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_SLEEP 58 bool 59 depends on SUSPEND || HIBERNATION 60 depends on ACPI_SYSTEM_POWER_STATES_SUPPORT 61 default y 62 63config ACPI_PROCFS_POWER 64 bool "Deprecated power /proc/acpi directories" 65 depends on PROC_FS 66 help 67 For backwards compatibility, this option allows 68 deprecated power /proc/acpi/ directories to exist, even when 69 they have been replaced by functions in /sys. 70 The deprecated directories (and their replacements) include: 71 /proc/acpi/battery/* (/sys/class/power_supply/*) 72 /proc/acpi/ac_adapter/* (sys/class/power_supply/*) 73 This option has no effect on /proc/acpi/ directories 74 and functions, which do not yet exist in /sys 75 This option, together with the proc directories, will be 76 deleted in the future. 77 78 Say N to delete power /proc/acpi/ directories that have moved to /sys/ 79 80config ACPI_EC_DEBUGFS 81 tristate "EC read/write access through /sys/kernel/debug/ec" 82 default n 83 help 84 Say N to disable Embedded Controller /sys/kernel/debug interface 85 86 Be aware that using this interface can confuse your Embedded 87 Controller in a way that a normal reboot is not enough. You then 88 have to power off your system, and remove the laptop battery for 89 some seconds. 90 An Embedded Controller typically is available on laptops and reads 91 sensor values like battery state and temperature. 92 The kernel accesses the EC through ACPI parsed code provided by BIOS 93 tables. This option allows to access the EC directly without ACPI 94 code being involved. 95 Thus this option is a debug option that helps to write ACPI drivers 96 and can be used to identify ACPI code or EC firmware bugs. 97 98config ACPI_AC 99 tristate "AC Adapter" 100 depends on X86 101 select POWER_SUPPLY 102 default y 103 help 104 This driver supports the AC Adapter object, which indicates 105 whether a system is on AC or not. If you have a system that can 106 switch between A/C and battery, say Y. 107 108 To compile this driver as a module, choose M here: 109 the module will be called ac. 110 111config ACPI_BATTERY 112 tristate "Battery" 113 depends on X86 114 select POWER_SUPPLY 115 default y 116 help 117 This driver adds support for battery information through 118 /proc/acpi/battery. If you have a mobile system with a battery, 119 say Y. 120 121 To compile this driver as a module, choose M here: 122 the module will be called battery. 123 124config ACPI_BUTTON 125 tristate "Button" 126 depends on INPUT 127 default y 128 help 129 This driver handles events on the power, sleep, and lid buttons. 130 A daemon reads events from input devices or via netlink and 131 performs user-defined actions such as shutting down the system. 132 This is necessary for software-controlled poweroff. 133 134 To compile this driver as a module, choose M here: 135 the module will be called button. 136 137config ACPI_VIDEO 138 tristate "Video" 139 depends on X86 && BACKLIGHT_CLASS_DEVICE 140 depends on INPUT 141 select THERMAL 142 help 143 This driver implements the ACPI Extensions For Display Adapters 144 for integrated graphics devices on motherboard, as specified in 145 ACPI 2.0 Specification, Appendix B. This supports basic operations 146 such as defining the video POST device, retrieving EDID information, 147 and setting up a video output. 148 149 To compile this driver as a module, choose M here: 150 the module will be called video. 151 152config ACPI_FAN 153 tristate "Fan" 154 depends on THERMAL 155 default y 156 help 157 This driver supports ACPI fan devices, allowing user-mode 158 applications to perform basic fan control (on, off, status). 159 160 To compile this driver as a module, choose M here: 161 the module will be called fan. 162 163config ACPI_DOCK 164 bool "Dock" 165 help 166 This driver supports ACPI-controlled docking stations and removable 167 drive bays such as the IBM Ultrabay and the Dell Module Bay. 168 169config ACPI_PROCESSOR 170 tristate "Processor" 171 select THERMAL 172 select CPU_IDLE 173 depends on X86 || IA64 174 default y 175 help 176 This driver installs ACPI as the idle handler for Linux and uses 177 ACPI C2 and C3 processor states to save power on systems that 178 support it. It is required by several flavors of cpufreq 179 performance-state drivers. 180 181 To compile this driver as a module, choose M here: 182 the module will be called processor. 