drivers/acpi/Kconfig

   1 # SPDX-License-Identifier: GPL-2.0
   2 #
   3 # ACPI Configuration
   4 #
   5
   6 config ARCH_SUPPORTS_ACPI
   7         bool
   8
   9 menuconfig ACPI
  10         bool "ACPI (Advanced Configuration and Power Interface) Support"
  11         depends on ARCH_SUPPORTS_ACPI
  12         select PNP
  13         default y if X86
  14         help
  15           Advanced Configuration and Power Interface (ACPI) support for
  16           Linux requires an ACPI-compliant platform (hardware/firmware),
  17           and assumes the presence of OS-directed configuration and power
  18           management (OSPM) software.  This option will enlarge your
  19           kernel by about 70K.
  20
  21           Linux ACPI provides a robust functional replacement for several
  22           legacy configuration and power management interfaces, including
  23           the Plug-and-Play BIOS specification (PnP BIOS), the
  24           MultiProcessor Specification (MPS), and the Advanced Power
  25           Management (APM) specification.  If both ACPI and APM support
  26           are configured, ACPI is used.
  27
  28           The project home page for the Linux ACPI subsystem is here:
  29           <https://01.org/linux-acpi>
  30
  31           Linux support for ACPI is based on Intel Corporation's ACPI
  32           Component Architecture (ACPI CA).  For more information on the
  33           ACPI CA, see:
  34           <http://acpica.org/>
  35
  36           ACPI is an open industry specification originally co-developed by
  37           Hewlett-Packard, Intel, Microsoft, Phoenix, and Toshiba. Currently,
  38           it is developed by the ACPI Specification Working Group (ASWG) under
  39           the UEFI Forum and any UEFI member can join the ASWG and contribute
  40           to the ACPI specification.
  41           The specification is available at:
  42           <http://www.acpi.info>
  43           <http://www.uefi.org/acpi/specs>
  44
  45 if ACPI
  46
  47 config ACPI_LEGACY_TABLES_LOOKUP
  48         bool
  49
  50 config ARCH_MIGHT_HAVE_ACPI_PDC
  51         bool
  52
  53 config ACPI_GENERIC_GSI
  54         bool
  55
  56 config ACPI_SYSTEM_POWER_STATES_SUPPORT
  57         bool
  58
  59 config ACPI_CCA_REQUIRED
  60         bool
  61
  62 config ACPI_DEBUGGER
  63         bool "AML debugger interface"
  64         select ACPI_DEBUG
  65         help
  66           Enable in-kernel debugging of AML facilities: statistics,
  67           internal object dump, single step control method execution.
  68           This is still under development, currently enabling this only
  69           results in the compilation of the ACPICA debugger files.
  70
  71 if ACPI_DEBUGGER
  72
  73 config ACPI_DEBUGGER_USER
  74         tristate "Userspace debugger accessiblity"
  75         depends on DEBUG_FS
  76         help
  77           Export /sys/kernel/debug/acpi/acpidbg for userspace utilities
  78           to access the debugger functionalities.
  79
  80 endif
  81
  82 config ACPI_SPCR_TABLE
  83         bool "ACPI Serial Port Console Redirection Support"
  84         default y if X86
  85         help
  86           Enable support for Serial Port Console Redirection (SPCR) Table.
  87           This table provides information about the configuration of the
  88           earlycon console.
  89
  90 config ACPI_LPIT
  91         bool
  92         depends on X86_64
  93         default y
  94
  95 config ACPI_SLEEP
  96         bool
  97         depends on SUSPEND || HIBERNATION
  98         depends on ACPI_SYSTEM_POWER_STATES_SUPPORT
  99         default y
 100
 101 config ACPI_PROCFS_POWER
 102         bool "Deprecated power /proc/acpi directories"
 103         depends on X86 && PROC_FS
 104         help
 105           For backwards compatibility, this option allows
 106           deprecated power /proc/acpi/ directories to exist, even when
 107           they have been replaced by functions in /sys.
 108           The deprecated directories (and their replacements) include:
 109           /proc/acpi/battery/* (/sys/class/power_supply/*) and
 110           /proc/acpi/ac_adapter/* (sys/class/power_supply/*).
 111           This option has no effect on /proc/acpi/ directories
 112           and functions which do not yet exist in /sys.
 113           This option, together with the proc directories, will be
 114           deleted in the future.
