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>
45 depends on SUSPEND || HIBERNATION
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54 they have been replaced by functions in /sys.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75 they have been replaced by functions in /sys.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 and removable
164 drive bays such as the IBM ultrabay or the Dell Module Bay.
166 config ACPI_PROCESSOR
171 This driver installs ACPI as the idle handler for Linux, and uses
172 ACPI C2 and C3 processor states to save power, on systems that
173 support it. It is required by several flavors of cpufreq
174 Performance-state drivers.
176 config ACPI_HOTPLUG_CPU
178 depends on ACPI_PROCESSOR && HOTPLUG_CPU
179 select ACPI_CONTAINER
183 tristate "Thermal Zone"
184 depends on ACPI_PROCESSOR
188 This driver adds support for ACPI thermal zones. Most mobile and
189 some desktop systems support ACPI thermal zones. It is HIGHLY
190 recommended that this option be enabled, as your processor(s)
191 may be damaged without it.
196 depends on (X86 || IA64)
197 default y if IA64_GENERIC || IA64_SGI_SN2
200 tristate "WMI (EXPERIMENTAL)"
202 depends on EXPERIMENTAL
204 This driver adds support for the ACPI-WMI (Windows Management
205 Instrumentation) mapper device (PNP0C14) found on some systems.
207 ACPI-WMI is a proprietary extension to ACPI to expose parts of the
208 ACPI firmware to userspace - this is done through various vendor
209 defined methods and data blocks in a PNP0C14 device, which are then
210 made available for userspace to call.
212 The implementation of this in Linux currently only exposes this to
213 other kernel space drivers.
215 This driver is a required dependency to build the firmware specific
216 drivers needed on many machines, including Acer and HP laptops.
218 It is safe to enable this driver even if your DSDT doesn't define
219 any ACPI-WMI devices.
222 tristate "ASUS/Medion Laptop Extras"
224 select BACKLIGHT_CLASS_DEVICE
226 This driver provides support for extra features of ACPI-compatible
227 ASUS laptops. As some of Medion laptops are made by ASUS, it may also
228 support some Medion laptops (such as 9675 for example). It makes all
229 the extra buttons generate standard ACPI events that go through
230 /proc/acpi/events, and (on some models) adds support for changing the
231 display brightness and output, switching the LCD backlight on and off,
232 and most importantly, allows you to blink those fancy LEDs intended
233 for reporting mail and wireless status.
235 Note: display switching code is currently considered EXPERIMENTAL,
236 toying with these values may even lock your machine.
238 All settings are changed via /proc/acpi/asus directory entries. Owner
239 and group for these entries can be set with asus_uid and asus_gid
242 More information and a userspace daemon for handling the extra buttons
243 at <http://sourceforge.net/projects/acpi4asus/>.
245 If you have an ACPI-compatible ASUS laptop, say Y or M here. This
246 driver is still under development, so if your laptop is unsupported or
247 something works not quite as expected, please use the mailing list
248 available on the above page (acpi4asus-user@lists.sourceforge.net).
250 NOTE: This driver is deprecated and will probably be removed soon,
251 use asus-laptop instead.
254 tristate "Toshiba Laptop Extras"
255 depends on X86 && INPUT
259 select BACKLIGHT_CLASS_DEVICE
261 This driver adds support for access to certain system settings
262 on "legacy free" Toshiba laptops. These laptops can be recognized by
263 their lack of a BIOS setup menu and APM support.
265 On these machines, all system configuration is handled through the
266 ACPI. This driver is required for access to controls not covered
267 by the general ACPI drivers, such as LCD brightness, video output,
270 This driver differs from the non-ACPI Toshiba laptop driver (located
271 under "Processor type and features") in several aspects.
272 Configuration is accessed by reading and writing text files in the
273 /proc tree instead of by program interface to /dev. Furthermore, no
274 power management functions are exposed, as those are handled by the
275 general ACPI drivers.
