6 bool "ACPI (Advanced Configuration and Power Interface) Support"
7 depends on !IA64_HP_SIM
13 Advanced Configuration and Power Interface (ACPI) support for
14 Linux requires an ACPI-compliant platform (hardware/firmware),
15 and assumes the presence of OS-directed configuration and power
16 management (OSPM) software. This option will enlarge your
19 Linux ACPI provides a robust functional replacement for several
20 legacy configuration and power management interfaces, including
21 the Plug-and-Play BIOS specification (PnP BIOS), the
22 MultiProcessor Specification (MPS), and the Advanced Power
23 Management (APM) specification. If both ACPI and APM support
24 are configured, ACPI is used.
26 The project home page for the Linux ACPI subsystem is here:
27 <https://01.org/linux-acpi>
29 Linux support for ACPI is based on Intel Corporation's ACPI
30 Component Architecture (ACPI CA). For more information on the
34 ACPI is an open industry specification co-developed by
35 Hewlett-Packard, Intel, Microsoft, Phoenix, and Toshiba.
36 The specification is available at:
37 <http://www.acpi.info>
43 depends on SUSPEND || HIBERNATION
47 bool "Deprecated /proc/acpi files"
50 For backwards compatibility, this option allows
51 deprecated /proc/acpi/ files to exist, even when
52 they have been replaced by functions in /sys.
54 This option has no effect on /proc/acpi/ files
55 and functions which do not yet exist in /sys.
57 Say N to delete /proc/acpi/ files that have moved to /sys/
59 config ACPI_EC_DEBUGFS
60 tristate "EC read/write access through /sys/kernel/debug/ec"
63 Say N to disable Embedded Controller /sys/kernel/debug interface
65 Be aware that using this interface can confuse your Embedded
66 Controller in a way that a normal reboot is not enough. You then
67 have to power off your system, and remove the laptop battery for
69 An Embedded Controller typically is available on laptops and reads
70 sensor values like battery state and temperature.
71 The kernel accesses the EC through ACPI parsed code provided by BIOS
72 tables. This option allows to access the EC directly without ACPI
74 Thus this option is a debug option that helps to write ACPI drivers
75 and can be used to identify ACPI code or EC firmware bugs.
83 This driver supports the AC Adapter object, which indicates
84 whether a system is on AC or not. If you have a system that can
85 switch between A/C and battery, say Y.
87 To compile this driver as a module, choose M here:
88 the module will be called ac.
96 This driver adds support for battery information through
97 /proc/acpi/battery. If you have a mobile system with a battery,
100 To compile this driver as a module, choose M here:
101 the module will be called battery.
108 This driver handles events on the power, sleep, and lid buttons.
109 A daemon reads events from input devices or via netlink and
110 performs user-defined actions such as shutting down the system.
111 This is necessary for software-controlled poweroff.
113 To compile this driver as a module, choose M here:
114 the module will be called button.
118 depends on X86 && BACKLIGHT_CLASS_DEVICE && VIDEO_OUTPUT_CONTROL
122 This driver implements the ACPI Extensions For Display Adapters
123 for integrated graphics devices on motherboard, as specified in
124 ACPI 2.0 Specification, Appendix B. This supports basic operations
125 such as defining the video POST device, retrieving EDID information,
126 and setting up a video output.
128 To compile this driver as a module, choose M here:
129 the module will be called video.
136 This driver supports ACPI fan devices, allowing user-mode
137 applications to perform basic fan control (on, off, status).
139 To compile this driver as a module, choose M here:
140 the module will be called fan.
145 This driver supports ACPI-controlled docking stations and removable
146 drive bays such as the IBM Ultrabay and the Dell Module Bay.
148 config ACPI_PROCESSOR
154 This driver installs ACPI as the idle handler for Linux and uses
155 ACPI C2 and C3 processor states to save power on systems that
156 support it. It is required by several flavors of cpufreq
157 performance-state drivers.
159 To compile this driver as a module, choose M here:
160 the module will be called processor.
167 This driver enables the ACPI to access the BMC controller. And it
168 uses the IPMI request/response message to communicate with BMC
169 controller, which can be found on on the server.
171 To compile this driver as a module, choose M here:
172 the module will be called as acpi_ipmi.
174 config ACPI_HOTPLUG_CPU
176 depends on ACPI_PROCESSOR && HOTPLUG_CPU
177 select ACPI_CONTAINER
180 config ACPI_PROCESSOR_AGGREGATOR
181 tristate "Processor Aggregator"
182 depends on ACPI_PROCESSOR
185 ACPI 4.0 defines processor Aggregator, which enables OS to perform
186 specific processor configuration and control that applies to all
187 processors in the platform. Currently only logical processor idling
188 is defined, which is to reduce power consumption. This driver
189 supports the new device.
