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54 they have been replaced by functions in /sys.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76 they have been replaced by functions in /sys.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
200 tristate "Thermal Zone"
201 depends on ACPI_PROCESSOR
205 This driver supports ACPI thermal zones. Most mobile and
206 some desktop systems support ACPI thermal zones. It is HIGHLY
207 recommended that this option be enabled, as your processor(s)
208 may be damaged without it.
210 To compile this driver as a module, choose M here:
211 the module will be called thermal.
216 depends on (X86 || IA64)
217 default y if IA64_GENERIC || IA64_SGI_SN2
219 config ACPI_CUSTOM_DSDT_FILE
220 string "Custom DSDT Table file to include"
222 depends on !STANDALONE
224 This option supports a custom DSDT by linking it into the kernel.
225 See Documentation/acpi/dsdt-override.txt
227 Enter the full path name to the file which includes the AmlCode
230 If unsure, don't enter a file name.
232 config ACPI_CUSTOM_DSDT
234 default ACPI_CUSTOM_DSDT_FILE != ""
236 config ACPI_BLACKLIST_YEAR
237 int "Disable ACPI for systems before Jan 1st this year" if X86_32
240 Enter a 4-digit year, e.g., 2001, to disable ACPI by default
241 on platforms with DMI BIOS date before January 1st that year.
242 "acpi=force" can be used to override this mechanism.
244 Enter 0 to disable this mechanism and allow ACPI to
245 run by default no matter what the year. (default)
248 bool "Debug Statements"
251 The ACPI subsystem can produce debug output. Saying Y enables this
252 output and increases the kernel size by around 50K.
254 Use the acpi.debug_layer and acpi.debug_level kernel command-line
255 parameters documented in Documentation/acpi/debug.txt and
256 Documentation/kernel-parameters.txt to control the type and
257 amount of debug output.
259 config ACPI_DEBUG_FUNC_TRACE
260 bool "Additionally enable ACPI function tracing"
262 depends on ACPI_DEBUG
264 ACPI Debug Statements slow down ACPI processing. Function trace
265 is about half of the penalty and is rarely useful.
268 tristate "PCI slot detection driver"
272 This driver creates entries in /sys/bus/pci/slots/ for all PCI
273 slots in the system. This can help correlate PCI bus addresses,
274 i.e., segment/bus/device/function tuples, with physical slots in
275 the system. If you are unsure, say N.
277 To compile this driver as a module, choose M here:
278 the module will be called pci_slot.
281 bool "Power Management Timer Support" if EMBEDDED
285 The Power Management Timer is available on all ACPI-capable,
286 in most cases even if ACPI is unusable or blacklisted.
288 This timing source is not affected by power management features
289 like aggressive processor idling, throttling, frequency and/or
290 voltage scaling, unlike the commonly used Time Stamp Counter
293 You should nearly always say Y here because many modern
294 systems require this timer.
296 config ACPI_CONTAINER
297 tristate "Container and Module Devices (EXPERIMENTAL)"
298 depends on EXPERIMENTAL
299 default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU || ACPI_HOTPLUG_IO)
301 This driver supports ACPI Container and Module devices (IDs
302 ACPI0004, PNP0A05, and PNP0A06).
304 This helps support hotplug of nodes, CPUs, and memory.
306 To compile this driver as a module, choose M here:
307 the module will be called container.
309 config ACPI_HOTPLUG_MEMORY
310 tristate "Memory Hotplug"
311 depends on MEMORY_HOTPLUG
314 This driver supports ACPI memory hotplug. The driver
315 fields notifications on ACPI memory devices (PNP0C80),
316 which represent memory ranges that may be onlined or
317 offlined during runtime.
319 If your hardware and firmware do not support adding or
320 removing memory devices at runtime, you need not enable
323 To compile this driver as a module, choose M here:
324 the module will be called acpi_memhotplug.
327 tristate "Smart Battery System"
330 This driver supports the Smart Battery System, another
331 type of access to battery information, found on some laptops.
333 To compile this driver as a module, choose M here:
334 the modules will be called sbs and sbshc.