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_TINY_POWER_BUTTON 194 tristate "Tiny Power Button Driver" 195 depends on !ACPI_BUTTON 196 help 197 This driver provides a tiny alternative to the ACPI Button driver. 198 The tiny power button driver only handles the power button. Rather 199 than notifying userspace via the input layer or a netlink event, this 200 driver directly signals the init process to shut down. 201 202 This driver is particularly suitable for cloud and VM environments, 203 which use a simulated power button to initiate a controlled poweroff, 204 but which may not want to run a separate userspace daemon to process 205 input events. 206 207config ACPI_TINY_POWER_BUTTON_SIGNAL 208 int "Tiny Power Button Signal" 209 depends on ACPI_TINY_POWER_BUTTON 210 default 38 211 help 212 Default signal to send to init in response to the power button. 213 214 Likely values here include 38 (SIGRTMIN+4) to power off, or 2 215 (SIGINT) to simulate Ctrl+Alt+Del. 216 217config ACPI_VIDEO 218 tristate "Video" 219 depends on X86 && BACKLIGHT_CLASS_DEVICE 220 depends on INPUT 221 select THERMAL 222 help 223 This driver implements the ACPI Extensions For Display Adapters 224 for integrated graphics devices on motherboard, as specified in 225 ACPI 2.0 Specification, Appendix B. This supports basic operations 226 such as defining the video POST device, retrieving EDID information, 227 and setting up a video output. 228 229 To compile this driver as a module, choose M here: 230 the module will be called video. 231 232config ACPI_FAN 233 tristate "Fan" 234 depends on THERMAL 235 default y 236 help 237 This driver supports ACPI fan devices, allowing user-mode 238 applications to perform basic fan control (on, off, status). 239 240 To compile this driver as a module, choose M here: 241 the module will be called fan. 242 243config ACPI_TAD 244 tristate "ACPI Time and Alarm (TAD) Device Support" 245 depends on SYSFS && PM_SLEEP 246 help 247 The ACPI Time and Alarm (TAD) device is an alternative to the Real 248 Time Clock (RTC). Its wake timers allow the system to transition from 249 the S3 (or optionally S4/S5) state to S0 state after a time period 250 elapses. In comparison with the RTC Alarm, the TAD provides a larger 251 scale of flexibility in the wake timers. The time capabilities of the 252 TAD maintain the time of day information across platform power 253 transitions, and keep track of time even when the platform is turned 254 off. 255 256config ACPI_DOCK 257 bool "Dock" 258 help 259 This driver supports ACPI-controlled docking stations and removable 260 drive bays such as the IBM Ultrabay and the Dell Module Bay. 261 262config ACPI_CPU_FREQ_PSS 263 bool 264 select THERMAL 265 266config ACPI_PROCESSOR_CSTATE 267 def_bool y 268 depends on ACPI_PROCESSOR 269 depends on IA64 || X86 270 271config ACPI_PROCESSOR_IDLE 272 bool 273 select CPU_IDLE 274 275config ACPI_MCFG 276 bool 277 278config ACPI_CPPC_LIB 279 bool 280 depends on ACPI_PROCESSOR 281 select MAILBOX 282 select PCC 283 help 284 If this option is enabled, this file implements common functionality 285 to parse CPPC tables as described in the ACPI 5.1+ spec. The 286 routines implemented are meant to be used by other 287 drivers to control CPU performance using CPPC semantics. 288 If your platform does not support CPPC in firmware, 289 leave this option disabled. 290 291config ACPI_PROCESSOR 292 tristate "Processor" 293 depends on X86 || IA64 || ARM64 294 select ACPI_PROCESSOR_IDLE 295 select ACPI_CPU_FREQ_PSS if X86 || IA64 296 default y 297 help 298 This driver adds support for the ACPI Processor package. It is required 299 by several flavors of cpufreq performance-state, thermal, throttling and 300 idle drivers. 301 302 To compile this driver as a module, choose M here: 303 the module will be called processor. 