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
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
aplgpio(4): Intel Apollo Lake GPIO controller
bse(4): Broadcom GENET 10/100/Gigabit Ethernet device
bytgpio(4): Intel Bay Trail GPIO controller
ccp(4): AMD cryptographic co-processor
chvgpio(4): Intel Cherry View GPIO controller
dwiic(4): Synopsys DesignWare I2C controller
glkgpio(4): Intel Gemini Lake GPIO controller
tpm(4): Trusted Platform Module device

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>.

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