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54 they have been replaced by functions in /sys.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76 they have been replaced by functions in /sys.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
204 ACPI 4.0 defines processor Aggregator, which enables OS to perform
205 specfic processor configuration and control that applies to all
206 processors in the platform. Currently only logical processor idling
207 is defined, which is to reduce power consumption. This driver
208 support the new device.
211 tristate "Thermal Zone"
212 depends on ACPI_PROCESSOR
216 This driver supports ACPI thermal zones. Most mobile and
217 some desktop systems support ACPI thermal zones. It is HIGHLY
218 recommended that this option be enabled, as your processor(s)
219 may be damaged without it.
221 To compile this driver as a module, choose M here:
222 the module will be called thermal.
227 depends on (X86 || IA64)
228 default y if IA64_GENERIC || IA64_SGI_SN2
230 config ACPI_CUSTOM_DSDT_FILE
231 string "Custom DSDT Table file to include"
233 depends on !STANDALONE
235 This option supports a custom DSDT by linking it into the kernel.
236 See Documentation/acpi/dsdt-override.txt
238 Enter the full path name to the file which includes the AmlCode
241 If unsure, don't enter a file name.
243 config ACPI_CUSTOM_DSDT
245 default ACPI_CUSTOM_DSDT_FILE != ""
247 config ACPI_BLACKLIST_YEAR
248 int "Disable ACPI for systems before Jan 1st this year" if X86_32
251 Enter a 4-digit year, e.g., 2001, to disable ACPI by default
252 on platforms with DMI BIOS date before January 1st that year.
253 "acpi=force" can be used to override this mechanism.
255 Enter 0 to disable this mechanism and allow ACPI to
256 run by default no matter what the year. (default)
259 bool "Debug Statements"
262 The ACPI subsystem can produce debug output. Saying Y enables this
263 output and increases the kernel size by around 50K.
265 Use the acpi.debug_layer and acpi.debug_level kernel command-line
266 parameters documented in Documentation/acpi/debug.txt and
267 Documentation/kernel-parameters.txt to control the type and
268 amount of debug output.
270 config ACPI_DEBUG_FUNC_TRACE
271 bool "Additionally enable ACPI function tracing"
273 depends on ACPI_DEBUG
275 ACPI Debug Statements slow down ACPI processing. Function trace
276 is about half of the penalty and is rarely useful.
279 tristate "PCI slot detection driver"
283 This driver creates entries in /sys/bus/pci/slots/ for all PCI
284 slots in the system. This can help correlate PCI bus addresses,
285 i.e., segment/bus/device/function tuples, with physical slots in
286 the system. If you are unsure, say N.
288 To compile this driver as a module, choose M here:
289 the module will be called pci_slot.
292 bool "Power Management Timer Support" if EMBEDDED
296 The Power Management Timer is available on all ACPI-capable,
297 in most cases even if ACPI is unusable or blacklisted.
299 This timing source is not affected by power management features
300 like aggressive processor idling, throttling, frequency and/or
301 voltage scaling, unlike the commonly used Time Stamp Counter
304 You should nearly always say Y here because many modern
305 systems require this timer.
307 config ACPI_CONTAINER
308 tristate "Container and Module Devices (EXPERIMENTAL)"
309 depends on EXPERIMENTAL
310 default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU || ACPI_HOTPLUG_IO)
312 This driver supports ACPI Container and Module devices (IDs
313 ACPI0004, PNP0A05, and PNP0A06).
315 This helps support hotplug of nodes, CPUs, and memory.
317 To compile this driver as a module, choose M here:
318 the module will be called container.
320 config ACPI_HOTPLUG_MEMORY
321 tristate "Memory Hotplug"
322 depends on MEMORY_HOTPLUG
325 This driver supports ACPI memory hotplug. The driver
326 fields notifications on ACPI memory devices (PNP0C80),
327 which represent memory ranges that may be onlined or
328 offlined during runtime.
330 If your hardware and firmware do not support adding or
331 removing memory devices at runtime, you need not enable
334 To compile this driver as a module, choose M here:
335 the module will be called acpi_memhotplug.
338 tristate "Smart Battery System"
341 This driver supports the Smart Battery System, another
342 type of access to battery information, found on some laptops.
344 To compile this driver as a module, choose M here:
345 the modules will be called sbs and sbshc.