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 depends on PCI 13 select PNP 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 default n 142 help 143 Say N to disable Embedded Controller /sys/kernel/debug interface 144 145 Be aware that using this interface can confuse your Embedded 146 Controller in a way that a normal reboot is not enough. You then 147 have to power off your system, and remove the laptop battery for 148 some seconds. 149 An Embedded Controller typically is available on laptops and reads 150 sensor values like battery state and temperature. 151 The kernel accesses the EC through ACPI parsed code provided by BIOS 152 tables. This option allows to access the EC directly without ACPI 153 code being involved. 154 Thus this option is a debug option that helps to write ACPI drivers 155 and can be used to identify ACPI code or EC firmware bugs. 156 157config ACPI_AC 158 tristate "AC Adapter" 159 depends on X86 160 select POWER_SUPPLY 161 default y 162 help 163 This driver supports the AC Adapter object, which indicates 164 whether a system is on AC or not. If you have a system that can 165 switch between A/C and battery, say Y. 166 167 To compile this driver as a module, choose M here: 168 the module will be called ac. 169 170config ACPI_BATTERY 171 tristate "Battery" 172 depends on X86 173 select POWER_SUPPLY 174 default y 175 help 176 This driver adds support for battery information through 177 /proc/acpi/battery. If you have a mobile system with a battery, 178 say Y. 179 180 To compile this driver as a module, choose M here: 181 the module will be called battery. 182 183config ACPI_BUTTON 184 tristate "Button" 185 depends on INPUT 186 default y 187 help 188 This driver handles events on the power, sleep, and lid buttons. 189 A daemon reads events from input devices or via netlink and 190 performs user-defined actions such as shutting down the system. 191 This is necessary for software-controlled poweroff. 192 193 To compile this driver as a module, choose M here: 194 the module will be called button. 195 196config ACPI_VIDEO 197 tristate "Video" 198 depends on X86 && BACKLIGHT_CLASS_DEVICE 199 depends on INPUT 200 select THERMAL 201 help 202 This driver implements the ACPI Extensions For Display Adapters 203 for integrated graphics devices on motherboard, as specified in 204 ACPI 2.0 Specification, Appendix B. This supports basic operations 205 such as defining the video POST device, retrieving EDID information, 206 and setting up a video output. 207 208 To compile this driver as a module, choose M here: 209 the module will be called video. 210 211config ACPI_FAN 212 tristate "Fan" 213 depends on THERMAL 214 default y 215 help 216 This driver supports ACPI fan devices, allowing user-mode 217 applications to perform basic fan control (on, off, status). 218 219 To compile this driver as a module, choose M here: 220 the module will be called fan. 221 222config ACPI_TAD 223 tristate "ACPI Time and Alarm (TAD) Device Support" 224 depends on SYSFS && PM_SLEEP 225 help 226 The ACPI Time and Alarm (TAD) device is an alternative to the Real 227 Time Clock (RTC). Its wake timers allow the system to transition from 228 the S3 (or optionally S4/S5) state to S0 state after a time period 229 elapses. In comparison with the RTC Alarm, the TAD provides a larger 230 scale of flexibility in the wake timers. The time capabilities of the 231 TAD maintain the time of day information across platform power 232 transitions, and keep track of time even when the platform is turned 233 off. 234 235config ACPI_DOCK 236 bool "Dock" 237 help 238 This driver supports ACPI-controlled docking stations and removable 239 drive bays such as the IBM Ultrabay and the Dell Module Bay. 240 241config ACPI_CPU_FREQ_PSS 242 bool 243 select THERMAL 244 245config ACPI_PROCESSOR_CSTATE 246 def_bool y 247 depends on IA64 || X86 248 249config ACPI_PROCESSOR_IDLE 250 bool 251 select CPU_IDLE 252 253config ACPI_MCFG 254 bool 255 256config ACPI_CPPC_LIB 257 bool 258 depends on ACPI_PROCESSOR 259 select MAILBOX 260 select PCC 261 help 262 If this option is enabled, this file implements common functionality 263 to parse CPPC tables as described in the ACPI 5.1+ spec. The 264 routines implemented are meant to be used by other 265 drivers to control CPU performance using CPPC semantics. 