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           <https://01.org/linux-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  52           they have been replaced by functions in /sys.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_AC
  95         tristate "AC Adapter"
  96         depends on X86
  97         select POWER_SUPPLY
  98         default y
  99         help
 100           This driver supports the AC Adapter object, which indicates
 101           whether a system is on AC or not.  If you have a system that can
 102           switch between A/C and battery, say Y.
 103
 104           To compile this driver as a module, choose M here:
 105           the module will be called ac.
 106
 107 config ACPI_BATTERY
 108         tristate "Battery"
 109         depends on X86
 110         select POWER_SUPPLY
 111         default y
 112         help
 113           This driver adds support for battery information through
 114           /proc/acpi/battery. If you have a mobile system with a battery,
 115           say Y.
 116
 117           To compile this driver as a module, choose M here:
 118           the module will be called battery.
 119
 120 config ACPI_BUTTON
 121         tristate "Button"
 122         depends on INPUT
 123         default y
 124         help
 125           This driver handles events on the power, sleep, and lid buttons.
 126           A daemon reads events from input devices or via netlink and
 127           performs user-defined actions such as shutting down the system.
 128           This is necessary for software-controlled poweroff.
 129
 130           To compile this driver as a module, choose M here:
 131           the module will be called button.
 132
 133 config ACPI_VIDEO
 134         tristate "Video"
 135         depends on X86 && BACKLIGHT_CLASS_DEVICE && VIDEO_OUTPUT_CONTROL
 136         depends on INPUT
 137         select THERMAL
 138         help
 139           This driver implements the ACPI Extensions For Display Adapters
 140           for integrated graphics devices on motherboard, as specified in
 141           ACPI 2.0 Specification, Appendix B.  This supports basic operations
 142           such as defining the video POST device, retrieving EDID information,
 143           and setting up a video output.
 144
 145           To compile this driver as a module, choose M here:
 146           the module will be called video.
 147
 148 config ACPI_FAN
 149         tristate "Fan"
 150         select THERMAL
 151         default y
 152         help
 153           This driver supports ACPI fan devices, allowing user-mode
 154           applications to perform basic fan control (on, off, status).
 155
 156           To compile this driver as a module, choose M here:
 157           the module will be called fan.
 158
 159 config ACPI_DOCK
 160         bool "Dock"
 161         help
 162           This driver supports ACPI-controlled docking stations and removable
 163           drive bays such as the IBM Ultrabay and the Dell Module Bay.
 164
 165 config ACPI_PROCESSOR
 166         tristate "Processor"
 167         select THERMAL
 168         select CPU_IDLE
 169         default y
 170         help
 171           This driver installs ACPI as the idle handler for Linux and uses
 172           ACPI C2 and C3 processor states to save power on systems that
 173           support it.  It is required by several flavors of cpufreq
 174           performance-state drivers.
 175
 176           To compile this driver as a module, choose M here:
 177           the module will be called processor.
 178 config ACPI_IPMI
 179         tristate "IPMI"
 180         depends on IPMI_SI && IPMI_HANDLER
 181         default n
 182         help
 183           This driver enables the ACPI to access the BMC controller. And it
 184           uses the IPMI request/response message to communicate with BMC
 185           controller, which can be found on on the server.
 186
 187           To compile this driver as a module, choose M here:
 188           the module will be called as acpi_ipmi.
 189
 190 config ACPI_HOTPLUG_CPU
 191         bool
 192         depends on ACPI_PROCESSOR && HOTPLUG_CPU
 193         select ACPI_CONTAINER
 194         default y
 195
 196 config ACPI_PROCESSOR_AGGREGATOR
 197         tristate "Processor Aggregator"
 198         depends on ACPI_PROCESSOR
 199         depends on X86
 200         help
 201           ACPI 4.0 defines processor Aggregator, which enables OS to perform
 202           specific processor configuration and control that applies to all
 203           processors in the platform. Currently only logical processor idling
 204           is defined, which is to reduce power consumption. This driver
 205           supports the new device.
 206
 207 config ACPI_THERMAL
 208         tristate "Thermal Zone"
 209         depends on ACPI_PROCESSOR
 210         select THERMAL
 211         default y
 212         help
 213           This driver supports ACPI thermal zones.  Most mobile and
 214           some desktop systems support ACPI thermal zones.  It is HIGHLY
 215           recommended that this option be enabled, as your processor(s)
 216           may be damaged without it.
 217
 218           To compile this driver as a module, choose M here:
 219           the module will be called thermal.
 220
 221 config ACPI_NUMA
 222         bool "NUMA support"
 223         depends on NUMA
 224         depends on (X86 || IA64)
 225         default y if IA64_GENERIC || IA64_SGI_SN2
 226
 227 config ACPI_CUSTOM_DSDT_FILE
 228         string "Custom DSDT Table file to include"
 229         default ""
 230         depends on !STANDALONE
 231         help
 232           This option supports a custom DSDT by linking it into the kernel.
 233           See Documentation/acpi/dsdt-override.txt
 234
 235           Enter the full path name to the file which includes the AmlCode
 236           declaration.
