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         select NLS
  14         default y if X86
  15         help
  16           Advanced Configuration and Power Interface (ACPI) support for
  17           Linux requires an ACPI-compliant platform (hardware/firmware),
  18           and assumes the presence of OS-directed configuration and power
  19           management (OSPM) software.  This option will enlarge your
  20           kernel by about 70K.
  21
  22           Linux ACPI provides a robust functional replacement for several
  23           legacy configuration and power management interfaces, including
  24           the Plug-and-Play BIOS specification (PnP BIOS), the
  25           MultiProcessor Specification (MPS), and the Advanced Power
  26           Management (APM) specification.  If both ACPI and APM support
  27           are configured, ACPI is used.
  28
  29           The project home page for the Linux ACPI subsystem is here:
  30           <https://01.org/linux-acpi>
  31
  32           Linux support for ACPI is based on Intel Corporation's ACPI
  33           Component Architecture (ACPI CA).  For more information on the
  34           ACPI CA, see:
  35           <http://acpica.org/>
  36
  37           ACPI is an open industry specification originally co-developed by
  38           Hewlett-Packard, Intel, Microsoft, Phoenix, and Toshiba. Currently,
  39           it is developed by the ACPI Specification Working Group (ASWG) under
  40           the UEFI Forum and any UEFI member can join the ASWG and contribute
  41           to the ACPI specification.
  42           The specification is available at:
  43           <http://www.acpi.info>
  44           <http://www.uefi.org/acpi/specs>
  45
  46 if ACPI
  47
  48 config ACPI_LEGACY_TABLES_LOOKUP
  49         bool
  50
  51 config ARCH_MIGHT_HAVE_ACPI_PDC
  52         bool
  53
  54 config ACPI_GENERIC_GSI
  55         bool
  56
  57 config ACPI_SYSTEM_POWER_STATES_SUPPORT
  58         bool
  59
  60 config ACPI_CCA_REQUIRED
  61         bool
  62
  63 config ACPI_DEBUGGER
  64         bool "AML debugger interface"
  65         select ACPI_DEBUG
  66         help
  67           Enable in-kernel debugging of AML facilities: statistics,
  68           internal object dump, single step control method execution.
  69           This is still under development, currently enabling this only
  70           results in the compilation of the ACPICA debugger files.
  71
  72 if ACPI_DEBUGGER
  73
  74 config ACPI_DEBUGGER_USER
  75         tristate "Userspace debugger accessiblity"
  76         depends on DEBUG_FS
  77         help
  78           Export /sys/kernel/debug/acpi/acpidbg for userspace utilities
  79           to access the debugger functionalities.
  80
  81 endif
  82
  83 config ACPI_SPCR_TABLE
  84         bool "ACPI Serial Port Console Redirection Support"
  85         default y if X86
  86         help
  87           Enable support for Serial Port Console Redirection (SPCR) Table.
  88           This table provides information about the configuration of the
  89           earlycon console.
  90
  91 config ACPI_LPIT
  92         bool
  93         depends on X86_64
  94         default y
  95
  96 config ACPI_SLEEP
  97         bool
  98         depends on SUSPEND || HIBERNATION
  99         depends on ACPI_SYSTEM_POWER_STATES_SUPPORT
 100         default y
 101
 102 config ACPI_PROCFS_POWER
 103         bool "Deprecated power /proc/acpi directories"
 104         depends on X86 && PROC_FS
 105         help
 106           For backwards compatibility, this option allows
 107           deprecated power /proc/acpi/ directories to exist, even when
 108           they have been replaced by functions in /sys.
 109           The deprecated directories (and their replacements) include:
 110           /proc/acpi/battery/* (/sys/class/power_supply/*) and
 111           /proc/acpi/ac_adapter/* (sys/class/power_supply/*).
 112           This option has no effect on /proc/acpi/ directories
 113           and functions which do not yet exist in /sys.
 114           This option, together with the proc directories, will be
 115           deleted in the future.
 116
 117           Say N to delete power /proc/acpi/ directories that have moved to /sys.
 118
 119 config ACPI_REV_OVERRIDE_POSSIBLE
 120         bool "Allow supported ACPI revision to be overridden"
 121         depends on X86
 122         default y
 123         help
 124           The platform firmware on some systems expects Linux to return "5" as
 125           the supported ACPI revision which makes it expose system configuration
 126           information in a special way.
 127
 128           For example, based on what ACPI exports as the supported revision,
 129           Dell XPS 13 (2015) configures its audio device to either work in HDA
 130           mode or in I2S mode, where the former is supposed to be used on Linux
 131           until the latter is fully supported (in the kernel as well as in user
 132           space).
