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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#
2# ACPI Configuration
3#
4
Jan Engelhardt3f2c48c2007-07-03 01:40:59 -04005menuconfig ACPI
Frans Pop355ee5e2007-10-29 17:20:38 -04006 bool "ACPI (Advanced Configuration and Power Interface) Support"
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 depends on !IA64_HP_SIM
8 depends on IA64 || X86
Adrian Bunk13001242006-03-28 17:04:00 -05009 depends on PCI
Len Brown243b66e2007-02-15 22:34:36 -050010 select PNP
Linus Torvalds1da177e2005-04-16 15:20:36 -070011 default y
Bjorn Helgaas1c48aa32009-02-19 14:45:47 -070012 help
Linus Torvalds1da177e2005-04-16 15:20:36 -070013 Advanced Configuration and Power Interface (ACPI) support for
Bjorn Helgaas1c48aa32009-02-19 14:45:47 -070014 Linux requires an ACPI-compliant platform (hardware/firmware),
Linus Torvalds1da177e2005-04-16 15:20:36 -070015 and assumes the presence of OS-directed configuration and power
16 management (OSPM) software. This option will enlarge your
17 kernel by about 70K.
18
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
Bjorn Helgaas1c48aa32009-02-19 14:45:47 -070024 are configured, ACPI is used.
Linus Torvalds1da177e2005-04-16 15:20:36 -070025
Bjorn Helgaas1c48aa32009-02-19 14:45:47 -070026 The project home page for the Linux ACPI subsystem is here:
27 <http://www.lesswatts.org/projects/acpi/>
Linus Torvalds1da177e2005-04-16 15:20:36 -070028
29 Linux support for ACPI is based on Intel Corporation's ACPI
Bjorn Helgaas1c48aa32009-02-19 14:45:47 -070030 Component Architecture (ACPI CA). For more information on the
31 ACPI CA, see:
32 <http://acpica.org/>
Linus Torvalds1da177e2005-04-16 15:20:36 -070033
Bjorn Helgaas1c48aa32009-02-19 14:45:47 -070034 ACPI is an open industry specification co-developed by
35 Hewlett-Packard, Intel, Microsoft, Phoenix, and Toshiba.
36 The specification is available at:
Linus Torvalds1da177e2005-04-16 15:20:36 -070037 <http://www.acpi.info>
38
Len Brown3e11c3c2005-05-27 04:53:27 -040039if ACPI
40
Len Brown673d5b42007-07-28 03:33:16 -040041config ACPI_SLEEP
42 bool
Rafael J. Wysocki5d1e0722008-10-22 14:58:43 -040043 depends on SUSPEND || HIBERNATION
Len Brown673d5b42007-07-28 03:33:16 -040044 default y
45
Zhang Ruib981c592007-01-29 11:02:30 +080046config ACPI_PROCFS
Len Brownfb804712007-07-24 01:50:46 -040047 bool "Deprecated /proc/acpi files"
48 depends on PROC_FS
Bjorn Helgaas1c48aa32009-02-19 14:45:47 -070049 help
Len Brownfb804712007-07-24 01:50:46 -040050 For backwards compatibility, this option allows
Rolf Eike Beer405bbe92007-10-20 03:10:57 +020051 deprecated /proc/acpi/ files to exist, even when
Len Brownfb804712007-07-24 01:50:46 -040052 they have been replaced by functions in /sys.
Len Brownfb804712007-07-24 01:50:46 -040053
Len Brownfb804712007-07-24 01:50:46 -040054 This option has no effect on /proc/acpi/ files
55 and functions which do not yet exist in /sys.
56
57 Say N to delete /proc/acpi/ files that have moved to /sys/
Bjorn Helgaas1c48aa32009-02-19 14:45:47 -070058
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +030059config ACPI_PROCFS_POWER
Alan Cox9e527972008-01-03 16:31:42 +000060 bool "Deprecated power /proc/acpi directories"
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +030061 depends on PROC_FS
Bjorn Helgaas1c48aa32009-02-19 14:45:47 -070062 help
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +030063 For backwards compatibility, this option allows
Alan Cox9e527972008-01-03 16:31:42 +000064 deprecated power /proc/acpi/ directories to exist, even when
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +030065 they have been replaced by functions in /sys.