183 184config ACPI_IPMI 185 tristate "IPMI" 186 depends on IPMI_SI 187 default n 188 help 189 This driver enables the ACPI to access the BMC controller. And it 190 uses the IPMI request/response message to communicate with BMC 191 controller, which can be found on on the server. 192 193 To compile this driver as a module, choose M here: 194 the module will be called as acpi_ipmi. 195 196config ACPI_HOTPLUG_CPU 197 bool 198 depends on ACPI_PROCESSOR && HOTPLUG_CPU 199 select ACPI_CONTAINER 200 default y 201 202config ACPI_PROCESSOR_AGGREGATOR 203 tristate "Processor Aggregator" 204 depends on ACPI_PROCESSOR 205 depends on X86 206 help 207 ACPI 4.0 defines processor Aggregator, which enables OS to perform 208 specific processor configuration and control that applies to all 209 processors in the platform. Currently only logical processor idling 210 is defined, which is to reduce power consumption. This driver 211 supports the new device. 212 213config ACPI_THERMAL 214 tristate "Thermal Zone" 215 depends on ACPI_PROCESSOR 216 select THERMAL 217 default y 218 help 219 This driver supports ACPI thermal zones. Most mobile and 220 some desktop systems support ACPI thermal zones. It is HIGHLY 221 recommended that this option be enabled, as your processor(s) 222 may be damaged without it. 223 224 To compile this driver as a module, choose M here: 225 the module will be called thermal. 226 227config ACPI_NUMA 228 bool "NUMA support" 229 depends on NUMA 230 depends on (X86 || IA64) 231 default y if IA64_GENERIC || IA64_SGI_SN2 232 233config ACPI_CUSTOM_DSDT_FILE 234 string "Custom DSDT Table file to include" 235 default "" 236 depends on !STANDALONE 237 help 238 This option supports a custom DSDT by linking it into the kernel. 239 See Documentation/acpi/dsdt-override.txt 240 241 Enter the full path name to the file which includes the AmlCode 242 declaration. 243 244 If unsure, don't enter a file name. 245 246config ACPI_CUSTOM_DSDT 247 bool 248 default ACPI_CUSTOM_DSDT_FILE != "" 249 250config ACPI_INITRD_TABLE_OVERRIDE 251 bool "ACPI tables override via initrd" 252 depends on BLK_DEV_INITRD && X86 253 default n 254 help 255 This option provides functionality to override arbitrary ACPI tables 256 via initrd. No functional change if no ACPI tables are passed via 257 initrd, therefore it's safe to say Y. 258 See Documentation/acpi/initrd_table_override.txt for details 259 260config ACPI_DEBUG 261 bool "Debug Statements" 262 default n 263 help 264 The ACPI subsystem can produce debug output. Saying Y enables this 265 output and increases the kernel size by around 50K. 266 267 Use the acpi.debug_layer and acpi.debug_level kernel command-line 268 parameters documented in Documentation/acpi/debug.txt and 269 Documentation/kernel-parameters.txt to control the type and 270 amount of debug output. 271 272config ACPI_PCI_SLOT 273 bool "PCI slot detection driver" 274 depends on SYSFS 275 default n 276 help 277 This driver creates entries in /sys/bus/pci/slots/ for all PCI 278 slots in the system. This can help correlate PCI bus addresses, 279 i.e., segment/bus/device/function tuples, with physical slots in 280 the system. If you are unsure, say N. 281 282config X86_PM_TIMER 283 bool "Power Management Timer Support" if EXPERT 284 depends on X86 285 default y 286 help 287 The Power Management Timer is available on all ACPI-capable, 288 in most cases even if ACPI is unusable or blacklisted. 289 290 This timing source is not affected by power management features 291 like aggressive processor idling, throttling, frequency and/or 292 voltage scaling, unlike the commonly used Time Stamp Counter 293 (TSC) timing source. 294 295 You should nearly always say Y here because many modern 296 systems require this timer. 297 298config ACPI_CONTAINER 299 bool "Container and Module Devices" 300 default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU) 301 help 302 This driver supports ACPI Container and Module devices (IDs 303 ACPI0004, PNP0A05, and PNP0A06). 304 305 This helps support hotplug of nodes, CPUs, and memory. 306 307 To compile this driver as a module, choose M here: 308 the module will be called container. 309 310config ACPI_HOTPLUG_MEMORY 311 bool "Memory Hotplug" 312 depends on MEMORY_HOTPLUG 313 help 314 This driver supports ACPI memory hotplug. The driver 315 fields notifications on ACPI memory devices (PNP0C80), 316 which represent memory ranges that may be onlined or 317 offlined during runtime. 