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54 they have been replaced by functions in /sys.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/processor/*/throttling (/sys/class/thermal/
59 /proc/acpi/video/*/brightness (/sys/class/backlight/)
60 /proc/acpi/thermal_zone/*/* (/sys/class/thermal/)
61 This option has no effect on /proc/acpi/ files
62 and functions which do not yet exist in /sys.
64 Say N to delete /proc/acpi/ files that have moved to /sys/
66 config ACPI_PROCFS_POWER
67 bool "Deprecated power /proc/acpi directories"
71 For backwards compatibility, this option allows
72 deprecated power /proc/acpi/ directories to exist, even when
73 they have been replaced by functions in /sys.
74 The deprecated directories (and their replacements) include:
75 /proc/acpi/battery/* (/sys/class/power_supply/*)
76 /proc/acpi/ac_adapter/* (sys/class/power_supply/*)
77 This option has no effect on /proc/acpi/ directories
78 and functions, which do not yet exist in /sys
80 Say N to delete power /proc/acpi/ directories that have moved to /sys/
82 config ACPI_POWER_METER
83 tristate "ACPI 4.0 power meter"
86 This driver exposes ACPI 4.0 power meters as hardware monitoring
87 devices. Say Y (or M) if you have a computer with ACPI 4.0 firmware
90 To compile this driver as a module, choose M here:
91 the module will be called power-meter.
93 config ACPI_SYSFS_POWER
94 bool "Future power /sys interface"
98 Say N to disable power /sys interface
100 config ACPI_PROC_EVENT
101 bool "Deprecated /proc/acpi/event support"
105 A user-space daemon, acpid, typically reads /proc/acpi/event
106 and handles all ACPI-generated events.
108 These events are now delivered to user-space either
109 via the input layer or as netlink events.
111 This build option enables the old code for legacy
112 user-space implementation. After some time, this will
113 be moved under CONFIG_ACPI_PROCFS, and then deleted.
115 Say Y here to retain the old behaviour. Say N if your
116 user-space is newer than kernel 2.6.23 (September 2007).
119 tristate "AC Adapter"
123 This driver supports the AC Adapter object, which indicates
124 whether a system is on AC or not. If you have a system that can
125 switch between A/C and battery, say Y.
127 To compile this driver as a module, choose M here:
128 the module will be called ac.
135 This driver adds support for battery information through
136 /proc/acpi/battery. If you have a mobile system with a battery,
139 To compile this driver as a module, choose M here:
140 the module will be called battery.
147 This driver handles events on the power, sleep, and lid buttons.
148 A daemon reads /proc/acpi/event and perform user-defined actions
149 such as shutting down the system. This is necessary for
150 software-controlled poweroff.
152 To compile this driver as a module, choose M here:
153 the module will be called button.
157 depends on X86 && BACKLIGHT_CLASS_DEVICE && VIDEO_OUTPUT_CONTROL
161 This driver implements the ACPI Extensions For Display Adapters
162 for integrated graphics devices on motherboard, as specified in
163 ACPI 2.0 Specification, Appendix B. This supports basic operations
164 such as defining the video POST device, retrieving EDID information,
165 and setting up a video output.
167 To compile this driver as a module, choose M here:
168 the module will be called video.
175 This driver supports ACPI fan devices, allowing user-mode
176 applications to perform basic fan control (on, off, status).
178 To compile this driver as a module, choose M here:
179 the module will be called fan.
183 depends on EXPERIMENTAL
185 This driver supports ACPI-controlled docking stations and removable
186 drive bays such as the IBM Ultrabay and the Dell Module Bay.
188 config ACPI_PROCESSOR
193 This driver installs ACPI as the idle handler for Linux and uses
194 ACPI C2 and C3 processor states to save power on systems that
195 support it. It is required by several flavors of cpufreq
196 performance-state drivers.
198 To compile this driver as a module, choose M here:
199 the module will be called processor.
201 config ACPI_HOTPLUG_CPU
203 depends on ACPI_PROCESSOR && HOTPLUG_CPU
204 select ACPI_CONTAINER
207 config ACPI_PROCESSOR_AGGREGATOR
208 tristate "Processor Aggregator"
209 depends on ACPI_PROCESSOR
210 depends on EXPERIMENTAL
213 ACPI 4.0 defines processor Aggregator, which enables OS to perform
214 specific processor configuration and control that applies to all
215 processors in the platform. Currently only logical processor idling
216 is defined, which is to reduce power consumption. This driver
217 supports the new device.
