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         default y
  13         help
  14           Advanced Configuration and Power Interface (ACPI) support for
  15           Linux requires an ACPI-compliant platform (hardware/firmware),
  16           and assumes the presence of OS-directed configuration and power
  17           management (OSPM) software.  This option will enlarge your
  18           kernel by about 70K.
  19
  20           Linux ACPI provides a robust functional replacement for several
  21           legacy configuration and power management interfaces, including
  22           the Plug-and-Play BIOS specification (PnP BIOS), the
  23           MultiProcessor Specification (MPS), and the Advanced Power
  24           Management (APM) specification.  If both ACPI and APM support
  25           are configured, ACPI is used.
  26
  27           The project home page for the Linux ACPI subsystem is here:
  28           <http://www.lesswatts.org/projects/acpi/>
  29
  30           Linux support for ACPI is based on Intel Corporation's ACPI
  31           Component Architecture (ACPI CA).  For more information on the
  32           ACPI CA, see:
  33           <http://acpica.org/>
  34
  35           ACPI is an open industry specification co-developed by
  36           Hewlett-Packard, Intel, Microsoft, Phoenix, and Toshiba.
  37           The specification is available at:
  38           <http://www.acpi.info>
  39
  40 if ACPI
  41
  42 config ACPI_SLEEP
  43         bool
  44         depends on SUSPEND || HIBERNATION
  45         default y
  46
  47 config ACPI_PROCFS
  48         bool "Deprecated /proc/acpi files"
  49         depends on PROC_FS
  50         help
  51           For backwards compatibility, this option allows
  52           deprecated /proc/acpi/ files to exist, even when
  53           they have been replaced by functions in /sys.
  54           The deprecated files (and their replacements) include:
  55
  56           /proc/acpi/processor/*/throttling (/sys/class/thermal/
  57                 cooling_device*/*)
  58           /proc/acpi/video/*/brightness (/sys/class/backlight/)
  59           /proc/acpi/thermal_zone/*/* (/sys/class/thermal/)
  60           This option has no effect on /proc/acpi/ files
  61           and functions which do not yet exist in /sys.
  62
  63           Say N to delete /proc/acpi/ files that have moved to /sys/
  64
  65 config ACPI_PROCFS_POWER
  66         bool "Deprecated power /proc/acpi directories"
  67         depends on PROC_FS
  68         help
  69           For backwards compatibility, this option allows
  70           deprecated power /proc/acpi/ directories to exist, even when
  71           they have been replaced by functions in /sys.
  72           The deprecated directories (and their replacements) include:
  73           /proc/acpi/battery/* (/sys/class/power_supply/*)
  74           /proc/acpi/ac_adapter/* (sys/class/power_supply/*)
  75           This option has no effect on /proc/acpi/ directories
  76           and functions, which do not yet exist in /sys
  77
  78           Say N to delete power /proc/acpi/ directories that have moved to /sys/
  79
  80 config ACPI_POWER_METER
  81         tristate "ACPI 4.0 power meter"
  82         depends on HWMON
  83         help
  84           This driver exposes ACPI 4.0 power meters as hardware monitoring
  85           devices.  Say Y (or M) if you have a computer with ACPI 4.0 firmware
  86           and a power meter.
  87
  88           To compile this driver as a module, choose M here:
  89           the module will be called power-meter.
  90
  91 config ACPI_EC_DEBUGFS
  92         tristate "EC read/write access through /sys/kernel/debug/ec"
  93         default n
  94         help
  95           Say N to disable Embedded Controller /sys/kernel/debug interface
  96
  97           Be aware that using this interface can confuse your Embedded
  98           Controller in a way that a normal reboot is not enough. You then
  99           have to power off your system, and remove the laptop battery for
 100           some seconds.
 101           An Embedded Controller typically is available on laptops and reads
 102           sensor values like battery state and temperature.
 103           The kernel accesses the EC through ACPI parsed code provided by BIOS
 104           tables. This option allows to access the EC directly without ACPI
 105           code being involved.
 106           Thus this option is a debug option that helps to write ACPI drivers
 107           and can be used to identify ACPI code or EC firmware bugs.
 108
 109 config ACPI_PROC_EVENT
 110         bool "Deprecated /proc/acpi/event support"
 111         depends on PROC_FS
 112         default y
 113         help
 114           A user-space daemon, acpid, typically reads /proc/acpi/event
 115           and handles all ACPI-generated events.
 116
 117           These events are now delivered to user-space either
 118           via the input layer or as netlink events.
 119
 120           This build option enables the old code for legacy
 121           user-space implementation.  After some time, this will
 122           be moved under CONFIG_ACPI_PROCFS, and then deleted.
