1# SPDX-License-Identifier: GPL-2.0 2# 3# ACPI Configuration 4# 5 6config ARCH_SUPPORTS_ACPI 7 bool 8 9menuconfig 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 46if ACPI 47 48config ACPI_LEGACY_TABLES_LOOKUP 49 bool 50 51config ARCH_MIGHT_HAVE_ACPI_PDC 52 bool 53 54config ACPI_GENERIC_GSI 55 bool 56 57config ACPI_SYSTEM_POWER_STATES_SUPPORT 58 bool 59 60config ACPI_CCA_REQUIRED 61 bool 62 63config 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 72if ACPI_DEBUGGER 73 74config 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 81endif 82 83config 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 91config ACPI_LPIT 92 bool 93 depends on X86_64 94 default y 95 96config ACPI_SLEEP 97 bool 98 depends on SUSPEND || HIBERNATION 99 depends on ACPI_SYSTEM_POWER_STATES_SUPPORT 100 default y 101 102config 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 119config 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 139config 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 156config ACPI_AC 157 tristate "AC Adapter" 158 depends on X86 159 select POWER_SUPPLY 160 default y 161 help 162 This driver supports the AC Adapter object, which indicates 163 whether a system is on AC or not. If you have a system that can 164 switch between A/C and battery, say Y. 165 166 To compile this driver as a module, choose M here: 167 the module will be called ac. 168 169config ACPI_BATTERY 170 tristate "Battery" 171 depends on X86 172 select POWER_SUPPLY 173 default y 174 help 175 This driver adds support for battery information through 176 /proc/acpi/battery. If you have a mobile system with a battery, 177 say Y. 178 179 To compile this driver as a module, choose M here: 180 the module will be called battery. 181 182config ACPI_BUTTON 183 tristate "Button" 184 depends on INPUT 185 default y 186 help 187 This driver handles events on the power, sleep, and lid buttons. 188 A daemon reads events from input devices or via netlink and 189 performs user-defined actions such as shutting down the system. 190 This is necessary for software-controlled poweroff. 191 192 To compile this driver as a module, choose M here: 193 the module will be called button. 194 195config ACPI_VIDEO 196 tristate "Video" 197 depends on X86 && BACKLIGHT_CLASS_DEVICE 198 depends on INPUT 199 select THERMAL 200 help 201 This driver implements the ACPI Extensions For Display Adapters 202 for integrated graphics devices on motherboard, as specified in 203 ACPI 2.0 Specification, Appendix B. This supports basic operations 204 such as defining the video POST device, retrieving EDID information, 205 and setting up a video output. 206 207 To compile this driver as a module, choose M here: 208 the module will be called video. 209 210config ACPI_FAN 211 tristate "Fan" 212 depends on THERMAL 213 default y 214 help 215 This driver supports ACPI fan devices, allowing user-mode 216 applications to perform basic fan control (on, off, status). 217 218 To compile this driver as a module, choose M here: 219 the module will be called fan. 220 221config ACPI_TAD 222 tristate "ACPI Time and Alarm (TAD) Device Support" 223 depends on SYSFS && PM_SLEEP 224 help 225 The ACPI Time and Alarm (TAD) device is an alternative to the Real 226 Time Clock (RTC). Its wake timers allow the system to transition from 227 the S3 (or optionally S4/S5) state to S0 state after a time period 228 elapses. In comparison with the RTC Alarm, the TAD provides a larger 229 scale of flexibility in the wake timers. The time capabilities of the 230 TAD maintain the time of day information across platform power 231 transitions, and keep track of time even when the platform is turned 232 off. 233 234config ACPI_DOCK 235 bool "Dock" 236 help 237 This driver supports ACPI-controlled docking stations and removable 238 drive bays such as the IBM Ultrabay and the Dell Module Bay. 239 240config ACPI_CPU_FREQ_PSS 241 bool 242 select THERMAL 243 244config ACPI_PROCESSOR_CSTATE 245 def_bool y 246 depends on IA64 || X86 247 248config ACPI_PROCESSOR_IDLE 249 bool 250 select CPU_IDLE 251 252config ACPI_MCFG 253 bool 254 255config ACPI_CPPC_LIB 256 bool 257 depends on ACPI_PROCESSOR 258 select MAILBOX 259 select PCC 260 help 261 If this option is enabled, this file implements common functionality 262 to parse CPPC tables as described in the ACPI 5.1+ spec. The 263 routines implemented are meant to be used by other 264 drivers to control CPU performance using CPPC semantics. 