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, whichever is loaded first shall be used.
28 The ACPI SourceForge project contains the latest source code,
29 documentation, tools, mailing list subscription, and other
30 information. This project is available at:
31 <http://sourceforge.net/projects/acpi>
33 Linux support for ACPI is based on Intel Corporation's ACPI
34 Component Architecture (ACPI CA). For more information see:
35 <http://developer.intel.com/technology/iapc/acpi>
37 ACPI is an open industry specification co-developed by Compaq,
38 Intel, Microsoft, Phoenix, and Toshiba. The specification is
40 <http://www.acpi.info>
46 depends on SUSPEND || HIBERNATION
50 bool "Deprecated /proc/acpi files"
53 For backwards compatibility, this option allows
54 deprecated /proc/acpi/ files to exist, even when
55 they have been replaced by functions in /sys.
56 The deprecated files (and their replacements) include:
58 /proc/acpi/sleep (/sys/power/state)
59 /proc/acpi/info (/sys/modules/acpi/parameters/acpica_version)
60 /proc/acpi/dsdt (/sys/firmware/acpi/tables/DSDT)
61 /proc/acpi/fadt (/sys/firmware/acpi/tables/FACP)
62 /proc/acpi/debug_layer (/sys/module/acpi/parameters/debug_layer)
63 /proc/acpi/debug_level (/sys/module/acpi/parameters/debug_level)
65 This option has no effect on /proc/acpi/ files
66 and functions which do not yet exist in /sys.
68 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76 they have been replaced by functions in /sys.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, acpi, typically read /proc/acpi/event
98 and handled all ACPI sub-system generated events.
100 These events are now delivered to user-space via
101 either 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 adds support for 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.
124 This driver adds support for battery information through
125 /proc/acpi/battery. If you have a mobile system with a battery,
133 This driver handles events on the power, sleep and lid buttons.
134 A daemon reads /proc/acpi/event and perform user-defined actions
135 such as shutting down the system. This is necessary for
136 software controlled poweroff.
140 depends on X86 && BACKLIGHT_CLASS_DEVICE && VIDEO_OUTPUT_CONTROL
144 This driver implement the ACPI Extensions For Display Adapters
145 for integrated graphics devices on motherboard, as specified in
146 ACPI 2.0 Specification, Appendix B, allowing to perform some basic
147 control like defining the video POST device, retrieving EDID information
148 or to setup a video output, etc.
149 Note that this is an ref. implementation only. It may or may not work
150 for your integrated video device.
157 This driver adds support for ACPI fan devices, allowing user-mode
158 applications to perform basic fan control (on, off, status).
162 depends on EXPERIMENTAL
164 This driver adds support for ACPI controlled docking stations and removable
165 drive bays such as the IBM ultrabay or the Dell Module Bay.
167 config ACPI_PROCESSOR
172 This driver installs ACPI as the idle handler for Linux, and uses
173 ACPI C2 and C3 processor states to save power, on systems that
174 support it. It is required by several flavors of cpufreq
175 Performance-state drivers.
177 config ACPI_HOTPLUG_CPU
179 depends on ACPI_PROCESSOR && HOTPLUG_CPU
180 select ACPI_CONTAINER
184 tristate "Thermal Zone"
185 depends on ACPI_PROCESSOR
189 This driver adds support for ACPI thermal zones. Most mobile and
190 some desktop systems support ACPI thermal zones. It is HIGHLY
191 recommended that this option be enabled, as your processor(s)
192 may be damaged without it.
197 depends on (X86 || IA64)
198 default y if IA64_GENERIC || IA64_SGI_SN2
200 config ACPI_CUSTOM_DSDT_FILE
201 string "Custom DSDT Table file to include"
203 depends on !STANDALONE
205 This option supports a custom DSDT by linking it into the kernel.
206 See Documentation/acpi/dsdt-override.txt
208 Enter the full path name to the file which includes the AmlCode
211 If unsure, don't enter a file name.
213 config ACPI_CUSTOM_DSDT
215 default ACPI_CUSTOM_DSDT_FILE != ""
217 config ACPI_BLACKLIST_YEAR
218 int "Disable ACPI for systems before Jan 1st this year" if X86_32
221 enter a 4-digit year, eg. 2001 to disable ACPI by default
222 on platforms with DMI BIOS date before January 1st that year.
223 "acpi=force" can be used to override this mechanism.
225 Enter 0 to disable this mechanism and allow ACPI to
226 run by default no matter what the year. (default)
229 bool "Debug Statements"
232 The ACPI subsystem can produce debug output. Saying Y enables this
233 output and increases the kernel size by around 50K.
235 Use the acpi.debug_layer and acpi.debug_level kernel command-line
236 parameters documented in Documentation/acpi/debug.txt and
237 Documentation/kernel-parameters.txt to control the type and
238 amount of debug output.
240 config ACPI_DEBUG_FUNC_TRACE
241 bool "Additionally enable ACPI function tracing"
243 depends on ACPI_DEBUG
245 ACPI Debug Statements slow down ACPI processing. Function trace
246 is about half of the penalty and is rarely useful.
249 tristate "PCI slot detection driver"
252 This driver will attempt to discover all PCI slots in your system,
253 and creates entries in /sys/bus/pci/slots/. This feature can
254 help you correlate PCI bus addresses with the physical geography
255 of your slots. If you are unsure, say N.
258 bool "Power Management Timer Support" if EMBEDDED
262 The Power Management Timer is available on all ACPI-capable,
263 in most cases even if ACPI is unusable or blacklisted.
265 This timing source is not affected by power management features
266 like aggressive processor idling, throttling, frequency and/or
267 voltage scaling, unlike the commonly used Time Stamp Counter
270 You should nearly always say Y here because many modern
271 systems require this timer.
273 config ACPI_CONTAINER
274 tristate "ACPI0004,PNP0A05 and PNP0A06 Container Driver (EXPERIMENTAL)"
275 depends on EXPERIMENTAL
276 default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU || ACPI_HOTPLUG_IO)
278 This allows _physical_ insertion and removal of CPUs and memory.
279 This can be useful, for example, on NUMA machines that support
280 ACPI based physical hotplug of nodes, or non-NUMA machines that
281 support physical cpu/memory hot-plug.
283 If one selects "m", this driver can be loaded with
284 "modprobe container".
286 config ACPI_HOTPLUG_MEMORY
287 tristate "Memory Hotplug"
288 depends on MEMORY_HOTPLUG
291 This driver adds supports for ACPI Memory Hotplug. This driver
292 provides support for fielding notifications on ACPI memory
293 devices (PNP0C80) which represent memory ranges that may be
294 onlined or offlined during runtime.
296 Enabling this driver assumes that your platform hardware
297 and firmware have support for hot-plugging physical memory. If
298 your system does not support physically adding or ripping out
299 memory DIMMs at some platform defined granularity (individually
300 or as a bank) at runtime, then you need not enable this driver.
302 If one selects "m," this driver can be loaded using the following
304 $>modprobe acpi_memhotplug
307 tristate "Smart Battery System"
310 This driver adds support for the Smart Battery System, another
311 type of access to battery information, found on some laptops.