Alan Cox9e527972008-01-03 16:31:42 +000066 The deprecated directories (and their replacements) include:
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +030067 /proc/acpi/battery/* (/sys/class/power_supply/*)
68 /proc/acpi/ac_adapter/* (sys/class/power_supply/*)
Alan Cox9e527972008-01-03 16:31:42 +000069 This option has no effect on /proc/acpi/ directories
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +030070 and functions, which do not yet exist in /sys
Zhang Rui6d855fc2011-01-10 11:16:30 +080071 This option, together with the proc directories, will be
72 deleted in 2.6.39.
Zhang Ruib981c592007-01-29 11:02:30 +080073
Alan Cox9e527972008-01-03 16:31:42 +000074 Say N to delete power /proc/acpi/ directories that have moved to /sys/
75
Thomas Renninger1195a092010-07-16 13:11:31 +020076config ACPI_EC_DEBUGFS
77 tristate "EC read/write access through /sys/kernel/debug/ec"
Thomas Renninger500de3dd2010-07-29 22:30:24 +020078 default n
Thomas Renninger1195a092010-07-16 13:11:31 +020079 help
80 Say N to disable Embedded Controller /sys/kernel/debug interface
81
Thomas Renninger500de3dd2010-07-29 22:30:24 +020082 Be aware that using this interface can confuse your Embedded
83 Controller in a way that a normal reboot is not enough. You then
Andrea Gelmini25cb1bf2010-08-18 15:22:10 +020084 have to power off your system, and remove the laptop battery for
Thomas Renninger500de3dd2010-07-29 22:30:24 +020085 some seconds.
Thomas Renninger1195a092010-07-16 13:11:31 +020086 An Embedded Controller typically is available on laptops and reads
87 sensor values like battery state and temperature.
Thomas Renninger500de3dd2010-07-29 22:30:24 +020088 The kernel accesses the EC through ACPI parsed code provided by BIOS
89 tables. This option allows to access the EC directly without ACPI
90 code being involved.
Thomas Renninger1195a092010-07-16 13:11:31 +020091 Thus this option is a debug option that helps to write ACPI drivers
92 and can be used to identify ACPI code or EC firmware bugs.
93
Len Brown14e04fb2007-08-23 15:20:26 -040094config ACPI_PROC_EVENT
95 bool "Deprecated /proc/acpi/event support"
96 depends on PROC_FS
Hugh Dickins721ebe02007-08-27 16:04:39 +010097 default y
Bjorn Helgaas1c48aa32009-02-19 14:45:47 -070098 help
99 A user-space daemon, acpid, typically reads /proc/acpi/event
100 and handles all ACPI-generated events.
Len Brown14e04fb2007-08-23 15:20:26 -0400101
Bjorn Helgaas1c48aa32009-02-19 14:45:47 -0700102 These events are now delivered to user-space either
103 via the input layer or as netlink events.
Len Brown14e04fb2007-08-23 15:20:26 -0400104
Hugh Dickins721ebe02007-08-27 16:04:39 +0100105 This build option enables the old code for legacy
Len Brown14e04fb2007-08-23 15:20:26 -0400106 user-space implementation. After some time, this will
107 be moved under CONFIG_ACPI_PROCFS, and then deleted.
108
Hugh Dickins721ebe02007-08-27 16:04:39 +0100109 Say Y here to retain the old behaviour. Say N if your
110 user-space is newer than kernel 2.6.23 (September 2007).
