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56 they have been replaced by functions in /sys.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77 they have been replaced by functions in /sys.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 (Windows Management
211 Instrumentation) mapper device (PNP0C14) found on some systems.
213 ACPI-WMI is a proprietary extension to ACPI to expose parts of the
214 ACPI firmware to userspace - this is done through various vendor
215 defined methods and data blocks in a PNP0C14 device, which are then
216 made available for userspace to call.
218 The implementation of this in Linux currently only exposes this to
219 other kernel space drivers.
221 This driver is a required dependency to build the firmware specific
222 drivers needed on many machines, including Acer and HP laptops.
224 It is safe to enable this driver even if your DSDT doesn't define
225 any ACPI-WMI devices.
228 tristate "ASUS/Medion Laptop Extras"
230 select BACKLIGHT_CLASS_DEVICE
232 This driver provides support for extra features of ACPI-compatible
233 ASUS laptops. As some of Medion laptops are made by ASUS, it may also
234 support some Medion laptops (such as 9675 for example). It makes all
235 the extra buttons generate standard ACPI events that go through
236 /proc/acpi/events, and (on some models) adds support for changing the
237 display brightness and output, switching the LCD backlight on and off,
238 and most importantly, allows you to blink those fancy LEDs intended
239 for reporting mail and wireless status.
241 Note: display switching code is currently considered EXPERIMENTAL,
242 toying with these values may even lock your machine.
244 All settings are changed via /proc/acpi/asus directory entries. Owner
245 and group for these entries can be set with asus_uid and asus_gid
248 More information and a userspace daemon for handling the extra buttons
249 at <http://sourceforge.net/projects/acpi4asus/>.
251 If you have an ACPI-compatible ASUS laptop, say Y or M here. This
252 driver is still under development, so if your laptop is unsupported or
253 something works not quite as expected, please use the mailing list
254 available on the above page (acpi4asus-user@lists.sourceforge.net).
256 NOTE: This driver is deprecated and will probably be removed soon,
257 use asus-laptop instead.
260 tristate "Toshiba Laptop Extras"
262 select BACKLIGHT_CLASS_DEVICE
264 This driver adds support for access to certain system settings
265 on "legacy free" Toshiba laptops. These laptops can be recognized by
266 their lack of a BIOS setup menu and APM support.
268 On these machines, all system configuration is handled through the
269 ACPI. This driver is required for access to controls not covered
270 by the general ACPI drivers, such as LCD brightness, video output,
273 This driver differs from the non-ACPI Toshiba laptop driver (located
274 under "Processor type and features") in several aspects.
275 Configuration is accessed by reading and writing text files in the
276 /proc tree instead of by program interface to /dev. Furthermore, no
277 power management functions are exposed, as those are handled by the
278 general ACPI drivers.
280 More information about this driver is available at
281 <http://memebeam.org/toys/ToshibaAcpiDriver>.
283 If you have a legacy free Toshiba laptop (such as the Libretto L1
286 config ACPI_CUSTOM_DSDT_FILE
287 string "Custom DSDT Table file to include"
289 depends on !STANDALONE
291 This option supports a custom DSDT by linking it into the kernel.
292 See Documentation/acpi/dsdt-override.txt
294 Enter the full path name to the file which includes the AmlCode
297 If unsure, don't enter a file name.
299 config ACPI_CUSTOM_DSDT
301 default ACPI_CUSTOM_DSDT_FILE != ""
303 config ACPI_CUSTOM_DSDT_INITRD
304 bool "Read Custom DSDT from initramfs"
305 depends on BLK_DEV_INITRD
308 This option supports a custom DSDT by optionally loading it from initrd.
309 See Documentation/acpi/dsdt-override.txt
311 If you are not using this feature now, but may use it later,
312 it is safe to say Y here.
314 config ACPI_BLACKLIST_YEAR
315 int "Disable ACPI for systems before Jan 1st this year" if X86_32
318 enter a 4-digit year, eg. 2001 to disable ACPI by default
319 on platforms with DMI BIOS date before January 1st that year.
320 "acpi=force" can be used to override this mechanism.
322 Enter 0 to disable this mechanism and allow ACPI to
323 run by default no matter what the year. (default)
326 bool "Debug Statements"
329 The ACPI driver can optionally report errors with a great deal
330 of verbosity. Saying Y enables these statements. This will increase
331 your kernel size by around 50K.
333 config ACPI_DEBUG_FUNC_TRACE
334 bool "Additionally enable ACPI function tracing"
336 depends on ACPI_DEBUG
338 ACPI Debug Statements slow down ACPI processing. Function trace
339 is about half of the penalty and is rarely useful.
345 This driver is required on some systems for the proper operation of
346 the battery and thermal drivers. If you are compiling for a
347 mobile system, say Y.
357 This driver will enable your system to shut down using ACPI, and
358 dump your ACPI DSDT table using /proc/acpi/dsdt.
361 bool "Power Management Timer Support" if EMBEDDED
365 The Power Management Timer is available on all ACPI-capable,
366 in most cases even if ACPI is unusable or blacklisted.
368 This timing source is not affected by power management features
369 like aggressive processor idling, throttling, frequency and/or
370 voltage scaling, unlike the commonly used Time Stamp Counter
373 You should nearly always say Y here because many modern
374 systems require this timer.
376 config ACPI_CONTAINER
377 tristate "ACPI0004,PNP0A05 and PNP0A06 Container Driver (EXPERIMENTAL)"
378 depends on EXPERIMENTAL
379 default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU || ACPI_HOTPLUG_IO)
381 This allows _physical_ insertion and removal of CPUs and memory.
382 This can be useful, for example, on NUMA machines that support
383 ACPI based physical hotplug of nodes, or non-NUMA machines that
384 support physical cpu/memory hot-plug.
386 If one selects "m", this driver can be loaded with
387 "modprobe acpi_container".
389 config ACPI_HOTPLUG_MEMORY
390 tristate "Memory Hotplug"
391 depends on MEMORY_HOTPLUG
394 This driver adds supports for ACPI Memory Hotplug. This driver
395 provides support for fielding notifications on ACPI memory
396 devices (PNP0C80) which represent memory ranges that may be
397 onlined or offlined during runtime.
399 Enabling this driver assumes that your platform hardware
400 and firmware have support for hot-plugging physical memory. If
401 your system does not support physically adding or ripping out
402 memory DIMMs at some platform defined granularity (individually
403 or as a bank) at runtime, then you need not enable this driver.
405 If one selects "m," this driver can be loaded using the following
407 $>modprobe acpi_memhotplug
410 tristate "Smart Battery System"
413 This driver adds support for the Smart Battery System, another
414 type of access to battery information, found on some laptops.