6 bool "ACPI (Advanced Configuration and Power Interface) Support"
9 depends on !IA64_HP_SIM
10 depends on IA64 || X86
16 Advanced Configuration and Power Interface (ACPI) support for
17 Linux requires an ACPI compliant platform (hardware/firmware),
18 and assumes the presence of OS-directed configuration and power
19 management (OSPM) software. This option will enlarge your
22 Linux ACPI provides a robust functional replacement for several
23 legacy configuration and power management interfaces, including
24 the Plug-and-Play BIOS specification (PnP BIOS), the
25 MultiProcessor Specification (MPS), and the Advanced Power
26 Management (APM) specification. If both ACPI and APM support
27 are configured, whichever is loaded first shall be used.
29 The ACPI SourceForge project contains the latest source code,
30 documentation, tools, mailing list subscription, and other
31 information. This project is available at:
32 <http://sourceforge.net/projects/acpi>
34 Linux support for ACPI is based on Intel Corporation's ACPI
35 Component Architecture (ACPI CA). For more information see:
36 <http://developer.intel.com/technology/iapc/acpi>
38 ACPI is an open industry specification co-developed by Compaq,
39 Intel, Microsoft, Phoenix, and Toshiba. The specification is
41 <http://www.acpi.info>
51 bool "Deprecated /proc/acpi files"
54 For backwards compatibility, this option allows
55 deprecated /proc/acpi/ files to exist, even when
56 they have been replaced by functions in /sys.
57 The deprecated files (and their replacements) include:
59 /proc/acpi/sleep (/sys/power/state)
60 /proc/acpi/info (/sys/modules/acpi/parameters/acpica_version)
61 /proc/acpi/dsdt (/sys/firmware/acpi/tables/DSDT)
62 /proc/acpi/fadt (/sys/firmware/acpi/tables/FACP)
63 /proc/acpi/debug_layer (/sys/module/acpi/parameters/debug_layer)
64 /proc/acpi/debug_level (/sys/module/acpi/parameters/debug_level)
66 This option has no effect on /proc/acpi/ files
67 and functions which do not yet exist in /sys.
69 Say N to delete /proc/acpi/ files that have moved to /sys/
70 config ACPI_PROCFS_POWER
71 bool "Deprecated power /proc/acpi directories"
75 For backwards compatibility, this option allows
76 deprecated power /proc/acpi/ directories to exist, even when
77 they have been replaced by functions in /sys.
78 The deprecated directories (and their replacements) include:
79 /proc/acpi/battery/* (/sys/class/power_supply/*)
80 /proc/acpi/ac_adapter/* (sys/class/power_supply/*)
81 This option has no effect on /proc/acpi/ directories
82 and functions, which do not yet exist in /sys
84 Say N to delete power /proc/acpi/ directories that have moved to /sys/
86 config ACPI_SYSFS_POWER
87 bool "Future power /sys interface"
91 Say N to disable power /sys interface
93 config ACPI_PROC_EVENT
94 bool "Deprecated /proc/acpi/event support"
98 A user-space daemon, acpi, typically read /proc/acpi/event
99 and handled all ACPI sub-system generated events.
101 These events are now delivered to user-space via
102 either the input layer, or as netlink events.
104 This build option enables the old code for legacy
105 user-space implementation. After some time, this will
106 be moved under CONFIG_ACPI_PROCFS, and then deleted.
108 Say Y here to retain the old behaviour. Say N if your
109 user-space is newer than kernel 2.6.23 (September 2007).
112 tristate "AC Adapter"
116 This driver adds support for the AC Adapter object, which indicates
117 whether a system is on AC, or not. If you have a system that can
118 switch between A/C and battery, say Y.
125 This driver adds support for battery information through
126 /proc/acpi/battery. If you have a mobile system with a battery,
134 This driver handles events on the power, sleep and lid buttons.
135 A daemon reads /proc/acpi/event and perform user-defined actions
136 such as shutting down the system. This is necessary for
137 software controlled poweroff.
