drivers/acpi/Kconfig

   1 #
   2 # ACPI Configuration
   3 #
   4
   5 menuconfig 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
  39 if ACPI
  40
  41 config ACPI_SLEEP
  42         bool
  43         depends on SUSPEND || HIBERNATION
  44         default y
  45
  46 config 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  52           they have been replaced by functions in /sys.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
  59 config 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
  76 config 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
  94 config 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
 112 config 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
 125 config 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
 138 config 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
 151 config 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
 166 config 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
 177 config 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
 184 config ACPI_I2C
 185         def_tristate I2C
 186         depends on I2C
 187         help
 188           ACPI I2C enumeration support.
 189
 190 config 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.
 203 config 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
 215 config ACPI_HOTPLUG_CPU
 216         bool
 217         depends on EXPERIMENTAL && ACPI_PROCESSOR && HOTPLUG_CPU
 218         select ACPI_CONTAINER
 219         default y
 220
 221 config 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
 233 config 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
 247 config 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
 253 config 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
 266 config ACPI_CUSTOM_DSDT
 267         bool
 268         default ACPI_CUSTOM_DSDT_FILE != ""
 269
 270 config 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
 279 config 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
 290 config 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
 302 config 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
 310 config 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
 323 config 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
 339 config 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
 352 config 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
 369 config 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
 380 config 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
 387 config 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
 402 config 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
 411 source "drivers/acpi/apei/Kconfig"
 412
 413 endif   # ACPI