kernel.git/drivers/acpi, branch master

Merge branches 'acpica' and 'acpi-bus'

2026-03-19T13:57:06Z

Merge an ACPICA fix and a core ACPI support code fix for 7.0-rc5: - Update the format of the last argument of _DSM to avoid printing confusing error messages in some cases (Saket Dumbre) - Fix MFD child automatic modprobe issue by removing a stale check from acpi_companion_match() (Pratap Nirujogi) * acpica: ACPICA: Update the format of Arg3 of _DSM * acpi-bus: ACPI: bus: Fix MFD child automatic modprobe issue

ACPI: bus: Fix MFD child automatic modprobe issue

2026-03-18T10:57:22Z

MFD child devices sharing parent's ACPI Companion fails to probe as acpi_companion_match() returns incompatible ACPI Companion handle for binding with the check for pnp.type.backlight added recently. Remove this pnp.type.backlight check in acpi_companion_match() to fix the automatic modprobe issue. Fixes: 7a7a7ed5f8bdb ("ACPI: scan: Register platform devices for backlight device objects") Signed-off-by: Pratap Nirujogi Link: https://patch.msgid.link/20260318034842.1216536-1-pratap.nirujogi@amd.com Signed-off-by: Rafael J. Wysocki

ACPI: processor: Fix previous acpi_processor_errata_piix4() fix

2026-03-18T10:53:07Z

After commi f132e089fe89 ("ACPI: processor: Fix NULL-pointer dereference in acpi_processor_errata_piix4()"), device pointers may be dereferenced after dropping references to the device objects pointed to by them, which may cause a use-after-free to occur. Moreover, debug messages about enabling the errata may be printed if the errata flags corresponding to them are unset. Address all of these issues by moving message printing to the points in the code where the errata flags are set. Fixes: f132e089fe89 ("ACPI: processor: Fix NULL-pointer dereference in acpi_processor_errata_piix4()") Reported-by: Guenter Roeck Closes: https://lore.kernel.org/linux-acpi/938e2206-def5-4b7a-9b2c-d1fd37681d8a@roeck-us.net/ Reviewed-by: Guenter Roeck Signed-off-by: Rafael J. Wysocki Link: https://patch.msgid.link/5975693.DvuYhMxLoT@rafael.j.wysocki

ACPICA: Update the format of Arg3 of _DSM

2026-03-17T19:51:13Z

To get rid of type incompatibility warnings in Linux. Fixes: 81f92cff6d42 ("ACPICA: ACPI_TYPE_ANY does not include the package type") Link: https://github.com/acpica/acpica/commit/4fb74872dcec Signed-off-by: Saket Dumbre Signed-off-by: Rafael J. Wysocki Link: https://patch.msgid.link/12856643.O9o76ZdvQC@rafael.j.wysocki

Merge branch 'acpi-osl'

2026-03-12T17:42:41Z

Merge an ACPI OS services layer (OSL) fix that addresses sparse warnings in acpi_os_initialize() (Ben Dooks) * acpi-osl: ACPI: OSL: fix __iomem type on return from acpi_os_map_generic_address()

ACPI: OSL: fix __iomem type on return from acpi_os_map_generic_address()

2026-03-11T11:30:45Z

The pointer returned from acpi_os_map_generic_address() is tagged with __iomem, so make the rv it is returned to also of void __iomem * type. Fixes the following sparse warning: drivers/acpi/osl.c:1686:20: warning: incorrect type in assignment (different address spaces) drivers/acpi/osl.c:1686:20: expected void *rv drivers/acpi/osl.c:1686:20: got void [noderef] __iomem * Fixes: 6915564dc5a8 ("ACPI: OSL: Change the type of acpi_os_map_generic_address() return value") Signed-off-by: Ben Dooks [ rjw: Subject tweak, added Fixes tag ] Link: https://patch.msgid.link/20260311105835.463030-1-ben.dooks@codethink.co.uk Signed-off-by: Rafael J. Wysocki

