a0d84a92df
Reformat acpi.debug_layer and acpi.debug_level documentation so it's more readable, add some clues about how to figure out the mask bits that enable a specific ACPI_DEBUG_PRINT statement, and include some useful examples. Move the list of masks to Documentation/acpi/debug.txt (these are copies of the authoritative values in acoutput.h and acpi_drivers.h). Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Len Brown <len.brown@intel.com>
403 lines
14 KiB
Text
403 lines
14 KiB
Text
#
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# ACPI Configuration
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#
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menuconfig ACPI
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bool "ACPI (Advanced Configuration and Power Interface) Support"
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depends on !IA64_HP_SIM
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depends on IA64 || X86
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depends on PCI
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depends on PM
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select PNP
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default y
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---help---
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Advanced Configuration and Power Interface (ACPI) support for
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Linux requires an ACPI compliant platform (hardware/firmware),
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and assumes the presence of OS-directed configuration and power
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management (OSPM) software. This option will enlarge your
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kernel by about 70K.
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Linux ACPI provides a robust functional replacement for several
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legacy configuration and power management interfaces, including
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the Plug-and-Play BIOS specification (PnP BIOS), the
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MultiProcessor Specification (MPS), and the Advanced Power
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Management (APM) specification. If both ACPI and APM support
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are configured, whichever is loaded first shall be used.
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The ACPI SourceForge project contains the latest source code,
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documentation, tools, mailing list subscription, and other
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information. This project is available at:
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<http://sourceforge.net/projects/acpi>
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Linux support for ACPI is based on Intel Corporation's ACPI
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Component Architecture (ACPI CA). For more information see:
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<http://developer.intel.com/technology/iapc/acpi>
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ACPI is an open industry specification co-developed by Compaq,
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Intel, Microsoft, Phoenix, and Toshiba. The specification is
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available at:
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<http://www.acpi.info>
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if ACPI
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config ACPI_SLEEP
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bool
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depends on SUSPEND || HIBERNATION
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default y
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config ACPI_PROCFS
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bool "Deprecated /proc/acpi files"
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depends on PROC_FS
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---help---
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For backwards compatibility, this option allows
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deprecated /proc/acpi/ files to exist, even when
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they have been replaced by functions in /sys.
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The deprecated files (and their replacements) include:
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/proc/acpi/sleep (/sys/power/state)
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/proc/acpi/info (/sys/modules/acpi/parameters/acpica_version)
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/proc/acpi/dsdt (/sys/firmware/acpi/tables/DSDT)
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/proc/acpi/fadt (/sys/firmware/acpi/tables/FACP)
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/proc/acpi/debug_layer (/sys/module/acpi/parameters/debug_layer)
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/proc/acpi/debug_level (/sys/module/acpi/parameters/debug_level)
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This option has no effect on /proc/acpi/ files
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and functions which do not yet exist in /sys.
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Say N to delete /proc/acpi/ files that have moved to /sys/
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config ACPI_PROCFS_POWER
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bool "Deprecated power /proc/acpi directories"
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depends on PROC_FS
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default y
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---help---
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For backwards compatibility, this option allows
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deprecated power /proc/acpi/ directories to exist, even when
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they have been replaced by functions in /sys.
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The deprecated directories (and their replacements) include:
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/proc/acpi/battery/* (/sys/class/power_supply/*)
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/proc/acpi/ac_adapter/* (sys/class/power_supply/*)
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This option has no effect on /proc/acpi/ directories
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and functions, which do not yet exist in /sys
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Say N to delete power /proc/acpi/ directories that have moved to /sys/
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config ACPI_SYSFS_POWER
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bool "Future power /sys interface"
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select POWER_SUPPLY
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default y
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---help---
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Say N to disable power /sys interface
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config ACPI_PROC_EVENT
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bool "Deprecated /proc/acpi/event support"
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depends on PROC_FS
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default y
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---help---
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A user-space daemon, acpi, typically read /proc/acpi/event
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and handled all ACPI sub-system generated events.
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These events are now delivered to user-space via
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either the input layer, or as netlink events.
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This build option enables the old code for legacy
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user-space implementation. After some time, this will
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be moved under CONFIG_ACPI_PROCFS, and then deleted.
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Say Y here to retain the old behaviour. Say N if your
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user-space is newer than kernel 2.6.23 (September 2007).
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config ACPI_AC
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tristate "AC Adapter"
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depends on X86
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default y
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help
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This driver adds support for the AC Adapter object, which indicates
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whether a system is on AC, or not. If you have a system that can
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switch between A/C and battery, say Y.
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config ACPI_BATTERY
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tristate "Battery"
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depends on X86
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default y
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help
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This driver adds support for battery information through
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/proc/acpi/battery. If you have a mobile system with a battery,
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say Y.