 133
 134           This option enables a DMI-based quirk for the above Dell machine (so
 135           that HDA audio is exposed by the platform firmware to the kernel) and
 136           makes it possible to force the kernel to return "5" as the supported
 137           ACPI revision via the "acpi_rev_override" command line switch.
 138
 139 config ACPI_EC_DEBUGFS
 140         tristate "EC read/write access through /sys/kernel/debug/ec"
 141         help
 142           Say N to disable Embedded Controller /sys/kernel/debug interface
 143
 144           Be aware that using this interface can confuse your Embedded
 145           Controller in a way that a normal reboot is not enough. You then
 146           have to power off your system, and remove the laptop battery for
 147           some seconds.
 148           An Embedded Controller typically is available on laptops and reads
 149           sensor values like battery state and temperature.
 150           The kernel accesses the EC through ACPI parsed code provided by BIOS
 151           tables. This option allows to access the EC directly without ACPI
 152           code being involved.
 153           Thus this option is a debug option that helps to write ACPI drivers
 154           and can be used to identify ACPI code or EC firmware bugs.
 155
 156 config ACPI_AC
 157         tristate "AC Adapter"
 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         select POWER_SUPPLY
 171         default y
 172         help
 173           This driver adds support for battery information through
 174           /proc/acpi/battery. If you have a mobile system with a battery,
 175           say Y.
 176
 177           To compile this driver as a module, choose M here:
 178           the module will be called battery.
 179
 180 config ACPI_BUTTON
 181         tristate "Button"
 182         depends on INPUT
 183         default y
 184         help
 185           This driver handles events on the power, sleep, and lid buttons.
 186           A daemon reads events from input devices or via netlink and
 187           performs user-defined actions such as shutting down the system.
 188           This is necessary for software-controlled poweroff.
 189
 190           To compile this driver as a module, choose M here:
 191           the module will be called button.
 192
 193 config ACPI_VIDEO
 194         tristate "Video"
 195         depends on X86 && BACKLIGHT_CLASS_DEVICE
 196         depends on INPUT
 197         select THERMAL
 198         help
 199           This driver implements the ACPI Extensions For Display Adapters
 200           for integrated graphics devices on motherboard, as specified in
 201           ACPI 2.0 Specification, Appendix B.  This supports basic operations
 202           such as defining the video POST device, retrieving EDID information,
 203           and setting up a video output.
 204
 205           To compile this driver as a module, choose M here:
 206           the module will be called video.
 207
 208 config ACPI_FAN
 209         tristate "Fan"
 210         depends on THERMAL
 211         default y
 212         help
 213           This driver supports ACPI fan devices, allowing user-mode
 214           applications to perform basic fan control (on, off, status).
 215
 216           To compile this driver as a module, choose M here:
 217           the module will be called fan.
 218
 219 config ACPI_TAD
 220         tristate "ACPI Time and Alarm (TAD) Device Support"
 221         depends on SYSFS && PM_SLEEP
 222         help
 223           The ACPI Time and Alarm (TAD) device is an alternative to the Real
 224           Time Clock (RTC).  Its wake timers allow the system to transition from
 225           the S3 (or optionally S4/S5) state to S0 state after a time period
 226           elapses.  In comparison with the RTC Alarm, the TAD provides a larger
 227           scale of flexibility in the wake timers.  The time capabilities of the
 228           TAD maintain the time of day information across platform power
 229           transitions, and keep track of time even when the platform is turned
 230           off.
 231
 232 config ACPI_DOCK
 233         bool "Dock"
 234         help
 235           This driver supports ACPI-controlled docking stations and removable
 236           drive bays such as the IBM Ultrabay and the Dell Module Bay.
 237
 238 config ACPI_CPU_FREQ_PSS
 239         bool
 240         select THERMAL
 241
 242 config ACPI_PROCESSOR_CSTATE
 243         def_bool y
 244         depends on IA64 || X86
 245
 246 config ACPI_PROCESSOR_IDLE
 247         bool
 248         select CPU_IDLE
 249
 250 config ACPI_MCFG
 251         bool
 252
 253 config ACPI_CPPC_LIB
 254         bool
 255         depends on ACPI_PROCESSOR
 256         select MAILBOX
 257         select PCC
 258         help
 259           If this option is enabled, this file implements common functionality
 260           to parse CPPC tables as described in the ACPI 5.1+ spec. The
 261           routines implemented are meant to be used by other
 262           drivers to control CPU performance using CPPC semantics.
