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         depends on PM
  11         select PNP
  12         select CPU_IDLE
  13         default y
  14         help
  15           Advanced Configuration and Power Interface (ACPI) support for
  16           Linux requires an ACPI-compliant platform (hardware/firmware),
  17           and assumes the presence of OS-directed configuration and power
  18           management (OSPM) software.  This option will enlarge your
  19           kernel by about 70K.
  20
  21           Linux ACPI provides a robust functional replacement for several
  22           legacy configuration and power management interfaces, including
  23           the Plug-and-Play BIOS specification (PnP BIOS), the
  24           MultiProcessor Specification (MPS), and the Advanced Power
  25           Management (APM) specification.  If both ACPI and APM support
  26           are configured, ACPI is used.
  27
  28           The project home page for the Linux ACPI subsystem is here:
  29           <http://www.lesswatts.org/projects/acpi/>
  30
  31           Linux support for ACPI is based on Intel Corporation's ACPI
  32           Component Architecture (ACPI CA).  For more information on the
  33           ACPI CA, see:
  34           <http://acpica.org/>
  35
  36           ACPI is an open industry specification co-developed by
  37           Hewlett-Packard, Intel, Microsoft, Phoenix, and Toshiba.
  38           The specification is available at:
  39           <http://www.acpi.info>
  40
  41 if ACPI
  42
  43 config ACPI_SLEEP
  44         bool
  45         depends on SUSPEND || HIBERNATION
  46         default y
  47
  48 config ACPI_PROCFS
  49         bool "Deprecated /proc/acpi files"
  50         depends on PROC_FS
  51         help
  52           For backwards compatibility, this option allows
  53           deprecated /proc/acpi/ files to exist, even when
  54           they have been replaced by functions in /sys.
  55           The deprecated files (and their replacements) include:
  56
  57           /proc/acpi/sleep (/sys/power/state)
  58           /proc/acpi/info (/sys/module/acpi/parameters/acpica_version)
  59           /proc/acpi/dsdt (/sys/firmware/acpi/tables/DSDT)
  60           /proc/acpi/fadt (/sys/firmware/acpi/tables/FACP)
  61           /proc/acpi/debug_layer (/sys/module/acpi/parameters/debug_layer)
  62           /proc/acpi/debug_level (/sys/module/acpi/parameters/debug_level)
  63           /proc/acpi/processor/*/power (/sys/devices/system/cpu/*/cpuidle/*)
  64           /proc/acpi/processor/*/performance (/sys/devices/system/cpu/*/
  65                 cpufreq/*)
  66           /proc/acpi/processor/*/throttling (/sys/class/thermal/
  67                 cooling_device*/*)
  68           This option has no effect on /proc/acpi/ files
  69           and functions which do not yet exist in /sys.
  70
  71           Say N to delete /proc/acpi/ files that have moved to /sys/
  72
  73 config ACPI_PROCFS_POWER
  74         bool "Deprecated power /proc/acpi directories"
  75         depends on PROC_FS
  76         default y
  77         help
  78           For backwards compatibility, this option allows
  79           deprecated power /proc/acpi/ directories to exist, even when
  80           they have been replaced by functions in /sys.
  81           The deprecated directories (and their replacements) include:
  82           /proc/acpi/battery/* (/sys/class/power_supply/*)
  83           /proc/acpi/ac_adapter/* (sys/class/power_supply/*)
  84           This option has no effect on /proc/acpi/ directories
  85           and functions, which do not yet exist in /sys
  86
  87           Say N to delete power /proc/acpi/ directories that have moved to /sys/
  88
  89 config ACPI_POWER_METER
  90         tristate "ACPI 4.0 power meter"
  91         depends on HWMON
  92         help
  93           This driver exposes ACPI 4.0 power meters as hardware monitoring
  94           devices.  Say Y (or M) if you have a computer with ACPI 4.0 firmware
  95           and a power meter.
  96
  97           To compile this driver as a module, choose M here:
  98           the module will be called power-meter.
  99
 100 config ACPI_SYSFS_POWER
 101         bool "Future power /sys interface"
 102         select POWER_SUPPLY
 103         default y
 104         help
 105           Say N to disable power /sys interface
 106
 107 config ACPI_PROC_EVENT
 108         bool "Deprecated /proc/acpi/event support"
 109         depends on PROC_FS
 110         default y
 111         help
 112           A user-space daemon, acpid, typically reads /proc/acpi/event
 113           and handles all ACPI-generated events.
