1# SPDX-License-Identifier: GPL-2.0 2# 3# ACPI Configuration 4# 5 6menuconfig ACPI 7 bool "ACPI (Advanced Configuration and Power Interface) Support" 8 depends on !IA64_HP_SIM 9 depends on IA64 || X86 || ARM64 10 depends on PCI 11 select PNP 12 default y if (IA64 || X86) 13 help 14 Advanced Configuration and Power Interface (ACPI) support for 15 Linux requires an ACPI-compliant platform (hardware/firmware), 16 and assumes the presence of OS-directed configuration and power 17 management (OSPM) software. This option will enlarge your 18 kernel by about 70K. 19 20 Linux ACPI provides a robust functional replacement for several 21 legacy configuration and power management interfaces, including 22 the Plug-and-Play BIOS specification (PnP BIOS), the 23 MultiProcessor Specification (MPS), and the Advanced Power 24 Management (APM) specification. If both ACPI and APM support 25 are configured, ACPI is used. 26 27 The project home page for the Linux ACPI subsystem is here: 28 <https://01.org/linux-acpi> 29 30 Linux support for ACPI is based on Intel Corporation's ACPI 31 Component Architecture (ACPI CA). For more information on the 32 ACPI CA, see: 33 <http://acpica.org/> 34 35 ACPI is an open industry specification originally co-developed by 36 Hewlett-Packard, Intel, Microsoft, Phoenix, and Toshiba. Currently, 37 it is developed by the ACPI Specification Working Group (ASWG) under 38 the UEFI Forum and any UEFI member can join the ASWG and contribute 39 to the ACPI specification. 40 The specification is available at: 41 <http://www.acpi.info> 42 <http://www.uefi.org/acpi/specs> 43 44if ACPI 45 46config ACPI_LEGACY_TABLES_LOOKUP 47 bool 48 49config ARCH_MIGHT_HAVE_ACPI_PDC 50 bool 51 52config ACPI_GENERIC_GSI 53 bool 54 55config ACPI_SYSTEM_POWER_STATES_SUPPORT 56 bool 57 58config ACPI_CCA_REQUIRED 59 bool 60 61config ACPI_DEBUGGER 62 bool "AML debugger interface" 63 select ACPI_DEBUG 64 help 65 Enable in-kernel debugging of AML facilities: statistics, 66 internal object dump, single step control method execution. 67 This is still under development, currently enabling this only 68 results in the compilation of the ACPICA debugger files. 69 70if ACPI_DEBUGGER 71 72config ACPI_DEBUGGER_USER 73 tristate "Userspace debugger accessiblity" 74 depends on DEBUG_FS 75 help 76 Export /sys/kernel/debug/acpi/acpidbg for userspace utilities 77 to access the debugger functionalities. 78 79endif 80 81config ACPI_SPCR_TABLE 82 bool 83 84config ACPI_LPIT 85 bool 86 depends on X86_64 87 default y 88 89config ACPI_SLEEP 90 bool 91 depends on SUSPEND || HIBERNATION 92 depends on ACPI_SYSTEM_POWER_STATES_SUPPORT 93 default y 94 95config ACPI_PROCFS_POWER 96 bool "Deprecated power /proc/acpi directories" 97 depends on X86 && PROC_FS 98 help 99 For backwards compatibility, this option allows 100 deprecated power /proc/acpi/ directories to exist, even when 101 they have been replaced by functions in /sys. 102 The deprecated directories (and their replacements) include: 103 /proc/acpi/battery/* (/sys/class/power_supply/*) 104 /proc/acpi/ac_adapter/* (sys/class/power_supply/*) 105 This option has no effect on /proc/acpi/ directories 106 and functions, which do not yet exist in /sys 107 This option, together with the proc directories, will be 108 deleted in the future. 109 110 Say N to delete power /proc/acpi/ directories that have moved to /sys/ 111 112config ACPI_REV_OVERRIDE_POSSIBLE 113 bool "Allow supported ACPI revision to be overridden" 114 depends on X86 115 default y 116 help 117 The platform firmware on some systems expects Linux to return "5" as 118 the supported ACPI revision which makes it expose system configuration 119 information in a special way. 120 121 For example, based on what ACPI exports as the supported revision, 122 Dell XPS 13 (2015) configures its audio device to either work in HDA 123 mode or in I2S mode, where the former is supposed to be used on Linux 124 until the latter is fully supported (in the kernel as well as in user 125 space). 126 127 This option enables a DMI-based quirk for the above Dell machine (so 128 that HDA audio is exposed by the platform firmware to the kernel) and 129 makes it possible to force the kernel to return "5" as the supported 130 ACPI revision via the "acpi_rev_override" command line switch. 