1) Remove SOC DTS thermal driver case from the ACPI scan handler
   since its dependency on INT340X driver is unrelated to DPTF
2) Move all INT340X ACPI device ids to the common header and update
   the DPTF core and thermal drivers accordingly
3) Move dynamic enumeration of ACPI device objects on the platform bus
   from the intel-hid and intel-vbtn drivers to the ACPI platform core
4) Move enumeration of INT340X ACPI device objects on the platform bus
   from DPTF core to thermal drivers using ACPI platform core methods


Slawomir Rosek (12):
  ACPI: DPTF: Ignore SoC DTS thermal while scanning
  ACPI: DPTF: Move INT3400 device IDs to header
  ACPI: DPTF: Move INT3401 device IDs to header
  ACPI: DPTF: Move INT3402 device IDs to header
  ACPI: DPTF: Move INT3403 device IDs to header
  ACPI: DPTF: Move INT3404 device IDs to header
  ACPI: DPTF: Move INT3406 device IDs to header
  ACPI: DPTF: Move INT3407 device IDs to header
  ACPI: DPTF: Move PCH FIVR device IDs to header
  ACPI: DPTF: Remove not supported INT340X IDs
  ACPI: platform: Add macro for acpi platform driver
  ACPI: DPTF: Move INT340X enumeration to modules

 drivers/acpi/acpi_platform.c                  | 27 +++++++
 drivers/acpi/dptf/dptf_pch_fivr.c             | 10 +--
 drivers/acpi/dptf/dptf_power.c                | 20 +----
 drivers/acpi/dptf/int340x_thermal.c           | 76 ++++---------------
 drivers/acpi/fan.h                            | 10 +--
 drivers/acpi/fan_core.c                       |  2 +-
 drivers/acpi/int340x_thermal.h                | 76 +++++++++++++++++++
 drivers/platform/x86/intel/hid.c              | 41 +---------
 drivers/platform/x86/intel/vbtn.c             | 30 +-------
 drivers/thermal/intel/Kconfig                 |  1 +
 .../intel/int340x_thermal/int3400_thermal.c   | 12 +--
 .../intel/int340x_thermal/int3401_thermal.c   |  5 +-
 .../intel/int340x_thermal/int3402_thermal.c   |  5 +-
 .../intel/int340x_thermal/int3403_thermal.c   | 12 +--
 .../intel/int340x_thermal/int3406_thermal.c   |  5 +-
 include/linux/platform_device.h               | 17 +++++
 16 files changed, 161 insertions(+), 188 deletions(-)
 create mode 100644 drivers/acpi/int340x_thermal.h

-- 
2.51.0.318.gd7df087d1a-goog