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56 they have been replaced by functions in /sys.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 folders"
75 For backwards compatibility, this option allows
76 deprecated power /proc/acpi/ folders to exist, even when
77 they have been replaced by functions in /sys.
78 The deprecated folders (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/ folders
82 and functions, which do not yet exist in /sys
84 Say N to delete power /proc/acpi/ folders that have moved to /sys/
85 config ACPI_SYSFS_POWER
86 bool "Future power /sys interface"
90 Say N to disable power /sys interface
91 config ACPI_PROC_EVENT
92 bool "Deprecated /proc/acpi/event support"
96 A user-space daemon, acpi, typically read /proc/acpi/event
97 and handled all ACPI sub-system generated events.
99 These events are now delivered to user-space via
100 either the input layer, or as netlink events.
102 This build option enables the old code for legacy
103 user-space implementation. After some time, this will
104 be moved under CONFIG_ACPI_PROCFS, and then deleted.
106 Say Y here to retain the old behaviour. Say N if your
107 user-space is newer than kernel 2.6.23 (September 2007).
110 tristate "AC Adapter"
114 This driver adds support for the AC Adapter object, which indicates
115 whether a system is on AC, or not. If you have a system that can
116 switch between A/C and battery, say Y.
123 This driver adds support for battery information through
124 /proc/acpi/battery. If you have a mobile system with a battery,
132 This driver handles events on the power, sleep and lid buttons.
133 A daemon reads /proc/acpi/event and perform user-defined actions
134 such as shutting down the system. This is necessary for
135 software controlled poweroff.
139 depends on X86 && BACKLIGHT_CLASS_DEVICE && VIDEO_OUTPUT_CONTROL
142 This driver implement the ACPI Extensions For Display Adapters
143 for integrated graphics devices on motherboard, as specified in
144 ACPI 2.0 Specification, Appendix B, allowing to perform some basic
145 control like defining the video POST device, retrieving EDID information
146 or to setup a video output, etc.
147 Note that this is an ref. implementation only. It may or may not work
148 for your integrated video device.
154 This driver adds support for ACPI fan devices, allowing user-mode
155 applications to perform basic fan control (on, off, status).
159 depends on EXPERIMENTAL
161 This driver adds support for ACPI controlled docking stations
164 tristate "Removable Drive Bay (EXPERIMENTAL)"
165 depends on EXPERIMENTAL
168 This driver adds support for ACPI controlled removable drive
169 bays such as the IBM ultrabay or the Dell Module Bay.
171 config ACPI_PROCESSOR
175 This driver installs ACPI as the idle handler for Linux, and uses
176 ACPI C2 and C3 processor states to save power, on systems that
177 support it. It is required by several flavors of cpufreq
178 Performance-state drivers.
180 config ACPI_HOTPLUG_CPU
182 depends on ACPI_PROCESSOR && HOTPLUG_CPU
183 select ACPI_CONTAINER
187 tristate "Thermal Zone"
188 depends on ACPI_PROCESSOR
192 This driver adds support for ACPI thermal zones. Most mobile and
193 some desktop systems support ACPI thermal zones. It is HIGHLY
194 recommended that this option be enabled, as your processor(s)
195 may be damaged without it.
200 depends on (X86 || IA64)
201 default y if IA64_GENERIC || IA64_SGI_SN2
204 tristate "WMI (EXPERIMENTAL)"
205 depends on EXPERIMENTAL
207 This driver adds support for the ACPI-WMI mapper device (PNP0C14)
208 found on some systems.
210 NOTE: You will need another driver or userspace application on top of
211 this to actually use anything defined in the ACPI-WMI mapper.
214 tristate "ASUS/Medion Laptop Extras"
216 select BACKLIGHT_CLASS_DEVICE
218 This driver provides support for extra features of ACPI-compatible
219 ASUS laptops. As some of Medion laptops are made by ASUS, it may also
220 support some Medion laptops (such as 9675 for example). It makes all
221 the extra buttons generate standard ACPI events that go through
222 /proc/acpi/events, and (on some models) adds support for changing the
223 display brightness and output, switching the LCD backlight on and off,
224 and most importantly, allows you to blink those fancy LEDs intended
225 for reporting mail and wireless status.
227 Note: display switching code is currently considered EXPERIMENTAL,
228 toying with these values may even lock your machine.
230 All settings are changed via /proc/acpi/asus directory entries. Owner
231 and group for these entries can be set with asus_uid and asus_gid
234 More information and a userspace daemon for handling the extra buttons
235 at <http://sourceforge.net/projects/acpi4asus/>.
