1# 2# ACPI Configuration 3# 4 5menuconfig ACPI 6 bool "ACPI (Advanced Configuration and Power Interface) Support" 7 depends on !IA64_HP_SIM 8 depends on IA64 || X86 || (ARM64 && EXPERT) 9 depends on PCI 10 select PNP 11 default y 12 help 13 Advanced Configuration and Power Interface (ACPI) support for 14 Linux requires an ACPI-compliant platform (hardware/firmware), 15 and assumes the presence of OS-directed configuration and power 16 management (OSPM) software. This option will enlarge your 17 kernel by about 70K. 18 19 Linux ACPI provides a robust functional replacement for several 20 legacy configuration and power management interfaces, including 21 the Plug-and-Play BIOS specification (PnP BIOS), the 22 MultiProcessor Specification (MPS), and the Advanced Power 23 Management (APM) specification. If both ACPI and APM support 24 are configured, ACPI is used. 25 26 The project home page for the Linux ACPI subsystem is here: 27 <https://01.org/linux-acpi> 28 29 Linux support for ACPI is based on Intel Corporation's ACPI 30 Component Architecture (ACPI CA). For more information on the 31 ACPI CA, see: 32 <http://acpica.org/> 33 34 ACPI is an open industry specification originally co-developed by 35 Hewlett-Packard, Intel, Microsoft, Phoenix, and Toshiba. Currently, 36 it is developed by the ACPI Specification Working Group (ASWG) under 37 the UEFI Forum and any UEFI member can join the ASWG and contribute 38 to the ACPI specification. 39 The specification is available at: 40 <http://www.acpi.info> 41 <http://www.uefi.org/acpi/specs> 42 43if ACPI 44 45config ACPI_LEGACY_TABLES_LOOKUP 46 bool 47 48config ARCH_MIGHT_HAVE_ACPI_PDC 49 bool 50 51config ACPI_GENERIC_GSI 52 bool 53 54config ACPI_SYSTEM_POWER_STATES_SUPPORT 55 bool 56 57config ACPI_CCA_REQUIRED 58 bool 59 60config ACPI_SLEEP 61 bool 62 depends on SUSPEND || HIBERNATION 63 depends on ACPI_SYSTEM_POWER_STATES_SUPPORT 64 default y 65 66config ACPI_PROCFS_POWER 67 bool "Deprecated power /proc/acpi directories" 68 depends on X86 && PROC_FS 69 help 70 For backwards compatibility, this option allows 71 deprecated power /proc/acpi/ directories to exist, even when 72 they have been replaced by functions in /sys. 73 The deprecated directories (and their replacements) include: 74 /proc/acpi/battery/* (/sys/class/power_supply/*) 75 /proc/acpi/ac_adapter/* (sys/class/power_supply/*) 76 This option has no effect on /proc/acpi/ directories 77 and functions, which do not yet exist in /sys 78 This option, together with the proc directories, will be 79 deleted in the future. 80 81 Say N to delete power /proc/acpi/ directories that have moved to /sys/ 82 83config ACPI_REV_OVERRIDE_POSSIBLE 84 bool "Allow supported ACPI revision to be overriden" 85 depends on X86 86 default y 87 help 88 The platform firmware on some systems expects Linux to return "5" as 89 the supported ACPI revision which makes it expose system configuration 90 information in a special way. 91 92 For example, based on what ACPI exports as the supported revision, 93 Dell XPS 13 (2015) configures its audio device to either work in HDA 94 mode or in I2S mode, where the former is supposed to be used on Linux 95 until the latter is fully supported (in the kernel as well as in user 96 space). 97 98 This option enables a DMI-based quirk for the above Dell machine (so 99 that HDA audio is exposed by the platform firmware to the kernel) and 100 makes it possible to force the kernel to return "5" as the supported 101 ACPI revision via the "acpi_rev_override" command line switch. 102 103config ACPI_EC_DEBUGFS 104 tristate "EC read/write access through /sys/kernel/debug/ec" 105 default n 106 help 107 Say N to disable Embedded Controller /sys/kernel/debug interface 108 109 Be aware that using this interface can confuse your Embedded 110 Controller in a way that a normal reboot is not enough. You then 111 have to power off your system, and remove the laptop battery for 112 some seconds. 113 An Embedded Controller typically is available on laptops and reads 114 sensor values like battery state and temperature. 115 The kernel accesses the EC through ACPI parsed code provided by BIOS 116 tables. This option allows to access the EC directly without ACPI 117 code being involved. 