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 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 <http://www.lesswatts.org/projects/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 co-developed by 35 Hewlett-Packard, Intel, Microsoft, Phoenix, and Toshiba. 36 The specification is available at: 37 <http://www.acpi.info> 38 39if ACPI 40 41config ACPI_SLEEP 42 bool 43 depends on SUSPEND || HIBERNATION 44 default y 45 46config ACPI_PROCFS 47 bool "Deprecated /proc/acpi files" 48 depends on PROC_FS 49 help 50 For backwards compatibility, this option allows 51 deprecated /proc/acpi/ files to exist, even when 52 they have been replaced by functions in /sys. 53 54 This option has no effect on /proc/acpi/ files 55 and functions which do not yet exist in /sys. 56 57 Say N to delete /proc/acpi/ files that have moved to /sys/ 58 59config ACPI_PROCFS_POWER 60 bool "Deprecated power /proc/acpi directories" 61 depends on PROC_FS 62 help 63 For backwards compatibility, this option allows 64 deprecated power /proc/acpi/ directories to exist, even when 65 they have been replaced by functions in /sys. 66 The deprecated directories (and their replacements) include: 67 /proc/acpi/battery/* (/sys/class/power_supply/*) 68 /proc/acpi/ac_adapter/* (sys/class/power_supply/*) 69 This option has no effect on /proc/acpi/ directories 70 and functions, which do not yet exist in /sys 71 This option, together with the proc directories, will be 72 deleted in 2.6.39. 73 74 Say N to delete power /proc/acpi/ directories that have moved to /sys/ 75 76config ACPI_EC_DEBUGFS 77 tristate "EC read/write access through /sys/kernel/debug/ec" 78 default n 79 help 80 Say N to disable Embedded Controller /sys/kernel/debug interface 81 82 Be aware that using this interface can confuse your Embedded 83 Controller in a way that a normal reboot is not enough. You then 84 have to power off your system, and remove the laptop battery for 85 some seconds. 86 An Embedded Controller typically is available on laptops and reads 87 sensor values like battery state and temperature. 88 The kernel accesses the EC through ACPI parsed code provided by BIOS 89 tables. This option allows to access the EC directly without ACPI 90 code being involved. 91 Thus this option is a debug option that helps to write ACPI drivers 92 and can be used to identify ACPI code or EC firmware bugs. 93 94config ACPI_PROC_EVENT 95 bool "Deprecated /proc/acpi/event support" 96 depends on PROC_FS 97 default y 98 help 99 A user-space daemon, acpid, typically reads /proc/acpi/event 100 and handles all ACPI-generated events. 101 102 These events are now delivered to user-space either 103 via the input layer or as netlink events. 104 105 This build option enables the old code for legacy 106 user-space implementation. After some time, this will 107 be moved under CONFIG_ACPI_PROCFS, and then deleted. 108 109 Say Y here to retain the old behaviour. Say N if your 110 user-space is newer than kernel 2.6.23 (September 2007). 111 112config ACPI_AC 113 tristate "AC Adapter" 114 depends on X86 115 select POWER_SUPPLY 116 default y 117 help 118 This driver supports the AC Adapter object, which indicates 119 whether a system is on AC or not. If you have a system that can 120 switch between A/C and battery, say Y. 121 122 To compile this driver as a module, choose M here: 123 the module will be called ac. 124 125config ACPI_BATTERY 126 tristate "Battery" 127 depends on X86 128 select POWER_SUPPLY 129 default y 130 help 131 This driver adds support for battery information through 132 /proc/acpi/battery. If you have a mobile system with a battery, 133 say Y. 134 135 To compile this driver as a module, choose M here: 136 the module will be called battery. 137 138config ACPI_BUTTON 139 tristate "Button" 140 depends on INPUT 141 default y 142 help 143 This driver handles events on the power, sleep, and lid buttons. 144 A daemon reads /proc/acpi/event and perform user-defined actions 145 such as shutting down the system. This is necessary for 146 software-controlled poweroff. 147 148 To compile this driver as a module, choose M here: 149 the module will be called button. 