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54 they have been replaced by functions in /sys.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)
64 This option has no effect on /proc/acpi/ files
65 and functions which do not yet exist in /sys.
67 Say N to delete /proc/acpi/ files that have moved to /sys/
69 config ACPI_PROCFS_POWER
70 bool "Deprecated power /proc/acpi directories"
74 For backwards compatibility, this option allows
75 deprecated power /proc/acpi/ directories to exist, even when
76 they have been replaced by functions in /sys.
77 The deprecated directories (and their replacements) include:
78 /proc/acpi/battery/* (/sys/class/power_supply/*)
79 /proc/acpi/ac_adapter/* (sys/class/power_supply/*)
80 This option has no effect on /proc/acpi/ directories
81 and functions, which do not yet exist in /sys
83 Say N to delete power /proc/acpi/ directories that have moved to /sys/
85 config ACPI_SYSFS_POWER
86 bool "Future power /sys interface"
90 Say N to disable power /sys interface
92 config ACPI_PROC_EVENT
93 bool "Deprecated /proc/acpi/event support"
97 A user-space daemon, acpid, typically reads /proc/acpi/event
98 and handles all ACPI-generated events.
100 These events are now delivered to user-space either
101 via the input layer or as netlink events.
103 This build option enables the old code for legacy
104 user-space implementation. After some time, this will
105 be moved under CONFIG_ACPI_PROCFS, and then deleted.
107 Say Y here to retain the old behaviour. Say N if your
108 user-space is newer than kernel 2.6.23 (September 2007).
111 tristate "AC Adapter"
115 This driver supports the AC Adapter object, which indicates
116 whether a system is on AC or not. If you have a system that can
117 switch between A/C and battery, say Y.
119 To compile this driver as a module, choose M here:
120 the module will be called ac.
127 This driver adds support for battery information through
128 /proc/acpi/battery. If you have a mobile system with a battery,
131 To compile this driver as a module, choose M here:
132 the module will be called battery.
139 This driver handles events on the power, sleep, and lid buttons.
140 A daemon reads /proc/acpi/event and perform user-defined actions
141 such as shutting down the system. This is necessary for
142 software-controlled poweroff.
144 To compile this driver as a module, choose M here:
145 the module will be called button.
149 depends on X86 && BACKLIGHT_CLASS_DEVICE && VIDEO_OUTPUT_CONTROL
153 This driver implements the ACPI Extensions For Display Adapters
154 for integrated graphics devices on motherboard, as specified in
155 ACPI 2.0 Specification, Appendix B. This supports basic operations
156 such as defining the video POST device, retrieving EDID information,
157 and setting up a video output.
159 To compile this driver as a module, choose M here:
160 the module will be called video.
167 This driver supports ACPI fan devices, allowing user-mode
168 applications to perform basic fan control (on, off, status).
170 To compile this driver as a module, choose M here:
171 the module will be called fan.
175 depends on EXPERIMENTAL
177 This driver supports ACPI-controlled docking stations and removable
178 drive bays such as the IBM Ultrabay and the Dell Module Bay.
180 config ACPI_PROCESSOR
185 This driver installs ACPI as the idle handler for Linux and uses
186 ACPI C2 and C3 processor states to save power on systems that
187 support it. It is required by several flavors of cpufreq
188 performance-state drivers.
190 To compile this driver as a module, choose M here:
191 the module will be called processor.
193 config ACPI_HOTPLUG_CPU
195 depends on ACPI_PROCESSOR && HOTPLUG_CPU
196 select ACPI_CONTAINER
199 config ACPI_PROCESSOR_AGGREGATOR
200 tristate "Processor Aggregator"
201 depends on ACPI_PROCESSOR
202 depends on EXPERIMENTAL
205 ACPI 4.0 defines processor Aggregator, which enables OS to perform
206 specfic processor configuration and control that applies to all
207 processors in the platform. Currently only logical processor idling
208 is defined, which is to reduce power consumption. This driver
209 support the new device.