131 132config ACPI_EC_DEBUGFS 133 tristate "EC read/write access through /sys/kernel/debug/ec" 134 default n 135 help 136 Say N to disable Embedded Controller /sys/kernel/debug interface 137 138 Be aware that using this interface can confuse your Embedded 139 Controller in a way that a normal reboot is not enough. You then 140 have to power off your system, and remove the laptop battery for 141 some seconds. 142 An Embedded Controller typically is available on laptops and reads 143 sensor values like battery state and temperature. 144 The kernel accesses the EC through ACPI parsed code provided by BIOS 145 tables. This option allows to access the EC directly without ACPI 146 code being involved. 147 Thus this option is a debug option that helps to write ACPI drivers 148 and can be used to identify ACPI code or EC firmware bugs. 149 150config ACPI_AC 151 tristate "AC Adapter" 152 depends on X86 153 select POWER_SUPPLY 154 default y 155 help 156 This driver supports the AC Adapter object, which indicates 157 whether a system is on AC or not. If you have a system that can 158 switch between A/C and battery, say Y. 159 160 To compile this driver as a module, choose M here: 161 the module will be called ac. 162 163config ACPI_BATTERY 164 tristate "Battery" 165 depends on X86 166 select POWER_SUPPLY 167 default y 168 help 169 This driver adds support for battery information through 170 /proc/acpi/battery. If you have a mobile system with a battery, 171 say Y. 172 173 To compile this driver as a module, choose M here: 174 the module will be called battery. 175 176config ACPI_BUTTON 177 tristate "Button" 178 depends on INPUT 179 default y 180 help 181 This driver handles events on the power, sleep, and lid buttons. 182 A daemon reads events from input devices or via netlink and 183 performs user-defined actions such as shutting down the system. 184 This is necessary for software-controlled poweroff. 185 186 To compile this driver as a module, choose M here: 187 the module will be called button. 188 189config ACPI_VIDEO 190 tristate "Video" 191 depends on X86 && BACKLIGHT_CLASS_DEVICE 192 depends on INPUT 193 select THERMAL 194 help 195 This driver implements the ACPI Extensions For Display Adapters 196 for integrated graphics devices on motherboard, as specified in 197 ACPI 2.0 Specification, Appendix B. This supports basic operations 198 such as defining the video POST device, retrieving EDID information, 199 and setting up a video output. 200 201 To compile this driver as a module, choose M here: 202 the module will be called video. 203 204config ACPI_FAN 205 tristate "Fan" 206 depends on THERMAL 207 default y 208 help 209 This driver supports ACPI fan devices, allowing user-mode 210 applications to perform basic fan control (on, off, status). 211 212 To compile this driver as a module, choose M here: 213 the module will be called fan. 214 215config ACPI_DOCK 216 bool "Dock" 217 help 218 This driver supports ACPI-controlled docking stations and removable 219 drive bays such as the IBM Ultrabay and the Dell Module Bay. 220 221config ACPI_CPU_FREQ_PSS 222 bool 223 select THERMAL 224 225config ACPI_PROCESSOR_CSTATE 226 def_bool y 227 depends on IA64 || X86 228 229config ACPI_PROCESSOR_IDLE 230 bool 231 select CPU_IDLE 232 233config ACPI_MCFG 234 bool 235 236config ACPI_CPPC_LIB 237 bool 238 depends on ACPI_PROCESSOR 239 select MAILBOX 240 select PCC 241 help 242 If this option is enabled, this file implements common functionality 243 to parse CPPC tables as described in the ACPI 5.1+ spec. The 244 routines implemented are meant to be used by other 245 drivers to control CPU performance using CPPC semantics. 246 If your platform does not support CPPC in firmware, 247 leave this option disabled. 248 249config ACPI_PROCESSOR 250 tristate "Processor" 251 depends on X86 || IA64 || ARM64 252 select ACPI_PROCESSOR_IDLE 253 select ACPI_CPU_FREQ_PSS if X86 || IA64 254 default y 255 help 256 This driver adds support for the ACPI Processor package. It is required 257 by several flavors of cpufreq performance-state, thermal, throttling and 258 idle drivers. 259 260 To compile this driver as a module, choose M here: 261 the module will be called processor. 262 263config ACPI_IPMI 264 tristate "IPMI" 265 depends on IPMI_HANDLER 266 default n 267 help 268 This driver enables the ACPI to access the BMC controller. And it 269 uses the IPMI request/response message to communicate with BMC 270 controller, which can be found on on the server. 