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  52           they have been replaced by functions in /sys.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_EC_DEBUGFS
  60         tristate "EC read/write access through /sys/kernel/debug/ec"
  61         default n
  62         help
  63           Say N to disable Embedded Controller /sys/kernel/debug interface
  64
  65           Be aware that using this interface can confuse your Embedded
  66           Controller in a way that a normal reboot is not enough. You then
  67           have to power off your system, and remove the laptop battery for
  68           some seconds.
  69           An Embedded Controller typically is available on laptops and reads
  70           sensor values like battery state and temperature.
  71           The kernel accesses the EC through ACPI parsed code provided by BIOS
  72           tables. This option allows to access the EC directly without ACPI
  73           code being involved.
  74           Thus this option is a debug option that helps to write ACPI drivers
  75           and can be used to identify ACPI code or EC firmware bugs.
  76
  77 config ACPI_AC
  78         tristate "AC Adapter"
  79         depends on X86
  80         select POWER_SUPPLY
  81         default y
  82         help
  83           This driver supports the AC Adapter object, which indicates
  84           whether a system is on AC or not.  If you have a system that can
  85           switch between A/C and battery, say Y.
  86
  87           To compile this driver as a module, choose M here:
  88           the module will be called ac.
  89
  90 config ACPI_BATTERY
  91         tristate "Battery"
  92         depends on X86
  93         select POWER_SUPPLY
  94         default y
  95         help
  96           This driver adds support for battery information through
  97           /proc/acpi/battery. If you have a mobile system with a battery,
  98           say Y.
  99
 100           To compile this driver as a module, choose M here:
 101           the module will be called battery.
 102
 103 config ACPI_BUTTON
 104         tristate "Button"
 105         depends on INPUT
 106         default y
 107         help
 108           This driver handles events on the power, sleep, and lid buttons.
 109           A daemon reads events from input devices or via netlink and
 110           performs user-defined actions such as shutting down the system.
 111           This is necessary for software-controlled poweroff.
 112
 113           To compile this driver as a module, choose M here:
 114           the module will be called button.
 115
 116 config ACPI_VIDEO
 117         tristate "Video"
 118         depends on X86 && BACKLIGHT_CLASS_DEVICE && VIDEO_OUTPUT_CONTROL
 119         depends on INPUT
 120         select THERMAL
 121         help
 122           This driver implements the ACPI Extensions For Display Adapters
 123           for integrated graphics devices on motherboard, as specified in
 124           ACPI 2.0 Specification, Appendix B.  This supports basic operations
 125           such as defining the video POST device, retrieving EDID information,
 126           and setting up a video output.
 127
 128           To compile this driver as a module, choose M here:
 129           the module will be called video.
 130
 131 config ACPI_FAN
 132         tristate "Fan"
 133         select THERMAL
 134         default y
 135         help
 136           This driver supports ACPI fan devices, allowing user-mode
 137           applications to perform basic fan control (on, off, status).
 138
 139           To compile this driver as a module, choose M here:
 140           the module will be called fan.
 141
 142 config ACPI_DOCK
 143         bool "Dock"
 144         help
 145           This driver supports ACPI-controlled docking stations and removable
 146           drive bays such as the IBM Ultrabay and the Dell Module Bay.
 147
 148 config ACPI_PROCESSOR
 149         tristate "Processor"
 150         select THERMAL
 151         select CPU_IDLE
 152         default y
 153         help
 154           This driver installs ACPI as the idle handler for Linux and uses
 155           ACPI C2 and C3 processor states to save power on systems that
 156           support it.  It is required by several flavors of cpufreq
 157           performance-state drivers.
 158
 159           To compile this driver as a module, choose M here:
 160           the module will be called processor.
 161
 162 config ACPI_IPMI
 163         tristate "IPMI"
 164         depends on IPMI_SI
 165         default n
 166         help
 167           This driver enables the ACPI to access the BMC controller. And it
 168           uses the IPMI request/response message to communicate with BMC
 169           controller, which can be found on on the server.
 170
 171           To compile this driver as a module, choose M here:
 172           the module will be called as acpi_ipmi.
 173
 174 config ACPI_HOTPLUG_CPU
 175         bool
 176         depends on ACPI_PROCESSOR && HOTPLUG_CPU
 177         select ACPI_CONTAINER
 178         default y
 179
 180 config ACPI_PROCESSOR_AGGREGATOR
 181         tristate "Processor Aggregator"
 182         depends on ACPI_PROCESSOR
 183         depends on X86
 184         help
 185           ACPI 4.0 defines processor Aggregator, which enables OS to perform
 186           specific processor configuration and control that applies to all
 187           processors in the platform. Currently only logical processor idling
 188           is defined, which is to reduce power consumption. This driver
 189           supports the new device.
 190
 191 config ACPI_THERMAL
 192         tristate "Thermal Zone"
 193         depends on ACPI_PROCESSOR
 194         select THERMAL
 195         default y
 196         help
 197           This driver supports ACPI thermal zones.  Most mobile and
 198           some desktop systems support ACPI thermal zones.  It is HIGHLY
 199           recommended that this option be enabled, as your processor(s)
 200           may be damaged without it.
 201
 202           To compile this driver as a module, choose M here:
 203           the module will be called thermal.
 204
 205 config ACPI_NUMA
 206         bool "NUMA support"
 207         depends on NUMA
 208         depends on (X86 || IA64)
 209         default y if IA64_GENERIC || IA64_SGI_SN2
 210
 211 config ACPI_CUSTOM_DSDT_FILE
 212         string "Custom DSDT Table file to include"
 213         default ""
 214         depends on !STANDALONE
 215         help
 216           This option supports a custom DSDT by linking it into the kernel.
 217           See Documentation/acpi/dsdt-override.txt
 218
 219           Enter the full path name to the file which includes the AmlCode
 220           declaration.
