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54 they have been replaced by functions in /sys.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/*/power (/sys/devices/system/cpu/*/cpuidle/*)
58 /proc/acpi/processor/*/performance (/sys/devices/system/cpu/*/
60 /proc/acpi/processor/*/throttling (/sys/class/thermal/
62 This option has no effect on /proc/acpi/ files
63 and functions which do not yet exist in /sys.
65 Say N to delete /proc/acpi/ files that have moved to /sys/
67 config ACPI_PROCFS_POWER
68 bool "Deprecated power /proc/acpi directories"
72 For backwards compatibility, this option allows
73 deprecated power /proc/acpi/ directories to exist, even when
74 they have been replaced by functions in /sys.
75 The deprecated directories (and their replacements) include:
76 /proc/acpi/battery/* (/sys/class/power_supply/*)
77 /proc/acpi/ac_adapter/* (sys/class/power_supply/*)
78 This option has no effect on /proc/acpi/ directories
79 and functions, which do not yet exist in /sys
81 Say N to delete power /proc/acpi/ directories that have moved to /sys/
83 config ACPI_POWER_METER
84 tristate "ACPI 4.0 power meter"
87 This driver exposes ACPI 4.0 power meters as hardware monitoring
88 devices. Say Y (or M) if you have a computer with ACPI 4.0 firmware
91 To compile this driver as a module, choose M here:
92 the module will be called power-meter.
94 config ACPI_SYSFS_POWER
95 bool "Future power /sys interface"
99 Say N to disable power /sys interface
101 config ACPI_PROC_EVENT
102 bool "Deprecated /proc/acpi/event support"
106 A user-space daemon, acpid, typically reads /proc/acpi/event
107 and handles all ACPI-generated events.
109 These events are now delivered to user-space either
110 via the input layer or as netlink events.
112 This build option enables the old code for legacy
113 user-space implementation. After some time, this will
114 be moved under CONFIG_ACPI_PROCFS, and then deleted.
116 Say Y here to retain the old behaviour. Say N if your
117 user-space is newer than kernel 2.6.23 (September 2007).
120 tristate "AC Adapter"
124 This driver supports the AC Adapter object, which indicates
125 whether a system is on AC or not. If you have a system that can
126 switch between A/C and battery, say Y.
128 To compile this driver as a module, choose M here:
129 the module will be called ac.
136 This driver adds support for battery information through
137 /proc/acpi/battery. If you have a mobile system with a battery,
140 To compile this driver as a module, choose M here:
141 the module will be called battery.
148 This driver handles events on the power, sleep, and lid buttons.
149 A daemon reads /proc/acpi/event and perform user-defined actions
150 such as shutting down the system. This is necessary for
151 software-controlled poweroff.
153 To compile this driver as a module, choose M here:
154 the module will be called button.
158 depends on X86 && BACKLIGHT_CLASS_DEVICE && VIDEO_OUTPUT_CONTROL
162 This driver implements the ACPI Extensions For Display Adapters
163 for integrated graphics devices on motherboard, as specified in
164 ACPI 2.0 Specification, Appendix B. This supports basic operations
165 such as defining the video POST device, retrieving EDID information,
166 and setting up a video output.
168 To compile this driver as a module, choose M here:
169 the module will be called video.
176 This driver supports ACPI fan devices, allowing user-mode
177 applications to perform basic fan control (on, off, status).
179 To compile this driver as a module, choose M here:
180 the module will be called fan.
184 depends on EXPERIMENTAL
186 This driver supports ACPI-controlled docking stations and removable
187 drive bays such as the IBM Ultrabay and the Dell Module Bay.
189 config ACPI_PROCESSOR
194 This driver installs ACPI as the idle handler for Linux and uses
195 ACPI C2 and C3 processor states to save power on systems that
196 support it. It is required by several flavors of cpufreq
197 performance-state drivers.
199 To compile this driver as a module, choose M here:
200 the module will be called processor.
202 config ACPI_HOTPLUG_CPU
204 depends on ACPI_PROCESSOR && HOTPLUG_CPU
205 select ACPI_CONTAINER
208 config ACPI_PROCESSOR_AGGREGATOR
209 tristate "Processor Aggregator"
210 depends on ACPI_PROCESSOR
211 depends on EXPERIMENTAL
214 ACPI 4.0 defines processor Aggregator, which enables OS to perform
215 specific processor configuration and control that applies to all
216 processors in the platform. Currently only logical processor idling
217 is defined, which is to reduce power consumption. This driver
218 supports the new device.
