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54 they have been replaced by functions in /sys.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80 they have been replaced by functions in /sys.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_SYSFS_POWER
90 bool "Future power /sys interface"
94 Say N to disable power /sys interface
96 config ACPI_PROC_EVENT
97 bool "Deprecated /proc/acpi/event support"
101 A user-space daemon, acpid, typically reads /proc/acpi/event
102 and handles all ACPI-generated events.
104 These events are now delivered to user-space either
105 via the input layer or as netlink events.
107 This build option enables the old code for legacy
108 user-space implementation. After some time, this will
109 be moved under CONFIG_ACPI_PROCFS, and then deleted.
111 Say Y here to retain the old behaviour. Say N if your
112 user-space is newer than kernel 2.6.23 (September 2007).
115 tristate "AC Adapter"
119 This driver supports the AC Adapter object, which indicates
120 whether a system is on AC or not. If you have a system that can
121 switch between A/C and battery, say Y.
123 To compile this driver as a module, choose M here:
124 the module will be called ac.
131 This driver adds support for battery information through
132 /proc/acpi/battery. If you have a mobile system with a battery,
135 To compile this driver as a module, choose M here:
136 the module will be called battery.
143 This driver handles events on the power, sleep, and lid buttons.
144 A daemon reads /proc/acpi/event and perform user-defined actions
145 such as shutting down the system. This is necessary for
146 software-controlled poweroff.
148 To compile this driver as a module, choose M here:
149 the module will be called button.
153 depends on X86 && BACKLIGHT_CLASS_DEVICE && VIDEO_OUTPUT_CONTROL
157 This driver implements the ACPI Extensions For Display Adapters
158 for integrated graphics devices on motherboard, as specified in
159 ACPI 2.0 Specification, Appendix B. This supports basic operations
160 such as defining the video POST device, retrieving EDID information,
161 and setting up a video output.
163 To compile this driver as a module, choose M here:
164 the module will be called video.
171 This driver supports ACPI fan devices, allowing user-mode
172 applications to perform basic fan control (on, off, status).
174 To compile this driver as a module, choose M here:
175 the module will be called fan.
179 depends on EXPERIMENTAL
181 This driver supports ACPI-controlled docking stations and removable
182 drive bays such as the IBM Ultrabay and the Dell Module Bay.
184 config ACPI_PROCESSOR
189 This driver installs ACPI as the idle handler for Linux and uses
190 ACPI C2 and C3 processor states to save power on systems that
191 support it. It is required by several flavors of cpufreq
192 performance-state drivers.
194 To compile this driver as a module, choose M here:
195 the module will be called processor.
197 config ACPI_HOTPLUG_CPU
199 depends on ACPI_PROCESSOR && HOTPLUG_CPU
200 select ACPI_CONTAINER
204 tristate "Thermal Zone"
205 depends on ACPI_PROCESSOR
209 This driver supports ACPI thermal zones. Most mobile and
210 some desktop systems support ACPI thermal zones. It is HIGHLY
211 recommended that this option be enabled, as your processor(s)
212 may be damaged without it.
214 To compile this driver as a module, choose M here:
215 the module will be called thermal.
220 depends on (X86 || IA64)
221 default y if IA64_GENERIC || IA64_SGI_SN2
223 config ACPI_CUSTOM_DSDT_FILE
224 string "Custom DSDT Table file to include"
226 depends on !STANDALONE
228 This option supports a custom DSDT by linking it into the kernel.
229 See Documentation/acpi/dsdt-override.txt
231 Enter the full path name to the file which includes the AmlCode
234 If unsure, don't enter a file name.
236 config ACPI_CUSTOM_DSDT
238 default ACPI_CUSTOM_DSDT_FILE != ""
240 config ACPI_BLACKLIST_YEAR
241 int "Disable ACPI for systems before Jan 1st this year" if X86_32
244 Enter a 4-digit year, e.g., 2001, to disable ACPI by default
245 on platforms with DMI BIOS date before January 1st that year.
246 "acpi=force" can be used to override this mechanism.
248 Enter 0 to disable this mechanism and allow ACPI to
249 run by default no matter what the year. (default)
252 bool "Debug Statements"
255 The ACPI subsystem can produce debug output. Saying Y enables this
256 output and increases the kernel size by around 50K.
258 Use the acpi.debug_layer and acpi.debug_level kernel command-line
259 parameters documented in Documentation/acpi/debug.txt and
260 Documentation/kernel-parameters.txt to control the type and
261 amount of debug output.
263 config ACPI_DEBUG_FUNC_TRACE
264 bool "Additionally enable ACPI function tracing"
266 depends on ACPI_DEBUG
268 ACPI Debug Statements slow down ACPI processing. Function trace
269 is about half of the penalty and is rarely useful.
272 tristate "PCI slot detection driver"
275 This driver creates entries in /sys/bus/pci/slots/ for all PCI
276 slots in the system. This can help correlate PCI bus addresses,
277 i.e., segment/bus/device/function tuples, with physical slots in
278 the system. If you are unsure, say N.
280 To compile this driver as a module, choose M here:
281 the module will be called pci_slot.
284 bool "Power Management Timer Support" if EMBEDDED
288 The Power Management Timer is available on all ACPI-capable,
289 in most cases even if ACPI is unusable or blacklisted.
291 This timing source is not affected by power management features
292 like aggressive processor idling, throttling, frequency and/or
293 voltage scaling, unlike the commonly used Time Stamp Counter
296 You should nearly always say Y here because many modern
297 systems require this timer.
299 config ACPI_CONTAINER
300 tristate "Container and Module Devices (EXPERIMENTAL)"
301 depends on EXPERIMENTAL
302 default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU || ACPI_HOTPLUG_IO)
304 This driver supports ACPI Container and Module devices (IDs
305 ACPI0004, PNP0A05, and PNP0A06).
307 This helps support hotplug of nodes, CPUs, and memory.
309 To compile this driver as a module, choose M here:
310 the module will be called container.
312 config ACPI_HOTPLUG_MEMORY
313 tristate "Memory Hotplug"
314 depends on MEMORY_HOTPLUG
317 This driver supports ACPI memory hotplug. The driver
318 fields notifications on ACPI memory devices (PNP0C80),
319 which represent memory ranges that may be onlined or
320 offlined during runtime.
322 If your hardware and firmware do not support adding or
323 removing memory devices at runtime, you need not enable
326 To compile this driver as a module, choose M here:
327 the module will be called acpi_memhotplug.
330 tristate "Smart Battery System"
333 This driver supports the Smart Battery System, another
334 type of access to battery information, found on some laptops.
336 To compile this driver as a module, choose M here:
337 the modules will be called sbs and sbshc.