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  54           they have been replaced by functions in /sys.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  73           they have been replaced by functions in /sys.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