221 tristate "Thermal Zone"
222 depends on ACPI_PROCESSOR
226 This driver supports ACPI thermal zones. Most mobile and
227 some desktop systems support ACPI thermal zones. It is HIGHLY
228 recommended that this option be enabled, as your processor(s)
229 may be damaged without it.
231 To compile this driver as a module, choose M here:
232 the module will be called thermal.
237 depends on (X86 || IA64)
238 default y if IA64_GENERIC || IA64_SGI_SN2
240 config ACPI_CUSTOM_DSDT_FILE
241 string "Custom DSDT Table file to include"
243 depends on !STANDALONE
245 This option supports a custom DSDT by linking it into the kernel.
246 See Documentation/acpi/dsdt-override.txt
248 Enter the full path name to the file which includes the AmlCode
251 If unsure, don't enter a file name.
253 config ACPI_CUSTOM_DSDT
255 default ACPI_CUSTOM_DSDT_FILE != ""
257 config ACPI_BLACKLIST_YEAR
258 int "Disable ACPI for systems before Jan 1st this year" if X86_32
261 Enter a 4-digit year, e.g., 2001, to disable ACPI by default
262 on platforms with DMI BIOS date before January 1st that year.
263 "acpi=force" can be used to override this mechanism.
265 Enter 0 to disable this mechanism and allow ACPI to
266 run by default no matter what the year. (default)
269 bool "Debug Statements"
272 The ACPI subsystem can produce debug output. Saying Y enables this
273 output and increases the kernel size by around 50K.
275 Use the acpi.debug_layer and acpi.debug_level kernel command-line
276 parameters documented in Documentation/acpi/debug.txt and
277 Documentation/kernel-parameters.txt to control the type and
278 amount of debug output.
280 config ACPI_DEBUG_FUNC_TRACE
281 bool "Additionally enable ACPI function tracing"
283 depends on ACPI_DEBUG
285 ACPI Debug Statements slow down ACPI processing. Function trace
286 is about half of the penalty and is rarely useful.
289 tristate "PCI slot detection driver"
293 This driver creates entries in /sys/bus/pci/slots/ for all PCI
294 slots in the system. This can help correlate PCI bus addresses,
295 i.e., segment/bus/device/function tuples, with physical slots in
296 the system. If you are unsure, say N.
298 To compile this driver as a module, choose M here:
299 the module will be called pci_slot.
302 bool "Power Management Timer Support" if EMBEDDED
306 The Power Management Timer is available on all ACPI-capable,
307 in most cases even if ACPI is unusable or blacklisted.
309 This timing source is not affected by power management features
310 like aggressive processor idling, throttling, frequency and/or
311 voltage scaling, unlike the commonly used Time Stamp Counter
314 You should nearly always say Y here because many modern
315 systems require this timer.
317 config ACPI_CONTAINER
318 tristate "Container and Module Devices (EXPERIMENTAL)"
319 depends on EXPERIMENTAL
320 default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU || ACPI_HOTPLUG_IO)
322 This driver supports ACPI Container and Module devices (IDs
323 ACPI0004, PNP0A05, and PNP0A06).
325 This helps support hotplug of nodes, CPUs, and memory.
327 To compile this driver as a module, choose M here:
328 the module will be called container.
330 config ACPI_HOTPLUG_MEMORY
331 tristate "Memory Hotplug"
332 depends on MEMORY_HOTPLUG
335 This driver supports ACPI memory hotplug. The driver
336 fields notifications on ACPI memory devices (PNP0C80),
337 which represent memory ranges that may be onlined or
338 offlined during runtime.
340 If your hardware and firmware do not support adding or
341 removing memory devices at runtime, you need not enable
344 To compile this driver as a module, choose M here:
345 the module will be called acpi_memhotplug.
348 tristate "Smart Battery System"
351 This driver supports the Smart Battery System, another
352 type of access to battery information, found on some laptops.
354 To compile this driver as a module, choose M here:
355 the modules will be called sbs and sbshc.
358 tristate "Hardware Error Device"
360 This driver supports the Hardware Error Device (PNP0C33),
361 which is used to report some hardware errors notified via
362 SCI, mainly the corrected errors.
364 source "drivers/acpi/apei/Kconfig"