111
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112config ACPI_AC
113 tristate "AC Adapter"
Alexey Starikovskiy5527c8b2007-10-29 17:08:59 -0400114 depends on X86
Zhang Rui1b3d4c32010-10-08 13:54:57 +0800115 select POWER_SUPPLY
Len Brown07fefe42005-08-25 12:22:04 -0400116 default y
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117 help
Bjorn Helgaas1c48aa32009-02-19 14:45:47 -0700118 This driver supports the AC Adapter object, which indicates
119 whether a system is on AC or not. If you have a system that can
Len Brown07fefe42005-08-25 12:22:04 -0400120 switch between A/C and battery, say Y.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121
Bjorn Helgaas1c48aa32009-02-19 14:45:47 -0700122 To compile this driver as a module, choose M here:
123 the module will be called ac.
124
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125config ACPI_BATTERY
126 tristate "Battery"
Alexey Starikovskiy5527c8b2007-10-29 17:08:59 -0400127 depends on X86
Zhang Rui1b3d4c32010-10-08 13:54:57 +0800128 select POWER_SUPPLY
Len Brown07fefe42005-08-25 12:22:04 -0400129 default y
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130 help
131 This driver adds support for battery information through
132 /proc/acpi/battery. If you have a mobile system with a battery,
133 say Y.
134
Bjorn Helgaas1c48aa32009-02-19 14:45:47 -0700135 To compile this driver as a module, choose M here:
136 the module will be called battery.
137
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138config ACPI_BUTTON
139 tristate "Button"
Dmitry Torokhovc0968f02006-11-09 00:40:13 -0500140 depends on INPUT
Len Brown07fefe42005-08-25 12:22:04 -0400141 default y
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142 help
Bjorn Helgaas1c48aa32009-02-19 14:45:47 -0700143 This driver handles events on the power, sleep, and lid buttons.
Len Brown07fefe42005-08-25 12:22:04 -0400144 A daemon reads /proc/acpi/event and perform user-defined actions
145 such as shutting down the system. This is necessary for
Bjorn Helgaas1c48aa32009-02-19 14:45:47 -0700146 software-controlled poweroff.
147
148 To compile this driver as a module, choose M here:
149 the module will be called button.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150
151config ACPI_VIDEO
152 tristate "Video"
Luming Yu23b0f012007-05-09 21:07:05 +0800153 depends on X86 && BACKLIGHT_CLASS_DEVICE && VIDEO_OUTPUT_CONTROL
Andreas Herrmann03e2bf22007-09-17 23:41:05 +0200154 depends on INPUT
Zhang Rui63c4ec92008-04-21 16:07:13 +0800155 select THERMAL
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156 help
Bjorn Helgaas1c48aa32009-02-19 14:45:47 -0700157 This driver implements the ACPI Extensions For Display Adapters
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158 for integrated graphics devices on motherboard, as specified in
Bjorn Helgaas1c48aa32009-02-19 14:45:47 -0700159 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.
162
163 To compile this driver as a module, choose M here:
164 the module will be called video.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165
166config ACPI_FAN
167 tristate "Fan"
Zhang Rui63c4ec92008-04-21 16:07:13 +0800168 select THERMAL
Len Brown07fefe42005-08-25 12:22:04 -0400169 default y
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170 help
Bjorn Helgaas1c48aa32009-02-19 14:45:47 -0700171 This driver supports ACPI fan devices, allowing user-mode
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172 applications to perform basic fan control (on, off, status).
173
Bjorn Helgaas1c48aa32009-02-19 14:45:47 -0700174 To compile this driver as a module, choose M here:
175 the module will be called fan.
176
Len Brownc8f7a622006-07-09 17:22:28 -0400177config ACPI_DOCK
Shaohua Li898b0542008-09-27 11:10:28 +0800178 bool "Dock"
Len Brown8d7bff62006-07-09 22:09:57 -0400179 depends on EXPERIMENTAL
Len Brownc8f7a622006-07-09 17:22:28 -0400180 help
Bjorn Helgaas1c48aa32009-02-19 14:45:47 -0700181 This driver supports ACPI-controlled docking stations and removable
182 drive bays such as the IBM Ultrabay and the Dell Module Bay.