 115
 116           Say N to delete power /proc/acpi/ directories that have moved to /sys.
 117
 118 config ACPI_REV_OVERRIDE_POSSIBLE
 119         bool "Allow supported ACPI revision to be overridden"
 120         depends on X86
 121         default y
 122         help
 123           The platform firmware on some systems expects Linux to return "5" as
 124           the supported ACPI revision which makes it expose system configuration
 125           information in a special way.
 126
 127           For example, based on what ACPI exports as the supported revision,
 128           Dell XPS 13 (2015) configures its audio device to either work in HDA
 129           mode or in I2S mode, where the former is supposed to be used on Linux
 130           until the latter is fully supported (in the kernel as well as in user
 131           space).
 132
 133           This option enables a DMI-based quirk for the above Dell machine (so
 134           that HDA audio is exposed by the platform firmware to the kernel) and
 135           makes it possible to force the kernel to return "5" as the supported
 136           ACPI revision via the "acpi_rev_override" command line switch.
 137
 138 config ACPI_EC_DEBUGFS
 139         tristate "EC read/write access through /sys/kernel/debug/ec"
 140         help
 141           Say N to disable Embedded Controller /sys/kernel/debug interface
 142
 143           Be aware that using this interface can confuse your Embedded
 144           Controller in a way that a normal reboot is not enough. You then
 145           have to power off your system, and remove the laptop battery for
 146           some seconds.
 147           An Embedded Controller typically is available on laptops and reads
 148           sensor values like battery state and temperature.
 149           The kernel accesses the EC through ACPI parsed code provided by BIOS
 150           tables. This option allows to access the EC directly without ACPI
 151           code being involved.
 152           Thus this option is a debug option that helps to write ACPI drivers
 153           and can be used to identify ACPI code or EC firmware bugs.
 154
 155 config ACPI_AC
 156         tristate "AC Adapter"
 157         depends on X86
 158         select POWER_SUPPLY
 159         default y
 160         help
 161           This driver supports the AC Adapter object, which indicates
 162           whether a system is on AC or not.  If you have a system that can
 163           switch between A/C and battery, say Y.
 164
 165           To compile this driver as a module, choose M here:
 166           the module will be called ac.
 167
 168 config ACPI_BATTERY
 169         tristate "Battery"
 170         depends on X86
 171         select POWER_SUPPLY
 172         default y
 173         help
 174           This driver adds support for battery information through
 175           /proc/acpi/battery. If you have a mobile system with a battery,
 176           say Y.
 177
 178           To compile this driver as a module, choose M here:
 179           the module will be called battery.
 180
 181 config ACPI_BUTTON
 182         tristate "Button"
 183         depends on INPUT
 184         default y
 185         help
 186           This driver handles events on the power, sleep, and lid buttons.
 187           A daemon reads events from input devices or via netlink and
 188           performs user-defined actions such as shutting down the system.
 189           This is necessary for software-controlled poweroff.
 190
 191           To compile this driver as a module, choose M here:
 192           the module will be called button.
 193
 194 config ACPI_VIDEO
 195         tristate "Video"
 196         depends on X86 && BACKLIGHT_CLASS_DEVICE
 197         depends on INPUT
 198         select THERMAL
 199         help
 200           This driver implements the ACPI Extensions For Display Adapters
 201           for integrated graphics devices on motherboard, as specified in
 202           ACPI 2.0 Specification, Appendix B.  This supports basic operations
 203           such as defining the video POST device, retrieving EDID information,
 204           and setting up a video output.
 205
 206           To compile this driver as a module, choose M here:
 207           the module will be called video.
 208
 209 config ACPI_FAN
 210         tristate "Fan"
 211         depends on THERMAL
 212         default y
 213         help
 214           This driver supports ACPI fan devices, allowing user-mode
 215           applications to perform basic fan control (on, off, status).
 216
 217           To compile this driver as a module, choose M here:
 218           the module will be called fan.
 219
 220 config ACPI_TAD
 221         tristate "ACPI Time and Alarm (TAD) Device Support"
 222         depends on SYSFS && PM_SLEEP
 223         help
 224           The ACPI Time and Alarm (TAD) device is an alternative to the Real
 225           Time Clock (RTC).  Its wake timers allow the system to transition from
 226           the S3 (or optionally S4/S5) state to S0 state after a time period
 227           elapses.  In comparison with the RTC Alarm, the TAD provides a larger
 228           scale of flexibility in the wake timers.  The time capabilities of the
 229           TAD maintain the time of day information across platform power
 230           transitions, and keep track of time even when the platform is turned
 231           off.
 232
 233 config ACPI_DOCK
 234         bool "Dock"
 235         help
 236           This driver supports ACPI-controlled docking stations and removable
 237           drive bays such as the IBM Ultrabay and the Dell Module Bay.