265 If your platform does not support CPPC in firmware, 266 leave this option disabled. 267 268config ACPI_PROCESSOR 269 tristate "Processor" 270 depends on X86 || IA64 || ARM64 271 select ACPI_PROCESSOR_IDLE 272 select ACPI_CPU_FREQ_PSS if X86 || IA64 273 default y 274 help 275 This driver adds support for the ACPI Processor package. It is required 276 by several flavors of cpufreq performance-state, thermal, throttling and 277 idle drivers. 278 279 To compile this driver as a module, choose M here: 280 the module will be called processor. 281 282config ACPI_IPMI 283 tristate "IPMI" 284 depends on IPMI_HANDLER 285 help 286 This driver enables the ACPI to access the BMC controller. And it 287 uses the IPMI request/response message to communicate with BMC 288 controller, which can be found on on the server. 289 290 To compile this driver as a module, choose M here: 291 the module will be called as acpi_ipmi. 292 293config ACPI_HOTPLUG_CPU 294 bool 295 depends on ACPI_PROCESSOR && HOTPLUG_CPU 296 select ACPI_CONTAINER 297 default y 298 299config ACPI_PROCESSOR_AGGREGATOR 300 tristate "Processor Aggregator" 301 depends on ACPI_PROCESSOR 302 depends on X86 303 help 304 ACPI 4.0 defines processor Aggregator, which enables OS to perform 305 specific processor configuration and control that applies to all 306 processors in the platform. Currently only logical processor idling 307 is defined, which is to reduce power consumption. This driver 308 supports the new device. 309 310config ACPI_THERMAL 311 tristate "Thermal Zone" 312 depends on ACPI_PROCESSOR 313 select THERMAL 314 default y 315 help 316 This driver supports ACPI thermal zones. Most mobile and 317 some desktop systems support ACPI thermal zones. It is HIGHLY 318 recommended that this option be enabled, as your processor(s) 319 may be damaged without it. 320 321 To compile this driver as a module, choose M here: 322 the module will be called thermal. 323 324config ACPI_NUMA 325 bool "NUMA support" 326 depends on NUMA 327 depends on (X86 || IA64 || ARM64) 328 default y if IA64_GENERIC || IA64_SGI_SN2 || ARM64 329 330config ACPI_CUSTOM_DSDT_FILE 331 string "Custom DSDT Table file to include" 332 default "" 333 depends on !STANDALONE 334 help 335 This option supports a custom DSDT by linking it into the kernel. 336 See Documentation/acpi/dsdt-override.txt 337 338 Enter the full path name to the file which includes the AmlCode 339 or dsdt_aml_code declaration. 340 341 If unsure, don't enter a file name. 342 343config ACPI_CUSTOM_DSDT 344 bool 345 default ACPI_CUSTOM_DSDT_FILE != "" 346 347config ARCH_HAS_ACPI_TABLE_UPGRADE 348 def_bool n 349 350config ACPI_TABLE_UPGRADE 351 bool "Allow upgrading ACPI tables via initrd" 352 depends on BLK_DEV_INITRD && ARCH_HAS_ACPI_TABLE_UPGRADE 353 default y 354 help 355 This option provides functionality to upgrade arbitrary ACPI tables 356 via initrd. No functional change if no ACPI tables are passed via 357 initrd, therefore it's safe to say Y. 358 See Documentation/acpi/initrd_table_override.txt for details 359 360config ACPI_TABLE_OVERRIDE_VIA_BUILTIN_INITRD 361 bool "Override ACPI tables from built-in initrd" 362 depends on ACPI_TABLE_UPGRADE 363 depends on INITRAMFS_SOURCE!="" && INITRAMFS_COMPRESSION="" 364 help 365 This option provides functionality to override arbitrary ACPI tables 366 from built-in uncompressed initrd. 367 368 See Documentation/acpi/initrd_table_override.txt for details 369 370config ACPI_DEBUG 371 bool "Debug Statements" 372 help 373 The ACPI subsystem can produce debug output. Saying Y enables this 374 output and increases the kernel size by around 50K. 375 376 Use the acpi.debug_layer and acpi.debug_level kernel command-line 377 parameters documented in Documentation/acpi/debug.txt and 378 Documentation/admin-guide/kernel-parameters.rst to control the type and 379 amount of debug output. 