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56 they have been replaced by functions in /sys.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77 they have been replaced by functions in /sys.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
144 This driver implement the ACPI Extensions For Display Adapters
145 for integrated graphics devices on motherboard, as specified in
146 ACPI 2.0 Specification, Appendix B, allowing to perform some basic
147 control like defining the video POST device, retrieving EDID information
148 or to setup a video output, etc.
149 Note that this is an ref. implementation only. It may or may not work
150 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
177 This driver installs ACPI as the idle handler for Linux, and uses
178 ACPI C2 and C3 processor states to save power, on systems that
179 support it. It is required by several flavors of cpufreq
180 Performance-state drivers.
182 config ACPI_HOTPLUG_CPU
184 depends on ACPI_PROCESSOR && HOTPLUG_CPU
185 select ACPI_CONTAINER
189 tristate "Thermal Zone"
190 depends on ACPI_PROCESSOR
194 This driver adds support for ACPI thermal zones. Most mobile and
195 some desktop systems support ACPI thermal zones. It is HIGHLY
196 recommended that this option be enabled, as your processor(s)
197 may be damaged without it.
202 depends on (X86 || IA64)
203 default y if IA64_GENERIC || IA64_SGI_SN2
206 tristate "WMI (EXPERIMENTAL)"
208 depends on EXPERIMENTAL
210 This driver adds support for the ACPI-WMI mapper device (PNP0C14)
211 found on some systems.
213 NOTE: You will need another driver or userspace application on top of
214 this to actually use anything defined in the ACPI-WMI mapper.
217 tristate "ASUS/Medion Laptop Extras"
219 select BACKLIGHT_CLASS_DEVICE
221 This driver provides support for extra features of ACPI-compatible
222 ASUS laptops. As some of Medion laptops are made by ASUS, it may also
223 support some Medion laptops (such as 9675 for example). It makes all
224 the extra buttons generate standard ACPI events that go through
225 /proc/acpi/events, and (on some models) adds support for changing the
226 display brightness and output, switching the LCD backlight on and off,
227 and most importantly, allows you to blink those fancy LEDs intended
228 for reporting mail and wireless status.
230 Note: display switching code is currently considered EXPERIMENTAL,
231 toying with these values may even lock your machine.
233 All settings are changed via /proc/acpi/asus directory entries. Owner
234 and group for these entries can be set with asus_uid and asus_gid
237 More information and a userspace daemon for handling the extra buttons
238 at <http://sourceforge.net/projects/acpi4asus/>.
240 If you have an ACPI-compatible ASUS laptop, say Y or M here. This
241 driver is still under development, so if your laptop is unsupported or
242 something works not quite as expected, please use the mailing list
243 available on the above page (acpi4asus-user@lists.sourceforge.net).
245 NOTE: This driver is deprecated and will probably be removed soon,
246 use asus-laptop instead.
249 tristate "Toshiba Laptop Extras"
251 select BACKLIGHT_CLASS_DEVICE
253 This driver adds support for access to certain system settings
254 on "legacy free" Toshiba laptops. These laptops can be recognized by
255 their lack of a BIOS setup menu and APM support.
257 On these machines, all system configuration is handled through the
258 ACPI. This driver is required for access to controls not covered
259 by the general ACPI drivers, such as LCD brightness, video output,
262 This driver differs from the non-ACPI Toshiba laptop driver (located
263 under "Processor type and features") in several aspects.
264 Configuration is accessed by reading and writing text files in the
265 /proc tree instead of by program interface to /dev. Furthermore, no
266 power management functions are exposed, as those are handled by the
267 general ACPI drivers.
269 More information about this driver is available at
270 <http://memebeam.org/toys/ToshibaAcpiDriver>.
272 If you have a legacy free Toshiba laptop (such as the Libretto L1
275 config ACPI_CUSTOM_DSDT
276 bool "Include Custom DSDT"
277 depends on !STANDALONE
280 This option supports a custom DSDT by linking it into the kernel.
281 See Documentation/acpi/dsdt-override.txt
285 config ACPI_CUSTOM_DSDT_FILE
286 string "Custom DSDT Table file to include"
287 depends on ACPI_CUSTOM_DSDT
290 Enter the full path name to the file which includes the AmlCode
293 config ACPI_CUSTOM_DSDT_INITRD
294 bool "Read Custom DSDT from initramfs"
295 depends on BLK_DEV_INITRD
298 This option supports a custom DSDT by optionally loading it from initrd.
299 See Documentation/acpi/dsdt-override.txt
301 If you are not using this feature now, but may use it later,
302 it is safe to say Y here.
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.