500de3dd46
- Set Kconfig option default n - Only allow root to read/write io file (sever bug!) - Introduce write support module param -> default off - Properly clean up if any debugfs files cannot be created Signed-off-by: Thomas Renninger <trenn@suse.de> CC: mjg59@srcf.ucam.org CC: platform-driver-x86@vger.kernel.org CC: linux-acpi@vger.kernel.org CC: astarikovskiy@suse.de Signed-off-by: Matthew Garrett <mjg@redhat.com>
390 lines
12 KiB
Text
390 lines
12 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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select CPU_IDLE
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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, ACPI is used.
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The project home page for the Linux ACPI subsystem is here:
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<http://www.lesswatts.org/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 on the
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ACPI CA, see:
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<http://acpica.org/>
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ACPI is an open industry specification co-developed by
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Hewlett-Packard, Intel, Microsoft, Phoenix, and Toshiba.
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The specification is 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/module/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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/proc/acpi/processor/*/power (/sys/devices/system/cpu/*/cpuidle/*)
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/proc/acpi/processor/*/performance (/sys/devices/system/cpu/*/
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cpufreq/*)
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/proc/acpi/processor/*/throttling (/sys/class/thermal/
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cooling_device*/*)
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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_POWER_METER
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tristate "ACPI 4.0 power meter"
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depends on HWMON
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help
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This driver exposes ACPI 4.0 power meters as hardware monitoring
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devices. Say Y (or M) if you have a computer with ACPI 4.0 firmware
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and a power meter.
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To compile this driver as a module, choose M here:
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the module will be called power-meter.
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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_EC_DEBUGFS
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tristate "EC read/write access through /sys/kernel/debug/ec"
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default n
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help
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Say N to disable Embedded Controller /sys/kernel/debug interface
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Be aware that using this interface can confuse your Embedded
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Controller in a way that a normal reboot is not enough. You then
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have to power of your system, and remove the laptop battery for
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some seconds.
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An Embedded Controller typically is available on laptops and reads
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sensor values like battery state and temperature.
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The kernel accesses the EC through ACPI parsed code provided by BIOS
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tables. This option allows to access the EC directly without ACPI
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code being involved.
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Thus this option is a debug option that helps to write ACPI drivers
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and can be used to identify ACPI code or EC firmware bugs.
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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, acpid, typically reads /proc/acpi/event
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and handles all ACPI-generated events.
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These events are now delivered to user-space either
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via 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 supports 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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To compile this driver as a module, choose M here:
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the module will be called ac.
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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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To compile this driver as a module, choose M here:
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the module will be called battery.
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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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To compile this driver as a module, choose M here:
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the module will be called button.
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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 implements 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. This supports basic operations
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such as defining the video POST device, retrieving EDID information,
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and setting up a video output.
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To compile this driver as a module, choose M here:
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the module will be called video.
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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 supports ACPI fan devices, allowing user-mode
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applications to perform basic fan control (on, off, status).
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To compile this driver as a module, choose M here:
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the module will be called fan.
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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 supports ACPI-controlled docking stations and removable
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drive bays such as the IBM Ultrabay and 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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To compile this driver as a module, choose M here:
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the module will be called processor.
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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_PROCESSOR_AGGREGATOR
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tristate "Processor Aggregator"
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depends on ACPI_PROCESSOR
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depends on EXPERIMENTAL
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depends on X86
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help
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ACPI 4.0 defines processor Aggregator, which enables OS to perform
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specific processor configuration and control that applies to all
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processors in the platform. Currently only logical processor idling
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is defined, which is to reduce power consumption. This driver
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supports the new device.
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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 supports 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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To compile this driver as a module, choose M here:
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the module will be called thermal.
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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_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, e.g., 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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depends on SYSFS
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default n
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help
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This driver creates entries in /sys/bus/pci/slots/ for all PCI
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slots in the system. This can help correlate PCI bus addresses,
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i.e., segment/bus/device/function tuples, with physical slots in
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the system. If you are unsure, say N.
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To compile this driver as a module, choose M here:
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the module will be called pci_slot.
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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 "Container and Module Devices (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 driver supports ACPI Container and Module devices (IDs
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ACPI0004, PNP0A05, and PNP0A06).
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This helps support hotplug of nodes, CPUs, and memory.
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To compile this driver as a module, choose M here:
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the module will be called 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 supports ACPI memory hotplug. The driver
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fields notifications on ACPI memory devices (PNP0C80),
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which represent memory ranges that may be onlined or
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offlined during runtime.
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If your hardware and firmware do not support adding or
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removing memory devices at runtime, you need not enable
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this driver.
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To compile this driver as a module, choose M here:
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the module will be called 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 supports the Smart Battery System, another
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type of access to battery information, found on some laptops.
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To compile this driver as a module, choose M here:
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the modules will be called sbs and sbshc.
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config ACPI_HED
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tristate "Hardware Error Device"
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help
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This driver supports the Hardware Error Device (PNP0C33),
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which is used to report some hardware errors notified via
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SCI, mainly the corrected errors.
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source "drivers/acpi/apei/Kconfig"
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endif # ACPI
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