304 305config ACPI_IPMI 306 tristate "IPMI" 307 depends on IPMI_HANDLER 308 help 309 This driver enables the ACPI to access the BMC controller. And it 310 uses the IPMI request/response message to communicate with BMC 311 controller, which can be found on on the server. 312 313 To compile this driver as a module, choose M here: 314 the module will be called as acpi_ipmi. 315 316config ACPI_HOTPLUG_CPU 317 bool 318 depends on ACPI_PROCESSOR && HOTPLUG_CPU 319 select ACPI_CONTAINER 320 default y 321 322config ACPI_PROCESSOR_AGGREGATOR 323 tristate "Processor Aggregator" 324 depends on ACPI_PROCESSOR 325 depends on X86 326 help 327 ACPI 4.0 defines processor Aggregator, which enables OS to perform 328 specific processor configuration and control that applies to all 329 processors in the platform. Currently only logical processor idling 330 is defined, which is to reduce power consumption. This driver 331 supports the new device. 332 333config ACPI_THERMAL 334 tristate "Thermal Zone" 335 depends on ACPI_PROCESSOR 336 select THERMAL 337 default y 338 help 339 This driver supports ACPI thermal zones. Most mobile and 340 some desktop systems support ACPI thermal zones. It is HIGHLY 341 recommended that this option be enabled, as your processor(s) 342 may be damaged without it. 343 344 To compile this driver as a module, choose M here: 345 the module will be called thermal. 346 347config ACPI_CUSTOM_DSDT_FILE 348 string "Custom DSDT Table file to include" 349 default "" 350 depends on !STANDALONE 351 help 352 This option supports a custom DSDT by linking it into the kernel. 353 See Documentation/admin-guide/acpi/dsdt-override.rst 354 355 Enter the full path name to the file which includes the AmlCode 356 or dsdt_aml_code declaration. 357 358 If unsure, don't enter a file name. 359 360config ACPI_CUSTOM_DSDT 361 bool 362 default ACPI_CUSTOM_DSDT_FILE != "" 363 364config ARCH_HAS_ACPI_TABLE_UPGRADE 365 def_bool n 366 367config ACPI_TABLE_UPGRADE 368 bool "Allow upgrading ACPI tables via initrd" 369 depends on BLK_DEV_INITRD && ARCH_HAS_ACPI_TABLE_UPGRADE 370 default y 371 help 372 This option provides functionality to upgrade arbitrary ACPI tables 373 via initrd. No functional change if no ACPI tables are passed via 374 initrd, therefore it's safe to say Y. 375 See Documentation/admin-guide/acpi/initrd_table_override.rst for details 376 377config ACPI_TABLE_OVERRIDE_VIA_BUILTIN_INITRD 378 bool "Override ACPI tables from built-in initrd" 379 depends on ACPI_TABLE_UPGRADE 380 depends on INITRAMFS_SOURCE!="" && INITRAMFS_COMPRESSION="" 381 help 382 This option provides functionality to override arbitrary ACPI tables 383 from built-in uncompressed initrd. 384 385 See Documentation/admin-guide/acpi/initrd_table_override.rst for details 386 387config ACPI_DEBUG 388 bool "Debug Statements" 389 help 390 The ACPI subsystem can produce debug output. Saying Y enables this 391 output and increases the kernel size by around 50K. 392 393 Use the acpi.debug_layer and acpi.debug_level kernel command-line 394 parameters documented in Documentation/firmware-guide/acpi/debug.rst and 395 Documentation/admin-guide/kernel-parameters.rst to control the type and 396 amount of debug output. 397 398config ACPI_PCI_SLOT 399 bool "PCI slot detection driver" 400 depends on SYSFS && PCI 401 help 402 This driver creates entries in /sys/bus/pci/slots/ for all PCI 403 slots in the system. This can help correlate PCI bus addresses, 404 i.e., segment/bus/device/function tuples, with physical slots in 405 the system. If you are unsure, say N. 406 407config ACPI_CONTAINER 408 bool "Container and Module Devices" 409 default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU) 410 help 411 This driver supports ACPI Container and Module devices (IDs 412 ACPI0004, PNP0A05, and PNP0A06). 