266 If your platform does not support CPPC in firmware, 267 leave this option disabled. 268 269config ACPI_PROCESSOR 270 tristate "Processor" 271 depends on X86 || IA64 || ARM64 272 select ACPI_PROCESSOR_IDLE 273 select ACPI_CPU_FREQ_PSS if X86 || IA64 274 default y 275 help 276 This driver adds support for the ACPI Processor package. It is required 277 by several flavors of cpufreq performance-state, thermal, throttling and 278 idle drivers. 279 280 To compile this driver as a module, choose M here: 281 the module will be called processor. 282 283config ACPI_IPMI 284 tristate "IPMI" 285 depends on IPMI_HANDLER 286 default n 287 help 288 This driver enables the ACPI to access the BMC controller. And it 289 uses the IPMI request/response message to communicate with BMC 290 controller, which can be found on on the server. 291 292 To compile this driver as a module, choose M here: 293 the module will be called as acpi_ipmi. 294 295config ACPI_HOTPLUG_CPU 296 bool 297 depends on ACPI_PROCESSOR && HOTPLUG_CPU 298 select ACPI_CONTAINER 299 default y 300 301config ACPI_PROCESSOR_AGGREGATOR 302 tristate "Processor Aggregator" 303 depends on ACPI_PROCESSOR 304 depends on X86 305 help 306 ACPI 4.0 defines processor Aggregator, which enables OS to perform 307 specific processor configuration and control that applies to all 308 processors in the platform. Currently only logical processor idling 309 is defined, which is to reduce power consumption. This driver 310 supports the new device. 311 312config ACPI_THERMAL 313 tristate "Thermal Zone" 314 depends on ACPI_PROCESSOR 315 select THERMAL 316 default y 317 help 318 This driver supports ACPI thermal zones. Most mobile and 319 some desktop systems support ACPI thermal zones. It is HIGHLY 320 recommended that this option be enabled, as your processor(s) 321 may be damaged without it. 322 323 To compile this driver as a module, choose M here: 324 the module will be called thermal. 325 326config ACPI_NUMA 327 bool "NUMA support" 328 depends on NUMA 329 depends on (X86 || IA64 || ARM64) 330 default y if IA64_GENERIC || IA64_SGI_SN2 || ARM64 331 332config ACPI_CUSTOM_DSDT_FILE 333 string "Custom DSDT Table file to include" 334 default "" 335 depends on !STANDALONE 336 help 337 This option supports a custom DSDT by linking it into the kernel. 338 See Documentation/acpi/dsdt-override.txt 339 340 Enter the full path name to the file which includes the AmlCode 341 declaration. 342 343 If unsure, don't enter a file name. 344 345config ACPI_CUSTOM_DSDT 346 bool 347 default ACPI_CUSTOM_DSDT_FILE != "" 348 349config ARCH_HAS_ACPI_TABLE_UPGRADE 350 def_bool n 351 352config ACPI_TABLE_UPGRADE 353 bool "Allow upgrading ACPI tables via initrd" 354 depends on BLK_DEV_INITRD && ARCH_HAS_ACPI_TABLE_UPGRADE 355 default y 356 help 357 This option provides functionality to upgrade arbitrary ACPI tables 358 via initrd. No functional change if no ACPI tables are passed via 359 initrd, therefore it's safe to say Y. 360 See Documentation/acpi/initrd_table_override.txt for details 361 362config ACPI_DEBUG 363 bool "Debug Statements" 364 default n 365 help 366 The ACPI subsystem can produce debug output. Saying Y enables this 367 output and increases the kernel size by around 50K. 368 369 Use the acpi.debug_layer and acpi.debug_level kernel command-line 370 parameters documented in Documentation/acpi/debug.txt and 371 Documentation/admin-guide/kernel-parameters.rst to control the type and 372 amount of debug output. 