 263           If your platform does not support CPPC in firmware,
 264           leave this option disabled.
 265
 266 config ACPI_PROCESSOR
 267         tristate "Processor"
 268         depends on X86 || IA64 || ARM64
 269         select ACPI_PROCESSOR_IDLE
 270         select ACPI_CPU_FREQ_PSS if X86 || IA64
 271         default y
 272         help
 273           This driver adds support for the ACPI Processor package. It is required
 274           by several flavors of cpufreq performance-state, thermal, throttling and
 275           idle drivers.
 276
 277           To compile this driver as a module, choose M here:
 278           the module will be called processor.
 279
 280 config ACPI_IPMI
 281         tristate "IPMI"
 282         depends on IPMI_HANDLER
 283         help
 284           This driver enables the ACPI to access the BMC controller. And it
 285           uses the IPMI request/response message to communicate with BMC
 286           controller, which can be found on on the server.
 287
 288           To compile this driver as a module, choose M here:
 289           the module will be called as acpi_ipmi.
 290
 291 config ACPI_HOTPLUG_CPU
 292         bool
 293         depends on ACPI_PROCESSOR && HOTPLUG_CPU
 294         select ACPI_CONTAINER
 295         default y
 296
 297 config ACPI_PROCESSOR_AGGREGATOR
 298         tristate "Processor Aggregator"
 299         depends on ACPI_PROCESSOR
 300         depends on X86
 301         help
 302           ACPI 4.0 defines processor Aggregator, which enables OS to perform
 303           specific processor configuration and control that applies to all
 304           processors in the platform. Currently only logical processor idling
 305           is defined, which is to reduce power consumption. This driver
 306           supports the new device.
 307
 308 config ACPI_THERMAL
 309         tristate "Thermal Zone"
 310         depends on ACPI_PROCESSOR
 311         select THERMAL
 312         default y
 313         help
 314           This driver supports ACPI thermal zones.  Most mobile and
 315           some desktop systems support ACPI thermal zones.  It is HIGHLY
 316           recommended that this option be enabled, as your processor(s)
 317           may be damaged without it.
 318
 319           To compile this driver as a module, choose M here:
 320           the module will be called thermal.
 321
 322 config ACPI_NUMA
 323         bool "NUMA support"
 324         depends on NUMA
 325         depends on (X86 || IA64 || ARM64)
 326         default y if IA64_GENERIC || IA64_SGI_SN2 || ARM64
 327
 328 config ACPI_CUSTOM_DSDT_FILE
 329         string "Custom DSDT Table file to include"
 330         default ""
 331         depends on !STANDALONE
 332         help
 333           This option supports a custom DSDT by linking it into the kernel.
 334           See Documentation/admin-guide/acpi/dsdt-override.rst
 335
 336           Enter the full path name to the file which includes the AmlCode
 337           or dsdt_aml_code declaration.
 338
 339           If unsure, don't enter a file name.
 340
 341 config ACPI_CUSTOM_DSDT
 342         bool
 343         default ACPI_CUSTOM_DSDT_FILE != ""
 344
 345 config ARCH_HAS_ACPI_TABLE_UPGRADE
 346         def_bool n
 347
 348 config ACPI_TABLE_UPGRADE
 349         bool "Allow upgrading ACPI tables via initrd"
 350         depends on BLK_DEV_INITRD && ARCH_HAS_ACPI_TABLE_UPGRADE
 351         default y
 352         help
 353           This option provides functionality to upgrade arbitrary ACPI tables
 354           via initrd. No functional change if no ACPI tables are passed via
 355           initrd, therefore it's safe to say Y.
 356           See Documentation/admin-guide/acpi/initrd_table_override.rst for details
 357
 358 config ACPI_TABLE_OVERRIDE_VIA_BUILTIN_INITRD
 359         bool "Override ACPI tables from built-in initrd"
 360         depends on ACPI_TABLE_UPGRADE
 361         depends on INITRAMFS_SOURCE!="" && INITRAMFS_COMPRESSION=""
 362         help
 363           This option provides functionality to override arbitrary ACPI tables
 364           from built-in uncompressed initrd.
 365
 366           See Documentation/admin-guide/acpi/initrd_table_override.rst for details
 367
 368 config ACPI_DEBUG
 369         bool "Debug Statements"
 370         help
 371           The ACPI subsystem can produce debug output.  Saying Y enables this
 372           output and increases the kernel size by around 50K.
