6 bool "ACPI (Advanced Configuration and Power Interface) Support"
8 depends on !IA64_HP_SIM
15 Advanced Configuration and Power Interface (ACPI) support for
16 Linux requires an ACPI compliant platform (hardware/firmware),
17 and assumes the presence of OS-directed configuration and power
18 management (OSPM) software. This option will enlarge your
21 Linux ACPI provides a robust functional replacement for several
22 legacy configuration and power management interfaces, including
23 the Plug-and-Play BIOS specification (PnP BIOS), the
24 MultiProcessor Specification (MPS), and the Advanced Power
25 Management (APM) specification. If both ACPI and APM support
26 are configured, whichever is loaded first shall be used.
28 The ACPI SourceForge project contains the latest source code,
29 documentation, tools, mailing list subscription, and other
30 information. This project is available at:
31 <http://sourceforge.net/projects/acpi>
33 Linux support for ACPI is based on Intel Corporation's ACPI
34 Component Architecture (ACPI CA). For more information see:
35 <http://developer.intel.com/technology/iapc/acpi>
37 ACPI is an open industry specification co-developed by Compaq,
38 Intel, Microsoft, Phoenix, and Toshiba. The specification is
40 <http://www.acpi.info>
50 bool "Deprecated /proc/acpi files"
53 For backwards compatibility, this option allows
54 deprecated /proc/acpi/ files to exist, even when
55 they have been replaced by functions in /sys.
56 The deprecated files (and their replacements) include:
58 /proc/acpi/sleep (/sys/power/state)
59 /proc/acpi/info (/sys/modules/acpi/parameters/acpica_version)
60 /proc/acpi/dsdt (/sys/firmware/acpi/tables/DSDT)
61 /proc/acpi/fadt (/sys/firmware/acpi/tables/FACP)
62 /proc/acpi/debug_layer (/sys/module/acpi/parameters/debug_layer)
63 /proc/acpi/debug_level (/sys/module/acpi/parameters/debug_level)
65 This option has no effect on /proc/acpi/ files
66 and functions which do not yet exist in /sys.
68 Say N to delete /proc/acpi/ files that have moved to /sys/
69 config ACPI_PROCFS_POWER
70 bool "Deprecated power /proc/acpi directories"
74 For backwards compatibility, this option allows
75 deprecated power /proc/acpi/ directories to exist, even when
76 they have been replaced by functions in /sys.
77 The deprecated directories (and their replacements) include:
78 /proc/acpi/battery/* (/sys/class/power_supply/*)
79 /proc/acpi/ac_adapter/* (sys/class/power_supply/*)
80 This option has no effect on /proc/acpi/ directories
81 and functions, which do not yet exist in /sys
83 Say N to delete power /proc/acpi/ directories that have moved to /sys/
85 config ACPI_SYSFS_POWER
86 bool "Future power /sys interface"
90 Say N to disable power /sys interface
92 config ACPI_PROC_EVENT
93 bool "Deprecated /proc/acpi/event support"
97 A user-space daemon, acpi, typically read /proc/acpi/event
98 and handled all ACPI sub-system generated events.
100 These events are now delivered to user-space via
101 either the input layer, or as netlink events.
103 This build option enables the old code for legacy
104 user-space implementation. After some time, this will
105 be moved under CONFIG_ACPI_PROCFS, and then deleted.
107 Say Y here to retain the old behaviour. Say N if your
108 user-space is newer than kernel 2.6.23 (September 2007).
111 tristate "AC Adapter"
115 This driver adds support for the AC Adapter object, which indicates
116 whether a system is on AC, or not. If you have a system that can
117 switch between A/C and battery, say Y.
124 This driver adds support for battery information through
125 /proc/acpi/battery. If you have a mobile system with a battery,
133 This driver handles events on the power, sleep and lid buttons.
134 A daemon reads /proc/acpi/event and perform user-defined actions
135 such as shutting down the system. This is necessary for
136 software controlled poweroff.
