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54 they have been replaced by functions in /sys.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80 they have been replaced by functions in /sys.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
215 tristate "Thermal Zone"
216 depends on ACPI_PROCESSOR
220 This driver supports ACPI thermal zones. Most mobile and
221 some desktop systems support ACPI thermal zones. It is HIGHLY
222 recommended that this option be enabled, as your processor(s)
223 may be damaged without it.
225 To compile this driver as a module, choose M here:
226 the module will be called thermal.
231 depends on (X86 || IA64)
232 default y if IA64_GENERIC || IA64_SGI_SN2
234 config ACPI_CUSTOM_DSDT_FILE
235 string "Custom DSDT Table file to include"
237 depends on !STANDALONE
239 This option supports a custom DSDT by linking it into the kernel.
240 See Documentation/acpi/dsdt-override.txt
242 Enter the full path name to the file which includes the AmlCode
245 If unsure, don't enter a file name.
247 config ACPI_CUSTOM_DSDT
249 default ACPI_CUSTOM_DSDT_FILE != ""
251 config ACPI_BLACKLIST_YEAR
252 int "Disable ACPI for systems before Jan 1st this year" if X86_32
255 Enter a 4-digit year, e.g., 2001, to disable ACPI by default
256 on platforms with DMI BIOS date before January 1st that year.
257 "acpi=force" can be used to override this mechanism.
259 Enter 0 to disable this mechanism and allow ACPI to
260 run by default no matter what the year. (default)
263 bool "Debug Statements"
266 The ACPI subsystem can produce debug output. Saying Y enables this
267 output and increases the kernel size by around 50K.
269 Use the acpi.debug_layer and acpi.debug_level kernel command-line
270 parameters documented in Documentation/acpi/debug.txt and
271 Documentation/kernel-parameters.txt to control the type and
272 amount of debug output.
274 config ACPI_DEBUG_FUNC_TRACE
275 bool "Additionally enable ACPI function tracing"
277 depends on ACPI_DEBUG
279 ACPI Debug Statements slow down ACPI processing. Function trace
280 is about half of the penalty and is rarely useful.
283 tristate "PCI slot detection driver"
287 This driver creates entries in /sys/bus/pci/slots/ for all PCI
288 slots in the system. This can help correlate PCI bus addresses,
289 i.e., segment/bus/device/function tuples, with physical slots in
290 the system. If you are unsure, say N.
292 To compile this driver as a module, choose M here:
293 the module will be called pci_slot.
296 bool "Power Management Timer Support" if EMBEDDED
300 The Power Management Timer is available on all ACPI-capable,
301 in most cases even if ACPI is unusable or blacklisted.
303 This timing source is not affected by power management features
304 like aggressive processor idling, throttling, frequency and/or
305 voltage scaling, unlike the commonly used Time Stamp Counter
308 You should nearly always say Y here because many modern
309 systems require this timer.
311 config ACPI_CONTAINER
312 tristate "Container and Module Devices (EXPERIMENTAL)"
313 depends on EXPERIMENTAL
314 default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU || ACPI_HOTPLUG_IO)
316 This driver supports ACPI Container and Module devices (IDs
317 ACPI0004, PNP0A05, and PNP0A06).
319 This helps support hotplug of nodes, CPUs, and memory.
321 To compile this driver as a module, choose M here:
322 the module will be called container.
324 config ACPI_HOTPLUG_MEMORY
325 tristate "Memory Hotplug"
326 depends on MEMORY_HOTPLUG
329 This driver supports ACPI memory hotplug. The driver
330 fields notifications on ACPI memory devices (PNP0C80),
331 which represent memory ranges that may be onlined or
332 offlined during runtime.
334 If your hardware and firmware do not support adding or
335 removing memory devices at runtime, you need not enable
338 To compile this driver as a module, choose M here:
339 the module will be called acpi_memhotplug.
342 tristate "Smart Battery System"
345 This driver supports the Smart Battery System, another
346 type of access to battery information, found on some laptops.
348 To compile this driver as a module, choose M here:
349 the modules will be called sbs and sbshc.