271 272 To compile this driver as a module, choose M here: 273 the module will be called as acpi_ipmi. 274 275config ACPI_HOTPLUG_CPU 276 bool 277 depends on ACPI_PROCESSOR && HOTPLUG_CPU 278 select ACPI_CONTAINER 279 default y 280 281config ACPI_PROCESSOR_AGGREGATOR 282 tristate "Processor Aggregator" 283 depends on ACPI_PROCESSOR 284 depends on X86 285 help 286 ACPI 4.0 defines processor Aggregator, which enables OS to perform 287 specific processor configuration and control that applies to all 288 processors in the platform. Currently only logical processor idling 289 is defined, which is to reduce power consumption. This driver 290 supports the new device. 291 292config ACPI_THERMAL 293 tristate "Thermal Zone" 294 depends on ACPI_PROCESSOR 295 select THERMAL 296 default y 297 help 298 This driver supports ACPI thermal zones. Most mobile and 299 some desktop systems support ACPI thermal zones. It is HIGHLY 300 recommended that this option be enabled, as your processor(s) 301 may be damaged without it. 302 303 To compile this driver as a module, choose M here: 304 the module will be called thermal. 305 306config ACPI_NUMA 307 bool "NUMA support" 308 depends on NUMA 309 depends on (X86 || IA64 || ARM64) 310 default y if IA64_GENERIC || IA64_SGI_SN2 || ARM64 311 312config ACPI_CUSTOM_DSDT_FILE 313 string "Custom DSDT Table file to include" 314 default "" 315 depends on !STANDALONE 316 help 317 This option supports a custom DSDT by linking it into the kernel. 318 See Documentation/acpi/dsdt-override.txt 319 320 Enter the full path name to the file which includes the AmlCode 321 declaration. 322 323 If unsure, don't enter a file name. 324 325config ACPI_CUSTOM_DSDT 326 bool 327 default ACPI_CUSTOM_DSDT_FILE != "" 328 329config ARCH_HAS_ACPI_TABLE_UPGRADE 330 def_bool n 331 332config ACPI_TABLE_UPGRADE 333 bool "Allow upgrading ACPI tables via initrd" 334 depends on BLK_DEV_INITRD && ARCH_HAS_ACPI_TABLE_UPGRADE 335 default y 336 help 337 This option provides functionality to upgrade arbitrary ACPI tables 338 via initrd. No functional change if no ACPI tables are passed via 339 initrd, therefore it's safe to say Y. 340 See Documentation/acpi/initrd_table_override.txt for details 341 342config ACPI_DEBUG 343 bool "Debug Statements" 344 default n 345 help 346 The ACPI subsystem can produce debug output. Saying Y enables this 347 output and increases the kernel size by around 50K. 348 349 Use the acpi.debug_layer and acpi.debug_level kernel command-line 350 parameters documented in Documentation/acpi/debug.txt and 351 Documentation/admin-guide/kernel-parameters.rst to control the type and 352 amount of debug output. 353 354config ACPI_PCI_SLOT 355 bool "PCI slot detection driver" 356 depends on SYSFS 357 default n 358 help 359 This driver creates entries in /sys/bus/pci/slots/ for all PCI 360 slots in the system. This can help correlate PCI bus addresses, 361 i.e., segment/bus/device/function tuples, with physical slots in 362 the system. If you are unsure, say N. 363 364config X86_PM_TIMER 365 bool "Power Management Timer Support" if EXPERT 366 depends on X86 367 default y 368 help 369 The Power Management Timer is available on all ACPI-capable, 370 in most cases even if ACPI is unusable or blacklisted. 371 372 This timing source is not affected by power management features 373 like aggressive processor idling, throttling, frequency and/or 374 voltage scaling, unlike the commonly used Time Stamp Counter 375 (TSC) timing source. 376 377 You should nearly always say Y here because many modern 378 systems require this timer. 379 380config ACPI_CONTAINER 381 bool "Container and Module Devices" 382 default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU) 383 help 384 This driver supports ACPI Container and Module devices (IDs 385 ACPI0004, PNP0A05, and PNP0A06). 386 387 This helps support hotplug of nodes, CPUs, and memory. 388 389 To compile this driver as a module, choose M here: 390 the module will be called container. 391 392config ACPI_HOTPLUG_MEMORY 393 bool "Memory Hotplug" 394 depends on MEMORY_HOTPLUG 395 help 396 This driver supports ACPI memory hotplug. The driver 397 fields notifications on ACPI memory devices (PNP0C80), 398 which represent memory ranges that may be onlined or 399 offlined during runtime. 