6 bool "ACPI (Advanced Configuration and Power Interface) Support"
7 depends on !IA64_HP_SIM
14 Advanced Configuration and Power Interface (ACPI) support for
15 Linux requires an ACPI compliant platform (hardware/firmware),
16 and assumes the presence of OS-directed configuration and power
17 management (OSPM) software. This option will enlarge your
20 Linux ACPI provides a robust functional replacement for several
21 legacy configuration and power management interfaces, including
22 the Plug-and-Play BIOS specification (PnP BIOS), the
23 MultiProcessor Specification (MPS), and the Advanced Power
24 Management (APM) specification. If both ACPI and APM support
25 are configured, whichever is loaded first shall be used.
27 The ACPI SourceForge project contains the latest source code,
28 documentation, tools, mailing list subscription, and other
29 information. This project is available at:
30 <http://sourceforge.net/projects/acpi>
32 Linux support for ACPI is based on Intel Corporation's ACPI
33 Component Architecture (ACPI CA). For more information see:
34 <http://developer.intel.com/technology/iapc/acpi>
36 ACPI is an open industry specification co-developed by Compaq,
37 Intel, Microsoft, Phoenix, and Toshiba. The specification is
39 <http://www.acpi.info>
49 bool "Deprecated /proc/acpi files"
52 For backwards compatibility, this option allows
53 deprecated /proc/acpi/ files to exist, even when
54 they have been replaced by functions in /sys.
55 The deprecated files (and their replacements) include:
57 /proc/acpi/sleep (/sys/power/state)
58 /proc/acpi/info (/sys/modules/acpi/parameters/acpica_version)
59 /proc/acpi/dsdt (/sys/firmware/acpi/tables/DSDT)
60 /proc/acpi/fadt (/sys/firmware/acpi/tables/FACP)
61 /proc/acpi/debug_layer (/sys/module/acpi/parameters/debug_layer)
62 /proc/acpi/debug_level (/sys/module/acpi/parameters/debug_level)
64 This option has no effect on /proc/acpi/ files
65 and functions which do not yet exist in /sys.
67 Say N to delete /proc/acpi/ files that have moved to /sys/
68 config ACPI_PROCFS_POWER
69 bool "Deprecated power /proc/acpi directories"
73 For backwards compatibility, this option allows
74 deprecated power /proc/acpi/ directories to exist, even when
75 they have been replaced by functions in /sys.
76 The deprecated directories (and their replacements) include:
77 /proc/acpi/battery/* (/sys/class/power_supply/*)
78 /proc/acpi/ac_adapter/* (sys/class/power_supply/*)
79 This option has no effect on /proc/acpi/ directories
80 and functions, which do not yet exist in /sys
82 Say N to delete power /proc/acpi/ directories that have moved to /sys/
84 config ACPI_SYSFS_POWER
85 bool "Future power /sys interface"
89 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
143 This driver implement the ACPI Extensions For Display Adapters
144 for integrated graphics devices on motherboard, as specified in
145 ACPI 2.0 Specification, Appendix B, allowing to perform some basic
146 control like defining the video POST device, retrieving EDID information
147 or to setup a video output, etc.
148 Note that this is an ref. implementation only. It may or may not work
149 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
178 This driver installs ACPI as the idle handler for Linux, and uses
179 ACPI C2 and C3 processor states to save power, on systems that
180 support it. It is required by several flavors of cpufreq
181 Performance-state drivers.
183 config ACPI_HOTPLUG_CPU
185 depends on ACPI_PROCESSOR && HOTPLUG_CPU
186 select ACPI_CONTAINER
190 tristate "Thermal Zone"
191 depends on ACPI_PROCESSOR
195 This driver adds support for ACPI thermal zones. Most mobile and
196 some desktop systems support ACPI thermal zones. It is HIGHLY
197 recommended that this option be enabled, as your processor(s)
198 may be damaged without it.
203 depends on (X86 || IA64)
204 default y if IA64_GENERIC || IA64_SGI_SN2
207 tristate "WMI (EXPERIMENTAL)"
209 depends on EXPERIMENTAL
211 This driver adds support for the ACPI-WMI (Windows Management
212 Instrumentation) mapper device (PNP0C14) found on some systems.
214 ACPI-WMI is a proprietary extension to ACPI to expose parts of the
215 ACPI firmware to userspace - this is done through various vendor
216 defined methods and data blocks in a PNP0C14 device, which are then
217 made available for userspace to call.
219 The implementation of this in Linux currently only exposes this to
220 other kernel space drivers.
222 This driver is a required dependency to build the firmware specific
223 drivers needed on many machines, including Acer and HP laptops.
225 It is safe to enable this driver even if your DSDT doesn't define
226 any ACPI-WMI devices.
229 tristate "ASUS/Medion Laptop Extras"
231 select BACKLIGHT_CLASS_DEVICE
233 This driver provides support for extra features of ACPI-compatible
234 ASUS laptops. As some of Medion laptops are made by ASUS, it may also
235 support some Medion laptops (such as 9675 for example). It makes all
236 the extra buttons generate standard ACPI events that go through
237 /proc/acpi/events, and (on some models) adds support for changing the
238 display brightness and output, switching the LCD backlight on and off,
239 and most importantly, allows you to blink those fancy LEDs intended
240 for reporting mail and wireless status.