 373
 374           Use the acpi.debug_layer and acpi.debug_level kernel command-line
 375           parameters documented in Documentation/firmware-guide/acpi/debug.rst and
 376           Documentation/admin-guide/kernel-parameters.rst to control the type and
 377           amount of debug output.
 378
 379 config ACPI_PCI_SLOT
 380         bool "PCI slot detection driver"
 381         depends on SYSFS && PCI
 382         help
 383           This driver creates entries in /sys/bus/pci/slots/ for all PCI
 384           slots in the system.  This can help correlate PCI bus addresses,
 385           i.e., segment/bus/device/function tuples, with physical slots in
 386           the system.  If you are unsure, say N.
 387
 388 config ACPI_CONTAINER
 389         bool "Container and Module Devices"
 390         default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU)
 391         help
 392           This driver supports ACPI Container and Module devices (IDs
 393           ACPI0004, PNP0A05, and PNP0A06).
 394
 395           This helps support hotplug of nodes, CPUs, and memory.
 396
 397           To compile this driver as a module, choose M here:
 398           the module will be called container.
 399
 400 config ACPI_HOTPLUG_MEMORY
 401         bool "Memory Hotplug"
 402         depends on MEMORY_HOTPLUG
 403         help
 404           This driver supports ACPI memory hotplug.  The driver
 405           fields notifications on ACPI memory devices (PNP0C80),
 406           which represent memory ranges that may be onlined or
 407           offlined during runtime.
 408
 409           If your hardware and firmware do not support adding or
 410           removing memory devices at runtime, you need not enable
 411           this driver.
 412
 413           To compile this driver as a module, choose M here:
 414           the module will be called acpi_memhotplug.
 415
 416 config ACPI_HOTPLUG_IOAPIC
 417         bool
 418         depends on PCI
 419         depends on X86_IO_APIC
 420         default y
 421
 422 config ACPI_SBS
 423         tristate "Smart Battery System"
 424         depends on X86
 425         select POWER_SUPPLY
 426         help
 427           This driver supports the Smart Battery System, another
 428           type of access to battery information, found on some laptops.
 429
 430           To compile this driver as a module, choose M here:
 431           the modules will be called sbs and sbshc.
 432
 433 config ACPI_HED
 434         tristate "Hardware Error Device"
 435         help
 436           This driver supports the Hardware Error Device (PNP0C33),
 437           which is used to report some hardware errors notified via
 438           SCI, mainly the corrected errors.
 439
 440 config ACPI_CUSTOM_METHOD
 441         tristate "Allow ACPI methods to be inserted/replaced at run time"
 442         depends on DEBUG_FS
 443         help
 444           This debug facility allows ACPI AML methods to be inserted and/or
 445           replaced without rebooting the system. For details refer to:
 446           Documentation/firmware-guide/acpi/method-customizing.rst.
 447
 448           NOTE: This option is security sensitive, because it allows arbitrary
 449           kernel memory to be written to by root (uid=0) users, allowing them
 450           to bypass certain security measures (e.g. if root is not allowed to
 451           load additional kernel modules after boot, this feature may be used
 452           to override that restriction).
 453
 454 config ACPI_BGRT
 455         bool "Boottime Graphics Resource Table support"
 456         depends on EFI && (X86 || ARM64)
 457         help
 458           This driver adds support for exposing the ACPI Boottime Graphics
 459           Resource Table, which allows the operating system to obtain
 460           data from the firmware boot splash. It will appear under
 461           /sys/firmware/acpi/bgrt/ .
 462
 463 config ACPI_REDUCED_HARDWARE_ONLY
 464         bool "Hardware-reduced ACPI support only" if EXPERT
 465         def_bool n
 466         help
 467           This config item changes the way the ACPI code is built.  When this
 468           option is selected, the kernel will use a specialized version of
 469           ACPICA that ONLY supports the ACPI "reduced hardware" mode.  The
 470           resulting kernel will be smaller but it will also be restricted to
 471           running in ACPI reduced hardware mode ONLY.