 123
 124           Say Y here to retain the old behaviour.  Say N if your
 125           user-space is newer than kernel 2.6.23 (September 2007).
 126
 127 config ACPI_AC
 128         tristate "AC Adapter"
 129         depends on X86
 130         select POWER_SUPPLY
 131         default y
 132         help
 133           This driver supports the AC Adapter object, which indicates
 134           whether a system is on AC or not.  If you have a system that can
 135           switch between A/C and battery, say Y.
 136
 137           To compile this driver as a module, choose M here:
 138           the module will be called ac.
 139
 140 config ACPI_BATTERY
 141         tristate "Battery"
 142         depends on X86
 143         select POWER_SUPPLY
 144         default y
 145         help
 146           This driver adds support for battery information through
 147           /proc/acpi/battery. If you have a mobile system with a battery,
 148           say Y.
 149
 150           To compile this driver as a module, choose M here:
 151           the module will be called battery.
 152
 153 config ACPI_BUTTON
 154         tristate "Button"
 155         depends on INPUT
 156         default y
 157         help
 158           This driver handles events on the power, sleep, and lid buttons.
 159           A daemon reads /proc/acpi/event and perform user-defined actions
 160           such as shutting down the system.  This is necessary for
 161           software-controlled poweroff.
 162
 163           To compile this driver as a module, choose M here:
 164           the module will be called button.
 165
 166 config ACPI_VIDEO
 167         tristate "Video"
 168         depends on X86 && BACKLIGHT_CLASS_DEVICE && VIDEO_OUTPUT_CONTROL
 169         depends on INPUT
 170         select THERMAL
 171         help
 172           This driver implements the ACPI Extensions For Display Adapters
 173           for integrated graphics devices on motherboard, as specified in
 174           ACPI 2.0 Specification, Appendix B.  This supports basic operations
 175           such as defining the video POST device, retrieving EDID information,
 176           and setting up a video output.
 177
 178           To compile this driver as a module, choose M here:
 179           the module will be called video.
 180
 181 config ACPI_FAN
 182         tristate "Fan"
 183         select THERMAL
 184         default y
 185         help
 186           This driver supports ACPI fan devices, allowing user-mode
 187           applications to perform basic fan control (on, off, status).
 188
 189           To compile this driver as a module, choose M here:
 190           the module will be called fan.
 191
 192 config ACPI_DOCK
 193         bool "Dock"
 194         depends on EXPERIMENTAL
 195         help
 196           This driver supports ACPI-controlled docking stations and removable
 197           drive bays such as the IBM Ultrabay and the Dell Module Bay.
 198
 199 config ACPI_PROCESSOR
 200         tristate "Processor"
 201         select THERMAL
 202         select CPU_IDLE
 203         default y
 204         help
 205           This driver installs ACPI as the idle handler for Linux and uses
 206           ACPI C2 and C3 processor states to save power on systems that
 207           support it.  It is required by several flavors of cpufreq
 208           performance-state drivers.
 209
 210           To compile this driver as a module, choose M here:
 211           the module will be called processor.
 212
 213 config ACPI_HOTPLUG_CPU
 214         bool
 215         depends on ACPI_PROCESSOR && HOTPLUG_CPU
 216         select ACPI_CONTAINER
 217         default y
 218
 219 config ACPI_PROCESSOR_AGGREGATOR
 220         tristate "Processor Aggregator"
 221         depends on ACPI_PROCESSOR
 222         depends on EXPERIMENTAL
 223         depends on X86
 224         help
 225           ACPI 4.0 defines processor Aggregator, which enables OS to perform
 226           specific processor configuration and control that applies to all
 227           processors in the platform. Currently only logical processor idling
 228           is defined, which is to reduce power consumption. This driver
 229           supports the new device.
 230
 231 config ACPI_THERMAL
 232         tristate "Thermal Zone"
 233         depends on ACPI_PROCESSOR
 234         select THERMAL
 235         default y
 236         help
 237           This driver supports ACPI thermal zones.  Most mobile and
 238           some desktop systems support ACPI thermal zones.  It is HIGHLY
 239           recommended that this option be enabled, as your processor(s)
 240           may be damaged without it.
 241
 242           To compile this driver as a module, choose M here:
 243           the module will be called thermal.
 244
 245 config ACPI_NUMA
 246         bool "NUMA support"
 247         depends on NUMA
 248         depends on (X86 || IA64)
 249         default y if IA64_GENERIC || IA64_SGI_SN2
 250
 251 config ACPI_CUSTOM_DSDT_FILE
 252         string "Custom DSDT Table file to include"
 253         default ""
 254         depends on !STANDALONE
 255         help
 256           This option supports a custom DSDT by linking it into the kernel.
 257           See Documentation/acpi/dsdt-override.txt
 258
 259           Enter the full path name to the file which includes the AmlCode
 260           declaration.