 237
 238           If unsure, don't enter a file name.
 239
 240 config ACPI_CUSTOM_DSDT
 241         bool
 242         default ACPI_CUSTOM_DSDT_FILE != ""
 243
 244 config ACPI_INITRD_TABLE_OVERRIDE
 245         bool "ACPI tables override via initrd"
 246         depends on BLK_DEV_INITRD && X86
 247         default n
 248         help
 249           This option provides functionality to override arbitrary ACPI tables
 250           via initrd. No functional change if no ACPI tables are passed via
 251           initrd, therefore it's safe to say Y.
 252           See Documentation/acpi/initrd_table_override.txt for details
 253
 254 config ACPI_BLACKLIST_YEAR
 255         int "Disable ACPI for systems before Jan 1st this year" if X86_32
 256         default 0
 257         help
 258           Enter a 4-digit year, e.g., 2001, to disable ACPI by default
 259           on platforms with DMI BIOS date before January 1st that year.
 260           "acpi=force" can be used to override this mechanism.
 261
 262           Enter 0 to disable this mechanism and allow ACPI to
 263           run by default no matter what the year.  (default)
 264
 265 config ACPI_DEBUG
 266         bool "Debug Statements"
 267         default n
 268         help
 269           The ACPI subsystem can produce debug output.  Saying Y enables this
 270           output and increases the kernel size by around 50K.
 271
 272           Use the acpi.debug_layer and acpi.debug_level kernel command-line
 273           parameters documented in Documentation/acpi/debug.txt and
 274           Documentation/kernel-parameters.txt to control the type and
 275           amount of debug output.
 276
 277 config ACPI_PCI_SLOT
 278         bool "PCI slot detection driver"
 279         depends on SYSFS
 280         default n
 281         help
 282           This driver creates entries in /sys/bus/pci/slots/ for all PCI
 283           slots in the system.  This can help correlate PCI bus addresses,
 284           i.e., segment/bus/device/function tuples, with physical slots in
 285           the system.  If you are unsure, say N.
 286
 287 config X86_PM_TIMER
 288         bool "Power Management Timer Support" if EXPERT
 289         depends on X86
 290         default y
 291         help
 292           The Power Management Timer is available on all ACPI-capable,
 293           in most cases even if ACPI is unusable or blacklisted.
 294
 295           This timing source is not affected by power management features
 296           like aggressive processor idling, throttling, frequency and/or
 297           voltage scaling, unlike the commonly used Time Stamp Counter
 298           (TSC) timing source.
 299
 300           You should nearly always say Y here because many modern
 301           systems require this timer.
 302
 303 config ACPI_CONTAINER
 304         bool "Container and Module Devices"
 305         default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU)
 306         help
 307           This driver supports ACPI Container and Module devices (IDs
 308           ACPI0004, PNP0A05, and PNP0A06).
 309
 310           This helps support hotplug of nodes, CPUs, and memory.
 311
 312           To compile this driver as a module, choose M here:
 313           the module will be called container.
 314
 315 config ACPI_HOTPLUG_MEMORY
 316         bool "Memory Hotplug"
 317         depends on MEMORY_HOTPLUG
 318         help
 319           This driver supports ACPI memory hotplug.  The driver
 320           fields notifications on ACPI memory devices (PNP0C80),
 321           which represent memory ranges that may be onlined or
 322           offlined during runtime.
 323
 324           If your hardware and firmware do not support adding or
 325           removing memory devices at runtime, you need not enable
 326           this driver.
 327
 328           To compile this driver as a module, choose M here:
 329           the module will be called acpi_memhotplug.
 330
 331 config ACPI_SBS
 332         tristate "Smart Battery System"
 333         depends on X86
 334         select POWER_SUPPLY
 335         help
 336           This driver supports the Smart Battery System, another
 337           type of access to battery information, found on some laptops.
 338
 339           To compile this driver as a module, choose M here:
 340           the modules will be called sbs and sbshc.
 341
 342 config ACPI_HED
 343         tristate "Hardware Error Device"
 344         help
 345           This driver supports the Hardware Error Device (PNP0C33),
 346           which is used to report some hardware errors notified via
 347           SCI, mainly the corrected errors.
 348
 349 config ACPI_CUSTOM_METHOD
 350         tristate "Allow ACPI methods to be inserted/replaced at run time"
 351         depends on DEBUG_FS
 352         default n
 353         help
 354           This debug facility allows ACPI AML methods to be inserted and/or
 355           replaced without rebooting the system. For details refer to:
 356           Documentation/acpi/method-customizing.txt.
 357
 358           NOTE: This option is security sensitive, because it allows arbitrary
 359           kernel memory to be written to by root (uid=0) users, allowing them
 360           to bypass certain security measures (e.g. if root is not allowed to
 361           load additional kernel modules after boot, this feature may be used
 362           to override that restriction).
 363
 364 config ACPI_BGRT
 365         bool "Boottime Graphics Resource Table support"
 366         depends on EFI && X86
 367         help
 368           This driver adds support for exposing the ACPI Boottime Graphics
 369           Resource Table, which allows the operating system to obtain
 370           data from the firmware boot splash. It will appear under
 371           /sys/firmware/acpi/bgrt/ .
 372
 373 source "drivers/acpi/apei/Kconfig"
 374
 375 endif   # ACPI