| # SPDX-License-Identifier: GPL-2.0 | |
| # | |
| # ACPI Configuration | |
| # | |
| config ARCH_SUPPORTS_ACPI | |
| bool | |
| menuconfig ACPI | |
| bool "ACPI (Advanced Configuration and Power Interface) Support" | |
| depends on ARCH_SUPPORTS_ACPI | |
| select PNP | |
| select NLS | |
| default y if X86 | |
| help | |
| Advanced Configuration and Power Interface (ACPI) support for | |
| Linux requires an ACPI-compliant platform (hardware/firmware), | |
| and assumes the presence of OS-directed configuration and power | |
| management (OSPM) software. This option will enlarge your | |
| kernel by about 70K. | |
| Linux ACPI provides a robust functional replacement for several | |
| legacy configuration and power management interfaces, including | |
| the Plug-and-Play BIOS specification (PnP BIOS), the | |
| MultiProcessor Specification (MPS), and the Advanced Power | |
| Management (APM) specification. If both ACPI and APM support | |
| are configured, ACPI is used. | |
| The project home page for the Linux ACPI subsystem is here: | |
| <https://01.org/linux-acpi> | |
| Linux support for ACPI is based on Intel Corporation's ACPI | |
| Component Architecture (ACPI CA). For more information on the | |
| ACPI CA, see: | |
| <http://acpica.org/> | |
| ACPI is an open industry specification originally co-developed by | |
| Hewlett-Packard, Intel, Microsoft, Phoenix, and Toshiba. Currently, | |
| it is developed by the ACPI Specification Working Group (ASWG) under | |
| the UEFI Forum and any UEFI member can join the ASWG and contribute | |
| to the ACPI specification. | |
| The specification is available at: | |
| <http://www.acpi.info> | |
| <http://www.uefi.org/acpi/specs> | |
| if ACPI | |
| config ACPI_LEGACY_TABLES_LOOKUP | |
| bool | |
| config ARCH_MIGHT_HAVE_ACPI_PDC | |
| bool | |
| config ACPI_GENERIC_GSI | |
| bool | |
| config ACPI_SYSTEM_POWER_STATES_SUPPORT | |
| bool | |
| config ACPI_CCA_REQUIRED | |
| bool | |
| config ACPI_DEBUGGER | |
| bool "AML debugger interface" | |
| select ACPI_DEBUG | |
| help | |
| Enable in-kernel debugging of AML facilities: statistics, | |
| internal object dump, single step control method execution. | |
| This is still under development, currently enabling this only | |
| results in the compilation of the ACPICA debugger files. | |
| if ACPI_DEBUGGER | |
| config ACPI_DEBUGGER_USER | |
| tristate "Userspace debugger accessiblity" | |
| depends on DEBUG_FS | |
| help | |
| Export /sys/kernel/debug/acpi/acpidbg for userspace utilities | |
| to access the debugger functionalities. | |
| endif | |
| config ACPI_SPCR_TABLE | |
| bool "ACPI Serial Port Console Redirection Support" | |
| default y if X86 | |
| help | |
| Enable support for Serial Port Console Redirection (SPCR) Table. | |
| This table provides information about the configuration of the | |
| earlycon console. | |
| config ACPI_LPIT | |
| bool | |
| depends on X86_64 | |
| default y | |
| config ACPI_SLEEP | |
| bool | |
| depends on SUSPEND || HIBERNATION | |
| depends on ACPI_SYSTEM_POWER_STATES_SUPPORT | |
| default y | |
| config ACPI_PROCFS_POWER | |
| bool "Deprecated power /proc/acpi directories" | |
| depends on X86 && PROC_FS | |
| help | |
| For backwards compatibility, this option allows | |
| deprecated power /proc/acpi/ directories to exist, even when | |
| they have been replaced by functions in /sys. | |
| The deprecated directories (and their replacements) include: | |
| /proc/acpi/battery/* (/sys/class/power_supply/*) and | |
| /proc/acpi/ac_adapter/* (sys/class/power_supply/*). | |
| This option has no effect on /proc/acpi/ directories | |
| and functions which do not yet exist in /sys. | |
| This option, together with the proc directories, will be | |
| deleted in the future. | |
| Say N to delete power /proc/acpi/ directories that have moved to /sys. | |
| config ACPI_REV_OVERRIDE_POSSIBLE | |
| bool "Allow supported ACPI revision to be overridden" | |
| depends on X86 | |
| default y | |
| help | |
| The platform firmware on some systems expects Linux to return "5" as | |
| the supported ACPI revision which makes it expose system configuration | |
| information in a special way. | |
| For example, based on what ACPI exports as the supported revision, | |
| Dell XPS 13 (2015) configures its audio device to either work in HDA | |
| mode or in I2S mode, where the former is supposed to be used on Linux | |
| until the latter is fully supported (in the kernel as well as in user | |