380 381config ACPI_PCI_SLOT 382 bool "PCI slot detection driver" 383 depends on SYSFS && PCI 384 help 385 This driver creates entries in /sys/bus/pci/slots/ for all PCI 386 slots in the system. This can help correlate PCI bus addresses, 387 i.e., segment/bus/device/function tuples, with physical slots in 388 the system. If you are unsure, say N. 389 390config ACPI_CONTAINER 391 bool "Container and Module Devices" 392 default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU) 393 help 394 This driver supports ACPI Container and Module devices (IDs 395 ACPI0004, PNP0A05, and PNP0A06). 396 397 This helps support hotplug of nodes, CPUs, and memory. 398 399 To compile this driver as a module, choose M here: 400 the module will be called container. 401 402config ACPI_HOTPLUG_MEMORY 403 bool "Memory Hotplug" 404 depends on MEMORY_HOTPLUG 405 help 406 This driver supports ACPI memory hotplug. The driver 407 fields notifications on ACPI memory devices (PNP0C80), 408 which represent memory ranges that may be onlined or 409 offlined during runtime. 410 411 If your hardware and firmware do not support adding or 412 removing memory devices at runtime, you need not enable 413 this driver. 414 415 To compile this driver as a module, choose M here: 416 the module will be called acpi_memhotplug. 417 418config ACPI_HOTPLUG_IOAPIC 419 bool 420 depends on PCI 421 depends on X86_IO_APIC 422 default y 423 424config ACPI_SBS 425 tristate "Smart Battery System" 426 depends on X86 427 select POWER_SUPPLY 428 help 429 This driver supports the Smart Battery System, another 430 type of access to battery information, found on some laptops. 431 432 To compile this driver as a module, choose M here: 433 the modules will be called sbs and sbshc. 434 435config ACPI_HED 436 tristate "Hardware Error Device" 437 help 438 This driver supports the Hardware Error Device (PNP0C33), 439 which is used to report some hardware errors notified via 440 SCI, mainly the corrected errors. 441 442config ACPI_CUSTOM_METHOD 443 tristate "Allow ACPI methods to be inserted/replaced at run time" 444 depends on DEBUG_FS 445 help 446 This debug facility allows ACPI AML methods to be inserted and/or 447 replaced without rebooting the system. For details refer to: 448 Documentation/acpi/method-customizing.txt. 449 450 NOTE: This option is security sensitive, because it allows arbitrary 451 kernel memory to be written to by root (uid=0) users, allowing them 452 to bypass certain security measures (e.g. if root is not allowed to 453 load additional kernel modules after boot, this feature may be used 454 to override that restriction). 455 456config ACPI_BGRT 457 bool "Boottime Graphics Resource Table support" 458 depends on EFI && (X86 || ARM64) 459 help 460 This driver adds support for exposing the ACPI Boottime Graphics 461 Resource Table, which allows the operating system to obtain 462 data from the firmware boot splash. It will appear under 463 /sys/firmware/acpi/bgrt/ . 464 465config ACPI_REDUCED_HARDWARE_ONLY 466 bool "Hardware-reduced ACPI support only" if EXPERT 467 def_bool n 468 help 469 This config item changes the way the ACPI code is built. When this 470 option is selected, the kernel will use a specialized version of 471 ACPICA that ONLY supports the ACPI "reduced hardware" mode. The 472 resulting kernel will be smaller but it will also be restricted to 473 running in ACPI reduced hardware mode ONLY. 474 475 If you are unsure what to do, do not enable this option. 