277 More information about this driver is available at
278 <http://memebeam.org/toys/ToshibaAcpiDriver>.
280 If you have a legacy free Toshiba laptop (such as the Libretto L1
283 config ACPI_CUSTOM_DSDT_FILE
284 string "Custom DSDT Table file to include"
286 depends on !STANDALONE
288 This option supports a custom DSDT by linking it into the kernel.
289 See Documentation/acpi/dsdt-override.txt
291 Enter the full path name to the file which includes the AmlCode
294 If unsure, don't enter a file name.
296 config ACPI_CUSTOM_DSDT
298 default ACPI_CUSTOM_DSDT_FILE != ""
300 config ACPI_BLACKLIST_YEAR
301 int "Disable ACPI for systems before Jan 1st this year" if X86_32
304 enter a 4-digit year, eg. 2001 to disable ACPI by default
305 on platforms with DMI BIOS date before January 1st that year.
306 "acpi=force" can be used to override this mechanism.
308 Enter 0 to disable this mechanism and allow ACPI to
309 run by default no matter what the year. (default)
312 bool "Debug Statements"
315 The ACPI driver can optionally report errors with a great deal
316 of verbosity. Saying Y enables these statements. This will increase
317 your kernel size by around 50K.
319 config ACPI_DEBUG_FUNC_TRACE
320 bool "Additionally enable ACPI function tracing"
322 depends on ACPI_DEBUG
324 ACPI Debug Statements slow down ACPI processing. Function trace
325 is about half of the penalty and is rarely useful.
331 This driver is required on some systems for the proper operation of
332 the battery and thermal drivers. If you are compiling for a
333 mobile system, say Y.
336 tristate "PCI slot detection driver"
339 This driver will attempt to discover all PCI slots in your system,
340 and creates entries in /sys/bus/pci/slots/. This feature can
341 help you correlate PCI bus addresses with the physical geography
342 of your slots. If you are unsure, say N.
352 This driver will enable your system to shut down using ACPI, and
353 dump your ACPI DSDT table using /proc/acpi/dsdt.
356 bool "Power Management Timer Support" if EMBEDDED
360 The Power Management Timer is available on all ACPI-capable,
361 in most cases even if ACPI is unusable or blacklisted.
363 This timing source is not affected by power management features
364 like aggressive processor idling, throttling, frequency and/or
365 voltage scaling, unlike the commonly used Time Stamp Counter
368 You should nearly always say Y here because many modern
369 systems require this timer.
371 config ACPI_CONTAINER
372 tristate "ACPI0004,PNP0A05 and PNP0A06 Container Driver (EXPERIMENTAL)"
373 depends on EXPERIMENTAL
374 default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU || ACPI_HOTPLUG_IO)
376 This allows _physical_ insertion and removal of CPUs and memory.
377 This can be useful, for example, on NUMA machines that support
378 ACPI based physical hotplug of nodes, or non-NUMA machines that
379 support physical cpu/memory hot-plug.
381 If one selects "m", this driver can be loaded with
382 "modprobe acpi_container".
384 config ACPI_HOTPLUG_MEMORY
385 tristate "Memory Hotplug"
386 depends on MEMORY_HOTPLUG
389 This driver adds supports for ACPI Memory Hotplug. This driver
390 provides support for fielding notifications on ACPI memory
391 devices (PNP0C80) which represent memory ranges that may be
392 onlined or offlined during runtime.
394 Enabling this driver assumes that your platform hardware
395 and firmware have support for hot-plugging physical memory. If
396 your system does not support physically adding or ripping out
397 memory DIMMs at some platform defined granularity (individually
398 or as a bank) at runtime, then you need not enable this driver.
400 If one selects "m," this driver can be loaded using the following
402 $>modprobe acpi_memhotplug
405 tristate "Smart Battery System"
408 This driver adds support for the Smart Battery System, another
409 type of access to battery information, found on some laptops.