ACPI: video: Switch over to auxiliary bus type

2026-03-10T14:08:21Z

Commit 02c057ddefef ("ACPI: video: Convert the driver to a platform one") switched over the ACPI video bus driver from an ACPI driver to a platform driver, but that change introduced an unwanted and unexpected side effect. Namely, on some systems, the ACPI device object of the ACPI video bus device is an ACPI companion of multiple platform devices and, after adding video_device_ids[] as an acpi_match_table to the acpi_video_bus platform driver, all of those devices started to match that driver and its probe callback is invoked for all of them (it fails, but it leaves a confusing message in the log). Moreover, the MODULE_DEVICE_TABLE() of the ACPI video driver module matches all of the devices sharing the ACPI companion with the ACPI video bus device. To address this, make the core ACPI device enumeration code create an auxiliary device for the ACPI video bus device object instead of a platform device and switch over the ACPI video bus driver (once more) to an auxiliary driver. Auxiliary driver generally is a better match for ACPI video bus than platform driver, among other things because the ACPI video bus device does not require any resources to be allocated for it during enumeration. It also allows the ACPI video bus driver to stop abusing device matching based on ACPI device IDs and it allows a special case to be dropped from acpi_create_platform_device() because that function need not worry about the ACPI video bus device any more. Fixes: 02c057ddefef ("ACPI: video: Convert the driver to a platform one") Reported-by: Pratap Nirujogi Closes: https://lore.kernel.org/linux-acpi/007e3390-6b2b-457e-83c7-c794c5952018@amd.com/ Tested-by: Pratap Nirujogi Signed-off-by: Rafael J. Wysocki Reviewed-by: Mario Limonciello (AMD) [ rjw: Added AUXILIARY_BUS selection to CONFIG_ACPI to fix build issue ] [ rjw: Fixed error path in acpi_create_video_bus_device() ] Link: https://patch.msgid.link/5986516.DvuYhMxLoT@rafael.j.wysocki Signed-off-by: Rafael J. Wysocki

Merge branch 'acpica'

2026-03-05T17:46:43Z

Merge a fix updating the _CPC object definition in ACPICA to avoid printing a false-positive output package format warning on new platforms (Saket Dumbre) * acpica: ACPICA: Update the _CPC definition to match ACPI 6.6

Revert "ACPI: PM: Let acpi_dev_pm_attach() skip devices without ACPI PM"

2026-03-03T14:32:53Z

Revert commit 88fad6ce090b ("ACPI: PM: Let acpi_dev_pm_attach() skip devices without ACPI PM") that introduced a SoundWire suspend regression [1]. It is actually not true that the commit above doesn't make a functional difference because acpi_subsys_suspend(), for example, may resume devices in runtime-suspend which affects the subsequent handling of those devices during the suspend transition. For this reason, the devices that were handled by the ACPI PM domain before that commit may be handled differently now which may lead to suspend-resume issues. Fixes: 88fad6ce090b ("ACPI: PM: Let acpi_dev_pm_attach() skip devices without ACPI PM") Reported-by: Péter Ujfalusi Closes: https://github.com/thesofproject/linux/pull/5677#issuecomment-3984375077 [1] Signed-off-by: Rafael J. Wysocki Link: https://patch.msgid.link/2829615.mvXUDI8C0e@rafael.j.wysocki

ACPICA: Update the _CPC definition to match ACPI 6.6

2026-03-02T21:02:35Z

Update the _CPC definition to also support return package sub-type of a Package (with Integer and Buffer) as per ACPI Spec 6.6. Link: https://github.com/acpica/acpica/commit/17a761944cc2 Signed-off-by: Saket Dumbre Signed-off-by: Rafael J. Wysocki Link: https://patch.msgid.link/2829238.mvXUDI8C0e@rafael.j.wysocki