212 tristate "Thermal Zone"
213 depends on ACPI_PROCESSOR
217 This driver supports ACPI thermal zones. Most mobile and
218 some desktop systems support ACPI thermal zones. It is HIGHLY
219 recommended that this option be enabled, as your processor(s)
220 may be damaged without it.
222 To compile this driver as a module, choose M here:
223 the module will be called thermal.
228 depends on (X86 || IA64)
229 default y if IA64_GENERIC || IA64_SGI_SN2
231 config ACPI_CUSTOM_DSDT_FILE
232 string "Custom DSDT Table file to include"
234 depends on !STANDALONE
236 This option supports a custom DSDT by linking it into the kernel.
237 See Documentation/acpi/dsdt-override.txt
239 Enter the full path name to the file which includes the AmlCode
242 If unsure, don't enter a file name.
244 config ACPI_CUSTOM_DSDT
246 default ACPI_CUSTOM_DSDT_FILE != ""
248 config ACPI_BLACKLIST_YEAR
249 int "Disable ACPI for systems before Jan 1st this year" if X86_32
252 Enter a 4-digit year, e.g., 2001, to disable ACPI by default
253 on platforms with DMI BIOS date before January 1st that year.
254 "acpi=force" can be used to override this mechanism.
256 Enter 0 to disable this mechanism and allow ACPI to
257 run by default no matter what the year. (default)
260 bool "Debug Statements"
263 The ACPI subsystem can produce debug output. Saying Y enables this
264 output and increases the kernel size by around 50K.
266 Use the acpi.debug_layer and acpi.debug_level kernel command-line
267 parameters documented in Documentation/acpi/debug.txt and
268 Documentation/kernel-parameters.txt to control the type and
269 amount of debug output.
271 config ACPI_DEBUG_FUNC_TRACE
272 bool "Additionally enable ACPI function tracing"
274 depends on ACPI_DEBUG
276 ACPI Debug Statements slow down ACPI processing. Function trace
277 is about half of the penalty and is rarely useful.
280 tristate "PCI slot detection driver"
284 This driver creates entries in /sys/bus/pci/slots/ for all PCI
285 slots in the system. This can help correlate PCI bus addresses,
286 i.e., segment/bus/device/function tuples, with physical slots in
287 the system. If you are unsure, say N.
289 To compile this driver as a module, choose M here:
290 the module will be called pci_slot.
293 bool "Power Management Timer Support" if EMBEDDED
297 The Power Management Timer is available on all ACPI-capable,
298 in most cases even if ACPI is unusable or blacklisted.
300 This timing source is not affected by power management features
301 like aggressive processor idling, throttling, frequency and/or
302 voltage scaling, unlike the commonly used Time Stamp Counter
305 You should nearly always say Y here because many modern
306 systems require this timer.
308 config ACPI_CONTAINER
309 tristate "Container and Module Devices (EXPERIMENTAL)"
310 depends on EXPERIMENTAL
311 default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU || ACPI_HOTPLUG_IO)
313 This driver supports ACPI Container and Module devices (IDs
314 ACPI0004, PNP0A05, and PNP0A06).
316 This helps support hotplug of nodes, CPUs, and memory.
318 To compile this driver as a module, choose M here:
319 the module will be called container.
321 config ACPI_HOTPLUG_MEMORY
322 tristate "Memory Hotplug"
323 depends on MEMORY_HOTPLUG
326 This driver supports ACPI memory hotplug. The driver
327 fields notifications on ACPI memory devices (PNP0C80),
328 which represent memory ranges that may be onlined or
329 offlined during runtime.
331 If your hardware and firmware do not support adding or
332 removing memory devices at runtime, you need not enable
335 To compile this driver as a module, choose M here:
336 the module will be called acpi_memhotplug.
339 tristate "Smart Battery System"
342 This driver supports the Smart Battery System, another
343 type of access to battery information, found on some laptops.
345 To compile this driver as a module, choose M here:
346 the modules will be called sbs and sbshc.