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config ACPI_BUTTON
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tristate "Button"
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depends on INPUT
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default y
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help
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This driver handles events on the power, sleep and lid buttons.
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A daemon reads /proc/acpi/event and perform user-defined actions
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such as shutting down the system. This is necessary for
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software controlled poweroff.
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config ACPI_VIDEO
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tristate "Video"
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depends on X86 && BACKLIGHT_CLASS_DEVICE && VIDEO_OUTPUT_CONTROL
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depends on INPUT
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select THERMAL
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help
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This driver implement the ACPI Extensions For Display Adapters
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for integrated graphics devices on motherboard, as specified in
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ACPI 2.0 Specification, Appendix B, allowing to perform some basic
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control like defining the video POST device, retrieving EDID information
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or to setup a video output, etc.
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Note that this is an ref. implementation only. It may or may not work
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for your integrated video device.
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config ACPI_FAN
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tristate "Fan"
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select THERMAL
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default y
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help
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This driver adds support for ACPI fan devices, allowing user-mode
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applications to perform basic fan control (on, off, status).
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config ACPI_DOCK
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bool "Dock"
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depends on EXPERIMENTAL
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help
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This driver adds support for ACPI controlled docking stations and removable
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drive bays such as the IBM ultrabay or the Dell Module Bay.
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config ACPI_PROCESSOR
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tristate "Processor"
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select THERMAL
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default y
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help
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This driver installs ACPI as the idle handler for Linux, and uses
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ACPI C2 and C3 processor states to save power, on systems that
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support it. It is required by several flavors of cpufreq
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Performance-state drivers.
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config ACPI_HOTPLUG_CPU
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bool
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depends on ACPI_PROCESSOR && HOTPLUG_CPU
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select ACPI_CONTAINER
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default y
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config ACPI_THERMAL
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tristate "Thermal Zone"
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depends on ACPI_PROCESSOR
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select THERMAL
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default y
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help
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This driver adds support for ACPI thermal zones. Most mobile and
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some desktop systems support ACPI thermal zones. It is HIGHLY
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recommended that this option be enabled, as your processor(s)
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may be damaged without it.
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config ACPI_NUMA
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bool "NUMA support"
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depends on NUMA
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depends on (X86 || IA64)
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default y if IA64_GENERIC || IA64_SGI_SN2
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config ACPI_WMI
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tristate "WMI (EXPERIMENTAL)"
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depends on X86
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depends on EXPERIMENTAL
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help
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This driver adds support for the ACPI-WMI (Windows Management
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Instrumentation) mapper device (PNP0C14) found on some systems.
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ACPI-WMI is a proprietary extension to ACPI to expose parts of the
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ACPI firmware to userspace - this is done through various vendor
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defined methods and data blocks in a PNP0C14 device, which are then
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made available for userspace to call.
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The implementation of this in Linux currently only exposes this to
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other kernel space drivers.
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This driver is a required dependency to build the firmware specific
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drivers needed on many machines, including Acer and HP laptops.
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It is safe to enable this driver even if your DSDT doesn't define
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any ACPI-WMI devices.
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config ACPI_ASUS
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tristate "ASUS/Medion Laptop Extras"
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depends on X86
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select BACKLIGHT_CLASS_DEVICE
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---help---
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This driver provides support for extra features of ACPI-compatible
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ASUS laptops. As some of Medion laptops are made by ASUS, it may also
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support some Medion laptops (such as 9675 for example). It makes all
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the extra buttons generate standard ACPI events that go through
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/proc/acpi/events, and (on some models) adds support for changing the
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display brightness and output, switching the LCD backlight on and off,
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and most importantly, allows you to blink those fancy LEDs intended
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for reporting mail and wireless status.
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Note: display switching code is currently considered EXPERIMENTAL,
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toying with these values may even lock your machine.
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All settings are changed via /proc/acpi/asus directory entries. Owner
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and group for these entries can be set with asus_uid and asus_gid
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parameters.
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More information and a userspace daemon for handling the extra buttons
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at <http://sourceforge.net/projects/acpi4asus/>.
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If you have an ACPI-compatible ASUS laptop, say Y or M here. This
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driver is still under development, so if your laptop is unsupported or
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something works not quite as expected, please use the mailing list
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available on the above page (acpi4asus-user@lists.sourceforge.net).
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NOTE: This driver is deprecated and will probably be removed soon,
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use asus-laptop instead.
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config ACPI_TOSHIBA
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tristate "Toshiba Laptop Extras"
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depends on X86 && INPUT
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select INPUT_POLLDEV
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select NET
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select RFKILL
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select BACKLIGHT_CLASS_DEVICE
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---help---
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This driver adds support for access to certain system settings
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on "legacy free" Toshiba laptops. These laptops can be recognized by
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their lack of a BIOS setup menu and APM support.