141 depends on X86 && BACKLIGHT_CLASS_DEVICE && VIDEO_OUTPUT_CONTROL
144 This driver implement the ACPI Extensions For Display Adapters
145 for integrated graphics devices on motherboard, as specified in
146 ACPI 2.0 Specification, Appendix B, allowing to perform some basic
147 control like defining the video POST device, retrieving EDID information
148 or to setup a video output, etc.
149 Note that this is an ref. implementation only. It may or may not work
150 for your integrated video device.
156 This driver adds support for ACPI fan devices, allowing user-mode
157 applications to perform basic fan control (on, off, status).
161 depends on EXPERIMENTAL
163 This driver adds support for ACPI controlled docking stations
166 tristate "Removable Drive Bay (EXPERIMENTAL)"
167 depends on EXPERIMENTAL
170 This driver adds support for ACPI controlled removable drive
171 bays such as the IBM ultrabay or the Dell Module Bay.
173 config ACPI_PROCESSOR
177 This driver installs ACPI as the idle handler for Linux, and uses
178 ACPI C2 and C3 processor states to save power, on systems that
179 support it. It is required by several flavors of cpufreq
180 Performance-state drivers.
182 config ACPI_HOTPLUG_CPU
184 depends on ACPI_PROCESSOR && HOTPLUG_CPU
185 select ACPI_CONTAINER
189 tristate "Thermal Zone"
190 depends on ACPI_PROCESSOR
194 This driver adds support for ACPI thermal zones. Most mobile and
195 some desktop systems support ACPI thermal zones. It is HIGHLY
196 recommended that this option be enabled, as your processor(s)
197 may be damaged without it.
202 depends on (X86 || IA64)
203 default y if IA64_GENERIC || IA64_SGI_SN2
206 tristate "WMI (EXPERIMENTAL)"
207 depends on EXPERIMENTAL
209 This driver adds support for the ACPI-WMI mapper device (PNP0C14)
210 found on some systems.
212 NOTE: You will need another driver or userspace application on top of
213 this to actually use anything defined in the ACPI-WMI mapper.
216 tristate "ASUS/Medion Laptop Extras"
218 select BACKLIGHT_CLASS_DEVICE
220 This driver provides support for extra features of ACPI-compatible
221 ASUS laptops. As some of Medion laptops are made by ASUS, it may also
222 support some Medion laptops (such as 9675 for example). It makes all
223 the extra buttons generate standard ACPI events that go through
224 /proc/acpi/events, and (on some models) adds support for changing the
225 display brightness and output, switching the LCD backlight on and off,
226 and most importantly, allows you to blink those fancy LEDs intended
227 for reporting mail and wireless status.
229 Note: display switching code is currently considered EXPERIMENTAL,
230 toying with these values may even lock your machine.
232 All settings are changed via /proc/acpi/asus directory entries. Owner
233 and group for these entries can be set with asus_uid and asus_gid
236 More information and a userspace daemon for handling the extra buttons
237 at <http://sourceforge.net/projects/acpi4asus/>.
239 If you have an ACPI-compatible ASUS laptop, say Y or M here. This
240 driver is still under development, so if your laptop is unsupported or
241 something works not quite as expected, please use the mailing list
242 available on the above page (acpi4asus-user@lists.sourceforge.net).
244 NOTE: This driver is deprecated and will probably be removed soon,
245 use asus-laptop instead.
248 tristate "Toshiba Laptop Extras"
250 select BACKLIGHT_CLASS_DEVICE
252 This driver adds support for access to certain system settings
253 on "legacy free" Toshiba laptops. These laptops can be recognized by
254 their lack of a BIOS setup menu and APM support.
256 On these machines, all system configuration is handled through the
257 ACPI. This driver is required for access to controls not covered
258 by the general ACPI drivers, such as LCD brightness, video output,
261 This driver differs from the non-ACPI Toshiba laptop driver (located
262 under "Processor type and features") in several aspects.
