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56 they have been replaced by functions in /sys.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77 they have been replaced by functions in /sys.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
191 This driver adds support for ACPI thermal zones. Most mobile and
192 some desktop systems support ACPI thermal zones. It is HIGHLY
193 recommended that this option be enabled, as your processor(s)
194 may be damaged without it.
199 depends on (X86 || IA64)
200 default y if IA64_GENERIC || IA64_SGI_SN2
203 tristate "ASUS/Medion Laptop Extras"
205 select BACKLIGHT_CLASS_DEVICE
207 This driver provides support for extra features of ACPI-compatible
208 ASUS laptops. As some of Medion laptops are made by ASUS, it may also
209 support some Medion laptops (such as 9675 for example). It makes all
210 the extra buttons generate standard ACPI events that go through
211 /proc/acpi/events, and (on some models) adds support for changing the
212 display brightness and output, switching the LCD backlight on and off,
213 and most importantly, allows you to blink those fancy LEDs intended
214 for reporting mail and wireless status.
216 Note: display switching code is currently considered EXPERIMENTAL,
217 toying with these values may even lock your machine.
219 All settings are changed via /proc/acpi/asus directory entries. Owner
220 and group for these entries can be set with asus_uid and asus_gid
223 More information and a userspace daemon for handling the extra buttons
224 at <http://sourceforge.net/projects/acpi4asus/>.
226 If you have an ACPI-compatible ASUS laptop, say Y or M here. This
227 driver is still under development, so if your laptop is unsupported or
228 something works not quite as expected, please use the mailing list
229 available on the above page (acpi4asus-user@lists.sourceforge.net).
231 NOTE: This driver is deprecated and will probably be removed soon,
232 use asus-laptop instead.
235 tristate "Toshiba Laptop Extras"
237 select BACKLIGHT_CLASS_DEVICE
239 This driver adds support for access to certain system settings
240 on "legacy free" Toshiba laptops. These laptops can be recognized by
241 their lack of a BIOS setup menu and APM support.
243 On these machines, all system configuration is handled through the
244 ACPI. This driver is required for access to controls not covered
245 by the general ACPI drivers, such as LCD brightness, video output,
248 This driver differs from the non-ACPI Toshiba laptop driver (located
249 under "Processor type and features") in several aspects.
250 Configuration is accessed by reading and writing text files in the
251 /proc tree instead of by program interface to /dev. Furthermore, no
252 power management functions are exposed, as those are handled by the
253 general ACPI drivers.
255 More information about this driver is available at
256 <http://memebeam.org/toys/ToshibaAcpiDriver>.
258 If you have a legacy free Toshiba laptop (such as the Libretto L1
261 config ACPI_CUSTOM_DSDT
262 bool "Include Custom DSDT"
263 depends on !STANDALONE
266 This option is to load a custom ACPI DSDT
267 If you don't know what that is, say N.
269 config ACPI_CUSTOM_DSDT_FILE
270 string "Custom DSDT Table file to include"
271 depends on ACPI_CUSTOM_DSDT
274 Enter the full path name to the file which includes the AmlCode
277 config ACPI_CUSTOM_DSDT_INITRD
278 bool "Read Custom DSDT from initramfs"
279 depends on BLK_DEV_INITRD
282 The DSDT (Differentiated System Description Table) often needs to be
283 overridden because of broken BIOS implementations. If this feature is
284 activated you will be able to provide a customized DSDT by adding it
285 to your initramfs. If your mkinitrd tool does not support this feature
286 a script is provided in the documentation. For more details see
287 <file:Documentation/dsdt-initrd.txt> or <http://gaugusch.at/kernel.shtml>.
288 If there is no table found, it will fall-back to the custom DSDT
289 in-kernel (if activated) or to the DSDT from the BIOS.
291 Even if you do not need a new one at the moment, you may want to use a
292 better DSDT later. It is safe to say Y here.
294 config ACPI_BLACKLIST_YEAR
295 int "Disable ACPI for systems before Jan 1st this year" if X86_32
298 enter a 4-digit year, eg. 2001 to disable ACPI by default
299 on platforms with DMI BIOS date before January 1st that year.
300 "acpi=force" can be used to override this mechanism.
302 Enter 0 to disable this mechanism and allow ACPI to
303 run by default no matter what the year. (default)
306 bool "Debug Statements"
309 The ACPI driver can optionally report errors with a great deal
310 of verbosity. Saying Y enables these statements. This will increase
311 your kernel size by around 50K.
313 config ACPI_DEBUG_FUNC_TRACE
314 bool "Additionally enable ACPI function tracing"
316 depends on ACPI_DEBUG
318 ACPI Debug Statements slow down ACPI processing. Function trace
319 is about half of the penalty and is rarely useful.
325 This driver is required on some systems for the proper operation of
326 the battery and thermal drivers. If you are compiling for a
327 mobile system, say Y.
337 This driver will enable your system to shut down using ACPI, and
338 dump your ACPI DSDT table using /proc/acpi/dsdt.
341 bool "Power Management Timer Support" if EMBEDDED
345 The Power Management Timer is available on all ACPI-capable,
346 in most cases even if ACPI is unusable or blacklisted.
348 This timing source is not affected by power management features
349 like aggressive processor idling, throttling, frequency and/or
350 voltage scaling, unlike the commonly used Time Stamp Counter
353 You should nearly always say Y here because many modern
354 systems require this timer.
356 config ACPI_CONTAINER
357 tristate "ACPI0004,PNP0A05 and PNP0A06 Container Driver (EXPERIMENTAL)"
358 depends on EXPERIMENTAL
359 default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU || ACPI_HOTPLUG_IO)
361 This allows _physical_ insertion and removal of CPUs and memory.
362 This can be useful, for example, on NUMA machines that support
363 ACPI based physical hotplug of nodes, or non-NUMA machines that
364 support physical cpu/memory hot-plug.
366 If one selects "m", this driver can be loaded with
367 "modprobe acpi_container".
369 config ACPI_HOTPLUG_MEMORY
370 tristate "Memory Hotplug"
371 depends on MEMORY_HOTPLUG
374 This driver adds supports for ACPI Memory Hotplug. This driver
375 provides support for fielding notifications on ACPI memory
376 devices (PNP0C80) which represent memory ranges that may be
377 onlined or offlined during runtime.
379 Enabling this driver assumes that your platform hardware
380 and firmware have support for hot-plugging physical memory. If
381 your system does not support physically adding or ripping out
382 memory DIMMs at some platform defined granularity (individually
383 or as a bank) at runtime, then you need not enable this driver.
385 If one selects "m," this driver can be loaded using the following
387 $>modprobe acpi_memhotplug
390 tristate "Smart Battery System"
393 This driver adds support for the Smart Battery System, another
394 type of access to battery information, found on some laptops.