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56 they have been replaced by functions in /sys.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77 they have been replaced by functions in /sys.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
145 This driver implement the ACPI Extensions For Display Adapters
146 for integrated graphics devices on motherboard, as specified in
147 ACPI 2.0 Specification, Appendix B, allowing to perform some basic
148 control like defining the video POST device, retrieving EDID information
149 or to setup a video output, etc.
150 Note that this is an ref. implementation only. It may or may not work
151 for your integrated video device.
158 This driver adds support for ACPI fan devices, allowing user-mode
159 applications to perform basic fan control (on, off, status).
163 depends on EXPERIMENTAL
165 This driver adds support for ACPI controlled docking stations
168 tristate "Removable Drive Bay (EXPERIMENTAL)"
169 depends on EXPERIMENTAL
172 This driver adds support for ACPI controlled removable drive
173 bays such as the IBM ultrabay or the Dell Module Bay.
175 config ACPI_PROCESSOR
180 This driver installs ACPI as the idle handler for Linux, and uses
181 ACPI C2 and C3 processor states to save power, on systems that
182 support it. It is required by several flavors of cpufreq
183 Performance-state drivers.
185 config ACPI_HOTPLUG_CPU
187 depends on ACPI_PROCESSOR && HOTPLUG_CPU
188 select ACPI_CONTAINER
192 tristate "Thermal Zone"
193 depends on ACPI_PROCESSOR
197 This driver adds support for ACPI thermal zones. Most mobile and
198 some desktop systems support ACPI thermal zones. It is HIGHLY
199 recommended that this option be enabled, as your processor(s)
200 may be damaged without it.
205 depends on (X86 || IA64)
206 default y if IA64_GENERIC || IA64_SGI_SN2
209 tristate "WMI (EXPERIMENTAL)"
211 depends on EXPERIMENTAL
213 This driver adds support for the ACPI-WMI (Windows Management
214 Instrumentation) mapper device (PNP0C14) found on some systems.
216 ACPI-WMI is a proprietary extension to ACPI to expose parts of the
217 ACPI firmware to userspace - this is done through various vendor
218 defined methods and data blocks in a PNP0C14 device, which are then
219 made available for userspace to call.
221 The implementation of this in Linux currently only exposes this to
222 other kernel space drivers.
224 This driver is a required dependency to build the firmware specific
225 drivers needed on many machines, including Acer and HP laptops.
227 It is safe to enable this driver even if your DSDT doesn't define
228 any ACPI-WMI devices.
231 tristate "ASUS/Medion Laptop Extras"
233 select BACKLIGHT_CLASS_DEVICE
235 This driver provides support for extra features of ACPI-compatible
236 ASUS laptops. As some of Medion laptops are made by ASUS, it may also
237 support some Medion laptops (such as 9675 for example). It makes all
238 the extra buttons generate standard ACPI events that go through
239 /proc/acpi/events, and (on some models) adds support for changing the
240 display brightness and output, switching the LCD backlight on and off,
241 and most importantly, allows you to blink those fancy LEDs intended
242 for reporting mail and wireless status.
244 Note: display switching code is currently considered EXPERIMENTAL,
245 toying with these values may even lock your machine.
247 All settings are changed via /proc/acpi/asus directory entries. Owner
248 and group for these entries can be set with asus_uid and asus_gid
251 More information and a userspace daemon for handling the extra buttons
252 at <http://sourceforge.net/projects/acpi4asus/>.
254 If you have an ACPI-compatible ASUS laptop, say Y or M here. This
255 driver is still under development, so if your laptop is unsupported or
256 something works not quite as expected, please use the mailing list
257 available on the above page (acpi4asus-user@lists.sourceforge.net).
259 NOTE: This driver is deprecated and will probably be removed soon,
260 use asus-laptop instead.
263 tristate "Toshiba Laptop Extras"
265 select BACKLIGHT_CLASS_DEVICE
267 This driver adds support for access to certain system settings
268 on "legacy free" Toshiba laptops. These laptops can be recognized by
269 their lack of a BIOS setup menu and APM support.
