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50 For backwards compatibility, this option allows 51 deprecated /proc/acpi/ files to exist, even when 52 they have been replaced by functions in /sys. 53 54 This option has no effect on /proc/acpi/ files 55 and functions which do not yet exist in /sys. 56 57 Say N to delete /proc/acpi/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compatibility, this option allows 64 deprecated power /proc/acpi/ directories to exist, even when 65 they have been replaced by functions in /sys. 66 The deprecated directories (and their replacements) include: 67 /proc/acpi/battery/* (/sys/class/power_supply/*) 68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 help 180 This driver supports ACPI-controlled docking stations and removable 181 drive bays such as the IBM Ultrabay and the Dell Module Bay. 182 183config ACPI_I2C 184 def_tristate I2C 185 depends on I2C 186 help 187 ACPI I2C enumeration support. 188 189config ACPI_PROCESSOR 190 tristate "Processor" 191 select THERMAL 192 select CPU_IDLE 193 default y 194 help 195 This driver installs ACPI as the idle handler for Linux and uses 196 ACPI C2 and C3 processor states to save power on systems that 197 support it. It is required by several flavors of cpufreq 198 performance-state drivers. 199 200 To compile this driver as a module, choose M here: 201 the module will be called processor. 202config ACPI_IPMI 203 tristate "IPMI" 204 depends on IPMI_SI && IPMI_HANDLER 205 default n 206 help 207 This driver enables the ACPI to access the BMC controller. And it 208 uses the IPMI request/response message to communicate with BMC 209 controller, which can be found on on the server. 210 211 To compile this driver as a module, choose M here: 212 the module will be called as acpi_ipmi. 213 214config ACPI_HOTPLUG_CPU 215 bool 216 depends on ACPI_PROCESSOR && HOTPLUG_CPU 217 select ACPI_CONTAINER 218 default y 219 220config ACPI_PROCESSOR_AGGREGATOR 221 tristate "Processor Aggregator" 222 depends on ACPI_PROCESSOR 223 depends on X86 224 help 225 ACPI 4.0 defines processor Aggregator, which enables OS to perform 226 specific processor configuration and control that applies to all 227 processors in the platform. Currently only logical processor idling 228 is defined, which is to reduce power consumption. This driver 229 supports the new device. 230 231config ACPI_THERMAL 232 tristate "Thermal Zone" 233 depends on ACPI_PROCESSOR 234 select THERMAL 235 default y 236 help 237 This driver supports ACPI thermal zones. Most mobile and 238 some desktop systems support ACPI thermal zones. It is HIGHLY 239 recommended that this option be enabled, as your processor(s) 240 may be damaged without it. 241 242 To compile this driver as a module, choose M here: 243 the module will be called thermal. 244 245config ACPI_NUMA 246 bool "NUMA support" 247 depends on NUMA 248 depends on (X86 || IA64) 249 default y if IA64_GENERIC || IA64_SGI_SN2 250 251config ACPI_CUSTOM_DSDT_FILE 252 string "Custom DSDT Table file to include" 253 default "" 254 depends on !STANDALONE 255 help 256 This option supports a custom DSDT by linking it into the kernel. 257 See Documentation/acpi/dsdt-override.txt 258 259 Enter the full path name to the file which includes the AmlCode 260 declaration. 261 262 If unsure, don't enter a file name. 263 264config ACPI_CUSTOM_DSDT 265 bool 266 default ACPI_CUSTOM_DSDT_FILE != "" 267 268config ACPI_INITRD_TABLE_OVERRIDE 269 bool "ACPI tables override via initrd" 270 depends on BLK_DEV_INITRD && X86 271 default n 272 help 273 This option provides functionality to override arbitrary ACPI tables 274 via initrd. No functional change if no ACPI tables are passed via 275 initrd, therefore it's safe to say Y. 276 See Documentation/acpi/initrd_table_override.txt for details 277 278config ACPI_BLACKLIST_YEAR 279 int "Disable ACPI for systems before Jan 1st this year" if X86_32 280 default 0 281 help 282 Enter a 4-digit year, e.g., 2001, to disable ACPI by default 283 on platforms with DMI BIOS date before January 1st that year. 284 "acpi=force" can be used to override this mechanism. 285 286 Enter 0 to disable this mechanism and allow ACPI to 287 run by default no matter what the year. (default) 288 289config ACPI_DEBUG 290 bool "Debug Statements" 291 default n 292 help 293 The ACPI subsystem can produce debug output. Saying Y enables this 294 output and increases the kernel size by around 50K. 295 296 Use the acpi.debug_layer and acpi.debug_level kernel command-line 297 parameters documented in Documentation/acpi/debug.txt and 298 Documentation/kernel-parameters.txt to control the type and 299 amount of debug output. 300 301config ACPI_PCI_SLOT 302 bool "PCI slot detection driver" 303 depends on SYSFS 304 default n 305 help 306 This driver creates entries in /sys/bus/pci/slots/ for all PCI 307 slots in the system. This can help correlate PCI bus addresses, 308 i.e., segment/bus/device/function tuples, with physical slots in 309 the system. If you are unsure, say N. 310 311config X86_PM_TIMER 312 bool "Power Management Timer Support" if EXPERT 313 depends on X86 314 default y 315 help 316 The Power Management Timer is available on all ACPI-capable, 317 in most cases even if ACPI is unusable or blacklisted. 318 319 This timing source is not affected by power management features 320 like aggressive processor idling, throttling, frequency and/or 321 voltage scaling, unlike the commonly used Time Stamp Counter 322 (TSC) timing source. 323 324 You should nearly always say Y here because many modern 325 systems require this timer. 326 327config ACPI_CONTAINER 328 bool "Container and Module Devices" 329 default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU) 330 help 331 This driver supports ACPI Container and Module devices (IDs 332 ACPI0004, PNP0A05, and PNP0A06). 333 334 This helps support hotplug of nodes, CPUs, and memory. 335 336 To compile this driver as a module, choose M here: 337 the module will be called container. 338 339config ACPI_HOTPLUG_MEMORY 340 bool "Memory Hotplug" 341 depends on MEMORY_HOTPLUG 342 help 343 This driver supports ACPI memory hotplug. The driver 344 fields notifications on ACPI memory devices (PNP0C80), 345 which represent memory ranges that may be onlined or 346 offlined during runtime. 347 348 If your hardware and firmware do not support adding or 349 removing memory devices at runtime, you need not enable 350 this driver. 351 352 To compile this driver as a module, choose M here: 353 the module will be called acpi_memhotplug. 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 397source "drivers/acpi/apei/Kconfig" 398 399endif # ACPI 400