263 Configuration is accessed by reading and writing text files in the
264 /proc tree instead of by program interface to /dev. Furthermore, no
265 power management functions are exposed, as those are handled by the
266 general ACPI drivers.
268 More information about this driver is available at
269 <http://memebeam.org/toys/ToshibaAcpiDriver>.
271 If you have a legacy free Toshiba laptop (such as the Libretto L1
274 config ACPI_CUSTOM_DSDT
275 bool "Include Custom DSDT"
276 depends on !STANDALONE
279 This option is to load a custom ACPI DSDT
280 If you don't know what that is, say N.
282 config ACPI_CUSTOM_DSDT_FILE
283 string "Custom DSDT Table file to include"
284 depends on ACPI_CUSTOM_DSDT
287 Enter the full path name to the file which includes the AmlCode
290 config ACPI_BLACKLIST_YEAR
291 int "Disable ACPI for systems before Jan 1st this year" if X86_32
294 enter a 4-digit year, eg. 2001 to disable ACPI by default
295 on platforms with DMI BIOS date before January 1st that year.
296 "acpi=force" can be used to override this mechanism.
298 Enter 0 to disable this mechanism and allow ACPI to
299 run by default no matter what the year. (default)
302 bool "Debug Statements"
305 The ACPI driver can optionally report errors with a great deal
306 of verbosity. Saying Y enables these statements. This will increase
307 your kernel size by around 50K.
309 config ACPI_DEBUG_FUNC_TRACE
310 bool "Additionally enable ACPI function tracing"
312 depends on ACPI_DEBUG
314 ACPI Debug Statements slow down ACPI processing. Function trace
315 is about half of the penalty and is rarely useful.
321 This driver is required on some systems for the proper operation of
322 the battery and thermal drivers. If you are compiling for a
323 mobile system, say Y.
333 This driver will enable your system to shut down using ACPI, and
334 dump your ACPI DSDT table using /proc/acpi/dsdt.
337 bool "Power Management Timer Support" if EMBEDDED
341 The Power Management Timer is available on all ACPI-capable,
342 in most cases even if ACPI is unusable or blacklisted.
344 This timing source is not affected by power management features
345 like aggressive processor idling, throttling, frequency and/or
346 voltage scaling, unlike the commonly used Time Stamp Counter
349 You should nearly always say Y here because many modern
350 systems require this timer.
352 config ACPI_CONTAINER
353 tristate "ACPI0004,PNP0A05 and PNP0A06 Container Driver (EXPERIMENTAL)"
354 depends on EXPERIMENTAL
355 default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU || ACPI_HOTPLUG_IO)
357 This allows _physical_ insertion and removal of CPUs and memory.
358 This can be useful, for example, on NUMA machines that support
359 ACPI based physical hotplug of nodes, or non-NUMA machines that
360 support physical cpu/memory hot-plug.
362 If one selects "m", this driver can be loaded with
363 "modprobe acpi_container".
365 config ACPI_HOTPLUG_MEMORY
366 tristate "Memory Hotplug"
367 depends on MEMORY_HOTPLUG
370 This driver adds supports for ACPI Memory Hotplug. This driver
371 provides support for fielding notifications on ACPI memory
372 devices (PNP0C80) which represent memory ranges that may be
373 onlined or offlined during runtime.
375 Enabling this driver assumes that your platform hardware
376 and firmware have support for hot-plugging physical memory. If
377 your system does not support physically adding or ripping out
378 memory DIMMs at some platform defined granularity (individually
379 or as a bank) at runtime, then you need not enable this driver.
381 If one selects "m," this driver can be loaded using the following
383 $>modprobe acpi_memhotplug
386 tristate "Smart Battery System"
389 This driver adds support for the Smart Battery System, another
390 type of access to battery information, found on some laptops.