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 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 168config 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 180config 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 193config 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 208config 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 219config 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 232config 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 238config ACPI_CPU_FREQ_PSS 239 bool 240 select THERMAL 241 242config ACPI_PROCESSOR_CSTATE 243 def_bool y 244 depends on ACPI_PROCESSOR 245 depends on IA64 || X86 246 247config ACPI_PROCESSOR_IDLE 248 bool 249 select CPU_IDLE 250 251config ACPI_MCFG 252 bool 253 254config 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 267config 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 281config 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 292config ACPI_HOTPLUG_CPU 293 bool 294 depends on ACPI_PROCESSOR && HOTPLUG_CPU 295 select ACPI_CONTAINER 296 default y 297 298config 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 309config 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 323config ACPI_CUSTOM_DSDT_FILE 324 string "Custom DSDT Table file to include" 325 default "" 326 depends on !STANDALONE 327 help 328 This option supports a custom DSDT by linking it into the kernel. 329 See Documentation/admin-guide/acpi/dsdt-override.rst 330 331 Enter the full path name to the file which includes the AmlCode 332 or dsdt_aml_code declaration. 333 334 If unsure, don't enter a file name. 335 336config ACPI_CUSTOM_DSDT 337 bool 338 default ACPI_CUSTOM_DSDT_FILE != "" 339 340config ARCH_HAS_ACPI_TABLE_UPGRADE 341 def_bool n 342 343config ACPI_TABLE_UPGRADE 344 bool "Allow upgrading ACPI tables via initrd" 345 depends on BLK_DEV_INITRD && ARCH_HAS_ACPI_TABLE_UPGRADE 346 default y 347 help 348 This option provides functionality to upgrade arbitrary ACPI tables 349 via initrd. No functional change if no ACPI tables are passed via 350 initrd, therefore it's safe to say Y. 351 See Documentation/admin-guide/acpi/initrd_table_override.rst for details 352 353config ACPI_TABLE_OVERRIDE_VIA_BUILTIN_INITRD 354 bool "Override ACPI tables from built-in initrd" 355 depends on ACPI_TABLE_UPGRADE 356 depends on INITRAMFS_SOURCE!="" && INITRAMFS_COMPRESSION="" 357 help 358 This option provides functionality to override arbitrary ACPI tables 359 from built-in uncompressed initrd. 360 361 See Documentation/admin-guide/acpi/initrd_table_override.rst for details 362 363config ACPI_DEBUG 364 bool "Debug Statements" 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/firmware-guide/acpi/debug.rst 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 && PCI 377 help 378 This driver creates entries in /sys/bus/pci/slots/ for all PCI 379 slots in the system. This can help correlate PCI bus addresses, 380 i.e., segment/bus/device/function tuples, with physical slots in 381 the system. If you are unsure, say N. 382 383config ACPI_CONTAINER 384 bool "Container and Module Devices" 385 default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU) 386 help 387 This driver supports ACPI Container and Module devices (IDs 388 ACPI0004, PNP0A05, and PNP0A06). 389 390 This helps support hotplug of nodes, CPUs, and memory. 391 392 To compile this driver as a module, choose M here: 393 the module will be called container. 394 395config ACPI_HOTPLUG_MEMORY 396 bool "Memory Hotplug" 397 depends on MEMORY_HOTPLUG 398 help 399 This driver supports ACPI memory hotplug. The driver 400 fields notifications on ACPI memory devices (PNP0C80), 401 which represent memory ranges that may be onlined or 402 offlined during runtime. 403 404 If your hardware and firmware do not support adding or 405 removing memory devices at runtime, you need not enable 406 this driver. 407 408 To compile this driver as a module, choose M here: 409 the module will be called acpi_memhotplug. 410 411config ACPI_HOTPLUG_IOAPIC 412 bool 413 depends on PCI 414 depends on X86_IO_APIC 415 default y 416 417config ACPI_SBS 418 tristate "Smart Battery System" 419 depends on X86 420 select POWER_SUPPLY 421 help 422 This driver supports the Smart Battery System, another 423 type of access to battery information, found on some laptops. 424 425 To compile this driver as a module, choose M here: 426 the modules will be called sbs and sbshc. 427 428config ACPI_HED 429 tristate "Hardware Error Device" 430 help 431 This driver supports the Hardware Error Device (PNP0C33), 432 which is used to report some hardware errors notified via 433 SCI, mainly the corrected errors. 434 435config ACPI_CUSTOM_METHOD 436 tristate "Allow ACPI methods to be inserted/replaced at run time" 437 depends on DEBUG_FS 438 help 439 This debug facility allows ACPI AML methods to be inserted and/or 440 replaced without rebooting the system. For details refer to: 441 Documentation/firmware-guide/acpi/method-customizing.rst. 442 443 NOTE: This option is security sensitive, because it allows arbitrary 444 kernel memory to be written to by root (uid=0) users, allowing them 445 to bypass certain security measures (e.g. if root is not allowed to 446 load additional kernel modules after boot, this feature may be used 447 to override that restriction). 448 449config ACPI_BGRT 450 bool "Boottime Graphics Resource Table support" 451 depends on EFI && (X86 || ARM64) 452 help 453 This driver adds support for exposing the ACPI Boottime Graphics 454 Resource Table, which allows the operating system to obtain 455 data from the firmware boot splash. It will appear under 456 /sys/firmware/acpi/bgrt/ . 457 458config ACPI_REDUCED_HARDWARE_ONLY 459 bool "Hardware-reduced ACPI support only" if EXPERT 460 def_bool n 461 help 462 This config item changes the way the ACPI code is built. When this 463 option is selected, the kernel will use a specialized version of 464 ACPICA that ONLY supports the ACPI "reduced hardware" mode. The 465 resulting kernel will be smaller but it will also be restricted to 466 running in ACPI reduced hardware mode ONLY. 467 468 If you are unsure what to do, do not enable this option. 469 470source "drivers/acpi/nfit/Kconfig" 471source "drivers/acpi/numa/Kconfig" 472source "drivers/acpi/apei/Kconfig" 473source "drivers/acpi/dptf/Kconfig" 474 475config ACPI_WATCHDOG 476 bool 477 478config ACPI_EXTLOG 479 tristate "Extended Error Log support" 480 depends on X86_MCE && X86_LOCAL_APIC && EDAC 481 select UEFI_CPER 482 help 483 Certain usages such as Predictive Failure Analysis (PFA) require 484 more information about the error than what can be described in 485 processor machine check banks. Most server processors log 486 additional information about the error in processor uncore 487 registers. Since the addresses and layout of these registers vary 488 widely from one processor to another, system software cannot 489 readily make use of them. To complicate matters further, some of 490 the additional error information cannot be constructed without 491 detailed knowledge about platform topology. 492 493 Enhanced MCA Logging allows firmware to provide additional error 494 information to system software, synchronous with MCE or CMCI. This 495 driver adds support for that functionality with corresponding 496 tracepoint which carries that information to userspace. 497 498config ACPI_ADXL 499 bool 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 BYTCRC_PMIC_OPREGION 511 bool "ACPI operation region support for Bay Trail Crystal Cove PMIC" 512 depends on INTEL_SOC_PMIC 513 help 514 This config adds ACPI operation region support for the Bay Trail 515 version of the Crystal Cove PMIC. 516 517config CHTCRC_PMIC_OPREGION 518 bool "ACPI operation region support for Cherry Trail Crystal Cove PMIC" 519 depends on INTEL_SOC_PMIC 520 help 521 This config adds ACPI operation region support for the Cherry Trail 522 version of the Crystal Cove 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