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# ACPI Configuration

#

menuconfig ACPI

        bool "ACPI (Advanced Configuration and Power Interface) Support"

        depends on !X86_NUMAQ

        depends on !X86_VISWS

        depends on !IA64_HP_SIM

        depends on IA64 || X86

        depends on PCI

        depends on PM

        select PNP

        default y

        ---help---

          Advanced Configuration and Power Interface (ACPI) support for

          Linux requires an ACPI compliant platform (hardware/firmware),

          and assumes the presence of OS-directed configuration and power

          management (OSPM) software.  This option will enlarge your

          kernel by about 70K.

          Linux ACPI provides a robust functional replacement for several

          legacy configuration and power management interfaces, including

          the Plug-and-Play BIOS specification (PnP BIOS), the

          MultiProcessor Specification (MPS), and the Advanced Power

          Management (APM) specification.  If both ACPI and APM support

          are configured, whichever is loaded first shall be used.

          The ACPI SourceForge project contains the latest source code,

          documentation, tools, mailing list subscription, and other

          information.  This project is available at:

          Linux support for ACPI is based on Intel Corporation's ACPI

          Component Architecture (ACPI CA).  For more information see:

          ACPI is an open industry specification co-developed by Compaq,

          Intel, Microsoft, Phoenix, and Toshiba.  The specification is

          available at:

if ACPI

config ACPI_SLEEP

        bool

        depends on PM_SLEEP

        default y

config ACPI_PROCFS

        bool "Deprecated /proc/acpi files"

        depends on PROC_FS

        ---help---

          For backwards compatibility, this option allows

          deprecated /proc/acpi/ files to exist, even when

          they have been replaced by functions in /sys.

          The deprecated files (and their replacements) include:

          /proc/acpi/sleep (/sys/power/state)

          /proc/acpi/info (/sys/modules/acpi/parameters/acpica_version)

          /proc/acpi/dsdt (/sys/firmware/acpi/tables/DSDT)

          /proc/acpi/fadt (/sys/firmware/acpi/tables/FACP)

          /proc/acpi/debug_layer (/sys/module/acpi/parameters/debug_layer)

          /proc/acpi/debug_level (/sys/module/acpi/parameters/debug_level)

          This option has no effect on /proc/acpi/ files

          and functions which do not yet exist in /sys.

          Say N to delete /proc/acpi/ files that have moved to /sys/

config ACPI_PROCFS_POWER

        bool "Deprecated power /proc/acpi folders"

        depends on PROC_FS

        default y

        ---help---

          For backwards compatibility, this option allows

          deprecated power /proc/acpi/ folders to exist, even when

          they have been replaced by functions in /sys.

          The deprecated folders (and their replacements) include:

          /proc/acpi/battery/* (/sys/class/power_supply/*)

          /proc/acpi/ac_adapter/* (sys/class/power_supply/*)

          This option has no effect on /proc/acpi/ folders

          and functions, which do not yet exist in /sys

          Say N to delete power /proc/acpi/ folders that have moved to /sys/

config ACPI_SYSFS_POWER

        bool "Future power /sys interface"

        select POWER_SUPPLY

        default y

        ---help---

          Say N to disable power /sys interface

config ACPI_PROC_EVENT

        bool "Deprecated /proc/acpi/event support"

        depends on PROC_FS

        default y

        ---help---

          A user-space daemon, acpi, typically read /proc/acpi/event

          and handled all ACPI sub-system generated events.

          These events are now delivered to user-space via

          either the input layer, or as netlink events.

          This build option enables the old code for legacy

          user-space implementation.  After some time, this will

          be moved under CONFIG_ACPI_PROCFS, and then deleted.

          Say Y here to retain the old behaviour.  Say N if your

          user-space is newer than kernel 2.6.23 (September 2007).

config ACPI_AC

        tristate "AC Adapter"

        depends on X86

        default y

        help

          This driver adds support for the AC Adapter object, which indicates

          whether a system is on AC, or not. If you have a system that can

          switch between A/C and battery, say Y.

config ACPI_BATTERY

        tristate "Battery"

        depends on X86

        default y

        help

          This driver adds support for battery information through

          /proc/acpi/battery. If you have a mobile system with a battery,

          say Y.

config ACPI_BUTTON

        tristate "Button"

        depends on INPUT

        default y

        help

          This driver handles events on the power, sleep and lid buttons.