 114
 115           These events are now delivered to user-space either
 116           via the input layer or as netlink events.
 117
 118           This build option enables the old code for legacy
 119           user-space implementation.  After some time, this will
 120           be moved under CONFIG_ACPI_PROCFS, and then deleted.
 121
 122           Say Y here to retain the old behaviour.  Say N if your
 123           user-space is newer than kernel 2.6.23 (September 2007).
 124
 125 config ACPI_AC
 126         tristate "AC Adapter"
 127         depends on X86
 128         default y
 129         help
 130           This driver supports the AC Adapter object, which indicates
 131           whether a system is on AC or not.  If you have a system that can
 132           switch between A/C and battery, say Y.
 133
 134           To compile this driver as a module, choose M here:
 135           the module will be called ac.
 136
 137 config ACPI_BATTERY
 138         tristate "Battery"
 139         depends on X86
 140         default y
 141         help
 142           This driver adds support for battery information through
 143           /proc/acpi/battery. If you have a mobile system with a battery,
 144           say Y.
 145
 146           To compile this driver as a module, choose M here:
 147           the module will be called battery.
 148
 149 config ACPI_BUTTON
 150         tristate "Button"
 151         depends on INPUT
 152         default y
 153         help
 154           This driver handles events on the power, sleep, and lid buttons.
 155           A daemon reads /proc/acpi/event and perform user-defined actions
 156           such as shutting down the system.  This is necessary for
 157           software-controlled poweroff.
 158
 159           To compile this driver as a module, choose M here:
 160           the module will be called button.
 161
 162 config ACPI_VIDEO
 163         tristate "Video"
 164         depends on X86 && BACKLIGHT_CLASS_DEVICE && VIDEO_OUTPUT_CONTROL
 165         depends on INPUT
 166         select THERMAL
 167         help
 168           This driver implements the ACPI Extensions For Display Adapters
 169           for integrated graphics devices on motherboard, as specified in
 170           ACPI 2.0 Specification, Appendix B.  This supports basic operations
 171           such as defining the video POST device, retrieving EDID information,
 172           and setting up a video output.
 173
 174           To compile this driver as a module, choose M here:
 175           the module will be called video.
 176
 177 config ACPI_FAN
 178         tristate "Fan"
 179         select THERMAL
 180         default y
 181         help
 182           This driver supports ACPI fan devices, allowing user-mode
 183           applications to perform basic fan control (on, off, status).
 184
 185           To compile this driver as a module, choose M here:
 186           the module will be called fan.
 187
 188 config ACPI_DOCK
 189         bool "Dock"
 190         depends on EXPERIMENTAL
 191         help
 192           This driver supports ACPI-controlled docking stations and removable
 193           drive bays such as the IBM Ultrabay and the Dell Module Bay.
 194
 195 config ACPI_PROCESSOR
 196         tristate "Processor"
 197         select THERMAL
 198         default y
 199         help
 200           This driver installs ACPI as the idle handler for Linux and uses
 201           ACPI C2 and C3 processor states to save power on systems that
 202           support it.  It is required by several flavors of cpufreq
 203           performance-state drivers.
 204
 205           To compile this driver as a module, choose M here:
 206           the module will be called processor.
 207
 208 config ACPI_HOTPLUG_CPU
 209         bool
 210         depends on ACPI_PROCESSOR && HOTPLUG_CPU
 211         select ACPI_CONTAINER
 212         default y
 213
 214 config ACPI_THERMAL
 215         tristate "Thermal Zone"
 216         depends on ACPI_PROCESSOR
 217         select THERMAL
 218         default y
 219         help
 220           This driver supports ACPI thermal zones.  Most mobile and
 221           some desktop systems support ACPI thermal zones.  It is HIGHLY
 222           recommended that this option be enabled, as your processor(s)
 223           may be damaged without it.
 224
 225           To compile this driver as a module, choose M here:
 226           the module will be called thermal.
 227
 228 config ACPI_NUMA
 229         bool "NUMA support"
 230         depends on NUMA
 231         depends on (X86 || IA64)
 232         default y if IA64_GENERIC || IA64_SGI_SN2
 233
 234 config ACPI_CUSTOM_DSDT_FILE
 235         string "Custom DSDT Table file to include"
 236         default ""
 237         depends on !STANDALONE
 238         help
 239           This option supports a custom DSDT by linking it into the kernel.
 240           See Documentation/acpi/dsdt-override.txt
 241
 242           Enter the full path name to the file which includes the AmlCode
 243           declaration.