Kristen Carlson Accardi01b57e72006-10-20 14:30:25 -0700183
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184config ACPI_PROCESSOR
185 tristate "Processor"
Zhang Rui63c4ec92008-04-21 16:07:13 +0800186 select THERMAL
Jean Delvarea4084c12010-10-10 14:54:52 +0200187 select CPU_IDLE
Len Brown07fefe42005-08-25 12:22:04 -0400188 default y
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189 help
Bjorn Helgaas1c48aa32009-02-19 14:45:47 -0700190 This driver installs ACPI as the idle handler for Linux and uses
191 ACPI C2 and C3 processor states to save power on systems that
Len Brown07fefe42005-08-25 12:22:04 -0400192 support it. It is required by several flavors of cpufreq
Bjorn Helgaas1c48aa32009-02-19 14:45:47 -0700193 performance-state drivers.
194
195 To compile this driver as a module, choose M here:
196 the module will be called processor.
Zhao Yakuie92b2972010-12-08 10:10:18 +0800197config ACPI_IPMI
198 tristate "IPMI"
199 depends on EXPERIMENTAL && IPMI_SI && IPMI_HANDLER
200 default n
201 help
202 This driver enables the ACPI to access the BMC controller. And it
203 uses the IPMI request/response message to communicate with BMC
204 controller, which can be found on on the server.
205
206 To compile this driver as a module, choose M here:
207 the module will be called as acpi_ipmi.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208
209config ACPI_HOTPLUG_CPU
Adrian Bunkcbfc1ba2005-07-30 04:18:00 -0400210 bool
Fabio Estevam2f07a612012-01-05 10:47:58 -0200211 depends on EXPERIMENTAL && ACPI_PROCESSOR && HOTPLUG_CPU
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212 select ACPI_CONTAINER
Adrian Bunkcbfc1ba2005-07-30 04:18:00 -0400213 default y
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214
Shaohua Li8e0af512009-07-27 18:11:02 -0400215config ACPI_PROCESSOR_AGGREGATOR
216 tristate "Processor Aggregator"
217 depends on ACPI_PROCESSOR
218 depends on EXPERIMENTAL
Len Brownd91f79e2009-09-27 02:35:55 -0400219 depends on X86
Shaohua Li8e0af512009-07-27 18:11:02 -0400220 help
221 ACPI 4.0 defines processor Aggregator, which enables OS to perform
Jiri Slabyc4c4e2a2009-10-09 15:53:24 +0200222 specific processor configuration and control that applies to all
Shaohua Li8e0af512009-07-27 18:11:02 -0400223 processors in the platform. Currently only logical processor idling
224 is defined, which is to reduce power consumption. This driver
Jiri Slabyc4c4e2a2009-10-09 15:53:24 +0200225 supports the new device.
Shaohua Li8e0af512009-07-27 18:11:02 -0400226
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227config ACPI_THERMAL
228 tristate "Thermal Zone"
229 depends on ACPI_PROCESSOR
Zhang Rui3f655ef2008-01-17 15:51:11 +0800230 select THERMAL
Len Brown07fefe42005-08-25 12:22:04 -0400231 default y
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232 help
Bjorn Helgaas1c48aa32009-02-19 14:45:47 -0700233 This driver supports ACPI thermal zones. Most mobile and
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234 some desktop systems support ACPI thermal zones. It is HIGHLY
235 recommended that this option be enabled, as your processor(s)
236 may be damaged without it.
237
Bjorn Helgaas1c48aa32009-02-19 14:45:47 -0700238 To compile this driver as a module, choose M here:
239 the module will be called thermal.
240
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241config ACPI_NUMA
242 bool "NUMA support"
243 depends on NUMA
Yasunori Goto762834e2006-06-23 02:03:19 -0700244 depends on (X86 || IA64)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245 default y if IA64_GENERIC || IA64_SGI_SN2
246
Randy Dunlap7ce95732008-02-22 11:25:04 -0800247config ACPI_CUSTOM_DSDT_FILE
248 string "Custom DSDT Table file to include"
249 default ""
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250 depends on !STANDALONE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251 help
Len Brownd89e9d62008-02-06 19:28:02 -0500252 This option supports a custom DSDT by linking it into the kernel.
