ACPI(4) - Device Drivers Manual #

ACPI(4) - Device Drivers Manual

NAME #

acpi - Advanced Configuration and Power Interface

SYNOPSIS #

acpi0 at bios?

DESCRIPTION #

The acpi driver provides basic support for ACPI including loading ACPI tables from the firmware, parsing and interpreting AML code, event handling, suspending and powering off, and attaching device drivers. Userland may access acpi by using the apm(4) device.

The following devices can attach to acpi:

abl(4)

Apple backlight support

acpiac(4)

ACPI AC adapter

acpials(4)

ACPI ambient light sensor

acpiasus(4)

ASUS ACPI hotkeys

acpibat(4)

ACPI control method battery

acpibtn(4)

ACPI button

acpicbkbd(4)

Chromebook keyboard backlight

acpicpu(4)

ACPI processor power and performance state

acpidock(4)

ACPI docking station

acpiec(4)

ACPI embedded controller

acpige(4)

ACPI generic event device

acpihid(4)

ACPI HID event and 5-button array

acpihpet(4)

ACPI high precision event timer

acpihve(4)

Hyper-V entropy

acpimadt(4)

ACPI APIC configuration

acpimcfg(4)

ACPI PCI Express configuration space

acpipci(4)

ACPI PCI host bridge

acpiprt(4)

ACPI PCI routing table configuration

acpipwrres(4)

ACPI power resources

acpisbs(4)

ACPI Smart Battery subsystem

acpisony(4)

Sony ACPI control

acpisurface(4)

Microsoft Surface Book ACPI support

acpithinkpad(4)

IBM/Lenovo ThinkPad ACPI support

acpitimer(4)

ACPI power management timer

acpitoshiba(4)

Toshiba ACPI support

acpitz(4)

ACPI thermal zone

acpivideo(4)

ACPI video

acpivout(4)

ACPI video output

aibs(4)

ASUSTeK AI Booster ACPI ATK0110 temperature, voltage, and fan sensor

amdgpio(4)

AMD GPIO controller

ampchwm(4)

Ampere Altra fine-grained power telemetry

aplgpio(4)

Intel Apollo Lake GPIO controller

asmc(4)

Apple System Management Controller (SMC)

bse(4)

Broadcom GENET 10/100/1Gb Ethernet device

bytgpio(4)

Intel Bay Trail GPIO controller

ccp(4)

AMD cryptographic co-processor

chvgpio(4)

Intel Cherry View GPIO controller

dwgpio(4)

Synopsys DesignWare GPIO controller

dwiic(4)

Synopsys DesignWare I2C controller

glkgpio(4)

Intel Gemini Lake GPIO controller

imxiic(4)

i.MX onboard I2C controller

iosf(4)

Intel OnChip System Fabric device

ipmi(4)

Intelligent Platform Management Interface driver

pchgpio(4)

Intel PCH GPIO controller

pluart(4)

ARM PrimeCell PL011 UART

qcgpio(4)

Qualcomm Snapdragon GPIO controller

qciic(4)

Qualcomm Snapdragon GENI I2C controller

sdhc(4)

SD Host Controller

tpm(4)

Trusted Platform Module device

ufshci(4)

Universal Flash Storage Host Controller Interface

FILES #

/dev/apm

Power management data device. May only be opened read-only. May be opened by multiple concurrent users.

/dev/apmctl

Power management control device. May be opened read-write or write-only. May only be opened by one user at a time. An attempt to open the file when in use will fail, returning EBUSY.

HISTORY #

The acpi driver first appeared in OpenBSD 3.8.

AUTHORS #

The acpi driver was written by Thorsten Lockert <tholo@sigmasoft.com> and Jordan Hargrave <jordan@openbsd.org>.

OpenBSD 7.5 - December 11, 2023