373 374config ACPI_PCI_SLOT 375 bool "PCI slot detection driver" 376 depends on SYSFS 377 default n 378 help 379 This driver creates entries in /sys/bus/pci/slots/ for all PCI 380 slots in the system. This can help correlate PCI bus addresses, 381 i.e., segment/bus/device/function tuples, with physical slots in 382 the system. If you are unsure, say N. 383 384config ACPI_CONTAINER 385 bool "Container and Module Devices" 386 default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU) 387 help 388 This driver supports ACPI Container and Module devices (IDs 389 ACPI0004, PNP0A05, and PNP0A06). 390 391 This helps support hotplug of nodes, CPUs, and memory. 392 393 To compile this driver as a module, choose M here: 394 the module will be called container. 395 396config ACPI_HOTPLUG_MEMORY 397 bool "Memory Hotplug" 398 depends on MEMORY_HOTPLUG 399 help 400 This driver supports ACPI memory hotplug. The driver 401 fields notifications on ACPI memory devices (PNP0C80), 402 which represent memory ranges that may be onlined or 403 offlined during runtime. 404 405 If your hardware and firmware do not support adding or 406 removing memory devices at runtime, you need not enable 407 this driver. 408 409 To compile this driver as a module, choose M here: 410 the module will be called acpi_memhotplug. 411 412config ACPI_HOTPLUG_IOAPIC 413 bool 414 depends on PCI 415 depends on X86_IO_APIC 416 default y 417 418config ACPI_SBS 419 tristate "Smart Battery System" 420 depends on X86 421 select POWER_SUPPLY 422 help 423 This driver supports the Smart Battery System, another 424 type of access to battery information, found on some laptops. 425 426 To compile this driver as a module, choose M here: 427 the modules will be called sbs and sbshc. 428 429config ACPI_HED 430 tristate "Hardware Error Device" 431 help 432 This driver supports the Hardware Error Device (PNP0C33), 433 which is used to report some hardware errors notified via 434 SCI, mainly the corrected errors. 435 436config ACPI_CUSTOM_METHOD 437 tristate "Allow ACPI methods to be inserted/replaced at run time" 438 depends on DEBUG_FS 439 default n 440 help 441 This debug facility allows ACPI AML methods to be inserted and/or 442 replaced without rebooting the system. For details refer to: 443 Documentation/acpi/method-customizing.txt. 444 445 NOTE: This option is security sensitive, because it allows arbitrary 446 kernel memory to be written to by root (uid=0) users, allowing them 447 to bypass certain security measures (e.g. if root is not allowed to 448 load additional kernel modules after boot, this feature may be used 449 to override that restriction). 450 451config ACPI_BGRT 452 bool "Boottime Graphics Resource Table support" 453 depends on EFI && (X86 || ARM64) 454 help 455 This driver adds support for exposing the ACPI Boottime Graphics 456 Resource Table, which allows the operating system to obtain 457 data from the firmware boot splash. It will appear under 458 /sys/firmware/acpi/bgrt/ . 459 460config ACPI_REDUCED_HARDWARE_ONLY 461 bool "Hardware-reduced ACPI support only" if EXPERT 462 def_bool n 463 help 464 This config item changes the way the ACPI code is built. When this 465 option is selected, the kernel will use a specialized version of 466 ACPICA that ONLY supports the ACPI "reduced hardware" mode. The 467 resulting kernel will be smaller but it will also be restricted to 468 running in ACPI reduced hardware mode ONLY. 469 470 If you are unsure what to do, do not enable this option. 