          A daemon reads /proc/acpi/event and perform user-defined actions

          such as shutting down the system.  This is necessary for

          software controlled poweroff.

config ACPI_VIDEO

        tristate "Video"

        depends on X86 && BACKLIGHT_CLASS_DEVICE && VIDEO_OUTPUT_CONTROL

        depends on INPUT

        help

          This driver implement the ACPI Extensions For Display Adapters

          for integrated graphics devices on motherboard, as specified in

          ACPI 2.0 Specification, Appendix B, allowing to perform some basic

          control like defining the video POST device, retrieving EDID information

          or to setup a video output, etc.

          Note that this is an ref. implementation only.  It may or may not work

          for your integrated video device.

config ACPI_FAN

        tristate "Fan"

        default y

        help

          This driver adds support for ACPI fan devices, allowing user-mode

          applications to perform basic fan control (on, off, status).

config ACPI_DOCK

        tristate "Dock"

        depends on EXPERIMENTAL

        help

          This driver adds support for ACPI controlled docking stations

config ACPI_BAY

        tristate "Removable Drive Bay (EXPERIMENTAL)"

        depends on EXPERIMENTAL

        depends on ACPI_DOCK

        help

          This driver adds support for ACPI controlled removable drive

          bays such as the IBM ultrabay or the Dell Module Bay.

config ACPI_PROCESSOR

        tristate "Processor"

        default y

        help

          This driver installs ACPI as the idle handler for Linux, and uses

          ACPI C2 and C3 processor states to save power, on systems that

          support it.  It is required by several flavors of cpufreq

          Performance-state drivers.

config ACPI_HOTPLUG_CPU

        bool

        depends on ACPI_PROCESSOR && HOTPLUG_CPU

        select ACPI_CONTAINER

        default y

config ACPI_THERMAL

        tristate "Thermal Zone"

        depends on ACPI_PROCESSOR

        default y

        help

          This driver adds support for ACPI thermal zones.  Most mobile and

          some desktop systems support ACPI thermal zones.  It is HIGHLY

          recommended that this option be enabled, as your processor(s)

          may be damaged without it.

config ACPI_NUMA

        bool "NUMA support"

        depends on NUMA

        depends on (X86 || IA64)

        default y if IA64_GENERIC || IA64_SGI_SN2

config ACPI_ASUS

        tristate "ASUS/Medion Laptop Extras"

        depends on X86

        select BACKLIGHT_CLASS_DEVICE

        ---help---

          This driver provides support for extra features of ACPI-compatible

          ASUS laptops. As some of Medion laptops are made by ASUS, it may also

          support some Medion laptops (such as 9675 for example).  It makes all

          the extra buttons generate standard ACPI events that go through

          /proc/acpi/events, and (on some models) adds support for changing the

          display brightness and output, switching the LCD backlight on and off,

          and most importantly, allows you to blink those fancy LEDs intended

          for reporting mail and wireless status.

          Note: display switching code is currently considered EXPERIMENTAL,

          toying with these values may even lock your machine.

          All settings are changed via /proc/acpi/asus directory entries. Owner

          and group for these entries can be set with asus_uid and asus_gid

          parameters.

          More information and a userspace daemon for handling the extra buttons

          at .

          If you have an ACPI-compatible ASUS laptop, say Y or M here. This

          driver is still under development, so if your laptop is unsupported or

          something works not quite as expected, please use the mailing list

          available on the above page (acpi4asus-user@lists.sourceforge.net).

          NOTE: This driver is deprecated and will probably be removed soon,

          use asus-laptop instead.

config ACPI_TOSHIBA

        tristate "Toshiba Laptop Extras"

        depends on X86

        select BACKLIGHT_CLASS_DEVICE

        ---help---

          This driver adds support for access to certain system settings

          on "legacy free" Toshiba laptops.  These laptops can be recognized by

          their lack of a BIOS setup menu and APM support.

          On these machines, all system configuration is handled through the

          ACPI.  This driver is required for access to controls not covered

          by the general ACPI drivers, such as LCD brightness, video output,

          etc.

