2# ACPI Configuration
   5menuconfig 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.
  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.
  26          The project home page for the Linux ACPI subsystem is here:
  27          <>
  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          <>
  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          <>
  39if ACPI
  41config ACPI_SLEEP
  42        bool
  43        depends on SUSPEND || HIBERNATION
  44        default y
  46config 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  52          they have been replaced by functions in /sys.
  54          This option has no effect on /proc/acpi/ files
  55          and functions which do not yet exist in /sys.
  57          Say N to delete /proc/acpi/ files that have moved to /sys/
  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  65          they have been replaced by functions in /sys.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.
  74          Say N to delete power /proc/acpi/ directories that have moved to /sys/
  76config 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
  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.
  94config 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.
 104          To compile this driver as a module, choose M here:
 105          the module will be called ac.
 107config 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.
 117          To compile this driver as a module, choose M here:
 118          the module will be called battery.
 120config 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.
 130          To compile this driver as a module, choose M here:
 131          the module will be called button.
 133config ACPI_VIDEO
 134        tristate "Video"
 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.
 145          To compile this driver as a module, choose M here:
 146          the module will be called video.
 148config 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).
 156          To compile this driver as a module, choose M here:
 157          the module will be called fan.
 159config 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.
 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.
 176          To compile this driver as a module, choose M here:
 177          the module will be called processor.
 178config 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.
 187          To compile this driver as a module, choose M here:
 188          the module will be called as acpi_ipmi.
 191        bool
 192        depends on ACPI_PROCESSOR && HOTPLUG_CPU
 193        select ACPI_CONTAINER
 194        default y
 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.
 207config 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.
 218          To compile this driver as a module, choose M here:
 219          the module will be called thermal.
 221config ACPI_NUMA
 222        bool "NUMA support"
 223        depends on NUMA
 224        depends on (X86 || IA64)
 225        default y if IA64_GENERIC || IA64_SGI_SN2
 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
 235          Enter the full path name to the file which includes the AmlCode
 236          declaration.
 238          If unsure, don't enter a file name.
 241        bool
 242        default ACPI_CUSTOM_DSDT_FILE != ""
 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
 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.
 262          Enter 0 to disable this mechanism and allow ACPI to
 263          run by default no matter what the year.  (default)
 265config 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.
 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.
 277config 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.
 287config 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.
 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.
 300          You should nearly always say Y here because many modern
 301          systems require this timer. 
 304        bool "Container and Module Devices"
 306        help
 307          This driver supports ACPI Container and Module devices (IDs
 308          ACPI0004, PNP0A05, and PNP0A06).
 310          This helps support hotplug of nodes, CPUs, and memory.
 312          To compile this driver as a module, choose M here:
 313          the module will be called container.
 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.
 324          If your hardware and firmware do not support adding or
 325          removing memory devices at runtime, you need not enable
 326          this driver.
 328          To compile this driver as a module, choose M here:
 329          the module will be called acpi_memhotplug.
 331config 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.
 339          To compile this driver as a module, choose M here:
 340          the modules will be called sbs and sbshc.
 342config 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.
 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.
 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).
 364config 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/ .
 373source "drivers/acpi/apei/Kconfig"
 375endif   # ACPI
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