 238
 239 config ACPI_CPU_FREQ_PSS
 240         bool
 241         select THERMAL
 242
 243 config ACPI_PROCESSOR_CSTATE
 244         def_bool y
 245         depends on IA64 || X86
 246
 247 config ACPI_PROCESSOR_IDLE
 248         bool
 249         select CPU_IDLE
 250
 251 config ACPI_MCFG
 252         bool
 253
 254 config ACPI_CPPC_LIB
 255         bool
 256         depends on ACPI_PROCESSOR
 257         select MAILBOX
 258         select PCC
 259         help
 260           If this option is enabled, this file implements common functionality
 261           to parse CPPC tables as described in the ACPI 5.1+ spec. The
 262           routines implemented are meant to be used by other
 263           drivers to control CPU performance using CPPC semantics.
 264           If your platform does not support CPPC in firmware,
 265           leave this option disabled.
 266
 267 config ACPI_PROCESSOR
 268         tristate "Processor"
 269         depends on X86 || IA64 || ARM64
 270         select ACPI_PROCESSOR_IDLE
 271         select ACPI_CPU_FREQ_PSS if X86 || IA64
 272         default y
 273         help
 274           This driver adds support for the ACPI Processor package. It is required
 275           by several flavors of cpufreq performance-state, thermal, throttling and
 276           idle drivers.
 277
 278           To compile this driver as a module, choose M here:
 279           the module will be called processor.
 280
 281 config ACPI_IPMI
 282         tristate "IPMI"
 283         depends on IPMI_HANDLER
 284         help
 285           This driver enables the ACPI to access the BMC controller. And it
 286           uses the IPMI request/response message to communicate with BMC
 287           controller, which can be found on on the server.
 288
 289           To compile this driver as a module, choose M here:
 290           the module will be called as acpi_ipmi.
 291
 292 config ACPI_HOTPLUG_CPU
 293         bool
 294         depends on ACPI_PROCESSOR && HOTPLUG_CPU
 295         select ACPI_CONTAINER
 296         default y
 297
 298 config ACPI_PROCESSOR_AGGREGATOR
 299         tristate "Processor Aggregator"
 300         depends on ACPI_PROCESSOR
 301         depends on X86
 302         help
 303           ACPI 4.0 defines processor Aggregator, which enables OS to perform
 304           specific processor configuration and control that applies to all
 305           processors in the platform. Currently only logical processor idling
 306           is defined, which is to reduce power consumption. This driver
 307           supports the new device.
 308
 309 config ACPI_THERMAL
 310         tristate "Thermal Zone"
 311         depends on ACPI_PROCESSOR
 312         select THERMAL
 313         default y
 314         help
 315           This driver supports ACPI thermal zones.  Most mobile and
 316           some desktop systems support ACPI thermal zones.  It is HIGHLY
 317           recommended that this option be enabled, as your processor(s)
 318           may be damaged without it.
 319
 320           To compile this driver as a module, choose M here:
 321           the module will be called thermal.
 322
 323 config ACPI_NUMA
 324         bool "NUMA support"
 325         depends on NUMA
 326         depends on (X86 || IA64 || ARM64)
 327         default y if IA64_GENERIC || IA64_SGI_SN2 || ARM64
 328
 329 config ACPI_CUSTOM_DSDT_FILE
 330         string "Custom DSDT Table file to include"
 331         default ""
 332         depends on !STANDALONE
 333         help
 334           This option supports a custom DSDT by linking it into the kernel.
 335           See Documentation/acpi/dsdt-override.txt
 336
 337           Enter the full path name to the file which includes the AmlCode
 338           or dsdt_aml_code declaration.
 339
 340           If unsure, don't enter a file name.
 341
 342 config ACPI_CUSTOM_DSDT
 343         bool
 344         default ACPI_CUSTOM_DSDT_FILE != ""
 345
 346 config ARCH_HAS_ACPI_TABLE_UPGRADE
 347         def_bool n
 348
 349 config ACPI_TABLE_UPGRADE
 350         bool "Allow upgrading ACPI tables via initrd"
 351         depends on BLK_DEV_INITRD && ARCH_HAS_ACPI_TABLE_UPGRADE
 352         default y
 353         help
 354           This option provides functionality to upgrade arbitrary ACPI tables
 355           via initrd. No functional change if no ACPI tables are passed via
 356           initrd, therefore it's safe to say Y.