150 151config ACPI_VIDEO 152 tristate "Video" 153 depends on X86 && BACKLIGHT_CLASS_DEVICE && VIDEO_OUTPUT_CONTROL 154 depends on INPUT 155 select THERMAL 156 help 157 This driver implements the ACPI Extensions For Display Adapters 158 for integrated graphics devices on motherboard, as specified in 159 ACPI 2.0 Specification, Appendix B. This supports basic operations 160 such as defining the video POST device, retrieving EDID information, 161 and setting up a video output. 162 163 To compile this driver as a module, choose M here: 164 the module will be called video. 165 166config ACPI_FAN 167 tristate "Fan" 168 select THERMAL 169 default y 170 help 171 This driver supports ACPI fan devices, allowing user-mode 172 applications to perform basic fan control (on, off, status). 173 174 To compile this driver as a module, choose M here: 175 the module will be called fan. 176 177config ACPI_DOCK 178 bool "Dock" 179 depends on EXPERIMENTAL 180 help 181 This driver supports ACPI-controlled docking stations and removable 182 drive bays such as the IBM Ultrabay and the Dell Module Bay. 183 184config ACPI_I2C 185 def_tristate I2C 186 depends on I2C 187 help 188 ACPI I2C enumeration support. 189 190config ACPI_PROCESSOR 191 tristate "Processor" 192 select THERMAL 193 select CPU_IDLE 194 default y 195 help 196 This driver installs ACPI as the idle handler for Linux and uses 197 ACPI C2 and C3 processor states to save power on systems that 198 support it. It is required by several flavors of cpufreq 199 performance-state drivers. 200 201 To compile this driver as a module, choose M here: 202 the module will be called processor. 203config ACPI_IPMI 204 tristate "IPMI" 205 depends on EXPERIMENTAL && IPMI_SI && IPMI_HANDLER 206 default n 207 help 208 This driver enables the ACPI to access the BMC controller. And it 209 uses the IPMI request/response message to communicate with BMC 210 controller, which can be found on on the server. 211 212 To compile this driver as a module, choose M here: 213 the module will be called as acpi_ipmi. 214 215config ACPI_HOTPLUG_CPU 216 bool 217 depends on EXPERIMENTAL && ACPI_PROCESSOR && HOTPLUG_CPU 218 select ACPI_CONTAINER 219 default y 220 221config ACPI_PROCESSOR_AGGREGATOR 222 tristate "Processor Aggregator" 223 depends on ACPI_PROCESSOR 224 depends on EXPERIMENTAL 225 depends on X86 226 help 227 ACPI 4.0 defines processor Aggregator, which enables OS to perform 228 specific processor configuration and control that applies to all 229 processors in the platform. Currently only logical processor idling 230 is defined, which is to reduce power consumption. This driver 231 supports the new device. 232 233config ACPI_THERMAL 234 tristate "Thermal Zone" 235 depends on ACPI_PROCESSOR 236 select THERMAL 237 default y 238 help 239 This driver supports ACPI thermal zones. Most mobile and 240 some desktop systems support ACPI thermal zones. It is HIGHLY 241 recommended that this option be enabled, as your processor(s) 242 may be damaged without it. 243 244 To compile this driver as a module, choose M here: 245 the module will be called thermal. 246 247config ACPI_NUMA 248 bool "NUMA support" 249 depends on NUMA 250 depends on (X86 || IA64) 251 default y if IA64_GENERIC || IA64_SGI_SN2 252 253config ACPI_CUSTOM_DSDT_FILE 254 string "Custom DSDT Table file to include" 255 default "" 256 depends on !STANDALONE 257 help 258 This option supports a custom DSDT by linking it into the kernel. 259 See Documentation/acpi/dsdt-override.txt 260 261 Enter the full path name to the file which includes the AmlCode 262 declaration. 263 264 If unsure, don't enter a file name. 265 266config ACPI_CUSTOM_DSDT 267 bool 268 default ACPI_CUSTOM_DSDT_FILE != "" 269 270config ACPI_INITRD_TABLE_OVERRIDE 271 bool "ACPI tables can be passed via uncompressed cpio in initrd" 272 default n 273 help 274 This option provides functionality to override arbitrary ACPI tables 275 via initrd. No functional change if no ACPI tables are passed via 276 initrd, therefore it's safe to say Y. 277 See Documentation/acpi/initrd_table_override.txt for details 278 279config ACPI_BLACKLIST_YEAR 280 int "Disable ACPI for systems before Jan 1st this year" if X86_32 281 default 0 282 help 283 Enter a 4-digit year, e.g., 2001, to disable ACPI by default 284 on platforms with DMI BIOS date before January 1st that year. 285 "acpi=force" can be used to override this mechanism. 