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56 they have been replaced by functions in /sys.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77 they have been replaced by functions in /sys.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 "ASUS/Medion Laptop Extras"
206 select BACKLIGHT_CLASS_DEVICE
208 This driver provides support for extra features of ACPI-compatible
209 ASUS laptops. As some of Medion laptops are made by ASUS, it may also
210 support some Medion laptops (such as 9675 for example). It makes all
211 the extra buttons generate standard ACPI events that go through
212 /proc/acpi/events, and (on some models) adds support for changing the
213 display brightness and output, switching the LCD backlight on and off,
214 and most importantly, allows you to blink those fancy LEDs intended
215 for reporting mail and wireless status.
217 Note: display switching code is currently considered EXPERIMENTAL,
218 toying with these values may even lock your machine.
220 All settings are changed via /proc/acpi/asus directory entries. Owner
221 and group for these entries can be set with asus_uid and asus_gid
224 More information and a userspace daemon for handling the extra buttons
225 at <http://sourceforge.net/projects/acpi4asus/>.
227 If you have an ACPI-compatible ASUS laptop, say Y or M here. This
228 driver is still under development, so if your laptop is unsupported or
229 something works not quite as expected, please use the mailing list
230 available on the above page (acpi4asus-user@lists.sourceforge.net).
232 NOTE: This driver is deprecated and will probably be removed soon,
233 use asus-laptop instead.
236 tristate "Toshiba Laptop Extras"
238 select BACKLIGHT_CLASS_DEVICE
240 This driver adds support for access to certain system settings
241 on "legacy free" Toshiba laptops. These laptops can be recognized by
242 their lack of a BIOS setup menu and APM support.
244 On these machines, all system configuration is handled through the
245 ACPI. This driver is required for access to controls not covered
246 by the general ACPI drivers, such as LCD brightness, video output,
249 This driver differs from the non-ACPI Toshiba laptop driver (located
250 under "Processor type and features") in several aspects.
251 Configuration is accessed by reading and writing text files in the
252 /proc tree instead of by program interface to /dev. Furthermore, no
253 power management functions are exposed, as those are handled by the
254 general ACPI drivers.
256 More information about this driver is available at
257 <http://memebeam.org/toys/ToshibaAcpiDriver>.
259 If you have a legacy free Toshiba laptop (such as the Libretto L1
262 config ACPI_CUSTOM_DSDT
263 bool "Include Custom DSDT"
264 depends on !STANDALONE
267 This option is to load a custom ACPI DSDT
268 If you don't know what that is, say N.
270 config ACPI_CUSTOM_DSDT_FILE
271 string "Custom DSDT Table file to include"
272 depends on ACPI_CUSTOM_DSDT
275 Enter the full path name to the file which includes the AmlCode
278 config ACPI_BLACKLIST_YEAR
279 int "Disable ACPI for systems before Jan 1st this year" if X86_32
282 enter a 4-digit year, eg. 2001 to disable ACPI by default
283 on platforms with DMI BIOS date before January 1st that year.
284 "acpi=force" can be used to override this mechanism.
286 Enter 0 to disable this mechanism and allow ACPI to
287 run by default no matter what the year. (default)
290 bool "Debug Statements"
293 The ACPI driver can optionally report errors with a great deal
294 of verbosity. Saying Y enables these statements. This will increase
295 your kernel size by around 50K.
297 config ACPI_DEBUG_FUNC_TRACE
298 bool "Additionally enable ACPI function tracing"
300 depends on ACPI_DEBUG
302 ACPI Debug Statements slow down ACPI processing. Function trace
303 is about half of the penalty and is rarely useful.
309 This driver is required on some systems for the proper operation of
310 the battery and thermal drivers. If you are compiling for a
311 mobile system, say Y.
321 This driver will enable your system to shut down using ACPI, and
322 dump your ACPI DSDT table using /proc/acpi/dsdt.
325 bool "Power Management Timer Support" if EMBEDDED
329 The Power Management Timer is available on all ACPI-capable,
330 in most cases even if ACPI is unusable or blacklisted.
332 This timing source is not affected by power management features
333 like aggressive processor idling, throttling, frequency and/or
334 voltage scaling, unlike the commonly used Time Stamp Counter
337 You should nearly always say Y here because many modern
338 systems require this timer.
340 config ACPI_CONTAINER
341 tristate "ACPI0004,PNP0A05 and PNP0A06 Container Driver (EXPERIMENTAL)"
342 depends on EXPERIMENTAL
343 default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU || ACPI_HOTPLUG_IO)
345 This allows _physical_ insertion and removal of CPUs and memory.
346 This can be useful, for example, on NUMA machines that support
347 ACPI based physical hotplug of nodes, or non-NUMA machines that
348 support physical cpu/memory hot-plug.
350 If one selects "m", this driver can be loaded with
351 "modprobe acpi_container".
353 config ACPI_HOTPLUG_MEMORY
354 tristate "Memory Hotplug"
355 depends on MEMORY_HOTPLUG
358 This driver adds supports for ACPI Memory Hotplug. This driver
359 provides support for fielding notifications on ACPI memory
360 devices (PNP0C80) which represent memory ranges that may be
361 onlined or offlined during runtime.
363 Enabling this driver assumes that your platform hardware
364 and firmware have support for hot-plugging physical memory. If
365 your system does not support physically adding or ripping out
366 memory DIMMs at some platform defined granularity (individually
367 or as a bank) at runtime, then you need not enable this driver.
369 If one selects "m," this driver can be loaded using the following
371 $>modprobe acpi_memhotplug
374 tristate "Smart Battery System"
377 This driver adds support for the Smart Battery System, another
378 type of access to battery information, found on some laptops.