140 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.
157 This driver adds support for ACPI fan devices, allowing user-mode
158 applications to perform basic fan control (on, off, status).
162 depends on EXPERIMENTAL
164 This driver adds support for ACPI controlled docking stations
167 tristate "Removable Drive Bay (EXPERIMENTAL)"
168 depends on EXPERIMENTAL
171 This driver adds support for ACPI controlled removable drive
172 bays such as the IBM ultrabay or the Dell Module Bay.
174 config ACPI_PROCESSOR
179 This driver installs ACPI as the idle handler for Linux, and uses
180 ACPI C2 and C3 processor states to save power, on systems that
181 support it. It is required by several flavors of cpufreq
182 Performance-state drivers.
184 config ACPI_HOTPLUG_CPU
186 depends on ACPI_PROCESSOR && HOTPLUG_CPU
187 select ACPI_CONTAINER
191 tristate "Thermal Zone"
192 depends on ACPI_PROCESSOR
196 This driver adds support for ACPI thermal zones. Most mobile and
197 some desktop systems support ACPI thermal zones. It is HIGHLY
198 recommended that this option be enabled, as your processor(s)
199 may be damaged without it.
204 depends on (X86 || IA64)
205 default y if IA64_GENERIC || IA64_SGI_SN2
208 tristate "WMI (EXPERIMENTAL)"
210 depends on EXPERIMENTAL
212 This driver adds support for the ACPI-WMI (Windows Management
213 Instrumentation) mapper device (PNP0C14) found on some systems.
215 ACPI-WMI is a proprietary extension to ACPI to expose parts of the
216 ACPI firmware to userspace - this is done through various vendor
217 defined methods and data blocks in a PNP0C14 device, which are then
218 made available for userspace to call.
220 The implementation of this in Linux currently only exposes this to
221 other kernel space drivers.
223 This driver is a required dependency to build the firmware specific
224 drivers needed on many machines, including Acer and HP laptops.
226 It is safe to enable this driver even if your DSDT doesn't define
227 any ACPI-WMI devices.
230 tristate "ASUS/Medion Laptop Extras"
232 select BACKLIGHT_CLASS_DEVICE
234 This driver provides support for extra features of ACPI-compatible
235 ASUS laptops. As some of Medion laptops are made by ASUS, it may also
236 support some Medion laptops (such as 9675 for example). It makes all
237 the extra buttons generate standard ACPI events that go through
238 /proc/acpi/events, and (on some models) adds support for changing the
239 display brightness and output, switching the LCD backlight on and off,
240 and most importantly, allows you to blink those fancy LEDs intended
241 for reporting mail and wireless status.
243 Note: display switching code is currently considered EXPERIMENTAL,
244 toying with these values may even lock your machine.
246 All settings are changed via /proc/acpi/asus directory entries. Owner
247 and group for these entries can be set with asus_uid and asus_gid
250 More information and a userspace daemon for handling the extra buttons
251 at <http://sourceforge.net/projects/acpi4asus/>.
253 If you have an ACPI-compatible ASUS laptop, say Y or M here. This
254 driver is still under development, so if your laptop is unsupported or
255 something works not quite as expected, please use the mailing list
256 available on the above page (acpi4asus-user@lists.sourceforge.net).
258 NOTE: This driver is deprecated and will probably be removed soon,
259 use asus-laptop instead.
262 tristate "Toshiba Laptop Extras"
264 select BACKLIGHT_CLASS_DEVICE
266 This driver adds support for access to certain system settings
267 on "legacy free" Toshiba laptops. These laptops can be recognized by
268 their lack of a BIOS setup menu and APM support.
270 On these machines, all system configuration is handled through the
271 ACPI. This driver is required for access to controls not covered
272 by the general ACPI drivers, such as LCD brightness, video output,
275 This driver differs from the non-ACPI Toshiba laptop driver (located
276 under "Processor type and features") in several aspects.
