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54 they have been replaced by functions in /sys.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80 they have been replaced by functions in /sys.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 An Embedded Controller typically is available on laptops and reads
114 sensor values like battery state and temperature.
115 The kernel access the EC through ACPI parsed code provided by BIOS
117 Thus this option is a debug option that helps to write ACPI drivers
118 and can be used to identify ACPI code or EC firmware bugs.
120 config ACPI_PROC_EVENT
121 bool "Deprecated /proc/acpi/event support"
125 A user-space daemon, acpid, typically reads /proc/acpi/event
126 and handles all ACPI-generated events.
128 These events are now delivered to user-space either
129 via the input layer or as netlink events.
131 This build option enables the old code for legacy
132 user-space implementation. After some time, this will
133 be moved under CONFIG_ACPI_PROCFS, and then deleted.
135 Say Y here to retain the old behaviour. Say N if your
136 user-space is newer than kernel 2.6.23 (September 2007).
139 tristate "AC Adapter"
143 This driver supports the AC Adapter object, which indicates
144 whether a system is on AC or not. If you have a system that can
145 switch between A/C and battery, say Y.
147 To compile this driver as a module, choose M here:
148 the module will be called ac.
155 This driver adds support for battery information through
156 /proc/acpi/battery. If you have a mobile system with a battery,
159 To compile this driver as a module, choose M here:
160 the module will be called battery.
167 This driver handles events on the power, sleep, and lid buttons.
168 A daemon reads /proc/acpi/event and perform user-defined actions
169 such as shutting down the system. This is necessary for
170 software-controlled poweroff.
172 To compile this driver as a module, choose M here:
173 the module will be called button.
177 depends on X86 && BACKLIGHT_CLASS_DEVICE && VIDEO_OUTPUT_CONTROL
181 This driver implements the ACPI Extensions For Display Adapters
182 for integrated graphics devices on motherboard, as specified in
183 ACPI 2.0 Specification, Appendix B. This supports basic operations
184 such as defining the video POST device, retrieving EDID information,
185 and setting up a video output.
187 To compile this driver as a module, choose M here:
188 the module will be called video.
195 This driver supports ACPI fan devices, allowing user-mode
196 applications to perform basic fan control (on, off, status).
198 To compile this driver as a module, choose M here:
199 the module will be called fan.
203 depends on EXPERIMENTAL
205 This driver supports ACPI-controlled docking stations and removable
206 drive bays such as the IBM Ultrabay and the Dell Module Bay.
208 config ACPI_PROCESSOR
213 This driver installs ACPI as the idle handler for Linux and uses
214 ACPI C2 and C3 processor states to save power on systems that
215 support it. It is required by several flavors of cpufreq
216 performance-state drivers.
218 To compile this driver as a module, choose M here:
219 the module will be called processor.
221 config ACPI_HOTPLUG_CPU
223 depends on ACPI_PROCESSOR && HOTPLUG_CPU
224 select ACPI_CONTAINER
227 config ACPI_PROCESSOR_AGGREGATOR
228 tristate "Processor Aggregator"
229 depends on ACPI_PROCESSOR
230 depends on EXPERIMENTAL
233 ACPI 4.0 defines processor Aggregator, which enables OS to perform
234 specific processor configuration and control that applies to all
235 processors in the platform. Currently only logical processor idling
236 is defined, which is to reduce power consumption. This driver
237 supports the new device.
240 tristate "Thermal Zone"
241 depends on ACPI_PROCESSOR
245 This driver supports ACPI thermal zones. Most mobile and
246 some desktop systems support ACPI thermal zones. It is HIGHLY
247 recommended that this option be enabled, as your processor(s)
248 may be damaged without it.
250 To compile this driver as a module, choose M here:
251 the module will be called thermal.
256 depends on (X86 || IA64)
257 default y if IA64_GENERIC || IA64_SGI_SN2
259 config ACPI_CUSTOM_DSDT_FILE
260 string "Custom DSDT Table file to include"
262 depends on !STANDALONE
264 This option supports a custom DSDT by linking it into the kernel.
265 See Documentation/acpi/dsdt-override.txt
267 Enter the full path name to the file which includes the AmlCode
270 If unsure, don't enter a file name.
272 config ACPI_CUSTOM_DSDT
274 default ACPI_CUSTOM_DSDT_FILE != ""
276 config ACPI_BLACKLIST_YEAR
277 int "Disable ACPI for systems before Jan 1st this year" if X86_32
280 Enter a 4-digit year, e.g., 2001, to disable ACPI by default
281 on platforms with DMI BIOS date before January 1st that year.
282 "acpi=force" can be used to override this mechanism.
284 Enter 0 to disable this mechanism and allow ACPI to
285 run by default no matter what the year. (default)
288 bool "Debug Statements"
291 The ACPI subsystem can produce debug output. Saying Y enables this
292 output and increases the kernel size by around 50K.
294 Use the acpi.debug_layer and acpi.debug_level kernel command-line
295 parameters documented in Documentation/acpi/debug.txt and
296 Documentation/kernel-parameters.txt to control the type and
297 amount of debug output.
299 config ACPI_DEBUG_FUNC_TRACE
300 bool "Additionally enable ACPI function tracing"
302 depends on ACPI_DEBUG
304 ACPI Debug Statements slow down ACPI processing. Function trace
305 is about half of the penalty and is rarely useful.
308 tristate "PCI slot detection driver"
312 This driver creates entries in /sys/bus/pci/slots/ for all PCI
313 slots in the system. This can help correlate PCI bus addresses,
314 i.e., segment/bus/device/function tuples, with physical slots in
315 the system. If you are unsure, say N.
317 To compile this driver as a module, choose M here:
318 the module will be called pci_slot.
321 bool "Power Management Timer Support" if EMBEDDED
325 The Power Management Timer is available on all ACPI-capable,
326 in most cases even if ACPI is unusable or blacklisted.
328 This timing source is not affected by power management features
329 like aggressive processor idling, throttling, frequency and/or
330 voltage scaling, unlike the commonly used Time Stamp Counter
333 You should nearly always say Y here because many modern
334 systems require this timer.
336 config ACPI_CONTAINER
337 tristate "Container and Module Devices (EXPERIMENTAL)"
338 depends on EXPERIMENTAL
339 default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU || ACPI_HOTPLUG_IO)
341 This driver supports ACPI Container and Module devices (IDs
342 ACPI0004, PNP0A05, and PNP0A06).
344 This helps support hotplug of nodes, CPUs, and memory.
346 To compile this driver as a module, choose M here:
347 the module will be called container.
349 config ACPI_HOTPLUG_MEMORY
350 tristate "Memory Hotplug"
351 depends on MEMORY_HOTPLUG
354 This driver supports ACPI memory hotplug. The driver
355 fields notifications on ACPI memory devices (PNP0C80),
356 which represent memory ranges that may be onlined or
357 offlined during runtime.
359 If your hardware and firmware do not support adding or
360 removing memory devices at runtime, you need not enable
363 To compile this driver as a module, choose M here:
364 the module will be called acpi_memhotplug.
367 tristate "Smart Battery System"
370 This driver supports the Smart Battery System, another
371 type of access to battery information, found on some laptops.
373 To compile this driver as a module, choose M here:
374 the modules will be called sbs and sbshc.
377 tristate "Hardware Error Device"
379 This driver supports the Hardware Error Device (PNP0C33),
380 which is used to report some hardware errors notified via
381 SCI, mainly the corrected errors.
383 source "drivers/acpi/apei/Kconfig"