6 bool "ACPI (Advanced Configuration and Power Interface) Support"
7 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, ACPI is used.
28 The project home page for the Linux ACPI subsystem is here:
29 <http://www.lesswatts.org/projects/acpi/>
31 Linux support for ACPI is based on Intel Corporation's ACPI
32 Component Architecture (ACPI CA). For more information on the
36 ACPI is an open industry specification co-developed by
37 Hewlett-Packard, Intel, Microsoft, Phoenix, and Toshiba.
38 The specification is available at:
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54 they have been replaced by functions in /sys.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/module/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)
63 /proc/acpi/processor/*/power (/sys/devices/system/cpu/*/cpuidle/*)
64 /proc/acpi/processor/*/performance (/sys/devices/system/cpu/*/
66 /proc/acpi/processor/*/throttling (/sys/class/thermal/
68 This option has no effect on /proc/acpi/ files
69 and functions which do not yet exist in /sys.
71 Say N to delete /proc/acpi/ files that have moved to /sys/
73 config ACPI_PROCFS_POWER
74 bool "Deprecated power /proc/acpi directories"
78 For backwards compatibility, this option allows
79 deprecated power /proc/acpi/ directories to exist, even when
80 they have been replaced by functions in /sys.
81 The deprecated directories (and their replacements) include:
82 /proc/acpi/battery/* (/sys/class/power_supply/*)
83 /proc/acpi/ac_adapter/* (sys/class/power_supply/*)
84 This option has no effect on /proc/acpi/ directories
85 and functions, which do not yet exist in /sys
87 Say N to delete power /proc/acpi/ directories that have moved to /sys/
89 config ACPI_POWER_METER
90 tristate "ACPI 4.0 power meter"
93 This driver exposes ACPI 4.0 power meters as hardware monitoring
94 devices. Say Y (or M) if you have a computer with ACPI 4.0 firmware
97 To compile this driver as a module, choose M here:
98 the module will be called power-meter.
100 config ACPI_SYSFS_POWER
101 bool "Future power /sys interface"
105 Say N to disable power /sys interface
107 config ACPI_EC_DEBUGFS
108 tristate "EC read/write access through /sys/kernel/debug/ec"
111 Say N to disable Embedded Controller /sys/kernel/debug interface
113 Be aware that using this interface can confuse your Embedded
114 Controller in a way that a normal reboot is not enough. You then
115 have to power of your system, and remove the laptop battery for
117 An Embedded Controller typically is available on laptops and reads
118 sensor values like battery state and temperature.
119 The kernel accesses the EC through ACPI parsed code provided by BIOS
120 tables. This option allows to access the EC directly without ACPI
122 Thus this option is a debug option that helps to write ACPI drivers
123 and can be used to identify ACPI code or EC firmware bugs.
125 config ACPI_PROC_EVENT
126 bool "Deprecated /proc/acpi/event support"
130 A user-space daemon, acpid, typically reads /proc/acpi/event
131 and handles all ACPI-generated events.
133 These events are now delivered to user-space either
134 via the input layer or as netlink events.
136 This build option enables the old code for legacy
137 user-space implementation. After some time, this will
138 be moved under CONFIG_ACPI_PROCFS, and then deleted.
140 Say Y here to retain the old behaviour. Say N if your
141 user-space is newer than kernel 2.6.23 (September 2007).
144 tristate "AC Adapter"
148 This driver supports the AC Adapter object, which indicates
149 whether a system is on AC or not. If you have a system that can
150 switch between A/C and battery, say Y.
152 To compile this driver as a module, choose M here:
153 the module will be called ac.
160 This driver adds support for battery information through
161 /proc/acpi/battery. If you have a mobile system with a battery,
164 To compile this driver as a module, choose M here:
165 the module will be called battery.
172 This driver handles events on the power, sleep, and lid buttons.
173 A daemon reads /proc/acpi/event and perform user-defined actions
174 such as shutting down the system. This is necessary for
175 software-controlled poweroff.
177 To compile this driver as a module, choose M here:
178 the module will be called button.
182 depends on X86 && BACKLIGHT_CLASS_DEVICE && VIDEO_OUTPUT_CONTROL
186 This driver implements the ACPI Extensions For Display Adapters
187 for integrated graphics devices on motherboard, as specified in
188 ACPI 2.0 Specification, Appendix B. This supports basic operations
189 such as defining the video POST device, retrieving EDID information,
190 and setting up a video output.
192 To compile this driver as a module, choose M here:
193 the module will be called video.
200 This driver supports ACPI fan devices, allowing user-mode
201 applications to perform basic fan control (on, off, status).
203 To compile this driver as a module, choose M here:
204 the module will be called fan.
208 depends on EXPERIMENTAL
210 This driver supports ACPI-controlled docking stations and removable
211 drive bays such as the IBM Ultrabay and the Dell Module Bay.
213 config ACPI_PROCESSOR
218 This driver installs ACPI as the idle handler for Linux and uses
219 ACPI C2 and C3 processor states to save power on systems that
220 support it. It is required by several flavors of cpufreq
221 performance-state drivers.