 261
 262           If unsure, don't enter a file name.
 263
 264 config ACPI_CUSTOM_DSDT
 265         bool
 266         default ACPI_CUSTOM_DSDT_FILE != ""
 267
 268 config ACPI_BLACKLIST_YEAR
 269         int "Disable ACPI for systems before Jan 1st this year" if X86_32
 270         default 0
 271         help
 272           Enter a 4-digit year, e.g., 2001, to disable ACPI by default
 273           on platforms with DMI BIOS date before January 1st that year.
 274           "acpi=force" can be used to override this mechanism.
 275
 276           Enter 0 to disable this mechanism and allow ACPI to
 277           run by default no matter what the year.  (default)
 278
 279 config ACPI_DEBUG
 280         bool "Debug Statements"
 281         default n
 282         help
 283           The ACPI subsystem can produce debug output.  Saying Y enables this
 284           output and increases the kernel size by around 50K.
 285
 286           Use the acpi.debug_layer and acpi.debug_level kernel command-line
 287           parameters documented in Documentation/acpi/debug.txt and
 288           Documentation/kernel-parameters.txt to control the type and
 289           amount of debug output.
 290
 291 config ACPI_DEBUG_FUNC_TRACE
 292         bool "Additionally enable ACPI function tracing"
 293         default n
 294         depends on ACPI_DEBUG
 295         help
 296           ACPI Debug Statements slow down ACPI processing. Function trace
 297           is about half of the penalty and is rarely useful.
 298
 299 config ACPI_PCI_SLOT
 300         tristate "PCI slot detection driver"
 301         depends on SYSFS
 302         default n
 303         help
 304           This driver creates entries in /sys/bus/pci/slots/ for all PCI
 305           slots in the system.  This can help correlate PCI bus addresses,
 306           i.e., segment/bus/device/function tuples, with physical slots in
 307           the system.  If you are unsure, say N.
 308
 309           To compile this driver as a module, choose M here:
 310           the module will be called pci_slot.
 311
 312 config X86_PM_TIMER
 313         bool "Power Management Timer Support" if EMBEDDED
 314         depends on X86
 315         default y
 316         help
 317           The Power Management Timer is available on all ACPI-capable,
 318           in most cases even if ACPI is unusable or blacklisted.
 319
 320           This timing source is not affected by power management features
 321           like aggressive processor idling, throttling, frequency and/or
 322           voltage scaling, unlike the commonly used Time Stamp Counter
 323           (TSC) timing source.
 324
 325           You should nearly always say Y here because many modern
 326           systems require this timer.
 327
 328 config ACPI_CONTAINER
 329         tristate "Container and Module Devices (EXPERIMENTAL)"
 330         depends on EXPERIMENTAL
 331         default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU || ACPI_HOTPLUG_IO)
 332         help
 333           This driver supports ACPI Container and Module devices (IDs
 334           ACPI0004, PNP0A05, and PNP0A06).
 335
 336           This helps support hotplug of nodes, CPUs, and memory.
 337
 338           To compile this driver as a module, choose M here:
 339           the module will be called container.
 340
 341 config ACPI_HOTPLUG_MEMORY
 342         tristate "Memory Hotplug"
 343         depends on MEMORY_HOTPLUG
 344         default n
 345         help
 346           This driver supports ACPI memory hotplug.  The driver
 347           fields notifications on ACPI memory devices (PNP0C80),
 348           which represent memory ranges that may be onlined or
 349           offlined during runtime.
 350
 351           If your hardware and firmware do not support adding or
 352           removing memory devices at runtime, you need not enable
 353           this driver.
 354
 355           To compile this driver as a module, choose M here:
 356           the module will be called acpi_memhotplug.
 357
 358 config ACPI_SBS
 359         tristate "Smart Battery System"
 360         depends on X86
 361         select POWER_SUPPLY
 362         help
 363           This driver supports the Smart Battery System, another
 364           type of access to battery information, found on some laptops.
 365
 366           To compile this driver as a module, choose M here:
 367           the modules will be called sbs and sbshc.
 368
 369 config ACPI_HED
 370         tristate "Hardware Error Device"
 371         help
 372           This driver supports the Hardware Error Device (PNP0C33),
 373           which is used to report some hardware errors notified via
 374           SCI, mainly the corrected errors.
 375
 376 source "drivers/acpi/apei/Kconfig"
 377
 378 endif   # ACPI