253 See Documentation/acpi/dsdt-override.txt
254
Uwe Zeisbergerc30fe7f2006-03-24 18:23:14 +0100255 Enter the full path name to the file which includes the AmlCode
256 declaration.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257
Randy Dunlap7ce95732008-02-22 11:25:04 -0800258 If unsure, don't enter a file name.
259
260config ACPI_CUSTOM_DSDT
261 bool
262 default ACPI_CUSTOM_DSDT_FILE != ""
263
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264config ACPI_BLACKLIST_YEAR
Andi Kleen2eb1bdb2006-02-26 04:18:43 +0100265 int "Disable ACPI for systems before Jan 1st this year" if X86_32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266 default 0
267 help
Bjorn Helgaas1c48aa32009-02-19 14:45:47 -0700268 Enter a 4-digit year, e.g., 2001, to disable ACPI by default
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269 on platforms with DMI BIOS date before January 1st that year.
270 "acpi=force" can be used to override this mechanism.
271
272 Enter 0 to disable this mechanism and allow ACPI to
273 run by default no matter what the year. (default)
274
275config ACPI_DEBUG
276 bool "Debug Statements"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277 default n
278 help
Bjorn Helgaasa0d84a92008-11-07 16:58:05 -0700279 The ACPI subsystem can produce debug output. Saying Y enables this
280 output and increases the kernel size by around 50K.
281
282 Use the acpi.debug_layer and acpi.debug_level kernel command-line
283 parameters documented in Documentation/acpi/debug.txt and
284 Documentation/kernel-parameters.txt to control the type and
285 amount of debug output.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286
Thomas Renninger798d91032007-05-31 17:20:39 +0200287config ACPI_DEBUG_FUNC_TRACE
288 bool "Additionally enable ACPI function tracing"
289 default n
290 depends on ACPI_DEBUG
291 help
292 ACPI Debug Statements slow down ACPI processing. Function trace
293 is about half of the penalty and is rarely useful.
294
Alex Chiang8344b562008-06-10 15:30:42 -0600295config ACPI_PCI_SLOT
296 tristate "PCI slot detection driver"
Alex Chiang268a03a2009-06-17 19:03:57 -0600297 depends on SYSFS
Alex Chiang8344b562008-06-10 15:30:42 -0600298 default n
299 help
Bjorn Helgaas1c48aa32009-02-19 14:45:47 -0700300 This driver creates entries in /sys/bus/pci/slots/ for all PCI
301 slots in the system. This can help correlate PCI bus addresses,
302 i.e., segment/bus/device/function tuples, with physical slots in
303 the system. If you are unsure, say N.
304
305 To compile this driver as a module, choose M here:
306 the module will be called pci_slot.
Alex Chiang8344b562008-06-10 15:30:42 -0600307
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308config X86_PM_TIMER
David Rientjes6a108a12011-01-20 14:44:16 -0800309 bool "Power Management Timer Support" if EXPERT
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310 depends on X86
Len Brown07fefe42005-08-25 12:22:04 -0400311 default y
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312 help
313 The Power Management Timer is available on all ACPI-capable,
314 in most cases even if ACPI is unusable or blacklisted.
315
Matt LaPlantec73a6682006-10-03 22:24:43 +0200316 This timing source is not affected by power management features
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317 like aggressive processor idling, throttling, frequency and/or
318 voltage scaling, unlike the commonly used Time Stamp Counter
319 (TSC) timing source.
320
Andi Kleene78256b2006-02-26 04:18:37 +0100321 You should nearly always say Y here because many modern
322 systems require this timer.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323
324config ACPI_CONTAINER
Bjorn Helgaas1c48aa32009-02-19 14:45:47 -0700325 tristate "Container and Module Devices (EXPERIMENTAL)"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326 depends on EXPERIMENTAL
327 default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU || ACPI_HOTPLUG_IO)
Bjorn Helgaas1c48aa32009-02-19 14:45:47 -0700328 help
329 This driver supports ACPI Container and Module devices (IDs
330 ACPI0004, PNP0A05, and PNP0A06).
Keiichiro Tokunaga45b1b192005-03-02 00:00:00 -0500331
Bjorn Helgaas1c48aa32009-02-19 14:45:47 -0700332 This helps support hotplug of nodes, CPUs, and memory.
