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54 they have been replaced by functions in /sys.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80 they have been replaced by functions in /sys.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_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"
130 This driver supports the AC Adapter object, which indicates
131 whether a system is on AC or not. If you have a system that can
132 switch between A/C and battery, say Y.
134 To compile this driver as a module, choose M here:
135 the module will be called ac.
142 This driver adds support for battery information through
143 /proc/acpi/battery. If you have a mobile system with a battery,
146 To compile this driver as a module, choose M here:
147 the module will be called battery.
154 This driver handles events on the power, sleep, and lid buttons.
155 A daemon reads /proc/acpi/event and perform user-defined actions
156 such as shutting down the system. This is necessary for
157 software-controlled poweroff.
159 To compile this driver as a module, choose M here:
160 the module will be called button.
164 depends on X86 && BACKLIGHT_CLASS_DEVICE && VIDEO_OUTPUT_CONTROL
168 This driver implements the ACPI Extensions For Display Adapters
169 for integrated graphics devices on motherboard, as specified in
170 ACPI 2.0 Specification, Appendix B. This supports basic operations
171 such as defining the video POST device, retrieving EDID information,
172 and setting up a video output.
174 To compile this driver as a module, choose M here:
175 the module will be called video.
182 This driver supports ACPI fan devices, allowing user-mode
183 applications to perform basic fan control (on, off, status).
185 To compile this driver as a module, choose M here:
186 the module will be called fan.
190 depends on EXPERIMENTAL
192 This driver supports ACPI-controlled docking stations and removable
193 drive bays such as the IBM Ultrabay and the Dell Module Bay.
195 config ACPI_PROCESSOR
200 This driver installs ACPI as the idle handler for Linux and uses
201 ACPI C2 and C3 processor states to save power on systems that
202 support it. It is required by several flavors of cpufreq
203 performance-state drivers.
205 To compile this driver as a module, choose M here:
206 the module will be called processor.
208 config ACPI_HOTPLUG_CPU
210 depends on ACPI_PROCESSOR && HOTPLUG_CPU
211 select ACPI_CONTAINER
214 config ACPI_PROCESSOR_AGGREGATOR
215 tristate "Processor Aggregator"
216 depends on ACPI_PROCESSOR
217 depends on EXPERIMENTAL
220 ACPI 4.0 defines processor Aggregator, which enables OS to perform
221 specific processor configuration and control that applies to all
222 processors in the platform. Currently only logical processor idling
223 is defined, which is to reduce power consumption. This driver
224 supports the new device.
227 tristate "Thermal Zone"
228 depends on ACPI_PROCESSOR
232 This driver supports ACPI thermal zones. Most mobile and
233 some desktop systems support ACPI thermal zones. It is HIGHLY
234 recommended that this option be enabled, as your processor(s)
235 may be damaged without it.
237 To compile this driver as a module, choose M here:
238 the module will be called thermal.
243 depends on (X86 || IA64)
244 default y if IA64_GENERIC || IA64_SGI_SN2
246 config ACPI_CUSTOM_DSDT_FILE
247 string "Custom DSDT Table file to include"
249 depends on !STANDALONE
251 This option supports a custom DSDT by linking it into the kernel.
252 See Documentation/acpi/dsdt-override.txt
254 Enter the full path name to the file which includes the AmlCode
257 If unsure, don't enter a file name.
259 config ACPI_CUSTOM_DSDT
261 default ACPI_CUSTOM_DSDT_FILE != ""
263 config ACPI_BLACKLIST_YEAR
264 int "Disable ACPI for systems before Jan 1st this year" if X86_32
267 Enter a 4-digit year, e.g., 2001, to disable ACPI by default
268 on platforms with DMI BIOS date before January 1st that year.
269 "acpi=force" can be used to override this mechanism.
271 Enter 0 to disable this mechanism and allow ACPI to
272 run by default no matter what the year. (default)
275 bool "Debug Statements"
278 The ACPI subsystem can produce debug output. Saying Y enables this
279 output and increases the kernel size by around 50K.
281 Use the acpi.debug_layer and acpi.debug_level kernel command-line
282 parameters documented in Documentation/acpi/debug.txt and
283 Documentation/kernel-parameters.txt to control the type and
284 amount of debug output.
286 config ACPI_DEBUG_FUNC_TRACE
287 bool "Additionally enable ACPI function tracing"
289 depends on ACPI_DEBUG
291 ACPI Debug Statements slow down ACPI processing. Function trace
292 is about half of the penalty and is rarely useful.
295 tristate "PCI slot detection driver"
299 This driver creates entries in /sys/bus/pci/slots/ for all PCI
300 slots in the system. This can help correlate PCI bus addresses,
301 i.e., segment/bus/device/function tuples, with physical slots in
302 the system. If you are unsure, say N.
304 To compile this driver as a module, choose M here:
305 the module will be called pci_slot.
308 bool "Power Management Timer Support" if EMBEDDED
312 The Power Management Timer is available on all ACPI-capable,
313 in most cases even if ACPI is unusable or blacklisted.
315 This timing source is not affected by power management features
316 like aggressive processor idling, throttling, frequency and/or
317 voltage scaling, unlike the commonly used Time Stamp Counter
320 You should nearly always say Y here because many modern
321 systems require this timer.
323 config ACPI_CONTAINER
324 tristate "Container and Module Devices (EXPERIMENTAL)"
325 depends on EXPERIMENTAL
326 default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU || ACPI_HOTPLUG_IO)
328 This driver supports ACPI Container and Module devices (IDs
329 ACPI0004, PNP0A05, and PNP0A06).
331 This helps support hotplug of nodes, CPUs, and memory.
333 To compile this driver as a module, choose M here:
334 the module will be called container.
336 config ACPI_HOTPLUG_MEMORY
337 tristate "Memory Hotplug"
338 depends on MEMORY_HOTPLUG
341 This driver supports ACPI memory hotplug. The driver
342 fields notifications on ACPI memory devices (PNP0C80),
343 which represent memory ranges that may be onlined or
344 offlined during runtime.
346 If your hardware and firmware do not support adding or
347 removing memory devices at runtime, you need not enable
350 To compile this driver as a module, choose M here:
351 the module will be called acpi_memhotplug.
354 tristate "Smart Battery System"
357 This driver supports the Smart Battery System, another
358 type of access to battery information, found on some laptops.
360 To compile this driver as a module, choose M here:
361 the modules will be called sbs and sbshc.