471 472source "drivers/acpi/nfit/Kconfig" 473 474source "drivers/acpi/apei/Kconfig" 475source "drivers/acpi/dptf/Kconfig" 476 477config ACPI_WATCHDOG 478 bool 479 480config ACPI_EXTLOG 481 tristate "Extended Error Log support" 482 depends on X86_MCE && X86_LOCAL_APIC && EDAC 483 select UEFI_CPER 484 default n 485 help 486 Certain usages such as Predictive Failure Analysis (PFA) require 487 more information about the error than what can be described in 488 processor machine check banks. Most server processors log 489 additional information about the error in processor uncore 490 registers. Since the addresses and layout of these registers vary 491 widely from one processor to another, system software cannot 492 readily make use of them. To complicate matters further, some of 493 the additional error information cannot be constructed without 494 detailed knowledge about platform topology. 495 496 Enhanced MCA Logging allows firmware to provide additional error 497 information to system software, synchronous with MCE or CMCI. This 498 driver adds support for that functionality with corresponding 499 tracepoint which carries that information to userspace. 500 501menuconfig PMIC_OPREGION 502 bool "PMIC (Power Management Integrated Circuit) operation region support" 503 help 504 Select this option to enable support for ACPI operation 505 region of the PMIC chip. The operation region can be used 506 to control power rails and sensor reading/writing on the 507 PMIC chip. 508 509if PMIC_OPREGION 510config CRC_PMIC_OPREGION 511 bool "ACPI operation region support for CrystalCove PMIC" 512 depends on INTEL_SOC_PMIC 513 help 514 This config adds ACPI operation region support for CrystalCove PMIC. 515 516config XPOWER_PMIC_OPREGION 517 bool "ACPI operation region support for XPower AXP288 PMIC" 518 depends on MFD_AXP20X_I2C 519 help 520 This config adds ACPI operation region support for XPower AXP288 PMIC. 521 522config BXT_WC_PMIC_OPREGION 523 bool "ACPI operation region support for BXT WhiskeyCove PMIC" 524 depends on INTEL_SOC_PMIC_BXTWC 525 help 526 This config adds ACPI operation region support for BXT WhiskeyCove PMIC. 527 528config CHT_WC_PMIC_OPREGION 529 bool "ACPI operation region support for CHT Whiskey Cove PMIC" 530 depends on INTEL_SOC_PMIC_CHTWC 531 help 532 This config adds ACPI operation region support for CHT Whiskey Cove PMIC. 533 534config CHT_DC_TI_PMIC_OPREGION 535 bool "ACPI operation region support for Dollar Cove TI PMIC" 536 depends on INTEL_SOC_PMIC_CHTDC_TI 537 help 538 This config adds ACPI operation region support for Dollar Cove TI PMIC. 539 540endif 541 542config ACPI_CONFIGFS 543 tristate "ACPI configfs support" 544 select CONFIGFS_FS 545 help 546 Select this option to enable support for ACPI configuration from 547 userspace. The configurable ACPI groups will be visible under 548 /config/acpi, assuming configfs is mounted under /config. 549 550if ARM64 551source "drivers/acpi/arm64/Kconfig" 552 553config ACPI_PPTT 554 bool 555endif 556 557config TPS68470_PMIC_OPREGION 558 bool "ACPI operation region support for TPS68470 PMIC" 559 depends on MFD_TPS68470 560 help 561 This config adds ACPI operation region support for TI TPS68470 PMIC. 562 TPS68470 device is an advanced power management unit that powers 563 a Compact Camera Module (CCM), generates clocks for image sensors, 564 drives a dual LED for flash and incorporates two LED drivers for 565 general purpose indicators. 566 This driver enables ACPI operation region support control voltage 567 regulators and clocks. 568 569 This option is a bool as it provides an ACPI operation 570 region, which must be available before any of the devices 571 using this, are probed. 572 573endif # ACPI 574 575config X86_PM_TIMER 576 bool "Power Management Timer Support" if EXPERT 577 depends on X86 && (ACPI || JAILHOUSE_GUEST) 578 default y 579 help 580 The Power Management Timer is available on all ACPI-capable, 581 in most cases even if ACPI is unusable or blacklisted. 582 583 This timing source is not affected by power management features 584 like aggressive processor idling, throttling, frequency and/or 585 voltage scaling, unlike the commonly used Time Stamp Counter 586 (TSC) timing source. 587 588 You should nearly always say Y here because many modern 589 systems require this timer. 590