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         depends on PM
  11         select PNP
  12         select CPU_IDLE
  13         default y
  14         help
  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
  19           kernel by about 70K.
  20
  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.
  27
  28           The project home page for the Linux ACPI subsystem is here:
  29           <http://www.lesswatts.org/projects/acpi/>
  30
  31           Linux support for ACPI is based on Intel Corporation's ACPI
  32           Component Architecture (ACPI CA).  For more information on the
  33           ACPI CA, see:
  34           <http://acpica.org/>
  35
  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>
  40
  41 if ACPI
  42
  43 config ACPI_SLEEP
  44         bool
  45         depends on SUSPEND || HIBERNATION
  46         default y
  47
  48 config ACPI_PROCFS
  49         bool "Deprecated /proc/acpi files"
  50         depends on PROC_FS
  51         help
  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  54           they have been replaced by functions in /sys.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:
  56
  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)
  63           /proc/acpi/processor/*/power (/sys/devices/system/cpu/*/cpuidle/*)
  64           /proc/acpi/processor/*/performance (/sys/devices/system/cpu/*/
  65                 cpufreq/*)
  66           /proc/acpi/processor/*/throttling (/sys/class/thermal/
  67                 cooling_device*/*)
  68           This option has no effect on /proc/acpi/ files
  69           and functions which do not yet exist in /sys.
  70
  71           Say N to delete /proc/acpi/ files that have moved to /sys/
  72
  73 config ACPI_PROCFS_POWER
  74         bool "Deprecated power /proc/acpi directories"
  75         depends on PROC_FS
  76         default y
  77         help
  78           For backwards compatibility, this option allows
  79           deprecated power /proc/acpi/ directories to exist, even when
  80           they have been replaced by functions in /sys.
  81           The deprecated directories (and their replacements) include:
  82           /proc/acpi/battery/* (/sys/class/power_supply/*)
  83           /proc/acpi/ac_adapter/* (sys/class/power_supply/*)
  84           This option has no effect on /proc/acpi/ directories
  85           and functions, which do not yet exist in /sys
  86
  87           Say N to delete power /proc/acpi/ directories that have moved to /sys/
  88
  89 config ACPI_POWER_METER
  90         tristate "ACPI 4.0 power meter"
  91         depends on HWMON
  92         help
  93           This driver exposes ACPI 4.0 power meters as hardware monitoring
  94           devices.  Say Y (or M) if you have a computer with ACPI 4.0 firmware
  95           and a power meter.
  96
  97           To compile this driver as a module, choose M here:
  98           the module will be called power-meter.
  99
 100 config ACPI_SYSFS_POWER
 101         bool "Future power /sys interface"
 102         select POWER_SUPPLY
 103         default y
 104         help
 105           Say N to disable power /sys interface
 106
 107 config ACPI_EC_DEBUGFS
 108         tristate "EC read/write access through /sys/kernel/debug/ec"
 109         default n
 110         help
 111           Say N to disable Embedded Controller /sys/kernel/debug interface
 112
 113           Be aware that using this interface can confuse your Embedded
 114           Controller in a way that a normal reboot is not enough. You then
 115           have to power of your system, and remove the laptop battery for
 116           some seconds.
 117           An Embedded Controller typically is available on laptops and reads
 118           sensor values like battery state and temperature.
 119           The kernel accesses the EC through ACPI parsed code provided by BIOS
 120           tables. This option allows to access the EC directly without ACPI
 121           code being involved.
 122           Thus this option is a debug option that helps to write ACPI drivers
 123           and can be used to identify ACPI code or EC firmware bugs.
 124
 125 config ACPI_PROC_EVENT
 126         bool "Deprecated /proc/acpi/event support"
 127         depends on PROC_FS
 128         default y
 129         help
 130           A user-space daemon, acpid, typically reads /proc/acpi/event
 131           and handles all ACPI-generated events.
 132
 133           These events are now delivered to user-space either
 134           via the input layer or as netlink events.
 135
 136           This build option enables the old code for legacy
 137           user-space implementation.  After some time, this will
 138           be moved under CONFIG_ACPI_PROCFS, and then deleted.
 139
 140           Say Y here to retain the old behaviour.  Say N if your
 141           user-space is newer than kernel 2.6.23 (September 2007).
 142
 143 config ACPI_AC
 144         tristate "AC Adapter"
 145         depends on X86
 146         default y
 147         help
 148           This driver supports the AC Adapter object, which indicates
 149           whether a system is on AC or not.  If you have a system that can
 150           switch between A/C and battery, say Y.