223 To compile this driver as a module, choose M here:
224 the module will be called processor.
226 config ACPI_HOTPLUG_CPU
228 depends on ACPI_PROCESSOR && HOTPLUG_CPU
229 select ACPI_CONTAINER
232 config ACPI_PROCESSOR_AGGREGATOR
233 tristate "Processor Aggregator"
234 depends on ACPI_PROCESSOR
235 depends on EXPERIMENTAL
238 ACPI 4.0 defines processor Aggregator, which enables OS to perform
239 specific processor configuration and control that applies to all
240 processors in the platform. Currently only logical processor idling
241 is defined, which is to reduce power consumption. This driver
242 supports the new device.
245 tristate "Thermal Zone"
246 depends on ACPI_PROCESSOR
250 This driver supports ACPI thermal zones. Most mobile and
251 some desktop systems support ACPI thermal zones. It is HIGHLY
252 recommended that this option be enabled, as your processor(s)
253 may be damaged without it.
255 To compile this driver as a module, choose M here:
256 the module will be called thermal.
261 depends on (X86 || IA64)
262 default y if IA64_GENERIC || IA64_SGI_SN2
264 config ACPI_CUSTOM_DSDT_FILE
265 string "Custom DSDT Table file to include"
267 depends on !STANDALONE
269 This option supports a custom DSDT by linking it into the kernel.
270 See Documentation/acpi/dsdt-override.txt
272 Enter the full path name to the file which includes the AmlCode
275 If unsure, don't enter a file name.
277 config ACPI_CUSTOM_DSDT
279 default ACPI_CUSTOM_DSDT_FILE != ""
281 config ACPI_BLACKLIST_YEAR
282 int "Disable ACPI for systems before Jan 1st this year" if X86_32
285 Enter a 4-digit year, e.g., 2001, to disable ACPI by default
286 on platforms with DMI BIOS date before January 1st that year.
287 "acpi=force" can be used to override this mechanism.
289 Enter 0 to disable this mechanism and allow ACPI to
290 run by default no matter what the year. (default)
293 bool "Debug Statements"
296 The ACPI subsystem can produce debug output. Saying Y enables this
297 output and increases the kernel size by around 50K.
299 Use the acpi.debug_layer and acpi.debug_level kernel command-line
300 parameters documented in Documentation/acpi/debug.txt and
301 Documentation/kernel-parameters.txt to control the type and
302 amount of debug output.
304 config ACPI_DEBUG_FUNC_TRACE
305 bool "Additionally enable ACPI function tracing"
307 depends on ACPI_DEBUG
309 ACPI Debug Statements slow down ACPI processing. Function trace
310 is about half of the penalty and is rarely useful.
313 tristate "PCI slot detection driver"
317 This driver creates entries in /sys/bus/pci/slots/ for all PCI
318 slots in the system. This can help correlate PCI bus addresses,
319 i.e., segment/bus/device/function tuples, with physical slots in
320 the system. If you are unsure, say N.
322 To compile this driver as a module, choose M here:
323 the module will be called pci_slot.
326 bool "Power Management Timer Support" if EMBEDDED
330 The Power Management Timer is available on all ACPI-capable,
331 in most cases even if ACPI is unusable or blacklisted.
333 This timing source is not affected by power management features
334 like aggressive processor idling, throttling, frequency and/or
335 voltage scaling, unlike the commonly used Time Stamp Counter
338 You should nearly always say Y here because many modern
339 systems require this timer.
341 config ACPI_CONTAINER
342 tristate "Container and Module Devices (EXPERIMENTAL)"
343 depends on EXPERIMENTAL
344 default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU || ACPI_HOTPLUG_IO)
346 This driver supports ACPI Container and Module devices (IDs
347 ACPI0004, PNP0A05, and PNP0A06).
349 This helps support hotplug of nodes, CPUs, and memory.
351 To compile this driver as a module, choose M here:
352 the module will be called container.
354 config ACPI_HOTPLUG_MEMORY
355 tristate "Memory Hotplug"
356 depends on MEMORY_HOTPLUG
359 This driver supports ACPI memory hotplug. The driver
360 fields notifications on ACPI memory devices (PNP0C80),
361 which represent memory ranges that may be onlined or
362 offlined during runtime.
364 If your hardware and firmware do not support adding or
365 removing memory devices at runtime, you need not enable
368 To compile this driver as a module, choose M here:
369 the module will be called acpi_memhotplug.
372 tristate "Smart Battery System"
375 This driver supports the Smart Battery System, another
376 type of access to battery information, found on some laptops.
378 To compile this driver as a module, choose M here:
379 the modules will be called sbs and sbshc.
382 tristate "Hardware Error Device"
384 This driver supports the Hardware Error Device (PNP0C33),
385 which is used to report some hardware errors notified via
386 SCI, mainly the corrected errors.
388 source "drivers/acpi/apei/Kconfig"