xref: /drivers/acpi/Kconfig

#
# ACPI Configuration
#

menuconfig ACPI
	bool "ACPI (Advanced Configuration and Power Interface) Support"
	depends on !IA64_HP_SIM
	depends on IA64 || X86
	depends on PCI
	depends on PM
	select PNP
	select CPU_IDLE
	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:
	  <http://sourceforge.net/projects/acpi>

	  Linux support for ACPI is based on Intel Corporation's ACPI
	  Component Architecture (ACPI CA).  For more information see:
	  <http://developer.intel.com/technology/iapc/acpi>

	  ACPI is an open industry specification co-developed by Compaq,
	  Intel, Microsoft, Phoenix, and Toshiba.  The specification is
	  available at:
	  <http://www.acpi.info>

if ACPI

config ACPI_SLEEP
	bool
	depends on SUSPEND || HIBERNATION
	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	  they have been replaced by functions in /sys.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 directories"
	depends on PROC_FS
	default y
	---help---
	  For backwards compatibility, this option allows
          deprecated power /proc/acpi/ directories to exist, even when
          they have been replaced by functions in /sys.
          The deprecated directories (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/ directories
	  and functions, which do not yet exist in /sys

	  Say N to delete power /proc/acpi/ directories 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
	select THERMAL
	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"
	select THERMAL
	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
	bool "Dock"
	depends on EXPERIMENTAL
	help
	  This driver adds support for ACPI controlled docking stations and removable
	  drive bays such as the IBM ultrabay or the Dell Module Bay.

config ACPI_PROCESSOR
	tristate "Processor"
	select THERMAL
	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
	select THERMAL
	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_CUSTOM_DSDT_FILE
	string "Custom DSDT Table file to include"
	default ""
	depends on !STANDALONE
	help
	  This option supports a custom DSDT by linking it into the kernel.
	  See Documentation/acpi/dsdt-override.txt

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

	  If unsure, don't enter a file name.

config ACPI_CUSTOM_DSDT
	bool
	default ACPI_CUSTOM_DSDT_FILE != ""

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 subsystem can produce debug output.  Saying Y enables this
	  output and increases the kernel size by around 50K.

	  Use the acpi.debug_layer and acpi.debug_level kernel command-line
	  parameters documented in Documentation/acpi/debug.txt and
	  Documentation/kernel-parameters.txt to control the type and
	  amount of debug output.

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_PCI_SLOT
	tristate "PCI slot detection driver"
	default n
	help
	  This driver will attempt to discover all PCI slots in your system,
	  and creates entries in /sys/bus/pci/slots/. This feature can
	  help you correlate PCI bus addresses with the physical geography
	  of your slots. If you are unsure, say N.

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 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