 151
 152           To compile this driver as a module, choose M here:
 153           the module will be called ac.
 154
 155 config ACPI_BATTERY
 156         tristate "Battery"
 157         depends on X86
 158         default y
 159         help
 160           This driver adds support for battery information through
 161           /proc/acpi/battery. If you have a mobile system with a battery,
 162           say Y.
 163
 164           To compile this driver as a module, choose M here:
 165           the module will be called battery.
 166
 167 config ACPI_BUTTON
 168         tristate "Button"
 169         depends on INPUT
 170         default y
 171         help
 172           This driver handles events on the power, sleep, and lid buttons.
 173           A daemon reads /proc/acpi/event and perform user-defined actions
 174           such as shutting down the system.  This is necessary for
 175           software-controlled poweroff.
 176
 177           To compile this driver as a module, choose M here:
 178           the module will be called button.
 179
 180 config ACPI_VIDEO
 181         tristate "Video"
 182         depends on X86 && BACKLIGHT_CLASS_DEVICE && VIDEO_OUTPUT_CONTROL
 183         depends on INPUT
 184         select THERMAL
 185         help
 186           This driver implements the ACPI Extensions For Display Adapters
 187           for integrated graphics devices on motherboard, as specified in
 188           ACPI 2.0 Specification, Appendix B.  This supports basic operations
 189           such as defining the video POST device, retrieving EDID information,
 190           and setting up a video output.
 191
 192           To compile this driver as a module, choose M here:
 193           the module will be called video.
 194
 195 config ACPI_FAN
 196         tristate "Fan"
 197         select THERMAL
 198         default y
 199         help
 200           This driver supports ACPI fan devices, allowing user-mode
 201           applications to perform basic fan control (on, off, status).
 202
 203           To compile this driver as a module, choose M here:
 204           the module will be called fan.
 205
 206 config ACPI_DOCK
 207         bool "Dock"
 208         depends on EXPERIMENTAL
 209         help
 210           This driver supports ACPI-controlled docking stations and removable
 211           drive bays such as the IBM Ultrabay and the Dell Module Bay.
 212
 213 config ACPI_PROCESSOR
 214         tristate "Processor"
 215         select THERMAL
 216         default y
 217         help
 218           This driver installs ACPI as the idle handler for Linux and uses
 219           ACPI C2 and C3 processor states to save power on systems that
 220           support it.  It is required by several flavors of cpufreq
 221           performance-state drivers.
 222
 223           To compile this driver as a module, choose M here:
 224           the module will be called processor.
 225
 226 config ACPI_HOTPLUG_CPU
 227         bool
 228         depends on ACPI_PROCESSOR && HOTPLUG_CPU
 229         select ACPI_CONTAINER
 230         default y
 231
 232 config ACPI_PROCESSOR_AGGREGATOR
 233         tristate "Processor Aggregator"
 234         depends on ACPI_PROCESSOR
 235         depends on EXPERIMENTAL
 236         depends on X86
 237         help
 238           ACPI 4.0 defines processor Aggregator, which enables OS to perform
 239           specific processor configuration and control that applies to all
 240           processors in the platform. Currently only logical processor idling
 241           is defined, which is to reduce power consumption. This driver
 242           supports the new device.
 243
 244 config ACPI_THERMAL
 245         tristate "Thermal Zone"
 246         depends on ACPI_PROCESSOR
 247         select THERMAL
 248         default y
 249         help
 250           This driver supports ACPI thermal zones.  Most mobile and
 251           some desktop systems support ACPI thermal zones.  It is HIGHLY
 252           recommended that this option be enabled, as your processor(s)
 253           may be damaged without it.
 254
 255           To compile this driver as a module, choose M here:
 256           the module will be called thermal.
 257
 258 config ACPI_NUMA
 259         bool "NUMA support"
 260         depends on NUMA
 261         depends on (X86 || IA64)
 262         default y if IA64_GENERIC || IA64_SGI_SN2
 263
 264 config ACPI_CUSTOM_DSDT_FILE
 265         string "Custom DSDT Table file to include"
 266         default ""
 267         depends on !STANDALONE
 268         help
 269           This option supports a custom DSDT by linking it into the kernel.
 270           See Documentation/acpi/dsdt-override.txt
 271
 272           Enter the full path name to the file which includes the AmlCode
 273           declaration.