118 Thus this option is a debug option that helps to write ACPI drivers 119 and can be used to identify ACPI code or EC firmware bugs. 120 121config ACPI_AC 122 tristate "AC Adapter" 123 depends on X86 124 select POWER_SUPPLY 125 default y 126 help 127 This driver supports the AC Adapter object, which indicates 128 whether a system is on AC or not. If you have a system that can 129 switch between A/C and battery, say Y. 130 131 To compile this driver as a module, choose M here: 132 the module will be called ac. 133 134config ACPI_BATTERY 135 tristate "Battery" 136 depends on X86 137 select POWER_SUPPLY 138 default y 139 help 140 This driver adds support for battery information through 141 /proc/acpi/battery. If you have a mobile system with a battery, 142 say Y. 143 144 To compile this driver as a module, choose M here: 145 the module will be called battery. 146 147config ACPI_BUTTON 148 tristate "Button" 149 depends on INPUT 150 default y 151 help 152 This driver handles events on the power, sleep, and lid buttons. 153 A daemon reads events from input devices or via netlink and 154 performs user-defined actions such as shutting down the system. 155 This is necessary for software-controlled poweroff. 156 157 To compile this driver as a module, choose M here: 158 the module will be called button. 159 160config ACPI_VIDEO 161 tristate "Video" 162 depends on X86 && BACKLIGHT_CLASS_DEVICE 163 depends on INPUT 164 select THERMAL 165 help 166 This driver implements the ACPI Extensions For Display Adapters 167 for integrated graphics devices on motherboard, as specified in 168 ACPI 2.0 Specification, Appendix B. This supports basic operations 169 such as defining the video POST device, retrieving EDID information, 170 and setting up a video output. 171 172 To compile this driver as a module, choose M here: 173 the module will be called video. 174 175config ACPI_FAN 176 tristate "Fan" 177 depends on THERMAL 178 default y 179 help 180 This driver supports ACPI fan devices, allowing user-mode 181 applications to perform basic fan control (on, off, status). 182 183 To compile this driver as a module, choose M here: 184 the module will be called fan. 185 186config ACPI_DOCK 187 bool "Dock" 188 help 189 This driver supports ACPI-controlled docking stations and removable 190 drive bays such as the IBM Ultrabay and the Dell Module Bay. 191 192config ACPI_PROCESSOR 193 tristate "Processor" 194 select THERMAL 195 select CPU_IDLE 196 depends on X86 || IA64 197 default y 198 help 199 This driver installs ACPI as the idle handler for Linux and uses 200 ACPI C2 and C3 processor states to save power on systems that 201 support it. It is required by several flavors of cpufreq 202 performance-state drivers. 203 204 To compile this driver as a module, choose M here: 205 the module will be called processor. 206 207config ACPI_IPMI 208 tristate "IPMI" 209 depends on IPMI_SI 210 default n 211 help 212 This driver enables the ACPI to access the BMC controller. And it 213 uses the IPMI request/response message to communicate with BMC 214 controller, which can be found on on the server. 215 216 To compile this driver as a module, choose M here: 217 the module will be called as acpi_ipmi. 218 219config ACPI_HOTPLUG_CPU 220 bool 221 depends on ACPI_PROCESSOR && HOTPLUG_CPU 222 select ACPI_CONTAINER 223 default y 224 225config ACPI_PROCESSOR_AGGREGATOR 226 tristate "Processor Aggregator" 227 depends on ACPI_PROCESSOR 228 depends on X86 229 help 230 ACPI 4.0 defines processor Aggregator, which enables OS to perform 231 specific processor configuration and control that applies to all 232 processors in the platform. Currently only logical processor idling 233 is defined, which is to reduce power consumption. This driver 234 supports the new device. 235 236config ACPI_THERMAL 237 tristate "Thermal Zone" 238 depends on ACPI_PROCESSOR 239 select THERMAL 240 default y 241 help 242 This driver supports ACPI thermal zones. Most mobile and 243 some desktop systems support ACPI thermal zones. It is HIGHLY 244 recommended that this option be enabled, as your processor(s) 245 may be damaged without it. 246 247 To compile this driver as a module, choose M here: 248 the module will be called thermal. 