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  54           they have been replaced by functions in /sys.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  76           they have been replaced by functions in /sys.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