drivers/acpi/Kconfig

   1 #
   2 # ACPI Configuration
   3 #
   4
   5 menuconfig ACPI
   6         bool "ACPI (Advanced Configuration and Power Interface) Support"
   7         depends on !IA64_HP_SIM
   8         depends on IA64 || X86
   9         depends on PCI
  10         select PNP
  11         default y
  12         help
  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
  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
  24           are configured, ACPI is used.
  25
  26           The project home page for the Linux ACPI subsystem is here:
  27           <http://www.lesswatts.org/projects/acpi/>
  28
  29           Linux support for ACPI is based on Intel Corporation's ACPI
  30           Component Architecture (ACPI CA).  For more information on the
  31           ACPI CA, see:
  32           <http://acpica.org/>
  33
  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>
  38
  39 if ACPI
  40
  41 config ACPI_SLEEP
  42         bool
  43         depends on SUSPEND || HIBERNATION
  44         default y
  45
  46 config ACPI_PROCFS
  47         bool "Deprecated /proc/acpi files"
  48         depends on PROC_FS
  49         help
  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  52           they have been replaced by functions in /sys.
  53
  54           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/
  58
  59 config ACPI_PROCFS_POWER
  60         bool "Deprecated power /proc/acpi directories"
  61         depends on PROC_FS
  62         help
  63           For backwards compatibility, this option allows
  64           deprecated power /proc/acpi/ directories to exist, even when
  65           they have been replaced by functions in /sys.
  66           The deprecated directories (and their replacements) include:
  67           /proc/acpi/battery/* (/sys/class/power_supply/*)
  68           /proc/acpi/ac_adapter/* (sys/class/power_supply/*)
  69           This option has no effect on /proc/acpi/ directories
  70           and functions, which do not yet exist in /sys
  71           This option, together with the proc directories, will be
  72           deleted in 2.6.39.
  73
  74           Say N to delete power /proc/acpi/ directories that have moved to /sys/
  75
  76 config ACPI_EC_DEBUGFS
  77         tristate "EC read/write access through /sys/kernel/debug/ec"
  78         default n
  79         help
  80           Say N to disable Embedded Controller /sys/kernel/debug interface
  81
  82           Be aware that using this interface can confuse your Embedded
  83           Controller in a way that a normal reboot is not enough. You then
  84           have to power off your system, and remove the laptop battery for
  85           some seconds.
  86           An Embedded Controller typically is available on laptops and reads
  87           sensor values like battery state and temperature.
  88           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.
  91           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
  94 config ACPI_PROC_EVENT
  95         bool "Deprecated /proc/acpi/event support"
  96         depends on PROC_FS
  97         default y
  98         help
  99           A user-space daemon, acpid, typically reads /proc/acpi/event
 100           and handles all ACPI-generated events.
 101
 102           These events are now delivered to user-space either
 103           via the input layer or as netlink events.
 104
 105           This build option enables the old code for legacy
 106           user-space implementation.  After some time, this will
 107           be moved under CONFIG_ACPI_PROCFS, and then deleted.
 108
 109           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
 112 config ACPI_AC
 113         tristate "AC Adapter"
 114         depends on X86
 115         select POWER_SUPPLY
 116         default y
 117         help
 118           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
 120           switch between A/C and battery, say Y.
 121
 122           To compile this driver as a module, choose M here:
 123           the module will be called ac.
 124
 125 config ACPI_BATTERY
 126         tristate "Battery"
 127         depends on X86
 128         select POWER_SUPPLY
 129         default y
 130         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
 135           To compile this driver as a module, choose M here:
 136           the module will be called battery.
 137
 138 config ACPI_BUTTON
 139         tristate "Button"
 140         depends on INPUT
 141         default y
 142         help
 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.
 147
 148           To compile this driver as a module, choose M here:
 149           the module will be called button.
 150
 151 config ACPI_VIDEO
 152         tristate "Video"
 153         depends on X86 && BACKLIGHT_CLASS_DEVICE && VIDEO_OUTPUT_CONTROL
 154         depends on INPUT
 155         select THERMAL
 156         help
 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.
 162
 163           To compile this driver as a module, choose M here:
 164           the module will be called video.
 165
 166 config ACPI_FAN
 167         tristate "Fan"
 168         select THERMAL
 169         default y
 170         help
 171           This driver supports ACPI fan devices, allowing user-mode
 172           applications to perform basic fan control (on, off, status).
 173
 174           To compile this driver as a module, choose M here:
 175           the module will be called fan.
 176
 177 config ACPI_DOCK
 178         bool "Dock"
 179         depends on EXPERIMENTAL
 180         help
 181           This driver supports ACPI-controlled docking stations and removable
 182           drive bays such as the IBM Ultrabay and the Dell Module Bay.