271 On these machines, all system configuration is handled through the
272 ACPI. This driver is required for access to controls not covered
273 by the general ACPI drivers, such as LCD brightness, video output,
276 This driver differs from the non-ACPI Toshiba laptop driver (located
277 under "Processor type and features") in several aspects.
278 Configuration is accessed by reading and writing text files in the
279 /proc tree instead of by program interface to /dev. Furthermore, no
280 power management functions are exposed, as those are handled by the
281 general ACPI drivers.
283 More information about this driver is available at
284 <http://memebeam.org/toys/ToshibaAcpiDriver>.
286 If you have a legacy free Toshiba laptop (such as the Libretto L1
289 config ACPI_CUSTOM_DSDT_FILE
290 string "Custom DSDT Table file to include"
292 depends on !STANDALONE
294 This option supports a custom DSDT by linking it into the kernel.
295 See Documentation/acpi/dsdt-override.txt
297 Enter the full path name to the file which includes the AmlCode
300 If unsure, don't enter a file name.
302 config ACPI_CUSTOM_DSDT
304 default ACPI_CUSTOM_DSDT_FILE != ""
306 config ACPI_BLACKLIST_YEAR
307 int "Disable ACPI for systems before Jan 1st this year" if X86_32
310 enter a 4-digit year, eg. 2001 to disable ACPI by default
311 on platforms with DMI BIOS date before January 1st that year.
312 "acpi=force" can be used to override this mechanism.
314 Enter 0 to disable this mechanism and allow ACPI to
315 run by default no matter what the year. (default)
318 bool "Debug Statements"
321 The ACPI driver can optionally report errors with a great deal
322 of verbosity. Saying Y enables these statements. This will increase
323 your kernel size by around 50K.
325 config ACPI_DEBUG_FUNC_TRACE
326 bool "Additionally enable ACPI function tracing"
328 depends on ACPI_DEBUG
330 ACPI Debug Statements slow down ACPI processing. Function trace
331 is about half of the penalty and is rarely useful.
337 This driver is required on some systems for the proper operation of
338 the battery and thermal drivers. If you are compiling for a
339 mobile system, say Y.
349 This driver will enable your system to shut down using ACPI, and
350 dump your ACPI DSDT table using /proc/acpi/dsdt.
353 bool "Power Management Timer Support" if EMBEDDED
357 The Power Management Timer is available on all ACPI-capable,
358 in most cases even if ACPI is unusable or blacklisted.
360 This timing source is not affected by power management features
361 like aggressive processor idling, throttling, frequency and/or
362 voltage scaling, unlike the commonly used Time Stamp Counter
365 You should nearly always say Y here because many modern
366 systems require this timer.
368 config ACPI_CONTAINER
369 tristate "ACPI0004,PNP0A05 and PNP0A06 Container Driver (EXPERIMENTAL)"
370 depends on EXPERIMENTAL
371 default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU || ACPI_HOTPLUG_IO)
373 This allows _physical_ insertion and removal of CPUs and memory.
374 This can be useful, for example, on NUMA machines that support
375 ACPI based physical hotplug of nodes, or non-NUMA machines that
376 support physical cpu/memory hot-plug.
378 If one selects "m", this driver can be loaded with
379 "modprobe acpi_container".
381 config ACPI_HOTPLUG_MEMORY
382 tristate "Memory Hotplug"
383 depends on MEMORY_HOTPLUG
386 This driver adds supports for ACPI Memory Hotplug. This driver
387 provides support for fielding notifications on ACPI memory
388 devices (PNP0C80) which represent memory ranges that may be
389 onlined or offlined during runtime.
391 Enabling this driver assumes that your platform hardware
392 and firmware have support for hot-plugging physical memory. If
393 your system does not support physically adding or ripping out
394 memory DIMMs at some platform defined granularity (individually
395 or as a bank) at runtime, then you need not enable this driver.
397 If one selects "m," this driver can be loaded using the following
399 $>modprobe acpi_memhotplug
402 tristate "Smart Battery System"
405 This driver adds support for the Smart Battery System, another
406 type of access to battery information, found on some laptops.