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  52           they have been replaced by functions in /sys.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 can be passed via uncompressed cpio in initrd"
 270         default n
 271         help
 272           This option provides functionality to override arbitrary ACPI tables
 273           via initrd. No functional change if no ACPI tables are passed via
 274           initrd, therefore it's safe to say Y.
 275           See Documentation/acpi/initrd_table_override.txt for details
 276
 277 config ACPI_BLACKLIST_YEAR
 278         int "Disable ACPI for systems before Jan 1st this year" if X86_32
 279         default 0
 280         help
 281           Enter a 4-digit year, e.g., 2001, to disable ACPI by default
 282           on platforms with DMI BIOS date before January 1st that year.
 283           "acpi=force" can be used to override this mechanism.
 284
 285           Enter 0 to disable this mechanism and allow ACPI to
 286           run by default no matter what the year.  (default)
 287
 288 config ACPI_DEBUG
 289         bool "Debug Statements"
 290         default n
 291         help
 292           The ACPI subsystem can produce debug output.  Saying Y enables this
 293           output and increases the kernel size by around 50K.
 294
 295           Use the acpi.debug_layer and acpi.debug_level kernel command-line
 296           parameters documented in Documentation/acpi/debug.txt and
 297           Documentation/kernel-parameters.txt to control the type and
 298           amount of debug output.
 299
 300 config ACPI_DEBUG_FUNC_TRACE
 301         bool "Additionally enable ACPI function tracing"
 302         default n
 303         depends on ACPI_DEBUG
 304         help
 305           ACPI Debug Statements slow down ACPI processing. Function trace
 306           is about half of the penalty and is rarely useful.
 307
 308 config ACPI_PCI_SLOT
 309         bool "PCI slot detection driver"
 310         depends on SYSFS
 311         default n
 312         help
 313           This driver creates entries in /sys/bus/pci/slots/ for all PCI
 314           slots in the system.  This can help correlate PCI bus addresses,
 315           i.e., segment/bus/device/function tuples, with physical slots in
 316           the system.  If you are unsure, say N.
 317
 318 config X86_PM_TIMER
 319         bool "Power Management Timer Support" if EXPERT
 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         bool "Container and Module Devices"
 336         default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU || ACPI_HOTPLUG_IO)
 337         help
 338           This driver supports ACPI Container and Module devices (IDs
 339           ACPI0004, PNP0A05, and PNP0A06).
 340
 341           This helps support hotplug of nodes, CPUs, and memory.
 342
 343           To compile this driver as a module, choose M here:
 344           the module will be called container.
 345
 346 config ACPI_HOTPLUG_MEMORY
 347         tristate "Memory Hotplug"
 348         depends on MEMORY_HOTPLUG
 349         default n
 350         help
 351           This driver supports ACPI memory hotplug.  The driver
 352           fields notifications on ACPI memory devices (PNP0C80),
 353           which represent memory ranges that may be onlined or
 354           offlined during runtime.
 355
 356           If your hardware and firmware do not support adding or
 357           removing memory devices at runtime, you need not enable
 358           this driver.
 359
 360           To compile this driver as a module, choose M here:
 361           the module will be called acpi_memhotplug.
 362
 363 config ACPI_SBS
 364         tristate "Smart Battery System"
 365         depends on X86
 366         select POWER_SUPPLY
 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 config ACPI_CUSTOM_METHOD
 382         tristate "Allow ACPI methods to be inserted/replaced at run time"
 383         depends on DEBUG_FS
 384         default n
 385         help
 386           This debug facility allows ACPI AML methods to be inserted and/or
 387           replaced without rebooting the system. For details refer to:
 388           Documentation/acpi/method-customizing.txt.
 389
 390           NOTE: This option is security sensitive, because it allows arbitrary
 391           kernel memory to be written to by root (uid=0) users, allowing them
 392           to bypass certain security measures (e.g. if root is not allowed to
 393           load additional kernel modules after boot, this feature may be used
 394           to override that restriction).
 395
 396 config ACPI_BGRT
 397         bool "Boottime Graphics Resource Table support"
 398         depends on EFI
 399         help
 400           This driver adds support for exposing the ACPI Boottime Graphics
 401           Resource Table, which allows the operating system to obtain
 402           data from the firmware boot splash. It will appear under
 403           /sys/firmware/acpi/bgrt/ .
 404
 405 source "drivers/acpi/apei/Kconfig"
 406
 407 endif   # ACPI