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# ACPI Configuration
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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they have been replaced by functions in /sys.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