318 319 If your hardware and firmware do not support adding or 320 removing memory devices at runtime, you need not enable 321 this driver. 322 323 To compile this driver as a module, choose M here: 324 the module will be called acpi_memhotplug. 325 326config ACPI_HOTPLUG_IOAPIC 327 bool 328 depends on PCI 329 depends on X86_IO_APIC 330 default y 331 332config ACPI_SBS 333 tristate "Smart Battery System" 334 depends on X86 335 select POWER_SUPPLY 336 help 337 This driver supports the Smart Battery System, another 338 type of access to battery information, found on some laptops. 339 340 To compile this driver as a module, choose M here: 341 the modules will be called sbs and sbshc. 342 343config ACPI_HED 344 tristate "Hardware Error Device" 345 help 346 This driver supports the Hardware Error Device (PNP0C33), 347 which is used to report some hardware errors notified via 348 SCI, mainly the corrected errors. 349 350config ACPI_CUSTOM_METHOD 351 tristate "Allow ACPI methods to be inserted/replaced at run time" 352 depends on DEBUG_FS 353 default n 354 help 355 This debug facility allows ACPI AML methods to be inserted and/or 356 replaced without rebooting the system. For details refer to: 357 Documentation/acpi/method-customizing.txt. 358 359 NOTE: This option is security sensitive, because it allows arbitrary 360 kernel memory to be written to by root (uid=0) users, allowing them 361 to bypass certain security measures (e.g. if root is not allowed to 362 load additional kernel modules after boot, this feature may be used 363 to override that restriction). 364 365config ACPI_BGRT 366 bool "Boottime Graphics Resource Table support" 367 depends on EFI && X86 368 help 369 This driver adds support for exposing the ACPI Boottime Graphics 370 Resource Table, which allows the operating system to obtain 371 data from the firmware boot splash. It will appear under 372 /sys/firmware/acpi/bgrt/ . 373 374config ACPI_REDUCED_HARDWARE_ONLY 375 bool "Hardware-reduced ACPI support only" if EXPERT 376 def_bool n 377 help 378 This config item changes the way the ACPI code is built. When this 379 option is selected, the kernel will use a specialized version of 380 ACPICA that ONLY supports the ACPI "reduced hardware" mode. The 381 resulting kernel will be smaller but it will also be restricted to 382 running in ACPI reduced hardware mode ONLY. 383 384 If you are unsure what to do, do not enable this option. 385 386source "drivers/acpi/apei/Kconfig" 387 388config ACPI_EXTLOG 389 tristate "Extended Error Log support" 390 depends on X86_MCE && X86_LOCAL_APIC 391 select UEFI_CPER 392 select RAS 393 default n 394 help 395 Certain usages such as Predictive Failure Analysis (PFA) require 396 more information about the error than what can be described in 397 processor machine check banks. Most server processors log 398 additional information about the error in processor uncore 399 registers. Since the addresses and layout of these registers vary 400 widely from one processor to another, system software cannot 401 readily make use of them. To complicate matters further, some of 402 the additional error information cannot be constructed without 403 detailed knowledge about platform topology. 404 405 Enhanced MCA Logging allows firmware to provide additional error 406 information to system software, synchronous with MCE or CMCI. This 407 driver adds support for that functionality with corresponding 408 tracepoint which carries that information to userspace. 409 410menuconfig PMIC_OPREGION 411 bool "PMIC (Power Management Integrated Circuit) operation region support" 412 help 413 Select this option to enable support for ACPI operation 414 region of the PMIC chip. The operation region can be used 415 to control power rails and sensor reading/writing on the 416 PMIC chip. 417 418if PMIC_OPREGION 419config CRC_PMIC_OPREGION 420 bool "ACPI operation region support for CrystalCove PMIC" 421 depends on INTEL_SOC_PMIC 422 help 423 This config adds ACPI operation region support for CrystalCove PMIC. 424 425config XPOWER_PMIC_OPREGION 426 bool "ACPI operation region support for XPower AXP288 PMIC" 427 depends on AXP288_ADC = y 428 help 429 This config adds ACPI operation region support for XPower AXP288 PMIC. 430 431endif 432 433endif # ACPI 434