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  52           they have been replaced by functions in /sys.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         help
 180           This driver supports ACPI-controlled docking stations and removable
 181           drive bays such as the IBM Ultrabay and the Dell Module Bay.
 182
 183 config ACPI_I2C
 184         def_tristate I2C
 185         depends on I2C
 186         help
 187           ACPI I2C enumeration support.
 188
 189 config ACPI_PROCESSOR
 190         tristate "Processor"
 191         select THERMAL
 192         select CPU_IDLE
 193         default y
 194         help
 195           This driver installs ACPI as the idle handler for Linux and uses
 196           ACPI C2 and C3 processor states to save power on systems that
 197           support it.  It is required by several flavors of cpufreq
 198           performance-state drivers.
 199
 200           To compile this driver as a module, choose M here:
 201           the module will be called processor.
 202 config ACPI_IPMI
 203         tristate "IPMI"
 204         depends on IPMI_SI && IPMI_HANDLER
 205         default n
 206         help
 207           This driver enables the ACPI to access the BMC controller. And it
 208           uses the IPMI request/response message to communicate with BMC
 209           controller, which can be found on on the server.
 210
 211           To compile this driver as a module, choose M here:
 212           the module will be called as acpi_ipmi.
 213
 214 config ACPI_HOTPLUG_CPU
 215         bool
 216         depends on ACPI_PROCESSOR && HOTPLUG_CPU
 217         select ACPI_CONTAINER
 218         default y
 219
 220 config ACPI_PROCESSOR_AGGREGATOR
 221         tristate "Processor Aggregator"
 222         depends on ACPI_PROCESSOR
 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_INITRD_TABLE_OVERRIDE
 269         bool "ACPI tables override via initrd"
 270         depends on BLK_DEV_INITRD && X86
 271         default n
 272         help
 273           This option provides functionality to override arbitrary ACPI tables
 274           via initrd. No functional change if no ACPI tables are passed via
 275           initrd, therefore it's safe to say Y.
 276           See Documentation/acpi/initrd_table_override.txt for details
 277
 278 config ACPI_BLACKLIST_YEAR
 279         int "Disable ACPI for systems before Jan 1st this year" if X86_32
 280         default 0
 281         help
 282           Enter a 4-digit year, e.g., 2001, to disable ACPI by default
 283           on platforms with DMI BIOS date before January 1st that year.
 284           "acpi=force" can be used to override this mechanism.
 285
 286           Enter 0 to disable this mechanism and allow ACPI to
 287           run by default no matter what the year.  (default)
 288
 289 config ACPI_DEBUG
 290         bool "Debug Statements"
 291         default n
 292         help
 293           The ACPI subsystem can produce debug output.  Saying Y enables this
 294           output and increases the kernel size by around 50K.
 295
 296           Use the acpi.debug_layer and acpi.debug_level kernel command-line
 297           parameters documented in Documentation/acpi/debug.txt and
 298           Documentation/kernel-parameters.txt to control the type and
 299           amount of debug output.
 300
 301 config ACPI_DEBUG_FUNC_TRACE
 302         bool "Additionally enable ACPI function tracing"
 303         default n
 304         depends on ACPI_DEBUG
 305         help
 306           ACPI Debug Statements slow down ACPI processing. Function trace
 307           is about half of the penalty and is rarely useful.
 308
 309 config ACPI_PCI_SLOT
 310         bool "PCI slot detection driver"
 311         depends on SYSFS
 312         default n
 313         help
 314           This driver creates entries in /sys/bus/pci/slots/ for all PCI
 315           slots in the system.  This can help correlate PCI bus addresses,
 316           i.e., segment/bus/device/function tuples, with physical slots in
 317           the system.  If you are unsure, say N.
 318
 319 config X86_PM_TIMER
 320         bool "Power Management Timer Support" if EXPERT
 321         depends on X86
 322         default y
 323         help
 324           The Power Management Timer is available on all ACPI-capable,
 325           in most cases even if ACPI is unusable or blacklisted.
 326
 327           This timing source is not affected by power management features
 328           like aggressive processor idling, throttling, frequency and/or
 329           voltage scaling, unlike the commonly used Time Stamp Counter
 330           (TSC) timing source.
 331
 332           You should nearly always say Y here because many modern
 333           systems require this timer.
 334
 335 config ACPI_CONTAINER
 336         bool "Container and Module Devices"
 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         select POWER_SUPPLY
 368         help
 369           This driver supports the Smart Battery System, another
 370           type of access to battery information, found on some laptops.
 371
 372           To compile this driver as a module, choose M here:
 373           the modules will be called sbs and sbshc.
 374
 375 config ACPI_HED
 376         tristate "Hardware Error Device"
 377         help
 378           This driver supports the Hardware Error Device (PNP0C33),
 379           which is used to report some hardware errors notified via
 380           SCI, mainly the corrected errors.
 381
 382 config ACPI_CUSTOM_METHOD
 383         tristate "Allow ACPI methods to be inserted/replaced at run time"
 384         depends on DEBUG_FS
 385         default n
 386         help
 387           This debug facility allows ACPI AML methods to be inserted and/or
 388           replaced without rebooting the system. For details refer to:
 389           Documentation/acpi/method-customizing.txt.
 390
 391           NOTE: This option is security sensitive, because it allows arbitrary
 392           kernel memory to be written to by root (uid=0) users, allowing them
 393           to bypass certain security measures (e.g. if root is not allowed to
 394           load additional kernel modules after boot, this feature may be used
 395           to override that restriction).
 396
 397 config ACPI_BGRT
 398         bool "Boottime Graphics Resource Table support"
 399         depends on EFI
 400         help
 401           This driver adds support for exposing the ACPI Boottime Graphics
 402           Resource Table, which allows the operating system to obtain
 403           data from the firmware boot splash. It will appear under
 404           /sys/firmware/acpi/bgrt/ .
 405
 406 source "drivers/acpi/apei/Kconfig"
 407
 408 endif   # ACPI