413 414 This helps support hotplug of nodes, CPUs, and memory. 415 416 To compile this driver as a module, choose M here: 417 the module will be called container. 418 419config ACPI_HOTPLUG_MEMORY 420 bool "Memory Hotplug" 421 depends on MEMORY_HOTPLUG 422 help 423 This driver supports ACPI memory hotplug. The driver 424 fields notifications on ACPI memory devices (PNP0C80), 425 which represent memory ranges that may be onlined or 426 offlined during runtime. 427 428 If your hardware and firmware do not support adding or 429 removing memory devices at runtime, you need not enable 430 this driver. 431 432 To compile this driver as a module, choose M here: 433 the module will be called acpi_memhotplug. 434 435config ACPI_HOTPLUG_IOAPIC 436 bool 437 depends on PCI 438 depends on X86_IO_APIC 439 default y 440 441config ACPI_SBS 442 tristate "Smart Battery System" 443 depends on X86 444 select POWER_SUPPLY 445 help 446 This driver supports the Smart Battery System, another 447 type of access to battery information, found on some laptops. 448 449 To compile this driver as a module, choose M here: 450 the modules will be called sbs and sbshc. 451 452config ACPI_HED 453 tristate "Hardware Error Device" 454 help 455 This driver supports the Hardware Error Device (PNP0C33), 456 which is used to report some hardware errors notified via 457 SCI, mainly the corrected errors. 458 459config ACPI_CUSTOM_METHOD 460 tristate "Allow ACPI methods to be inserted/replaced at run time" 461 depends on DEBUG_FS 462 help 463 This debug facility allows ACPI AML methods to be inserted and/or 464 replaced without rebooting the system. For details refer to: 465 Documentation/firmware-guide/acpi/method-customizing.rst. 466 467 NOTE: This option is security sensitive, because it allows arbitrary 468 kernel memory to be written to by root (uid=0) users, allowing them 469 to bypass certain security measures (e.g. if root is not allowed to 470 load additional kernel modules after boot, this feature may be used 471 to override that restriction). 472 473config ACPI_BGRT 474 bool "Boottime Graphics Resource Table support" 475 depends on EFI && (X86 || ARM64) 476 help 477 This driver adds support for exposing the ACPI Boottime Graphics 478 Resource Table, which allows the operating system to obtain 479 data from the firmware boot splash. It will appear under 480 /sys/firmware/acpi/bgrt/ . 481 482config ACPI_REDUCED_HARDWARE_ONLY 483 bool "Hardware-reduced ACPI support only" if EXPERT 484 def_bool n 485 help 486 This config item changes the way the ACPI code is built. When this 487 option is selected, the kernel will use a specialized version of 488 ACPICA that ONLY supports the ACPI "reduced hardware" mode. The 489 resulting kernel will be smaller but it will also be restricted to 490 running in ACPI reduced hardware mode ONLY. 491 492 If you are unsure what to do, do not enable this option. 493 494source "drivers/acpi/nfit/Kconfig" 495source "drivers/acpi/numa/Kconfig" 496source "drivers/acpi/apei/Kconfig" 497source "drivers/acpi/dptf/Kconfig" 498 499config ACPI_WATCHDOG 500 bool 501 502config ACPI_EXTLOG 503 tristate "Extended Error Log support" 504 depends on X86_MCE && X86_LOCAL_APIC && EDAC 505 select UEFI_CPER 506 help 507 Certain usages such as Predictive Failure Analysis (PFA) require 508 more information about the error than what can be described in 509 processor machine check banks. Most server processors log 510 additional information about the error in processor uncore 511 registers. Since the addresses and layout of these registers vary 512 widely from one processor to another, system software cannot 513 readily make use of them. To complicate matters further, some of 514 the additional error information cannot be constructed without 515 detailed knowledge about platform topology. 