277 Configuration is accessed by reading and writing text files in the
278 /proc tree instead of by program interface to /dev. Furthermore, no
279 power management functions are exposed, as those are handled by the
280 general ACPI drivers.
282 More information about this driver is available at
283 <http://memebeam.org/toys/ToshibaAcpiDriver>.
285 If you have a legacy free Toshiba laptop (such as the Libretto L1
288 config ACPI_CUSTOM_DSDT_FILE
289 string "Custom DSDT Table file to include"
291 depends on !STANDALONE
293 This option supports a custom DSDT by linking it into the kernel.
294 See Documentation/acpi/dsdt-override.txt
296 Enter the full path name to the file which includes the AmlCode
299 If unsure, don't enter a file name.
301 config ACPI_CUSTOM_DSDT
303 default ACPI_CUSTOM_DSDT_FILE != ""
305 config ACPI_BLACKLIST_YEAR
306 int "Disable ACPI for systems before Jan 1st this year" if X86_32
309 enter a 4-digit year, eg. 2001 to disable ACPI by default
310 on platforms with DMI BIOS date before January 1st that year.
311 "acpi=force" can be used to override this mechanism.
313 Enter 0 to disable this mechanism and allow ACPI to
314 run by default no matter what the year. (default)
317 bool "Debug Statements"
320 The ACPI driver can optionally report errors with a great deal
321 of verbosity. Saying Y enables these statements. This will increase
322 your kernel size by around 50K.
324 config ACPI_DEBUG_FUNC_TRACE
325 bool "Additionally enable ACPI function tracing"
327 depends on ACPI_DEBUG
329 ACPI Debug Statements slow down ACPI processing. Function trace
330 is about half of the penalty and is rarely useful.
336 This driver is required on some systems for the proper operation of
337 the battery and thermal drivers. If you are compiling for a
338 mobile system, say Y.
348 This driver will enable your system to shut down using ACPI, and
349 dump your ACPI DSDT table using /proc/acpi/dsdt.
352 bool "Power Management Timer Support" if EMBEDDED
356 The Power Management Timer is available on all ACPI-capable,
357 in most cases even if ACPI is unusable or blacklisted.
359 This timing source is not affected by power management features
360 like aggressive processor idling, throttling, frequency and/or
361 voltage scaling, unlike the commonly used Time Stamp Counter
364 You should nearly always say Y here because many modern
365 systems require this timer.
367 config ACPI_CONTAINER
368 tristate "ACPI0004,PNP0A05 and PNP0A06 Container Driver (EXPERIMENTAL)"
369 depends on EXPERIMENTAL
370 default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU || ACPI_HOTPLUG_IO)
372 This allows _physical_ insertion and removal of CPUs and memory.
373 This can be useful, for example, on NUMA machines that support
374 ACPI based physical hotplug of nodes, or non-NUMA machines that
375 support physical cpu/memory hot-plug.
377 If one selects "m", this driver can be loaded with
378 "modprobe acpi_container".
380 config ACPI_HOTPLUG_MEMORY
381 tristate "Memory Hotplug"
382 depends on MEMORY_HOTPLUG
385 This driver adds supports for ACPI Memory Hotplug. This driver
386 provides support for fielding notifications on ACPI memory
387 devices (PNP0C80) which represent memory ranges that may be
388 onlined or offlined during runtime.
390 Enabling this driver assumes that your platform hardware
391 and firmware have support for hot-plugging physical memory. If
392 your system does not support physically adding or ripping out
393 memory DIMMs at some platform defined granularity (individually
394 or as a bank) at runtime, then you need not enable this driver.
396 If one selects "m," this driver can be loaded using the following
398 $>modprobe acpi_memhotplug
401 tristate "Smart Battery System"
404 This driver adds support for the Smart Battery System, another
405 type of access to battery information, found on some laptops.