 183
 184 config ACPI_PROCESSOR
 185         tristate "Processor"
 186         select THERMAL
 187         select CPU_IDLE
 188         default y
 189         help
 190           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
 192           support it.  It is required by several flavors of cpufreq
 193           performance-state drivers.
 194
 195           To compile this driver as a module, choose M here:
 196           the module will be called processor.
 197 config 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.
 208
 209 config ACPI_HOTPLUG_CPU
 210         bool
 211         depends on EXPERIMENTAL && ACPI_PROCESSOR && HOTPLUG_CPU
 212         select ACPI_CONTAINER
 213         default y
 214
 215 config ACPI_PROCESSOR_AGGREGATOR
 216         tristate "Processor Aggregator"
 217         depends on ACPI_PROCESSOR
 218         depends on EXPERIMENTAL
 219         depends on X86
 220         help
 221           ACPI 4.0 defines processor Aggregator, which enables OS to perform
 222           specific processor configuration and control that applies to all
 223           processors in the platform. Currently only logical processor idling
 224           is defined, which is to reduce power consumption. This driver
 225           supports the new device.
 226
 227 config ACPI_THERMAL
 228         tristate "Thermal Zone"
 229         depends on ACPI_PROCESSOR
 230         select THERMAL
 231         default y
 232         help
 233           This driver supports ACPI thermal zones.  Most mobile and
 234           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
 238           To compile this driver as a module, choose M here:
 239           the module will be called thermal.
 240
 241 config ACPI_NUMA
 242         bool "NUMA support"
 243         depends on NUMA
 244         depends on (X86 || IA64)
 245         default y if IA64_GENERIC || IA64_SGI_SN2
 246
 247 config ACPI_CUSTOM_DSDT_FILE
 248         string "Custom DSDT Table file to include"
 249         default ""
 250         depends on !STANDALONE
 251         help
 252           This option supports a custom DSDT by linking it into the kernel.
 253           See Documentation/acpi/dsdt-override.txt
 254
 255           Enter the full path name to the file which includes the AmlCode
 256           declaration.
 257
 258           If unsure, don't enter a file name.
 259
 260 config ACPI_CUSTOM_DSDT
 261         bool
 262         default ACPI_CUSTOM_DSDT_FILE != ""
 263
 264 config ACPI_BLACKLIST_YEAR
 265         int "Disable ACPI for systems before Jan 1st this year" if X86_32
 266         default 0
 267         help
 268           Enter a 4-digit year, e.g., 2001, to disable ACPI by default
 269           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
 275 config ACPI_DEBUG
 276         bool "Debug Statements"
 277         default n
 278         help
 279           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.
 286
 287 config 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
 295 config ACPI_PCI_SLOT
 296         tristate "PCI slot detection driver"
 297         depends on SYSFS
 298         default n
 299         help
 300           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.
 307
 308 config X86_PM_TIMER
 309         bool "Power Management Timer Support" if EXPERT
 310         depends on X86
 311         default y
 312         help
 313           The Power Management Timer is available on all ACPI-capable,
 314           in most cases even if ACPI is unusable or blacklisted.
 315
 316           This timing source is not affected by power management features
 317           like aggressive processor idling, throttling, frequency and/or
 318           voltage scaling, unlike the commonly used Time Stamp Counter
 319           (TSC) timing source.
 320
 321           You should nearly always say Y here because many modern
 322           systems require this timer.
 323
 324 config ACPI_CONTAINER
 325         tristate "Container and Module Devices (EXPERIMENTAL)"
 326         depends on EXPERIMENTAL
 327         default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU || ACPI_HOTPLUG_IO)
 328         help
 329           This driver supports ACPI Container and Module devices (IDs
 330           ACPI0004, PNP0A05, and PNP0A06).
 331
 332           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.
 336
 337 config ACPI_HOTPLUG_MEMORY
 338         tristate "Memory Hotplug"
 339         depends on MEMORY_HOTPLUG
 340         default n
 341         help
 342           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.
 346
 347           If your hardware and firmware do not support adding or
 348           removing memory devices at runtime, you need not enable
 349           this driver.
 350
 351           To compile this driver as a module, choose M here:
 352           the module will be called acpi_memhotplug.
 353
 354 config ACPI_SBS
 355         tristate "Smart Battery System"
 356         depends on X86
 357         select POWER_SUPPLY
 358         help
 359           This driver supports the Smart Battery System, another
 360           type of access to battery information, found on some laptops.
 361
 362           To compile this driver as a module, choose M here:
 363           the modules will be called sbs and sbshc.
 364
 365 config 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
 372 config 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
 377           This debug facility allows ACPI AML methods to be inserted and/or
 378           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
 387 config ACPI_BGRT
 388         tristate "Boottime Graphics Resource Table support"
 389         default n
 390         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
 396 source "drivers/acpi/apei/Kconfig"
 397
 398 endif   # ACPI