249 250config ACPI_NUMA 251 bool "NUMA support" 252 depends on NUMA 253 depends on (X86 || IA64) 254 default y if IA64_GENERIC || IA64_SGI_SN2 255 256config ACPI_CUSTOM_DSDT_FILE 257 string "Custom DSDT Table file to include" 258 default "" 259 depends on !STANDALONE 260 help 261 This option supports a custom DSDT by linking it into the kernel. 262 See Documentation/acpi/dsdt-override.txt 263 264 Enter the full path name to the file which includes the AmlCode 265 declaration. 266 267 If unsure, don't enter a file name. 268 269config ACPI_CUSTOM_DSDT 270 bool 271 default ACPI_CUSTOM_DSDT_FILE != "" 272 273config ACPI_INITRD_TABLE_OVERRIDE 274 bool "ACPI tables override via initrd" 275 depends on BLK_DEV_INITRD && X86 276 default n 277 help 278 This option provides functionality to override arbitrary ACPI tables 279 via initrd. No functional change if no ACPI tables are passed via 280 initrd, therefore it's safe to say Y. 281 See Documentation/acpi/initrd_table_override.txt for details 282 283config ACPI_DEBUG 284 bool "Debug Statements" 285 default n 286 help 287 The ACPI subsystem can produce debug output. Saying Y enables this 288 output and increases the kernel size by around 50K. 289 290 Use the acpi.debug_layer and acpi.debug_level kernel command-line 291 parameters documented in Documentation/acpi/debug.txt and 292 Documentation/kernel-parameters.txt to control the type and 293 amount of debug output. 294 295config ACPI_PCI_SLOT 296 bool "PCI slot detection driver" 297 depends on SYSFS 298 default n 299 help 300 This driver creates entries in /sys/bus/pci/slots/ for all PCI 301 slots in the system. This can help correlate PCI bus addresses, 302 i.e., segment/bus/device/function tuples, with physical slots in 303 the system. If you are unsure, say N. 304 305config X86_PM_TIMER 306 bool "Power Management Timer Support" if EXPERT 307 depends on X86 308 default y 309 help 310 The Power Management Timer is available on all ACPI-capable, 311 in most cases even if ACPI is unusable or blacklisted. 312 313 This timing source is not affected by power management features 314 like aggressive processor idling, throttling, frequency and/or 315 voltage scaling, unlike the commonly used Time Stamp Counter 316 (TSC) timing source. 317 318 You should nearly always say Y here because many modern 319 systems require this timer. 320 321config ACPI_CONTAINER 322 bool "Container and Module Devices" 323 default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU) 324 help 325 This driver supports ACPI Container and Module devices (IDs 326 ACPI0004, PNP0A05, and PNP0A06). 327 328 This helps support hotplug of nodes, CPUs, and memory. 329 330 To compile this driver as a module, choose M here: 331 the module will be called container. 332 333config ACPI_HOTPLUG_MEMORY 334 bool "Memory Hotplug" 335 depends on MEMORY_HOTPLUG 336 help 337 This driver supports ACPI memory hotplug. The driver 338 fields notifications on ACPI memory devices (PNP0C80), 339 which represent memory ranges that may be onlined or 340 offlined during runtime. 341 342 If your hardware and firmware do not support adding or 343 removing memory devices at runtime, you need not enable 344 this driver. 345 346 To compile this driver as a module, choose M here: 347 the module will be called acpi_memhotplug. 348 349config ACPI_HOTPLUG_IOAPIC 350 bool 351 depends on PCI 352 depends on X86_IO_APIC 353 default y 354 355config ACPI_SBS 356 tristate "Smart Battery System" 357 depends on X86 358 select POWER_SUPPLY 359 help 360 This driver supports the Smart Battery System, another 361 type of access to battery information, found on some laptops. 362 363 To compile this driver as a module, choose M here: 364 the modules will be called sbs and sbshc. 365 366config ACPI_HED 367 tristate "Hardware Error Device" 368 help 369 This driver supports the Hardware Error Device (PNP0C33), 370 which is used to report some hardware errors notified via 371 SCI, mainly the corrected errors. 