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On these machines, all system configuration is handled through the
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ACPI. This driver is required for access to controls not covered
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by the general ACPI drivers, such as LCD brightness, video output,
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etc.
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This driver differs from the non-ACPI Toshiba laptop driver (located
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under "Processor type and features") in several aspects.
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Configuration is accessed by reading and writing text files in the
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/proc tree instead of by program interface to /dev. Furthermore, no
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power management functions are exposed, as those are handled by the
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general ACPI drivers.
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More information about this driver is available at
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<http://memebeam.org/toys/ToshibaAcpiDriver>.
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If you have a legacy free Toshiba laptop (such as the Libretto L1
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series), say Y.
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config ACPI_CUSTOM_DSDT_FILE
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string "Custom DSDT Table file to include"
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default ""
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depends on !STANDALONE
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help
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This option supports a custom DSDT by linking it into the kernel.
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See Documentation/acpi/dsdt-override.txt
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Enter the full path name to the file which includes the AmlCode
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declaration.
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If unsure, don't enter a file name.
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config ACPI_CUSTOM_DSDT
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bool
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default ACPI_CUSTOM_DSDT_FILE != ""
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config ACPI_BLACKLIST_YEAR
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int "Disable ACPI for systems before Jan 1st this year" if X86_32
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default 0
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help
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enter a 4-digit year, eg. 2001 to disable ACPI by default
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on platforms with DMI BIOS date before January 1st that year.
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"acpi=force" can be used to override this mechanism.
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Enter 0 to disable this mechanism and allow ACPI to
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run by default no matter what the year. (default)
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config ACPI_DEBUG
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bool "Debug Statements"
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default n
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help
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The ACPI subsystem can produce debug output. Saying Y enables this
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output and increases the kernel size by around 50K.
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Use the acpi.debug_layer and acpi.debug_level kernel command-line
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parameters documented in Documentation/acpi/debug.txt and
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Documentation/kernel-parameters.txt to control the type and
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amount of debug output.
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config ACPI_DEBUG_FUNC_TRACE
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bool "Additionally enable ACPI function tracing"
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default n
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depends on ACPI_DEBUG
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help
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ACPI Debug Statements slow down ACPI processing. Function trace
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is about half of the penalty and is rarely useful.
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config ACPI_PCI_SLOT
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tristate "PCI slot detection driver"
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default n
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help
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This driver will attempt to discover all PCI slots in your system,
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and creates entries in /sys/bus/pci/slots/. This feature can
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help you correlate PCI bus addresses with the physical geography
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of your slots. If you are unsure, say N.
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config ACPI_SYSTEM
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bool
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default y
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help
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This driver will enable your system to shut down using ACPI, and
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dump your ACPI DSDT table using /proc/acpi/dsdt.
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config X86_PM_TIMER
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bool "Power Management Timer Support" if EMBEDDED
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depends on X86
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default y
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help
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The Power Management Timer is available on all ACPI-capable,
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in most cases even if ACPI is unusable or blacklisted.
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This timing source is not affected by power management features
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like aggressive processor idling, throttling, frequency and/or
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voltage scaling, unlike the commonly used Time Stamp Counter
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(TSC) timing source.
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You should nearly always say Y here because many modern
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systems require this timer.
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config ACPI_CONTAINER
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tristate "ACPI0004,PNP0A05 and PNP0A06 Container Driver (EXPERIMENTAL)"
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depends on EXPERIMENTAL
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default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU || ACPI_HOTPLUG_IO)
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---help---
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This allows _physical_ insertion and removal of CPUs and memory.
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This can be useful, for example, on NUMA machines that support
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ACPI based physical hotplug of nodes, or non-NUMA machines that
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support physical cpu/memory hot-plug.
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If one selects "m", this driver can be loaded with
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"modprobe acpi_container".
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config ACPI_HOTPLUG_MEMORY
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tristate "Memory Hotplug"
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depends on MEMORY_HOTPLUG
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default n
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help
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This driver adds supports for ACPI Memory Hotplug. This driver
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provides support for fielding notifications on ACPI memory
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devices (PNP0C80) which represent memory ranges that may be
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onlined or offlined during runtime.
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Enabling this driver assumes that your platform hardware
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and firmware have support for hot-plugging physical memory. If
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your system does not support physically adding or ripping out
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memory DIMMs at some platform defined granularity (individually
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or as a bank) at runtime, then you need not enable this driver.
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If one selects "m," this driver can be loaded using the following
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command:
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$>modprobe acpi_memhotplug
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config ACPI_SBS
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tristate "Smart Battery System"
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depends on X86
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help
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This driver adds support for the Smart Battery System, another
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type of access to battery information, found on some laptops.
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endif # ACPI
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