 472
 473           If you are unsure what to do, do not enable this option.
 474
 475 source "drivers/acpi/nfit/Kconfig"
 476 source "drivers/acpi/hmat/Kconfig"
 477
 478 source "drivers/acpi/apei/Kconfig"
 479 source "drivers/acpi/dptf/Kconfig"
 480
 481 config ACPI_WATCHDOG
 482         bool
 483
 484 config ACPI_EXTLOG
 485         tristate "Extended Error Log support"
 486         depends on X86_MCE && X86_LOCAL_APIC && EDAC
 487         select UEFI_CPER
 488         help
 489           Certain usages such as Predictive Failure Analysis (PFA) require
 490           more information about the error than what can be described in
 491           processor machine check banks. Most server processors log
 492           additional information about the error in processor uncore
 493           registers. Since the addresses and layout of these registers vary
 494           widely from one processor to another, system software cannot
 495           readily make use of them. To complicate matters further, some of
 496           the additional error information cannot be constructed without
 497           detailed knowledge about platform topology.
 498
 499           Enhanced MCA Logging allows firmware to provide additional error
 500           information to system software, synchronous with MCE or CMCI. This
 501           driver adds support for that functionality with corresponding
 502           tracepoint which carries that information to userspace.
 503
 504 config ACPI_ADXL
 505         bool
 506
 507 menuconfig PMIC_OPREGION
 508         bool "PMIC (Power Management Integrated Circuit) operation region support"
 509         help
 510           Select this option to enable support for ACPI operation
 511           region of the PMIC chip. The operation region can be used
 512           to control power rails and sensor reading/writing on the
 513           PMIC chip.
 514
 515 if PMIC_OPREGION
 516 config CRC_PMIC_OPREGION
 517         bool "ACPI operation region support for CrystalCove PMIC"
 518         depends on INTEL_SOC_PMIC
 519         help
 520           This config adds ACPI operation region support for CrystalCove PMIC.
 521
 522 config XPOWER_PMIC_OPREGION
 523         bool "ACPI operation region support for XPower AXP288 PMIC"
 524         depends on MFD_AXP20X_I2C && IOSF_MBI=y
 525         help
 526           This config adds ACPI operation region support for XPower AXP288 PMIC.
 527
 528 config BXT_WC_PMIC_OPREGION
 529         bool "ACPI operation region support for BXT WhiskeyCove PMIC"
 530         depends on INTEL_SOC_PMIC_BXTWC
 531         help
 532           This config adds ACPI operation region support for BXT WhiskeyCove PMIC.
 533
 534 config CHT_WC_PMIC_OPREGION
 535         bool "ACPI operation region support for CHT Whiskey Cove PMIC"
 536         depends on INTEL_SOC_PMIC_CHTWC
 537         help
 538           This config adds ACPI operation region support for CHT Whiskey Cove PMIC.
 539
 540 config CHT_DC_TI_PMIC_OPREGION
 541         bool "ACPI operation region support for Dollar Cove TI PMIC"
 542         depends on INTEL_SOC_PMIC_CHTDC_TI
 543         help
 544           This config adds ACPI operation region support for Dollar Cove TI PMIC.
 545
 546 endif
 547
 548 config ACPI_CONFIGFS
 549         tristate "ACPI configfs support"
 550         select CONFIGFS_FS
 551         help
 552           Select this option to enable support for ACPI configuration from
 553           userspace. The configurable ACPI groups will be visible under
 554           /config/acpi, assuming configfs is mounted under /config.
 555
 556 if ARM64
 557 source "drivers/acpi/arm64/Kconfig"
 558
 559 config ACPI_PPTT
 560         bool
 561 endif
 562
 563 config TPS68470_PMIC_OPREGION
 564         bool "ACPI operation region support for TPS68470 PMIC"
 565         depends on MFD_TPS68470
 566         help
 567           This config adds ACPI operation region support for TI TPS68470 PMIC.
 568           TPS68470 device is an advanced power management unit that powers
 569           a Compact Camera Module (CCM), generates clocks for image sensors,
 570           drives a dual LED for flash and incorporates two LED drivers for
 571           general purpose indicators.
 572           This driver enables ACPI operation region support control voltage
 573           regulators and clocks.
 574
 575           This option is a bool as it provides an ACPI operation
 576           region, which must be available before any of the devices
 577           using this, are probed.
 578
 579 endif   # ACPI
 580
 581 config X86_PM_TIMER
 582         bool "Power Management Timer Support" if EXPERT
 583         depends on X86 && (ACPI || JAILHOUSE_GUEST)
 584         default y
 585         help
 586           The Power Management Timer is available on all ACPI-capable,
 587           in most cases even if ACPI is unusable or blacklisted.
 588
 589           This timing source is not affected by power management features
 590           like aggressive processor idling, throttling, frequency and/or
 591           voltage scaling, unlike the commonly used Time Stamp Counter
 592           (TSC) timing source.
 593
 594           You should nearly always say Y here because many modern
 595           systems require this timer.