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, ACPI is used.
27 The project home page for the Linux ACPI subsystem is here:
28 <http://www.lesswatts.org/projects/acpi/>
30 Linux support for ACPI is based on Intel Corporation's ACPI
31 Component Architecture (ACPI CA). For more information on the
35 ACPI is an open industry specification co-developed by
36 Hewlett-Packard, Intel, Microsoft, Phoenix, and Toshiba.
37 The specification is available at:
38 <http://www.acpi.info>
44 depends on SUSPEND || HIBERNATION
48 bool "Deprecated /proc/acpi files"
51 For backwards compatibility, this option allows
52 deprecated /proc/acpi/ files to exist, even when
53 they have been replaced by functions in /sys.
54 The deprecated files (and their replacements) include:
56 This option has no effect on /proc/acpi/ files
57 and functions which do not yet exist in /sys.
59 Say N to delete /proc/acpi/ files that have moved to /sys/
61 config ACPI_PROCFS_POWER
62 bool "Deprecated power /proc/acpi directories"
65 For backwards compatibility, this option allows
66 deprecated power /proc/acpi/ directories to exist, even when
67 they have been replaced by functions in /sys.
68 The deprecated directories (and their replacements) include:
69 /proc/acpi/battery/* (/sys/class/power_supply/*)
70 /proc/acpi/ac_adapter/* (sys/class/power_supply/*)
71 This option has no effect on /proc/acpi/ directories
72 and functions, which do not yet exist in /sys
73 This option, together with the proc directories, will be
76 Say N to delete power /proc/acpi/ directories that have moved to /sys/
78 config ACPI_POWER_METER
79 tristate "ACPI 4.0 power meter"
82 This driver exposes ACPI 4.0 power meters as hardware monitoring
83 devices. Say Y (or M) if you have a computer with ACPI 4.0 firmware
86 To compile this driver as a module, choose M here:
87 the module will be called power-meter.
89 config ACPI_EC_DEBUGFS
90 tristate "EC read/write access through /sys/kernel/debug/ec"
93 Say N to disable Embedded Controller /sys/kernel/debug interface
95 Be aware that using this interface can confuse your Embedded
96 Controller in a way that a normal reboot is not enough. You then
97 have to power off your system, and remove the laptop battery for
99 An Embedded Controller typically is available on laptops and reads
100 sensor values like battery state and temperature.
101 The kernel accesses the EC through ACPI parsed code provided by BIOS
102 tables. This option allows to access the EC directly without ACPI
104 Thus this option is a debug option that helps to write ACPI drivers
105 and can be used to identify ACPI code or EC firmware bugs.
107 config ACPI_PROC_EVENT
108 bool "Deprecated /proc/acpi/event support"
112 A user-space daemon, acpid, typically reads /proc/acpi/event
113 and handles all ACPI-generated events.
115 These events are now delivered to user-space either
116 via the input layer or as netlink events.
118 This build option enables the old code for legacy
119 user-space implementation. After some time, this will
120 be moved under CONFIG_ACPI_PROCFS, and then deleted.
122 Say Y here to retain the old behaviour. Say N if your
123 user-space is newer than kernel 2.6.23 (September 2007).
126 tristate "AC Adapter"
131 This driver supports the AC Adapter object, which indicates
132 whether a system is on AC or not. If you have a system that can
133 switch between A/C and battery, say Y.
135 To compile this driver as a module, choose M here:
136 the module will be called ac.
144 This driver adds support for battery information through
145 /proc/acpi/battery. If you have a mobile system with a battery,
148 To compile this driver as a module, choose M here:
149 the module will be called battery.
156 This driver handles events on the power, sleep, and lid buttons.
157 A daemon reads /proc/acpi/event and perform user-defined actions
158 such as shutting down the system. This is necessary for
159 software-controlled poweroff.
161 To compile this driver as a module, choose M here:
162 the module will be called button.
166 depends on X86 && BACKLIGHT_CLASS_DEVICE && VIDEO_OUTPUT_CONTROL
170 This driver implements the ACPI Extensions For Display Adapters
171 for integrated graphics devices on motherboard, as specified in
172 ACPI 2.0 Specification, Appendix B. This supports basic operations
173 such as defining the video POST device, retrieving EDID information,
174 and setting up a video output.
176 To compile this driver as a module, choose M here:
177 the module will be called video.
184 This driver supports ACPI fan devices, allowing user-mode
185 applications to perform basic fan control (on, off, status).
187 To compile this driver as a module, choose M here:
188 the module will be called fan.
192 depends on EXPERIMENTAL
194 This driver supports ACPI-controlled docking stations and removable
195 drive bays such as the IBM Ultrabay and the Dell Module Bay.
197 config ACPI_PROCESSOR
203 This driver installs ACPI as the idle handler for Linux and uses
204 ACPI C2 and C3 processor states to save power on systems that
205 support it. It is required by several flavors of cpufreq
206 performance-state drivers.