237 If you have an ACPI-compatible ASUS laptop, say Y or M here. This
238 driver is still under development, so if your laptop is unsupported or
239 something works not quite as expected, please use the mailing list
240 available on the above page (acpi4asus-user@lists.sourceforge.net).
242 NOTE: This driver is deprecated and will probably be removed soon,
243 use asus-laptop instead.
246 tristate "Toshiba Laptop Extras"
248 select BACKLIGHT_CLASS_DEVICE
250 This driver adds support for access to certain system settings
251 on "legacy free" Toshiba laptops. These laptops can be recognized by
252 their lack of a BIOS setup menu and APM support.
254 On these machines, all system configuration is handled through the
255 ACPI. This driver is required for access to controls not covered
256 by the general ACPI drivers, such as LCD brightness, video output,
259 This driver differs from the non-ACPI Toshiba laptop driver (located
260 under "Processor type and features") in several aspects.
261 Configuration is accessed by reading and writing text files in the
262 /proc tree instead of by program interface to /dev. Furthermore, no
263 power management functions are exposed, as those are handled by the
264 general ACPI drivers.
266 More information about this driver is available at
267 <http://memebeam.org/toys/ToshibaAcpiDriver>.
269 If you have a legacy free Toshiba laptop (such as the Libretto L1
272 config ACPI_CUSTOM_DSDT
273 bool "Include Custom DSDT"
274 depends on !STANDALONE
277 This option is to load a custom ACPI DSDT
278 If you don't know what that is, say N.
280 config ACPI_CUSTOM_DSDT_FILE
281 string "Custom DSDT Table file to include"
282 depends on ACPI_CUSTOM_DSDT
285 Enter the full path name to the file which includes the AmlCode
288 config ACPI_BLACKLIST_YEAR
289 int "Disable ACPI for systems before Jan 1st this year" if X86_32
292 enter a 4-digit year, eg. 2001 to disable ACPI by default
293 on platforms with DMI BIOS date before January 1st that year.
294 "acpi=force" can be used to override this mechanism.
296 Enter 0 to disable this mechanism and allow ACPI to
297 run by default no matter what the year. (default)
300 bool "Debug Statements"
303 The ACPI driver can optionally report errors with a great deal
304 of verbosity. Saying Y enables these statements. This will increase
305 your kernel size by around 50K.
307 config ACPI_DEBUG_FUNC_TRACE
308 bool "Additionally enable ACPI function tracing"
310 depends on ACPI_DEBUG
312 ACPI Debug Statements slow down ACPI processing. Function trace
313 is about half of the penalty and is rarely useful.
319 This driver is required on some systems for the proper operation of
320 the battery and thermal drivers. If you are compiling for a
321 mobile system, say Y.
331 This driver will enable your system to shut down using ACPI, and
332 dump your ACPI DSDT table using /proc/acpi/dsdt.
335 bool "Power Management Timer Support" if EMBEDDED
339 The Power Management Timer is available on all ACPI-capable,
340 in most cases even if ACPI is unusable or blacklisted.
342 This timing source is not affected by power management features
343 like aggressive processor idling, throttling, frequency and/or
344 voltage scaling, unlike the commonly used Time Stamp Counter
347 You should nearly always say Y here because many modern
348 systems require this timer.
350 config ACPI_CONTAINER
351 tristate "ACPI0004,PNP0A05 and PNP0A06 Container Driver (EXPERIMENTAL)"
352 depends on EXPERIMENTAL
353 default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU || ACPI_HOTPLUG_IO)
355 This allows _physical_ insertion and removal of CPUs and memory.
356 This can be useful, for example, on NUMA machines that support
357 ACPI based physical hotplug of nodes, or non-NUMA machines that
358 support physical cpu/memory hot-plug.
360 If one selects "m", this driver can be loaded with
361 "modprobe acpi_container".
363 config ACPI_HOTPLUG_MEMORY
364 tristate "Memory Hotplug"
365 depends on MEMORY_HOTPLUG
368 This driver adds supports for ACPI Memory Hotplug. This driver
369 provides support for fielding notifications on ACPI memory
370 devices (PNP0C80) which represent memory ranges that may be
371 onlined or offlined during runtime.
373 Enabling this driver assumes that your platform hardware
374 and firmware have support for hot-plugging physical memory. If
375 your system does not support physically adding or ripping out
376 memory DIMMs at some platform defined granularity (individually
377 or as a bank) at runtime, then you need not enable this driver.
379 If one selects "m," this driver can be loaded using the following
381 $>modprobe acpi_memhotplug
384 tristate "Smart Battery System"
387 This driver adds support for the Smart Battery System, another
388 type of access to battery information, found on some laptops.