 274
 275           If unsure, don't enter a file name.
 276
 277 config ACPI_CUSTOM_DSDT
 278         bool
 279         default ACPI_CUSTOM_DSDT_FILE != ""
 280
 281 config ACPI_BLACKLIST_YEAR
 282         int "Disable ACPI for systems before Jan 1st this year" if X86_32
 283         default 0
 284         help
 285           Enter a 4-digit year, e.g., 2001, to disable ACPI by default
 286           on platforms with DMI BIOS date before January 1st that year.
 287           "acpi=force" can be used to override this mechanism.
 288
 289           Enter 0 to disable this mechanism and allow ACPI to
 290           run by default no matter what the year.  (default)
 291
 292 config ACPI_DEBUG
 293         bool "Debug Statements"
 294         default n
 295         help
 296           The ACPI subsystem can produce debug output.  Saying Y enables this
 297           output and increases the kernel size by around 50K.
 298
 299           Use the acpi.debug_layer and acpi.debug_level kernel command-line
 300           parameters documented in Documentation/acpi/debug.txt and
 301           Documentation/kernel-parameters.txt to control the type and
 302           amount of debug output.
 303
 304 config ACPI_DEBUG_FUNC_TRACE
 305         bool "Additionally enable ACPI function tracing"
 306         default n
 307         depends on ACPI_DEBUG
 308         help
 309           ACPI Debug Statements slow down ACPI processing. Function trace
 310           is about half of the penalty and is rarely useful.
 311
 312 config ACPI_PCI_SLOT
 313         tristate "PCI slot detection driver"
 314         depends on SYSFS
 315         default n
 316         help
 317           This driver creates entries in /sys/bus/pci/slots/ for all PCI
 318           slots in the system.  This can help correlate PCI bus addresses,
 319           i.e., segment/bus/device/function tuples, with physical slots in
 320           the system.  If you are unsure, say N.
 321
 322           To compile this driver as a module, choose M here:
 323           the module will be called pci_slot.
 324
 325 config X86_PM_TIMER
 326         bool "Power Management Timer Support" if EMBEDDED
 327         depends on X86
 328         default y
 329         help
 330           The Power Management Timer is available on all ACPI-capable,
 331           in most cases even if ACPI is unusable or blacklisted.
 332
 333           This timing source is not affected by power management features
 334           like aggressive processor idling, throttling, frequency and/or
 335           voltage scaling, unlike the commonly used Time Stamp Counter
 336           (TSC) timing source.
 337
 338           You should nearly always say Y here because many modern
 339           systems require this timer.
 340
 341 config ACPI_CONTAINER
 342         tristate "Container and Module Devices (EXPERIMENTAL)"
 343         depends on EXPERIMENTAL
 344         default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU || ACPI_HOTPLUG_IO)
 345         help
 346           This driver supports ACPI Container and Module devices (IDs
 347           ACPI0004, PNP0A05, and PNP0A06).
 348
 349           This helps support hotplug of nodes, CPUs, and memory.
 350
 351           To compile this driver as a module, choose M here:
 352           the module will be called container.
 353
 354 config ACPI_HOTPLUG_MEMORY
 355         tristate "Memory Hotplug"
 356         depends on MEMORY_HOTPLUG
 357         default n
 358         help
 359           This driver supports ACPI memory hotplug.  The driver
 360           fields notifications on ACPI memory devices (PNP0C80),
 361           which represent memory ranges that may be onlined or
 362           offlined during runtime.
 363
 364           If your hardware and firmware do not support adding or
 365           removing memory devices at runtime, you need not enable
 366           this driver.
 367
 368           To compile this driver as a module, choose M here:
 369           the module will be called acpi_memhotplug.
 370
 371 config ACPI_SBS
 372         tristate "Smart Battery System"
 373         depends on X86
 374         help
 375           This driver supports the Smart Battery System, another
 376           type of access to battery information, found on some laptops.
 377
 378           To compile this driver as a module, choose M here:
 379           the modules will be called sbs and sbshc.
 380
 381 config ACPI_HED
 382         tristate "Hardware Error Device"
 383         help
 384           This driver supports the Hardware Error Device (PNP0C33),
 385           which is used to report some hardware errors notified via
 386           SCI, mainly the corrected errors.
 387
 388 source "drivers/acpi/apei/Kconfig"
 389
 390 endif   # ACPI