286 287 Enter 0 to disable this mechanism and allow ACPI to 288 run by default no matter what the year. (default) 289 290config ACPI_DEBUG 291 bool "Debug Statements" 292 default n 293 help 294 The ACPI subsystem can produce debug output. Saying Y enables this 295 output and increases the kernel size by around 50K. 296 297 Use the acpi.debug_layer and acpi.debug_level kernel command-line 298 parameters documented in Documentation/acpi/debug.txt and 299 Documentation/kernel-parameters.txt to control the type and 300 amount of debug output. 301 302config ACPI_DEBUG_FUNC_TRACE 303 bool "Additionally enable ACPI function tracing" 304 default n 305 depends on ACPI_DEBUG 306 help 307 ACPI Debug Statements slow down ACPI processing. Function trace 308 is about half of the penalty and is rarely useful. 309 310config ACPI_PCI_SLOT 311 tristate "PCI slot detection driver" 312 depends on SYSFS 313 default n 314 help 315 This driver creates entries in /sys/bus/pci/slots/ for all PCI 316 slots in the system. This can help correlate PCI bus addresses, 317 i.e., segment/bus/device/function tuples, with physical slots in 318 the system. If you are unsure, say N. 319 320 To compile this driver as a module, choose M here: 321 the module will be called pci_slot. 322 323config X86_PM_TIMER 324 bool "Power Management Timer Support" if EXPERT 325 depends on X86 326 default y 327 help 328 The Power Management Timer is available on all ACPI-capable, 329 in most cases even if ACPI is unusable or blacklisted. 330 331 This timing source is not affected by power management features 332 like aggressive processor idling, throttling, frequency and/or 333 voltage scaling, unlike the commonly used Time Stamp Counter 334 (TSC) timing source. 335 336 You should nearly always say Y here because many modern 337 systems require this timer. 338 339config ACPI_CONTAINER 340 tristate "Container and Module Devices (EXPERIMENTAL)" 341 depends on EXPERIMENTAL 342 default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU || ACPI_HOTPLUG_IO) 343 help 344 This driver supports ACPI Container and Module devices (IDs 345 ACPI0004, PNP0A05, and PNP0A06). 346 347 This helps support hotplug of nodes, CPUs, and memory. 348 349 To compile this driver as a module, choose M here: 350 the module will be called container. 351 352config ACPI_HOTPLUG_MEMORY 353 tristate "Memory Hotplug" 354 depends on MEMORY_HOTPLUG 355 default n 356 help 357 This driver supports ACPI memory hotplug. The driver 358 fields notifications on ACPI memory devices (PNP0C80), 359 which represent memory ranges that may be onlined or 360 offlined during runtime. 361 362 If your hardware and firmware do not support adding or 363 removing memory devices at runtime, you need not enable 364 this driver. 365 366 To compile this driver as a module, choose M here: 367 the module will be called acpi_memhotplug. 368 369config ACPI_SBS 370 tristate "Smart Battery System" 371 depends on X86 372 select POWER_SUPPLY 373 help 374 This driver supports the Smart Battery System, another 375 type of access to battery information, found on some laptops. 376 377 To compile this driver as a module, choose M here: 378 the modules will be called sbs and sbshc. 379 380config ACPI_HED 381 tristate "Hardware Error Device" 382 help 383 This driver supports the Hardware Error Device (PNP0C33), 384 which is used to report some hardware errors notified via 385 SCI, mainly the corrected errors. 386 387config ACPI_CUSTOM_METHOD 388 tristate "Allow ACPI methods to be inserted/replaced at run time" 389 depends on DEBUG_FS 390 default n 391 help 392 This debug facility allows ACPI AML methods to be inserted and/or 393 replaced without rebooting the system. For details refer to: 394 Documentation/acpi/method-customizing.txt. 395 396 NOTE: This option is security sensitive, because it allows arbitrary 397 kernel memory to be written to by root (uid=0) users, allowing them 398 to bypass certain security measures (e.g. if root is not allowed to 399 load additional kernel modules after boot, this feature may be used 400 to override that restriction). 401 402config ACPI_BGRT 403 bool "Boottime Graphics Resource Table support" 404 depends on EFI 405 help 406 This driver adds support for exposing the ACPI Boottime Graphics 407 Resource Table, which allows the operating system to obtain 408 data from the firmware boot splash. It will appear under 409 /sys/firmware/acpi/bgrt/ . 410 411source "drivers/acpi/apei/Kconfig" 412 413endif # ACPI 414