1.\" $OpenBSD: acpi.4,v 1.69 2022/09/13 05:49:23 jmc Exp $ 2.\" 3.\" Copyright (c) 2006 Alexander Yurchenko <grange@openbsd.org> 4.\" 5.\" Permission to use, copy, modify, and distribute this software for any 6.\" purpose with or without fee is hereby granted, provided that the above 7.\" copyright notice and this permission notice appear in all copies. 8.\" 9.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16.\" 17.Dd $Mdocdate: September 13 2022 $ 18.Dt ACPI 4 19.Os 20.Sh NAME 21.Nm acpi 22.Nd Advanced Configuration and Power Interface 23.Sh SYNOPSIS 24.Cd "acpi0 at bios?" 25.Sh DESCRIPTION 26The 27.Nm 28driver provides basic support for ACPI including loading ACPI tables from 29the firmware, parsing and interpreting AML code, event handling, 30suspending and powering off, and attaching device drivers. 31Userland may access 32.Nm 33by using the 34.Xr apm 4 35device. 36.Pp 37The following devices can attach to 38.Nm : 39.Pp 40.Bl -tag -width "acpithinkpad(4)XXX" -offset indent -compact 41.It Xr abl 4 42Apple backlight support 43.It Xr acpiac 4 44ACPI AC adapter 45.It Xr acpials 4 46ACPI ambient light sensor 47.It Xr acpiasus 4 48ASUS ACPI hotkeys 49.It Xr acpibat 4 50ACPI control method battery 51.It Xr acpibtn 4 52ACPI button 53.It Xr acpicbkbd 4 54Chromebook keyboard backlight 55.It Xr acpicpu 4 56ACPI processor power and performance state 57.It Xr acpidock 4 58ACPI docking station 59.It Xr acpiec 4 60ACPI embedded controller 61.It Xr acpige 4 62ACPI generic event device 63.It Xr acpihid 4 64ACPI HID event and 5-button array 65.It Xr acpihpet 4 66ACPI high precision event timer 67.It Xr acpihve 4 68Hyper-V entropy 69.It Xr acpimadt 4 70ACPI APIC configuration 71.It Xr acpimcfg 4 72ACPI PCI Express configuration space 73.It Xr acpipci 4 74ACPI PCI host bridge 75.It Xr acpiprt 4 76ACPI PCI routing table configuration 77.It Xr acpipwrres 4 78ACPI power resources 79.It Xr acpisbs 4 80ACPI Smart Battery subsystem 81.It Xr acpisony 4 82Sony ACPI control 83.It Xr acpisurface 4 84Microsoft Surface Book ACPI support 85.It Xr acpithinkpad 4 86IBM/Lenovo ThinkPad ACPI support 87.It Xr acpitimer 4 88ACPI power management timer 89.It Xr acpitoshiba 4 90Toshiba ACPI support 91.It Xr acpitz 4 92ACPI thermal zone 93.It Xr acpivideo 4 94ACPI video 95.It Xr acpivout 4 96ACPI video output 97.It Xr aibs 4 98ASUSTeK AI Booster ACPI ATK0110 temperature, voltage, and fan sensor 99.It Xr amdgpio 4 100AMD GPIO controller 101.It Xr aplgpio 4 102Intel Apollo Lake GPIO controller 103.It Xr bse 4 104Broadcom GENET 10/100/1Gb Ethernet device 105.It Xr bytgpio 4 106Intel Bay Trail GPIO controller 107.It Xr ccp 4 108AMD cryptographic co-processor 109.It Xr chvgpio 4 110Intel Cherry View GPIO controller 111.It Xr dwgpio 4 112Synopsys DesignWare GPIO controller 113.It Xr dwiic 4 114Synopsys DesignWare I2C controller 115.It Xr glkgpio 4 116Intel Gemini Lake GPIO controller 117.It Xr imxiic 4 118i.MX onboard I2C controller 119.It Xr pchgpio 4 120Intel PCH GPIO controller 121.It Xr qcgpio 4 122Qualcomm Snapdragon GPIO controller 123.It Xr qciic 4 124Qualcomm Snapdragon GENI I2C controller 125.It Xr tpm 4 126Trusted Platform Module device 127.El 128.Sh FILES 129.Bl -tag -width "/dev/apmctlXXX" 130.It /dev/apm 131Power management data device. 132May only be opened read-only. 133May be opened by multiple concurrent users. 134.It /dev/apmctl 135Power management control device. 136May be opened read-write or write-only. 137May only be opened by one user at a time. 138An attempt to open the file when in use will fail, returning 139.Er EBUSY . 140.El 141.Sh SEE ALSO 142.Xr apm 4 , 143.Xr intro 4 144.Sh HISTORY 145The 146.Nm 147driver first appeared in 148.Ox 3.8 . 149.Sh AUTHORS 150.An -nosplit 151The 152.Nm 153driver was written by 154.An Thorsten Lockert Aq Mt tholo@sigmasoft.com 155and 156.An Jordan Hargrave Aq Mt jordan@openbsd.org . 157