242 Note: display switching code is currently considered EXPERIMENTAL,
243 toying with these values may even lock your machine.
245 All settings are changed via /proc/acpi/asus directory entries. Owner
246 and group for these entries can be set with asus_uid and asus_gid
249 More information and a userspace daemon for handling the extra buttons
250 at <http://sourceforge.net/projects/acpi4asus/>.
252 If you have an ACPI-compatible ASUS laptop, say Y or M here. This
253 driver is still under development, so if your laptop is unsupported or
254 something works not quite as expected, please use the mailing list
255 available on the above page (acpi4asus-user@lists.sourceforge.net).
257 NOTE: This driver is deprecated and will probably be removed soon,
258 use asus-laptop instead.
261 tristate "Toshiba Laptop Extras"
263 select BACKLIGHT_CLASS_DEVICE
265 This driver adds support for access to certain system settings
266 on "legacy free" Toshiba laptops. These laptops can be recognized by
267 their lack of a BIOS setup menu and APM support.
269 On these machines, all system configuration is handled through the
270 ACPI. This driver is required for access to controls not covered
271 by the general ACPI drivers, such as LCD brightness, video output,
274 This driver differs from the non-ACPI Toshiba laptop driver (located
275 under "Processor type and features") in several aspects.
276 Configuration is accessed by reading and writing text files in the
277 /proc tree instead of by program interface to /dev. Furthermore, no
278 power management functions are exposed, as those are handled by the
279 general ACPI drivers.
281 More information about this driver is available at
282 <http://memebeam.org/toys/ToshibaAcpiDriver>.
284 If you have a legacy free Toshiba laptop (such as the Libretto L1
287 config ACPI_CUSTOM_DSDT_FILE
288 string "Custom DSDT Table file to include"
290 depends on !STANDALONE
292 This option supports a custom DSDT by linking it into the kernel.
293 See Documentation/acpi/dsdt-override.txt
295 Enter the full path name to the file which includes the AmlCode
298 If unsure, don't enter a file name.
300 config ACPI_CUSTOM_DSDT
302 default ACPI_CUSTOM_DSDT_FILE != ""
304 config ACPI_BLACKLIST_YEAR
305 int "Disable ACPI for systems before Jan 1st this year" if X86_32
308 enter a 4-digit year, eg. 2001 to disable ACPI by default
309 on platforms with DMI BIOS date before January 1st that year.
310 "acpi=force" can be used to override this mechanism.
312 Enter 0 to disable this mechanism and allow ACPI to
313 run by default no matter what the year. (default)
316 bool "Debug Statements"
319 The ACPI driver can optionally report errors with a great deal
320 of verbosity. Saying Y enables these statements. This will increase
321 your kernel size by around 50K.
323 config ACPI_DEBUG_FUNC_TRACE
324 bool "Additionally enable ACPI function tracing"
326 depends on ACPI_DEBUG
328 ACPI Debug Statements slow down ACPI processing. Function trace
329 is about half of the penalty and is rarely useful.
335 This driver is required on some systems for the proper operation of
336 the battery and thermal drivers. If you are compiling for a
337 mobile system, say Y.
347 This driver will enable your system to shut down using ACPI, and
348 dump your ACPI DSDT table using /proc/acpi/dsdt.
351 bool "Power Management Timer Support" if EMBEDDED
355 The Power Management Timer is available on all ACPI-capable,
356 in most cases even if ACPI is unusable or blacklisted.
358 This timing source is not affected by power management features
359 like aggressive processor idling, throttling, frequency and/or
360 voltage scaling, unlike the commonly used Time Stamp Counter
363 You should nearly always say Y here because many modern
364 systems require this timer.
366 config ACPI_CONTAINER
367 tristate "ACPI0004,PNP0A05 and PNP0A06 Container Driver (EXPERIMENTAL)"
368 depends on EXPERIMENTAL
369 default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU || ACPI_HOTPLUG_IO)
371 This allows _physical_ insertion and removal of CPUs and memory.
372 This can be useful, for example, on NUMA machines that support
373 ACPI based physical hotplug of nodes, or non-NUMA machines that
374 support physical cpu/memory hot-plug.
376 If one selects "m", this driver can be loaded with
377 "modprobe acpi_container".
379 config ACPI_HOTPLUG_MEMORY
380 tristate "Memory Hotplug"
381 depends on MEMORY_HOTPLUG
384 This driver adds supports for ACPI Memory Hotplug. This driver
385 provides support for fielding notifications on ACPI memory
386 devices (PNP0C80) which represent memory ranges that may be
387 onlined or offlined during runtime.
389 Enabling this driver assumes that your platform hardware
390 and firmware have support for hot-plugging physical memory. If
391 your system does not support physically adding or ripping out
392 memory DIMMs at some platform defined granularity (individually
393 or as a bank) at runtime, then you need not enable this driver.
395 If one selects "m," this driver can be loaded using the following
397 $>modprobe acpi_memhotplug
400 tristate "Smart Battery System"
403 This driver adds support for the Smart Battery System, another
404 type of access to battery information, found on some laptops.