 244
 245           If unsure, don't enter a file name.
 246
 247 config ACPI_CUSTOM_DSDT
 248         bool
 249         default ACPI_CUSTOM_DSDT_FILE != ""
 250
 251 config ACPI_BLACKLIST_YEAR
 252         int "Disable ACPI for systems before Jan 1st this year" if X86_32
 253         default 0
 254         help
 255           Enter a 4-digit year, e.g., 2001, to disable ACPI by default
 256           on platforms with DMI BIOS date before January 1st that year.
 257           "acpi=force" can be used to override this mechanism.
 258
 259           Enter 0 to disable this mechanism and allow ACPI to
 260           run by default no matter what the year.  (default)
 261
 262 config ACPI_DEBUG
 263         bool "Debug Statements"
 264         default n
 265         help
 266           The ACPI subsystem can produce debug output.  Saying Y enables this
 267           output and increases the kernel size by around 50K.
 268
 269           Use the acpi.debug_layer and acpi.debug_level kernel command-line
 270           parameters documented in Documentation/acpi/debug.txt and
 271           Documentation/kernel-parameters.txt to control the type and
 272           amount of debug output.
 273
 274 config ACPI_DEBUG_FUNC_TRACE
 275         bool "Additionally enable ACPI function tracing"
 276         default n
 277         depends on ACPI_DEBUG
 278         help
 279           ACPI Debug Statements slow down ACPI processing. Function trace
 280           is about half of the penalty and is rarely useful.
 281
 282 config ACPI_PCI_SLOT
 283         tristate "PCI slot detection driver"
 284         depends on SYSFS
 285         default n
 286         help
 287           This driver creates entries in /sys/bus/pci/slots/ for all PCI
 288           slots in the system.  This can help correlate PCI bus addresses,
 289           i.e., segment/bus/device/function tuples, with physical slots in
 290           the system.  If you are unsure, say N.
 291
 292           To compile this driver as a module, choose M here:
 293           the module will be called pci_slot.
 294
 295 config X86_PM_TIMER
 296         bool "Power Management Timer Support" if EMBEDDED
 297         depends on X86
 298         default y
 299         help
 300           The Power Management Timer is available on all ACPI-capable,
 301           in most cases even if ACPI is unusable or blacklisted.
 302
 303           This timing source is not affected by power management features
 304           like aggressive processor idling, throttling, frequency and/or
 305           voltage scaling, unlike the commonly used Time Stamp Counter
 306           (TSC) timing source.
 307
 308           You should nearly always say Y here because many modern
 309           systems require this timer.
 310
 311 config ACPI_CONTAINER
 312         tristate "Container and Module Devices (EXPERIMENTAL)"
 313         depends on EXPERIMENTAL
 314         default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU || ACPI_HOTPLUG_IO)
 315         help
 316           This driver supports ACPI Container and Module devices (IDs
 317           ACPI0004, PNP0A05, and PNP0A06).
 318
 319           This helps support hotplug of nodes, CPUs, and memory.
 320
 321           To compile this driver as a module, choose M here:
 322           the module will be called container.
 323
 324 config ACPI_HOTPLUG_MEMORY
 325         tristate "Memory Hotplug"
 326         depends on MEMORY_HOTPLUG
 327         default n
 328         help
 329           This driver supports ACPI memory hotplug.  The driver
 330           fields notifications on ACPI memory devices (PNP0C80),
 331           which represent memory ranges that may be onlined or
 332           offlined during runtime.
 333
 334           If your hardware and firmware do not support adding or
 335           removing memory devices at runtime, you need not enable
 336           this driver.
 337
 338           To compile this driver as a module, choose M here:
 339           the module will be called acpi_memhotplug.
 340
 341 config ACPI_SBS
 342         tristate "Smart Battery System"
 343         depends on X86
 344         help
 345           This driver supports the Smart Battery System, another
 346           type of access to battery information, found on some laptops.
 347
 348           To compile this driver as a module, choose M here:
 349           the modules will be called sbs and sbshc.
 350
 351 endif   # ACPI