 357           See Documentation/acpi/initrd_table_override.txt for details
 358
 359 config ACPI_DEBUG
 360         bool "Debug Statements"
 361         help
 362           The ACPI subsystem can produce debug output.  Saying Y enables this
 363           output and increases the kernel size by around 50K.
 364
 365           Use the acpi.debug_layer and acpi.debug_level kernel command-line
 366           parameters documented in Documentation/acpi/debug.txt and
 367           Documentation/admin-guide/kernel-parameters.rst to control the type and
 368           amount of debug output.
 369
 370 config ACPI_PCI_SLOT
 371         bool "PCI slot detection driver"
 372         depends on SYSFS && PCI
 373         help
 374           This driver creates entries in /sys/bus/pci/slots/ for all PCI
 375           slots in the system.  This can help correlate PCI bus addresses,
 376           i.e., segment/bus/device/function tuples, with physical slots in
 377           the system.  If you are unsure, say N.
 378
 379 config ACPI_CONTAINER
 380         bool "Container and Module Devices"
 381         default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU)
 382         help
 383           This driver supports ACPI Container and Module devices (IDs
 384           ACPI0004, PNP0A05, and PNP0A06).
 385
 386           This helps support hotplug of nodes, CPUs, and memory.
 387
 388           To compile this driver as a module, choose M here:
 389           the module will be called container.
 390
 391 config ACPI_HOTPLUG_MEMORY
 392         bool "Memory Hotplug"
 393         depends on MEMORY_HOTPLUG
 394         help
 395           This driver supports ACPI memory hotplug.  The driver
 396           fields notifications on ACPI memory devices (PNP0C80),
 397           which represent memory ranges that may be onlined or
 398           offlined during runtime.
 399
 400           If your hardware and firmware do not support adding or
 401           removing memory devices at runtime, you need not enable
 402           this driver.
 403
 404           To compile this driver as a module, choose M here:
 405           the module will be called acpi_memhotplug.
 406
 407 config ACPI_HOTPLUG_IOAPIC
 408         bool
 409         depends on PCI
 410         depends on X86_IO_APIC
 411         default y
 412
 413 config ACPI_SBS
 414         tristate "Smart Battery System"
 415         depends on X86
 416         select POWER_SUPPLY
 417         help
 418           This driver supports the Smart Battery System, another
 419           type of access to battery information, found on some laptops.
 420
 421           To compile this driver as a module, choose M here:
 422           the modules will be called sbs and sbshc.
 423
 424 config ACPI_HED
 425         tristate "Hardware Error Device"
 426         help
 427           This driver supports the Hardware Error Device (PNP0C33),
 428           which is used to report some hardware errors notified via
 429           SCI, mainly the corrected errors.
 430
 431 config ACPI_CUSTOM_METHOD
 432         tristate "Allow ACPI methods to be inserted/replaced at run time"
 433         depends on DEBUG_FS
 434         help
 435           This debug facility allows ACPI AML methods to be inserted and/or
 436           replaced without rebooting the system. For details refer to:
 437           Documentation/acpi/method-customizing.txt.
 438
 439           NOTE: This option is security sensitive, because it allows arbitrary
 440           kernel memory to be written to by root (uid=0) users, allowing them
 441           to bypass certain security measures (e.g. if root is not allowed to
 442           load additional kernel modules after boot, this feature may be used
 443           to override that restriction).
 444
 445 config ACPI_BGRT
 446         bool "Boottime Graphics Resource Table support"
 447         depends on EFI && (X86 || ARM64)
 448         help
 449           This driver adds support for exposing the ACPI Boottime Graphics
 450           Resource Table, which allows the operating system to obtain
 451           data from the firmware boot splash. It will appear under
 452           /sys/firmware/acpi/bgrt/ .
 453
 454 config ACPI_REDUCED_HARDWARE_ONLY
 455         bool "Hardware-reduced ACPI support only" if EXPERT
 456         def_bool n
 457         help
 458           This config item changes the way the ACPI code is built.  When this
 459           option is selected, the kernel will use a specialized version of
 460           ACPICA that ONLY supports the ACPI "reduced hardware" mode.  The
 461           resulting kernel will be smaller but it will also be restricted to
 462           running in ACPI reduced hardware mode ONLY.