516 517 Enhanced MCA Logging allows firmware to provide additional error 518 information to system software, synchronous with MCE or CMCI. This 519 driver adds support for that functionality with corresponding 520 tracepoint which carries that information to userspace. 521 522config ACPI_ADXL 523 bool 524 525menuconfig PMIC_OPREGION 526 bool "PMIC (Power Management Integrated Circuit) operation region support" 527 help 528 Select this option to enable support for ACPI operation 529 region of the PMIC chip. The operation region can be used 530 to control power rails and sensor reading/writing on the 531 PMIC chip. 532 533if PMIC_OPREGION 534config BYTCRC_PMIC_OPREGION 535 bool "ACPI operation region support for Bay Trail Crystal Cove PMIC" 536 depends on INTEL_SOC_PMIC 537 help 538 This config adds ACPI operation region support for the Bay Trail 539 version of the Crystal Cove PMIC. 540 541config CHTCRC_PMIC_OPREGION 542 bool "ACPI operation region support for Cherry Trail Crystal Cove PMIC" 543 depends on INTEL_SOC_PMIC 544 help 545 This config adds ACPI operation region support for the Cherry Trail 546 version of the Crystal Cove PMIC. 547 548config XPOWER_PMIC_OPREGION 549 bool "ACPI operation region support for XPower AXP288 PMIC" 550 depends on MFD_AXP20X_I2C && IOSF_MBI=y 551 help 552 This config adds ACPI operation region support for XPower AXP288 PMIC. 553 554config BXT_WC_PMIC_OPREGION 555 bool "ACPI operation region support for BXT WhiskeyCove PMIC" 556 depends on INTEL_SOC_PMIC_BXTWC 557 help 558 This config adds ACPI operation region support for BXT WhiskeyCove PMIC. 559 560config CHT_WC_PMIC_OPREGION 561 bool "ACPI operation region support for CHT Whiskey Cove PMIC" 562 depends on INTEL_SOC_PMIC_CHTWC 563 help 564 This config adds ACPI operation region support for CHT Whiskey Cove PMIC. 565 566config CHT_DC_TI_PMIC_OPREGION 567 bool "ACPI operation region support for Dollar Cove TI PMIC" 568 depends on INTEL_SOC_PMIC_CHTDC_TI 569 help 570 This config adds ACPI operation region support for Dollar Cove TI PMIC. 571 572endif 573 574config ACPI_CONFIGFS 575 tristate "ACPI configfs support" 576 select CONFIGFS_FS 577 help 578 Select this option to enable support for ACPI configuration from 579 userspace. The configurable ACPI groups will be visible under 580 /config/acpi, assuming configfs is mounted under /config. 581 582if ARM64 583source "drivers/acpi/arm64/Kconfig" 584 585config ACPI_PPTT 586 bool 587endif 588 589config TPS68470_PMIC_OPREGION 590 bool "ACPI operation region support for TPS68470 PMIC" 591 depends on MFD_TPS68470 592 help 593 This config adds ACPI operation region support for TI TPS68470 PMIC. 594 TPS68470 device is an advanced power management unit that powers 595 a Compact Camera Module (CCM), generates clocks for image sensors, 596 drives a dual LED for flash and incorporates two LED drivers for 597 general purpose indicators. 598 This driver enables ACPI operation region support control voltage 599 regulators and clocks. 600 601 This option is a bool as it provides an ACPI operation 602 region, which must be available before any of the devices 603 using this, are probed. 604 605endif # ACPI 606 607config X86_PM_TIMER 608 bool "Power Management Timer Support" if EXPERT 609 depends on X86 && (ACPI || JAILHOUSE_GUEST) 610 default y 611 help 612 The Power Management Timer is available on all ACPI-capable, 613 in most cases even if ACPI is unusable or blacklisted. 614 615 This timing source is not affected by power management features 616 like aggressive processor idling, throttling, frequency and/or 617 voltage scaling, unlike the commonly used Time Stamp Counter 618 (TSC) timing source. 619 620 You should nearly always say Y here because many modern 621 systems require this timer. 622