400 401 If your hardware and firmware do not support adding or 402 removing memory devices at runtime, you need not enable 403 this driver. 404 405 To compile this driver as a module, choose M here: 406 the module will be called acpi_memhotplug. 407 408config ACPI_HOTPLUG_IOAPIC 409 bool 410 depends on PCI 411 depends on X86_IO_APIC 412 default y 413 414config ACPI_SBS 415 tristate "Smart Battery System" 416 depends on X86 417 select POWER_SUPPLY 418 help 419 This driver supports the Smart Battery System, another 420 type of access to battery information, found on some laptops. 421 422 To compile this driver as a module, choose M here: 423 the modules will be called sbs and sbshc. 424 425config ACPI_HED 426 tristate "Hardware Error Device" 427 help 428 This driver supports the Hardware Error Device (PNP0C33), 429 which is used to report some hardware errors notified via 430 SCI, mainly the corrected errors. 431 432config ACPI_CUSTOM_METHOD 433 tristate "Allow ACPI methods to be inserted/replaced at run time" 434 depends on DEBUG_FS 435 default n 436 help 437 This debug facility allows ACPI AML methods to be inserted and/or 438 replaced without rebooting the system. For details refer to: 439 Documentation/acpi/method-customizing.txt. 440 441 NOTE: This option is security sensitive, because it allows arbitrary 442 kernel memory to be written to by root (uid=0) users, allowing them 443 to bypass certain security measures (e.g. if root is not allowed to 444 load additional kernel modules after boot, this feature may be used 445 to override that restriction). 446 447config ACPI_BGRT 448 bool "Boottime Graphics Resource Table support" 449 depends on EFI && (X86 || ARM64) 450 help 451 This driver adds support for exposing the ACPI Boottime Graphics 452 Resource Table, which allows the operating system to obtain 453 data from the firmware boot splash. It will appear under 454 /sys/firmware/acpi/bgrt/ . 455 456config ACPI_REDUCED_HARDWARE_ONLY 457 bool "Hardware-reduced ACPI support only" if EXPERT 458 def_bool n 459 help 460 This config item changes the way the ACPI code is built. When this 461 option is selected, the kernel will use a specialized version of 462 ACPICA that ONLY supports the ACPI "reduced hardware" mode. The 463 resulting kernel will be smaller but it will also be restricted to 464 running in ACPI reduced hardware mode ONLY. 465 466 If you are unsure what to do, do not enable this option. 467 468source "drivers/acpi/nfit/Kconfig" 469 470source "drivers/acpi/apei/Kconfig" 471source "drivers/acpi/dptf/Kconfig" 472 473config ACPI_WATCHDOG 474 bool 475 476config ACPI_EXTLOG 477 tristate "Extended Error Log support" 478 depends on X86_MCE && X86_LOCAL_APIC && EDAC 479 select UEFI_CPER 480 default n 481 help 482 Certain usages such as Predictive Failure Analysis (PFA) require 483 more information about the error than what can be described in 484 processor machine check banks. Most server processors log 485 additional information about the error in processor uncore 486 registers. Since the addresses and layout of these registers vary 487 widely from one processor to another, system software cannot 488 readily make use of them. To complicate matters further, some of 489 the additional error information cannot be constructed without 490 detailed knowledge about platform topology. 491 492 Enhanced MCA Logging allows firmware to provide additional error 493 information to system software, synchronous with MCE or CMCI. This 494 driver adds support for that functionality with corresponding 495 tracepoint which carries that information to userspace. 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 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" 548endif 549 550config TPS68470_PMIC_OPREGION 551 bool "ACPI operation region support for TPS68470 PMIC" 552 depends on MFD_TPS68470 553 help 554 This config adds ACPI operation region support for TI TPS68470 PMIC. 555 TPS68470 device is an advanced power management unit that powers 556 a Compact Camera Module (CCM), generates clocks for image sensors, 557 drives a dual LED for flash and incorporates two LED drivers for 558 general purpose indicators. 559 This driver enables ACPI operation region support control voltage 560 regulators and clocks. 561 562 This option is a bool as it provides an ACPI operation 563 region, which must be available before any of the devices 564 using this, are probed. 565 566endif # ACPI 567