 221
 222           If unsure, don't enter a file name.
 223
 224 config ACPI_CUSTOM_DSDT
 225         bool
 226         default ACPI_CUSTOM_DSDT_FILE != ""
 227
 228 config ACPI_INITRD_TABLE_OVERRIDE
 229         bool "ACPI tables override via initrd"
 230         depends on BLK_DEV_INITRD && X86
 231         default n
 232         help
 233           This option provides functionality to override arbitrary ACPI tables
 234           via initrd. No functional change if no ACPI tables are passed via
 235           initrd, therefore it's safe to say Y.
 236           See Documentation/acpi/initrd_table_override.txt for details
 237
 238 config ACPI_DEBUG
 239         bool "Debug Statements"
 240         default n
 241         help
 242           The ACPI subsystem can produce debug output.  Saying Y enables this
 243           output and increases the kernel size by around 50K.
 244
 245           Use the acpi.debug_layer and acpi.debug_level kernel command-line
 246           parameters documented in Documentation/acpi/debug.txt and
 247           Documentation/kernel-parameters.txt to control the type and
 248           amount of debug output.
 249
 250 config ACPI_PCI_SLOT
 251         bool "PCI slot detection driver"
 252         depends on SYSFS
 253         default n
 254         help
 255           This driver creates entries in /sys/bus/pci/slots/ for all PCI
 256           slots in the system.  This can help correlate PCI bus addresses,
 257           i.e., segment/bus/device/function tuples, with physical slots in
 258           the system.  If you are unsure, say N.
 259
 260 config X86_PM_TIMER
 261         bool "Power Management Timer Support" if EXPERT
 262         depends on X86
 263         default y
 264         help
 265           The Power Management Timer is available on all ACPI-capable,
 266           in most cases even if ACPI is unusable or blacklisted.
 267
 268           This timing source is not affected by power management features
 269           like aggressive processor idling, throttling, frequency and/or
 270           voltage scaling, unlike the commonly used Time Stamp Counter
 271           (TSC) timing source.
 272
 273           You should nearly always say Y here because many modern
 274           systems require this timer.
 275
 276 config ACPI_CONTAINER
 277         bool "Container and Module Devices"
 278         default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU)
 279         help
 280           This driver supports ACPI Container and Module devices (IDs
 281           ACPI0004, PNP0A05, and PNP0A06).
 282
 283           This helps support hotplug of nodes, CPUs, and memory.
 284
 285           To compile this driver as a module, choose M here:
 286           the module will be called container.
 287
 288 config ACPI_HOTPLUG_MEMORY
 289         bool "Memory Hotplug"
 290         depends on MEMORY_HOTPLUG
 291         help
 292           This driver supports ACPI memory hotplug.  The driver
 293           fields notifications on ACPI memory devices (PNP0C80),
 294           which represent memory ranges that may be onlined or
 295           offlined during runtime.
 296
 297           If your hardware and firmware do not support adding or
 298           removing memory devices at runtime, you need not enable
 299           this driver.
 300
 301           To compile this driver as a module, choose M here:
 302           the module will be called acpi_memhotplug.
 303
 304 config ACPI_SBS
 305         tristate "Smart Battery System"
 306         depends on X86
 307         select POWER_SUPPLY
 308         help
 309           This driver supports the Smart Battery System, another
 310           type of access to battery information, found on some laptops.
 311
 312           To compile this driver as a module, choose M here:
 313           the modules will be called sbs and sbshc.
 314
 315 config ACPI_HED
 316         tristate "Hardware Error Device"
 317         help
 318           This driver supports the Hardware Error Device (PNP0C33),
 319           which is used to report some hardware errors notified via
 320           SCI, mainly the corrected errors.
 321
 322 config ACPI_CUSTOM_METHOD
 323         tristate "Allow ACPI methods to be inserted/replaced at run time"
 324         depends on DEBUG_FS
 325         default n
 326         help
 327           This debug facility allows ACPI AML methods to be inserted and/or
 328           replaced without rebooting the system. For details refer to:
 329           Documentation/acpi/method-customizing.txt.
 330
 331           NOTE: This option is security sensitive, because it allows arbitrary
 332           kernel memory to be written to by root (uid=0) users, allowing them
 333           to bypass certain security measures (e.g. if root is not allowed to
 334           load additional kernel modules after boot, this feature may be used
 335           to override that restriction).
 336
 337 config ACPI_BGRT
 338         bool "Boottime Graphics Resource Table support"
 339         depends on EFI && X86
 340         help
 341           This driver adds support for exposing the ACPI Boottime Graphics
 342           Resource Table, which allows the operating system to obtain
 343           data from the firmware boot splash. It will appear under
 344           /sys/firmware/acpi/bgrt/ .
 345
 346 source "drivers/acpi/apei/Kconfig"
 347
 348 config ACPI_EXTLOG
 349         tristate "Extended Error Log support"
 350         depends on X86_MCE && X86_LOCAL_APIC
 351         select UEFI_CPER
 352         default n
 353         help
 354           Certain usages such as Predictive Failure Analysis (PFA) require
 355           more information about the error than what can be described in
 356           processor machine check banks. Most server processors log
 357           additional information about the error in processor uncore
 358           registers. Since the addresses and layout of these registers vary
 359           widely from one processor to another, system software cannot
 360           readily make use of them. To complicate matters further, some of
 361           the additional error information cannot be constructed without
 362           detailed knowledge about platform topology.
 363
 364           Enhanced MCA Logging allows firmware to provide additional error
 365           information to system software, synchronous with MCE or CMCI. This
 366           driver adds support for that functionality.
 367
 368 endif   # ACPI