372 373config ACPI_CUSTOM_METHOD 374 tristate "Allow ACPI methods to be inserted/replaced at run time" 375 depends on DEBUG_FS 376 default n 377 help 378 This debug facility allows ACPI AML methods to be inserted and/or 379 replaced without rebooting the system. For details refer to: 380 Documentation/acpi/method-customizing.txt. 381 382 NOTE: This option is security sensitive, because it allows arbitrary 383 kernel memory to be written to by root (uid=0) users, allowing them 384 to bypass certain security measures (e.g. if root is not allowed to 385 load additional kernel modules after boot, this feature may be used 386 to override that restriction). 387 388config ACPI_BGRT 389 bool "Boottime Graphics Resource Table support" 390 depends on EFI && X86 391 help 392 This driver adds support for exposing the ACPI Boottime Graphics 393 Resource Table, which allows the operating system to obtain 394 data from the firmware boot splash. It will appear under 395 /sys/firmware/acpi/bgrt/ . 396 397config ACPI_REDUCED_HARDWARE_ONLY 398 bool "Hardware-reduced ACPI support only" if EXPERT 399 def_bool n 400 help 401 This config item changes the way the ACPI code is built. When this 402 option is selected, the kernel will use a specialized version of 403 ACPICA that ONLY supports the ACPI "reduced hardware" mode. The 404 resulting kernel will be smaller but it will also be restricted to 405 running in ACPI reduced hardware mode ONLY. 406 407 If you are unsure what to do, do not enable this option. 408 409config ACPI_NFIT 410 tristate "ACPI NVDIMM Firmware Interface Table (NFIT)" 411 depends on PHYS_ADDR_T_64BIT 412 depends on BLK_DEV 413 select LIBNVDIMM 414 help 415 Infrastructure to probe ACPI 6 compliant platforms for 416 NVDIMMs (NFIT) and register a libnvdimm device tree. In 417 addition to storage devices this also enables libnvdimm to pass 418 ACPI._DSM messages for platform/dimm configuration. 419 420 To compile this driver as a module, choose M here: 421 the module will be called nfit. 422 423config ACPI_NFIT_DEBUG 424 bool "NFIT DSM debug" 425 depends on ACPI_NFIT 426 depends on DYNAMIC_DEBUG 427 default n 428 help 429 Enabling this option causes the nfit driver to dump the 430 input and output buffers of _DSM operations on the ACPI0012 431 device and its children. This can be very verbose, so leave 432 it disabled unless you are debugging a hardware / firmware 433 issue. 434 435source "drivers/acpi/apei/Kconfig" 436 437config ACPI_EXTLOG 438 tristate "Extended Error Log support" 439 depends on X86_MCE && X86_LOCAL_APIC 440 select UEFI_CPER 441 select RAS 442 default n 443 help 444 Certain usages such as Predictive Failure Analysis (PFA) require 445 more information about the error than what can be described in 446 processor machine check banks. Most server processors log 447 additional information about the error in processor uncore 448 registers. Since the addresses and layout of these registers vary 449 widely from one processor to another, system software cannot 450 readily make use of them. To complicate matters further, some of 451 the additional error information cannot be constructed without 452 detailed knowledge about platform topology. 453 454 Enhanced MCA Logging allows firmware to provide additional error 455 information to system software, synchronous with MCE or CMCI. This 456 driver adds support for that functionality with corresponding 457 tracepoint which carries that information to userspace. 458 459menuconfig PMIC_OPREGION 460 bool "PMIC (Power Management Integrated Circuit) operation region support" 461 help 462 Select this option to enable support for ACPI operation 463 region of the PMIC chip. The operation region can be used 464 to control power rails and sensor reading/writing on the 465 PMIC chip. 466 467if PMIC_OPREGION 468config CRC_PMIC_OPREGION 469 bool "ACPI operation region support for CrystalCove PMIC" 470 depends on INTEL_SOC_PMIC 471 help 472 This config adds ACPI operation region support for CrystalCove PMIC. 473 474config XPOWER_PMIC_OPREGION 475 bool "ACPI operation region support for XPower AXP288 PMIC" 476 depends on AXP288_ADC = y 477 help 478 This config adds ACPI operation region support for XPower AXP288 PMIC. 479 480endif 481 482endif # ACPI 483