          This driver differs from the non-ACPI Toshiba laptop driver (located

          under "Processor type and features") in several aspects.

          Configuration is accessed by reading and writing text files in the

          /proc tree instead of by program interface to /dev.  Furthermore, no

          power management functions are exposed, as those are handled by the

          general ACPI drivers.

          More information about this driver is available at

          .

          If you have a legacy free Toshiba laptop (such as the Libretto L1

          series), say Y.

config ACPI_CUSTOM_DSDT

        bool "Include Custom DSDT"

        depends on !STANDALONE

        default n

        help

          This option is to load a custom ACPI DSDT

          If you don't know what that is, say N.

config ACPI_CUSTOM_DSDT_FILE

        string "Custom DSDT Table file to include"

        depends on ACPI_CUSTOM_DSDT

        default ""

        help

          Enter the full path name to the file which includes the AmlCode

          declaration.

config ACPI_BLACKLIST_YEAR

        int "Disable ACPI for systems before Jan 1st this year" if X86_32

        default 0

        help

          enter a 4-digit year, eg. 2001 to disable ACPI by default

          on platforms with DMI BIOS date before January 1st that year.

          "acpi=force" can be used to override this mechanism.

          Enter 0 to disable this mechanism and allow ACPI to

          run by default no matter what the year.  (default)

config ACPI_DEBUG

        bool "Debug Statements"

        default n

        help

          The ACPI driver can optionally report errors with a great deal

          of verbosity. Saying Y enables these statements. This will increase

          your kernel size by around 50K.

config ACPI_DEBUG_FUNC_TRACE

        bool "Additionally enable ACPI function tracing"

        default n

        depends on ACPI_DEBUG

        help

          ACPI Debug Statements slow down ACPI processing. Function trace

          is about half of the penalty and is rarely useful.

config ACPI_EC

        bool

        default y

        help

          This driver is required on some systems for the proper operation of

          the battery and thermal drivers.  If you are compiling for a

          mobile system, say Y.

config ACPI_POWER

        bool

        default y

config ACPI_SYSTEM

        bool

        default y

        help

          This driver will enable your system to shut down using ACPI, and

          dump your ACPI DSDT table using /proc/acpi/dsdt.

config X86_PM_TIMER

        bool "Power Management Timer Support" if EMBEDDED

        depends on X86

        default y

        help

          The Power Management Timer is available on all ACPI-capable,

          in most cases even if ACPI is unusable or blacklisted.

          This timing source is not affected by power management features

          like aggressive processor idling, throttling, frequency and/or

          voltage scaling, unlike the commonly used Time Stamp Counter

          (TSC) timing source.

          You should nearly always say Y here because many modern

          systems require this timer.

config ACPI_CONTAINER

        tristate "ACPI0004,PNP0A05 and PNP0A06 Container Driver (EXPERIMENTAL)"

        depends on EXPERIMENTAL

        default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU || ACPI_HOTPLUG_IO)

         ---help---

          This allows _physical_ insertion and removal of CPUs and memory.

          This can be useful, for example, on NUMA machines that support

          ACPI based physical hotplug of nodes, or non-NUMA machines that

          support physical cpu/memory hot-plug.

          If one selects "m", this driver can be loaded with

          "modprobe acpi_container".

config ACPI_HOTPLUG_MEMORY

        tristate "Memory Hotplug"

        depends on MEMORY_HOTPLUG

        default n

        help

          This driver adds supports for ACPI Memory Hotplug.  This driver

          provides support for fielding notifications on ACPI memory

          devices (PNP0C80) which represent memory ranges that may be

          onlined or offlined during runtime.

          Enabling this driver assumes that your platform hardware

          and firmware have support for hot-plugging physical memory. If

          your system does not support physically adding or ripping out

          memory DIMMs at some platform defined granularity (individually

          or as a bank) at runtime, then you need not enable this driver.

          If one selects "m," this driver can be loaded using the following

          command:

                $>modprobe acpi_memhotplug

config ACPI_SBS

        tristate "Smart Battery System"

        depends on X86

        help

          This driver adds support for the Smart Battery System, another

          type of access to battery information, found on some laptops.

endif   # ACPI