 463
 464           If you are unsure what to do, do not enable this option.
 465
 466 source "drivers/acpi/nfit/Kconfig"
 467
 468 source "drivers/acpi/apei/Kconfig"
 469 source "drivers/acpi/dptf/Kconfig"
 470
 471 config ACPI_WATCHDOG
 472         bool
 473
 474 config ACPI_EXTLOG
 475         tristate "Extended Error Log support"
 476         depends on X86_MCE && X86_LOCAL_APIC && EDAC
 477         select UEFI_CPER
 478         help
 479           Certain usages such as Predictive Failure Analysis (PFA) require
 480           more information about the error than what can be described in
 481           processor machine check banks. Most server processors log
 482           additional information about the error in processor uncore
 483           registers. Since the addresses and layout of these registers vary
 484           widely from one processor to another, system software cannot
 485           readily make use of them. To complicate matters further, some of
 486           the additional error information cannot be constructed without
 487           detailed knowledge about platform topology.
 488
 489           Enhanced MCA Logging allows firmware to provide additional error
 490           information to system software, synchronous with MCE or CMCI. This
 491           driver adds support for that functionality with corresponding
 492           tracepoint which carries that information to userspace.
 493
 494 config ACPI_ADXL
 495         bool
 496
 497 menuconfig PMIC_OPREGION
 498         bool "PMIC (Power Management Integrated Circuit) operation region support"
 499         help
 500           Select this option to enable support for ACPI operation
 501           region of the PMIC chip. The operation region can be used
 502           to control power rails and sensor reading/writing on the
 503           PMIC chip.
 504
 505 if PMIC_OPREGION
 506 config CRC_PMIC_OPREGION
 507         bool "ACPI operation region support for CrystalCove PMIC"
 508         depends on INTEL_SOC_PMIC
 509         help
 510           This config adds ACPI operation region support for CrystalCove PMIC.
 511
 512 config XPOWER_PMIC_OPREGION
 513         bool "ACPI operation region support for XPower AXP288 PMIC"
 514         depends on MFD_AXP20X_I2C && IOSF_MBI=y
 515         help
 516           This config adds ACPI operation region support for XPower AXP288 PMIC.
 517
 518 config BXT_WC_PMIC_OPREGION
 519         bool "ACPI operation region support for BXT WhiskeyCove PMIC"
 520         depends on INTEL_SOC_PMIC_BXTWC
 521         help
 522           This config adds ACPI operation region support for BXT WhiskeyCove PMIC.
 523
 524 config CHT_WC_PMIC_OPREGION
 525         bool "ACPI operation region support for CHT Whiskey Cove PMIC"
 526         depends on INTEL_SOC_PMIC_CHTWC
 527         help
 528           This config adds ACPI operation region support for CHT Whiskey Cove PMIC.
 529
 530 config CHT_DC_TI_PMIC_OPREGION
 531         bool "ACPI operation region support for Dollar Cove TI PMIC"
 532         depends on INTEL_SOC_PMIC_CHTDC_TI
 533         help
 534           This config adds ACPI operation region support for Dollar Cove TI PMIC.
 535
 536 endif
 537
 538 config ACPI_CONFIGFS
 539         tristate "ACPI configfs support"
 540         select CONFIGFS_FS
 541         help
 542           Select this option to enable support for ACPI configuration from
 543           userspace. The configurable ACPI groups will be visible under
 544           /config/acpi, assuming configfs is mounted under /config.
 545
 546 if ARM64
 547 source "drivers/acpi/arm64/Kconfig"
 548
 549 config ACPI_PPTT
 550         bool
 551 endif
 552
 553 config TPS68470_PMIC_OPREGION
 554         bool "ACPI operation region support for TPS68470 PMIC"
 555         depends on MFD_TPS68470
 556         help
 557           This config adds ACPI operation region support for TI TPS68470 PMIC.
 558           TPS68470 device is an advanced power management unit that powers
 559           a Compact Camera Module (CCM), generates clocks for image sensors,
 560           drives a dual LED for flash and incorporates two LED drivers for
 561           general purpose indicators.
 562           This driver enables ACPI operation region support control voltage
 563           regulators and clocks.
 564
 565           This option is a bool as it provides an ACPI operation
 566           region, which must be available before any of the devices
 567           using this, are probed.
 568
 569 endif   # ACPI
 570
 571 config X86_PM_TIMER
 572         bool "Power Management Timer Support" if EXPERT
 573         depends on X86 && (ACPI || JAILHOUSE_GUEST)
 574         default y
 575         help
 576           The Power Management Timer is available on all ACPI-capable,
 577           in most cases even if ACPI is unusable or blacklisted.
 578
 579           This timing source is not affected by power management features
 580           like aggressive processor idling, throttling, frequency and/or
 581           voltage scaling, unlike the commonly used Time Stamp Counter
 582           (TSC) timing source.
 583
 584           You should nearly always say Y here because many modern
 585           systems require this timer.