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 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 45if ACPI 46 47config ACPI_LEGACY_TABLES_LOOKUP 48 bool 49 50config ARCH_MIGHT_HAVE_ACPI_PDC 51 bool 52 53config ACPI_GENERIC_GSI 54 bool 55 56config ACPI_SYSTEM_POWER_STATES_SUPPORT 57 bool 58 59config ACPI_CCA_REQUIRED 60 bool 61 62config 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 71if ACPI_DEBUGGER 72 73config 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 80endif 81 82config 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 90config ACPI_LPIT 91 bool 92 depends on X86_64 93 default y 94 95config ACPI_SLEEP 96 bool 97 depends on SUSPEND || HIBERNATION 98 depends on ACPI_SYSTEM_POWER_STATES_SUPPORT 99 default y 100 101config 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 118config 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 138config 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 155config 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 168config 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 181config 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 194config 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 209config 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 220config 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 233config 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 239config ACPI_CPU_FREQ_PSS 240 bool 241 select THERMAL 242 243config ACPI_PROCESSOR_CSTATE 244 def_bool y 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_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 329config 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 342config ACPI_CUSTOM_DSDT 343 bool 344 default ACPI_CUSTOM_DSDT_FILE != "" 345 346config ARCH_HAS_ACPI_TABLE_UPGRADE 347 def_bool n 348 349config 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 359config 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 370config 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 379config 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 391config 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 407config ACPI_HOTPLUG_IOAPIC 408 bool 409 depends on PCI 410 depends on X86_IO_APIC 411 default y 412 413config 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 424config 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 431config 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 445config 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 454config 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 466source "drivers/acpi/nfit/Kconfig" 467 468source "drivers/acpi/apei/Kconfig" 469source "drivers/acpi/dptf/Kconfig" 470 471config ACPI_WATCHDOG 472 bool 473 474config 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 494config ACPI_ADXL 495 bool 496 497menuconfig 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 505if PMIC_OPREGION 506config 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 512config 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 518config 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 524config 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 530config 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 536endif 537 538config 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 546if ARM64 547source "drivers/acpi/arm64/Kconfig" 548 549config ACPI_PPTT 550 bool 551endif 552 553config 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 569endif # ACPI 570 571config 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. 586