192 tristate "Thermal Zone"
193 depends on ACPI_PROCESSOR
197 This driver supports ACPI thermal zones. Most mobile and
198 some desktop systems support ACPI thermal zones. It is HIGHLY
199 recommended that this option be enabled, as your processor(s)
200 may be damaged without it.
202 To compile this driver as a module, choose M here:
203 the module will be called thermal.
208 depends on (X86 || IA64)
209 default y if IA64_GENERIC || IA64_SGI_SN2
211 config ACPI_CUSTOM_DSDT_FILE
212 string "Custom DSDT Table file to include"
214 depends on !STANDALONE
216 This option supports a custom DSDT by linking it into the kernel.
217 See Documentation/acpi/dsdt-override.txt
219 Enter the full path name to the file which includes the AmlCode
222 If unsure, don't enter a file name.
224 config ACPI_CUSTOM_DSDT
226 default ACPI_CUSTOM_DSDT_FILE != ""
228 config ACPI_INITRD_TABLE_OVERRIDE
229 bool "ACPI tables override via initrd"
230 depends on BLK_DEV_INITRD && X86
233 This option provides functionality to override arbitrary ACPI tables
234 via initrd. No functional change if no ACPI tables are passed via
235 initrd, therefore it's safe to say Y.
236 See Documentation/acpi/initrd_table_override.txt for details
238 config ACPI_BLACKLIST_YEAR
239 int "Disable ACPI for systems before Jan 1st this year" if X86_32
242 Enter a 4-digit year, e.g., 2001, to disable ACPI by default
243 on platforms with DMI BIOS date before January 1st that year.
244 "acpi=force" can be used to override this mechanism.
246 Enter 0 to disable this mechanism and allow ACPI to
247 run by default no matter what the year. (default)
250 bool "Debug Statements"
253 The ACPI subsystem can produce debug output. Saying Y enables this
254 output and increases the kernel size by around 50K.
256 Use the acpi.debug_layer and acpi.debug_level kernel command-line
257 parameters documented in Documentation/acpi/debug.txt and
258 Documentation/kernel-parameters.txt to control the type and
259 amount of debug output.
262 bool "PCI slot detection driver"
266 This driver creates entries in /sys/bus/pci/slots/ for all PCI
267 slots in the system. This can help correlate PCI bus addresses,
268 i.e., segment/bus/device/function tuples, with physical slots in
269 the system. If you are unsure, say N.
272 bool "Power Management Timer Support" if EXPERT
276 The Power Management Timer is available on all ACPI-capable,
277 in most cases even if ACPI is unusable or blacklisted.
279 This timing source is not affected by power management features
280 like aggressive processor idling, throttling, frequency and/or
281 voltage scaling, unlike the commonly used Time Stamp Counter
284 You should nearly always say Y here because many modern
285 systems require this timer.
287 config ACPI_CONTAINER
288 bool "Container and Module Devices"
289 default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU)
291 This driver supports ACPI Container and Module devices (IDs
292 ACPI0004, PNP0A05, and PNP0A06).
294 This helps support hotplug of nodes, CPUs, and memory.
296 To compile this driver as a module, choose M here:
297 the module will be called container.
299 config ACPI_HOTPLUG_MEMORY
300 bool "Memory Hotplug"
301 depends on MEMORY_HOTPLUG
303 This driver supports ACPI memory hotplug. The driver
304 fields notifications on ACPI memory devices (PNP0C80),
305 which represent memory ranges that may be onlined or
306 offlined during runtime.
308 If your hardware and firmware do not support adding or
309 removing memory devices at runtime, you need not enable
312 To compile this driver as a module, choose M here:
313 the module will be called acpi_memhotplug.
316 tristate "Smart Battery System"
320 This driver supports the Smart Battery System, another
321 type of access to battery information, found on some laptops.
323 To compile this driver as a module, choose M here:
324 the modules will be called sbs and sbshc.
327 tristate "Hardware Error Device"
329 This driver supports the Hardware Error Device (PNP0C33),
330 which is used to report some hardware errors notified via
331 SCI, mainly the corrected errors.
333 config ACPI_CUSTOM_METHOD
334 tristate "Allow ACPI methods to be inserted/replaced at run time"
338 This debug facility allows ACPI AML methods to be inserted and/or
339 replaced without rebooting the system. For details refer to:
340 Documentation/acpi/method-customizing.txt.
342 NOTE: This option is security sensitive, because it allows arbitrary
343 kernel memory to be written to by root (uid=0) users, allowing them
344 to bypass certain security measures (e.g. if root is not allowed to
345 load additional kernel modules after boot, this feature may be used
346 to override that restriction).
349 bool "Boottime Graphics Resource Table support"
350 depends on EFI && X86
352 This driver adds support for exposing the ACPI Boottime Graphics
353 Resource Table, which allows the operating system to obtain
354 data from the firmware boot splash. It will appear under
355 /sys/firmware/acpi/bgrt/ .
357 source "drivers/acpi/apei/Kconfig"