220 tristate "Thermal Zone"
221 depends on ACPI_PROCESSOR
225 This driver supports ACPI thermal zones. Most mobile and
226 some desktop systems support ACPI thermal zones. It is HIGHLY
227 recommended that this option be enabled, as your processor(s)
228 may be damaged without it.
230 To compile this driver as a module, choose M here:
231 the module will be called thermal.
236 depends on (X86 || IA64)
237 default y if IA64_GENERIC || IA64_SGI_SN2
239 config ACPI_CUSTOM_DSDT_FILE
240 string "Custom DSDT Table file to include"
242 depends on !STANDALONE
244 This option supports a custom DSDT by linking it into the kernel.
245 See Documentation/acpi/dsdt-override.txt
247 Enter the full path name to the file which includes the AmlCode
250 If unsure, don't enter a file name.
252 config ACPI_CUSTOM_DSDT
254 default ACPI_CUSTOM_DSDT_FILE != ""
256 config ACPI_BLACKLIST_YEAR
257 int "Disable ACPI for systems before Jan 1st this year" if X86_32
260 Enter a 4-digit year, e.g., 2001, to disable ACPI by default
261 on platforms with DMI BIOS date before January 1st that year.
262 "acpi=force" can be used to override this mechanism.
264 Enter 0 to disable this mechanism and allow ACPI to
265 run by default no matter what the year. (default)
268 bool "Debug Statements"
271 The ACPI subsystem can produce debug output. Saying Y enables this
272 output and increases the kernel size by around 50K.
274 Use the acpi.debug_layer and acpi.debug_level kernel command-line
275 parameters documented in Documentation/acpi/debug.txt and
276 Documentation/kernel-parameters.txt to control the type and
277 amount of debug output.
279 config ACPI_DEBUG_FUNC_TRACE
280 bool "Additionally enable ACPI function tracing"
282 depends on ACPI_DEBUG
284 ACPI Debug Statements slow down ACPI processing. Function trace
285 is about half of the penalty and is rarely useful.
288 tristate "PCI slot detection driver"
292 This driver creates entries in /sys/bus/pci/slots/ for all PCI
293 slots in the system. This can help correlate PCI bus addresses,
294 i.e., segment/bus/device/function tuples, with physical slots in
295 the system. If you are unsure, say N.
297 To compile this driver as a module, choose M here:
298 the module will be called pci_slot.
301 bool "Power Management Timer Support" if EMBEDDED
305 The Power Management Timer is available on all ACPI-capable,
306 in most cases even if ACPI is unusable or blacklisted.
308 This timing source is not affected by power management features
309 like aggressive processor idling, throttling, frequency and/or
310 voltage scaling, unlike the commonly used Time Stamp Counter
313 You should nearly always say Y here because many modern
314 systems require this timer.
316 config ACPI_CONTAINER
317 tristate "Container and Module Devices (EXPERIMENTAL)"
318 depends on EXPERIMENTAL
319 default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU || ACPI_HOTPLUG_IO)
321 This driver supports ACPI Container and Module devices (IDs
322 ACPI0004, PNP0A05, and PNP0A06).
324 This helps support hotplug of nodes, CPUs, and memory.
326 To compile this driver as a module, choose M here:
327 the module will be called container.
329 config ACPI_HOTPLUG_MEMORY
330 tristate "Memory Hotplug"
331 depends on MEMORY_HOTPLUG
334 This driver supports ACPI memory hotplug. The driver
335 fields notifications on ACPI memory devices (PNP0C80),
336 which represent memory ranges that may be onlined or
337 offlined during runtime.
339 If your hardware and firmware do not support adding or
340 removing memory devices at runtime, you need not enable
343 To compile this driver as a module, choose M here:
344 the module will be called acpi_memhotplug.
347 tristate "Smart Battery System"
350 This driver supports the Smart Battery System, another
351 type of access to battery information, found on some laptops.
353 To compile this driver as a module, choose M here:
354 the modules will be called sbs and sbshc.
357 tristate "Hardware Error Device"
359 This driver supports the Hardware Error Device (PNP0C33),
360 which is used to report some hardware errors notified via
361 SCI, mainly the corrected errors.
363 source "drivers/acpi/apei/Kconfig"