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50 For backwards compatibility, this option allows 51 deprecated /proc/acpi/ files to exist, even when 52 they have been replaced by functions in /sys. 53 54 This option has no effect on /proc/acpi/ files 55 and functions which do not yet exist in /sys. 56 57 Say N to delete /proc/acpi/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compatibility, this option allows 64 deprecated power /proc/acpi/ directories to exist, even when 65 they have been replaced by functions in /sys. 66 The deprecated directories (and their replacements) include: 67 /proc/acpi/battery/* (/sys/class/power_supply/*) 68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_PROCESSOR 185 tristate "Processor" 186 select THERMAL 187 select CPU_IDLE 188 default y 189 help 190 This driver installs ACPI as the idle handler for Linux and uses 191 ACPI C2 and C3 processor states to save power on systems that 192 support it. It is required by several flavors of cpufreq 193 performance-state drivers. 194 195 To compile this driver as a module, choose M here: 196 the module will be called processor. 197config ACPI_IPMI 198 tristate "IPMI" 199 depends on EXPERIMENTAL && IPMI_SI && IPMI_HANDLER 200 default n 201 help 202 This driver enables the ACPI to access the BMC controller. And it 203 uses the IPMI request/response message to communicate with BMC 204 controller, which can be found on on the server. 205 206 To compile this driver as a module, choose M here: 207 the module will be called as acpi_ipmi. 208 209config ACPI_HOTPLUG_CPU 210 bool 211 depends on ACPI_PROCESSOR && HOTPLUG_CPU 212 select ACPI_CONTAINER 213 default y 214 215config ACPI_PROCESSOR_AGGREGATOR 216 tristate "Processor Aggregator" 217 depends on ACPI_PROCESSOR 218 depends on EXPERIMENTAL 219 depends on X86 220 help 221 ACPI 4.0 defines processor Aggregator, which enables OS to perform 222 specific processor configuration and control that applies to all 223 processors in the platform. Currently only logical processor idling 224 is defined, which is to reduce power consumption. This driver 225 supports the new device. 226 227config ACPI_THERMAL 228 tristate "Thermal Zone" 229 depends on ACPI_PROCESSOR 230 select THERMAL 231 default y 232 help 233 This driver supports ACPI thermal zones. Most mobile and 234 some desktop systems support ACPI thermal zones. It is HIGHLY 235 recommended that this option be enabled, as your processor(s) 236 may be damaged without it. 237 238 To compile this driver as a module, choose M here: 239 the module will be called thermal. 240 241config ACPI_NUMA 242 bool "NUMA support" 243 depends on NUMA 244 depends on (X86 || IA64) 245 default y if IA64_GENERIC || IA64_SGI_SN2 246 247config ACPI_CUSTOM_DSDT_FILE 248 string "Custom DSDT Table file to include" 249 default "" 250 depends on !STANDALONE 251 help 252 This option supports a custom DSDT by linking it into the kernel. 253 See Documentation/acpi/dsdt-override.txt 254 255 Enter the full path name to the file which includes the AmlCode 256 declaration. 257 258 If unsure, don't enter a file name. 259 260config ACPI_CUSTOM_DSDT 261 bool 262 default ACPI_CUSTOM_DSDT_FILE != "" 263 264config ACPI_BLACKLIST_YEAR 265 int "Disable ACPI for systems before Jan 1st this year" if X86_32 266 default 0 267 help 268 Enter a 4-digit year, e.g., 2001, to disable ACPI by default 269 on platforms with DMI BIOS date before January 1st that year. 270 "acpi=force" can be used to override this mechanism. 271 272 Enter 0 to disable this mechanism and allow ACPI to 273 run by default no matter what the year. (default) 274 275config ACPI_DEBUG 276 bool "Debug Statements" 277 default n 278 help 279 The ACPI subsystem can produce debug output. Saying Y enables this 280 output and increases the kernel size by around 50K. 281 282 Use the acpi.debug_layer and acpi.debug_level kernel command-line 283 parameters documented in Documentation/acpi/debug.txt and 284 Documentation/kernel-parameters.txt to control the type and 285 amount of debug output. 286 287config ACPI_DEBUG_FUNC_TRACE 288 bool "Additionally enable ACPI function tracing" 289 default n 290 depends on ACPI_DEBUG 291 help 292 ACPI Debug Statements slow down ACPI processing. Function trace 293 is about half of the penalty and is rarely useful. 294 295config ACPI_PCI_SLOT 296 tristate "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. 304 305 To compile this driver as a module, choose M here: 306 the module will be called pci_slot. 307 308config X86_PM_TIMER 309 bool "Power Management Timer Support" if EXPERT 310 depends on X86 311 default y 312 help 313 The Power Management Timer is available on all ACPI-capable, 314 in most cases even if ACPI is unusable or blacklisted. 315 316 This timing source is not affected by power management features 317 like aggressive processor idling, throttling, frequency and/or 318 voltage scaling, unlike the commonly used Time Stamp Counter 319 (TSC) timing source. 320 321 You should nearly always say Y here because many modern 322 systems require this timer. 323 324config ACPI_CONTAINER 325 tristate "Container and Module Devices (EXPERIMENTAL)" 326 depends on EXPERIMENTAL 327 default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU || ACPI_HOTPLUG_IO) 328 help 329 This driver supports ACPI Container and Module devices (IDs 330 ACPI0004, PNP0A05, and PNP0A06). 331 332 This helps support hotplug of nodes, CPUs, and memory. 333 334 To compile this driver as a module, choose M here: 335 the module will be called container. 336 337config ACPI_HOTPLUG_MEMORY 338 tristate "Memory Hotplug" 339 depends on MEMORY_HOTPLUG 340 default n 341 help 342 This driver supports ACPI memory hotplug. The driver 343 fields notifications on ACPI memory devices (PNP0C80), 344 which represent memory ranges that may be onlined or 345 offlined during runtime. 346 347 If your hardware and firmware do not support adding or 348 removing memory devices at runtime, you need not enable 349 this driver. 350 351 To compile this driver as a module, choose M here: 352 the module will be called acpi_memhotplug. 353 354config ACPI_SBS 355 tristate "Smart Battery System" 356 depends on X86 357 select POWER_SUPPLY 358 help 359 This driver supports the Smart Battery System, another 360 type of access to battery information, found on some laptops. 361 362 To compile this driver as a module, choose M here: 363 the modules will be called sbs and sbshc. 364 365config ACPI_HED 366 tristate "Hardware Error Device" 367 help 368 This driver supports the Hardware Error Device (PNP0C33), 369 which is used to report some hardware errors notified via 370 SCI, mainly the corrected errors. 371 372config ACPI_CUSTOM_METHOD 373 tristate "Allow ACPI methods to be inserted/replaced at run time" 374 depends on DEBUG_FS 375 default n 376 help 377 This debug facility allows ACPI AML methods to be inserted and/or 378 replaced without rebooting the system. For details refer to: 379 Documentation/acpi/method-customizing.txt. 380 381 NOTE: This option is security sensitive, because it allows arbitrary 382 kernel memory to be written to by root (uid=0) users, allowing them 383 to bypass certain security measures (e.g. if root is not allowed to 384 load additional kernel modules after boot, this feature may be used 385 to override that restriction). 386 387source "drivers/acpi/apei/Kconfig" 388 389endif # ACPI 390