333
334 To compile this driver as a module, choose M here:
335 the module will be called container.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336
337config ACPI_HOTPLUG_MEMORY
338 tristate "Memory Hotplug"
Yasunori Gotobc02af92006-06-27 02:53:30 -0700339 depends on MEMORY_HOTPLUG
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340 default n
341 help
Bjorn Helgaas1c48aa32009-02-19 14:45:47 -0700342 This driver supports ACPI memory hotplug. The driver
343 fields notifications on ACPI memory devices (PNP0C80),
344 which represent memory ranges that may be onlined or
345 offlined during runtime.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346
Bjorn Helgaas1c48aa32009-02-19 14:45:47 -0700347 If your hardware and firmware do not support adding or
348 removing memory devices at runtime, you need not enable
349 this driver.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350
Bjorn Helgaas1c48aa32009-02-19 14:45:47 -0700351 To compile this driver as a module, choose M here:
352 the module will be called acpi_memhotplug.
Rich Townsend3f86b832006-07-01 11:36:54 -0400353
354config ACPI_SBS
Alexey Starikovskiy94f6c082007-09-26 19:43:48 +0400355 tristate "Smart Battery System"
Vladimir Lebedevb4150fc2007-03-19 17:45:50 +0300356 depends on X86
Zhang Rui1b3d4c32010-10-08 13:54:57 +0800357 select POWER_SUPPLY
Rich Townsend3f86b832006-07-01 11:36:54 -0400358 help
Bjorn Helgaas1c48aa32009-02-19 14:45:47 -0700359 This driver supports the Smart Battery System, another
Alexey Starikovskiy94f6c082007-09-26 19:43:48 +0400360 type of access to battery information, found on some laptops.
Rich Townsend3f86b832006-07-01 11:36:54 -0400361
Bjorn Helgaas1c48aa32009-02-19 14:45:47 -0700362 To compile this driver as a module, choose M here:
363 the modules will be called sbs and sbshc.
364
Huang Ying801eab82010-05-18 14:35:17 +0800365config ACPI_HED
366 tristate "Hardware Error Device"
367 help
368 This driver supports the Hardware Error Device (PNP0C33),
369 which is used to report some hardware errors notified via
370 SCI, mainly the corrected errors.
371
Thomas Renninger526b4af2011-05-26 12:26:24 +0200372config ACPI_CUSTOM_METHOD
373 tristate "Allow ACPI methods to be inserted/replaced at run time"
374 depends on DEBUG_FS
375 default n
376 help
Justin P. Mattockbd1b2a52012-01-03 08:49:48 -0800377 This debug facility allows ACPI AML methods to be inserted and/or
Thomas Renninger526b4af2011-05-26 12:26:24 +0200378 replaced without rebooting the system. For details refer to:
379 Documentation/acpi/method-customizing.txt.
380
381 NOTE: This option is security sensitive, because it allows arbitrary
382 kernel memory to be written to by root (uid=0) users, allowing them
383 to bypass certain security measures (e.g. if root is not allowed to
384 load additional kernel modules after boot, this feature may be used
385 to override that restriction).
386
Matthew Garrettd1ff4b12012-01-31 13:19:20 -0500387config ACPI_BGRT
Josh Triplett2223af32012-09-28 17:57:05 -0700388 bool "Boottime Graphics Resource Table support"
389 depends on EFI
Matthew Garrettd1ff4b12012-01-31 13:19:20 -0500390 help
391 This driver adds support for exposing the ACPI Boottime Graphics
392 Resource Table, which allows the operating system to obtain
393 data from the firmware boot splash. It will appear under
394 /sys/firmware/acpi/bgrt/ .
395
Huang Yinga643ce22010-05-18 14:35:12 +0800396source "drivers/acpi/apei/Kconfig"
397
Linus Torvalds1da177e2005-04-16 15:20:36 -0700398endif # ACPI