476 477source "drivers/acpi/nfit/Kconfig" 478source "drivers/acpi/hmat/Kconfig" 479 480source "drivers/acpi/apei/Kconfig" 481source "drivers/acpi/dptf/Kconfig" 482 483config ACPI_WATCHDOG 484 bool 485 486config ACPI_EXTLOG 487 tristate "Extended Error Log support" 488 depends on X86_MCE && X86_LOCAL_APIC && EDAC 489 select UEFI_CPER 490 help 491 Certain usages such as Predictive Failure Analysis (PFA) require 492 more information about the error than what can be described in 493 processor machine check banks. Most server processors log 494 additional information about the error in processor uncore 495 registers. Since the addresses and layout of these registers vary 496 widely from one processor to another, system software cannot 497 readily make use of them. To complicate matters further, some of 498 the additional error information cannot be constructed without 499 detailed knowledge about platform topology. 500 501 Enhanced MCA Logging allows firmware to provide additional error 502 information to system software, synchronous with MCE or CMCI. This 503 driver adds support for that functionality with corresponding 504 tracepoint which carries that information to userspace. 505 506config ACPI_ADXL 507 bool 508 509menuconfig PMIC_OPREGION 510 bool "PMIC (Power Management Integrated Circuit) operation region support" 511 help 512 Select this option to enable support for ACPI operation 513 region of the PMIC chip. The operation region can be used 514 to control power rails and sensor reading/writing on the 515 PMIC chip. 516 517if PMIC_OPREGION 518config CRC_PMIC_OPREGION 519 bool "ACPI operation region support for CrystalCove PMIC" 520 depends on INTEL_SOC_PMIC 521 help 522 This config adds ACPI operation region support for CrystalCove PMIC. 523 524config XPOWER_PMIC_OPREGION 525 bool "ACPI operation region support for XPower AXP288 PMIC" 526 depends on MFD_AXP20X_I2C && IOSF_MBI=y 527 help 528 This config adds ACPI operation region support for XPower AXP288 PMIC. 529 530config BXT_WC_PMIC_OPREGION 531 bool "ACPI operation region support for BXT WhiskeyCove PMIC" 532 depends on INTEL_SOC_PMIC_BXTWC 533 help 534 This config adds ACPI operation region support for BXT WhiskeyCove PMIC. 535 536config CHT_WC_PMIC_OPREGION 537 bool "ACPI operation region support for CHT Whiskey Cove PMIC" 538 depends on INTEL_SOC_PMIC_CHTWC 539 help 540 This config adds ACPI operation region support for CHT Whiskey Cove PMIC. 541 542config CHT_DC_TI_PMIC_OPREGION 543 bool "ACPI operation region support for Dollar Cove TI PMIC" 544 depends on INTEL_SOC_PMIC_CHTDC_TI 545 help 546 This config adds ACPI operation region support for Dollar Cove TI PMIC. 547 548endif 549 550config ACPI_CONFIGFS 551 tristate "ACPI configfs support" 552 select CONFIGFS_FS 553 help 554 Select this option to enable support for ACPI configuration from 555 userspace. The configurable ACPI groups will be visible under 556 /config/acpi, assuming configfs is mounted under /config. 557 558if ARM64 559source "drivers/acpi/arm64/Kconfig" 560 561config ACPI_PPTT 562 bool 563endif 564 565config TPS68470_PMIC_OPREGION 566 bool "ACPI operation region support for TPS68470 PMIC" 567 depends on MFD_TPS68470 568 help 569 This config adds ACPI operation region support for TI TPS68470 PMIC. 570 TPS68470 device is an advanced power management unit that powers 571 a Compact Camera Module (CCM), generates clocks for image sensors, 572 drives a dual LED for flash and incorporates two LED drivers for 573 general purpose indicators. 574 This driver enables ACPI operation region support control voltage 575 regulators and clocks. 576 577 This option is a bool as it provides an ACPI operation 578 region, which must be available before any of the devices 579 using this, are probed. 580 581endif # ACPI 582 583config X86_PM_TIMER 584 bool "Power Management Timer Support" if EXPERT 585 depends on X86 && (ACPI || JAILHOUSE_GUEST) 586 default y 587 help 588 The Power Management Timer is available on all ACPI-capable, 589 in most cases even if ACPI is unusable or blacklisted. 590 591 This timing source is not affected by power management features 592 like aggressive processor idling, throttling, frequency and/or 593 voltage scaling, unlike the commonly used Time Stamp Counter 594 (TSC) timing source. 595 596 You should nearly always say Y here because many modern 597 systems require this timer. 598