208 To compile this driver as a module, choose M here:
209 the module will be called processor.
211 config ACPI_HOTPLUG_CPU
213 depends on ACPI_PROCESSOR && HOTPLUG_CPU
214 select ACPI_CONTAINER
217 config ACPI_PROCESSOR_AGGREGATOR
218 tristate "Processor Aggregator"
219 depends on ACPI_PROCESSOR
220 depends on EXPERIMENTAL
223 ACPI 4.0 defines processor Aggregator, which enables OS to perform
224 specific processor configuration and control that applies to all
225 processors in the platform. Currently only logical processor idling
226 is defined, which is to reduce power consumption. This driver
227 supports the new device.
230 tristate "Thermal Zone"
231 depends on ACPI_PROCESSOR
235 This driver supports ACPI thermal zones. Most mobile and
236 some desktop systems support ACPI thermal zones. It is HIGHLY
237 recommended that this option be enabled, as your processor(s)
238 may be damaged without it.
240 To compile this driver as a module, choose M here:
241 the module will be called thermal.
246 depends on (X86 || IA64)
247 default y if IA64_GENERIC || IA64_SGI_SN2
249 config ACPI_CUSTOM_DSDT_FILE
250 string "Custom DSDT Table file to include"
252 depends on !STANDALONE
254 This option supports a custom DSDT by linking it into the kernel.
255 See Documentation/acpi/dsdt-override.txt
257 Enter the full path name to the file which includes the AmlCode
260 If unsure, don't enter a file name.
262 config ACPI_CUSTOM_DSDT
264 default ACPI_CUSTOM_DSDT_FILE != ""
266 config ACPI_BLACKLIST_YEAR
267 int "Disable ACPI for systems before Jan 1st this year" if X86_32
270 Enter a 4-digit year, e.g., 2001, to disable ACPI by default
271 on platforms with DMI BIOS date before January 1st that year.
272 "acpi=force" can be used to override this mechanism.
274 Enter 0 to disable this mechanism and allow ACPI to
275 run by default no matter what the year. (default)
278 bool "Debug Statements"
281 The ACPI subsystem can produce debug output. Saying Y enables this
282 output and increases the kernel size by around 50K.
284 Use the acpi.debug_layer and acpi.debug_level kernel command-line
285 parameters documented in Documentation/acpi/debug.txt and
286 Documentation/kernel-parameters.txt to control the type and
287 amount of debug output.
289 config ACPI_DEBUG_FUNC_TRACE
290 bool "Additionally enable ACPI function tracing"
292 depends on ACPI_DEBUG
294 ACPI Debug Statements slow down ACPI processing. Function trace
295 is about half of the penalty and is rarely useful.
298 tristate "PCI slot detection driver"
302 This driver creates entries in /sys/bus/pci/slots/ for all PCI
303 slots in the system. This can help correlate PCI bus addresses,
304 i.e., segment/bus/device/function tuples, with physical slots in
305 the system. If you are unsure, say N.
307 To compile this driver as a module, choose M here:
308 the module will be called pci_slot.
311 bool "Power Management Timer Support" if EMBEDDED
315 The Power Management Timer is available on all ACPI-capable,
316 in most cases even if ACPI is unusable or blacklisted.
318 This timing source is not affected by power management features
319 like aggressive processor idling, throttling, frequency and/or
320 voltage scaling, unlike the commonly used Time Stamp Counter
323 You should nearly always say Y here because many modern
324 systems require this timer.
326 config ACPI_CONTAINER
327 tristate "Container and Module Devices (EXPERIMENTAL)"
328 depends on EXPERIMENTAL
329 default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU || ACPI_HOTPLUG_IO)
331 This driver supports ACPI Container and Module devices (IDs
332 ACPI0004, PNP0A05, and PNP0A06).
334 This helps support hotplug of nodes, CPUs, and memory.
336 To compile this driver as a module, choose M here:
337 the module will be called container.
339 config ACPI_HOTPLUG_MEMORY
340 tristate "Memory Hotplug"
341 depends on MEMORY_HOTPLUG
344 This driver supports ACPI memory hotplug. The driver
345 fields notifications on ACPI memory devices (PNP0C80),
346 which represent memory ranges that may be onlined or
347 offlined during runtime.
349 If your hardware and firmware do not support adding or
350 removing memory devices at runtime, you need not enable
353 To compile this driver as a module, choose M here:
354 the module will be called acpi_memhotplug.
357 tristate "Smart Battery System"
361 This driver supports the Smart Battery System, another
362 type of access to battery information, found on some laptops.
364 To compile this driver as a module, choose M here:
365 the modules will be called sbs and sbshc.
368 tristate "Hardware Error Device"
370 This driver supports the Hardware Error Device (PNP0C33),
371 which is used to report some hardware errors notified via
372 SCI, mainly the corrected errors.
374 source "drivers/acpi/apei/Kconfig"