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50 For backwards compatibility, this option allows 51 deprecated /proc/acpi/ files to exist, even when 52 they have been replaced by functions in /sys. 53 54 This option has no effect on /proc/acpi/ files 55 and functions which do not yet exist in /sys. 56 57 Say N to delete /proc/acpi/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compatibility, this option allows 64 deprecated power /proc/acpi/ directories to exist, even when 65 they have been replaced by functions in /sys. 66 The deprecated directories (and their replacements) include: 67 /proc/acpi/battery/* (/sys/class/power_supply/*) 68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