| space). | |
| This option enables a DMI-based quirk for the above Dell machine (so | |
| that HDA audio is exposed by the platform firmware to the kernel) and | |
| makes it possible to force the kernel to return "5" as the supported | |
| ACPI revision via the "acpi_rev_override" command line switch. | |
| config ACPI_EC_DEBUGFS | |
| tristate "EC read/write access through /sys/kernel/debug/ec" | |
| help | |
| Say N to disable Embedded Controller /sys/kernel/debug interface | |
| Be aware that using this interface can confuse your Embedded | |
| Controller in a way that a normal reboot is not enough. You then | |
| have to power off your system, and remove the laptop battery for | |
| some seconds. | |
| An Embedded Controller typically is available on laptops and reads | |
| sensor values like battery state and temperature. | |
| The kernel accesses the EC through ACPI parsed code provided by BIOS | |
| tables. This option allows to access the EC directly without ACPI | |
| code being involved. | |
| Thus this option is a debug option that helps to write ACPI drivers | |
| and can be used to identify ACPI code or EC firmware bugs. | |
| config ACPI_AC | |
| tristate "AC Adapter" | |
| select POWER_SUPPLY | |
| default y | |
| help | |
| This driver supports the AC Adapter object, which indicates | |
| whether a system is on AC or not. If you have a system that can | |
| switch between A/C and battery, say Y. | |
| To compile this driver as a module, choose M here: | |
| the module will be called ac. | |
| config ACPI_BATTERY | |
| tristate "Battery" | |
| select POWER_SUPPLY | |
| default y | |
| help | |
| This driver adds support for battery information through | |
| /proc/acpi/battery. If you have a mobile system with a battery, | |
| say Y. | |
| To compile this driver as a module, choose M here: | |
| the module will be called battery. | |
| config ACPI_BUTTON | |
| tristate "Button" | |
| depends on INPUT | |
| default y | |
| help | |
| This driver handles events on the power, sleep, and lid buttons. | |
| A daemon reads events from input devices or via netlink and | |
| performs user-defined actions such as shutting down the system. | |
| This is necessary for software-controlled poweroff. | |
| To compile this driver as a module, choose M here: | |
| the module will be called button. | |
| config ACPI_VIDEO | |
| tristate "Video" | |
| depends on X86 && BACKLIGHT_CLASS_DEVICE | |
| depends on INPUT | |
| select THERMAL | |
| help | |
| This driver implements the ACPI Extensions For Display Adapters | |
| for integrated graphics devices on motherboard, as specified in | |
| ACPI 2.0 Specification, Appendix B. This supports basic operations | |
| such as defining the video POST device, retrieving EDID information, | |
| and setting up a video output. | |
| To compile this driver as a module, choose M here: | |
| the module will be called video. | |
| config ACPI_FAN | |
| tristate "Fan" | |
| depends on THERMAL | |
| default y | |
| help | |
| This driver supports ACPI fan devices, allowing user-mode | |
| applications to perform basic fan control (on, off, status). | |
| To compile this driver as a module, choose M here: | |
| the module will be called fan. | |
| config ACPI_TAD | |
| tristate "ACPI Time and Alarm (TAD) Device Support" | |
| depends on SYSFS && PM_SLEEP | |
| help | |
| The ACPI Time and Alarm (TAD) device is an alternative to the Real | |
| Time Clock (RTC). Its wake timers allow the system to transition from | |
| the S3 (or optionally S4/S5) state to S0 state after a time period | |
| elapses. In comparison with the RTC Alarm, the TAD provides a larger | |
| scale of flexibility in the wake timers. The time capabilities of the | |
| TAD maintain the time of day information across platform power | |
| transitions, and keep track of time even when the platform is turned | |
| off. | |
| config ACPI_DOCK | |
| bool "Dock" | |
| help | |
| This driver supports ACPI-controlled docking stations and removable | |
| drive bays such as the IBM Ultrabay and the Dell Module Bay. | |
| config ACPI_CPU_FREQ_PSS | |
| bool | |
| select THERMAL | |
| config ACPI_PROCESSOR_CSTATE | |
| def_bool y | |
| depends on IA64 || X86 | |
| config ACPI_PROCESSOR_IDLE | |
| bool | |
| select CPU_IDLE | |
| config ACPI_MCFG | |
| bool | |
| config ACPI_CPPC_LIB | |
| bool | |
| depends on ACPI_PROCESSOR | |
| select MAILBOX | |
| select PCC | |
| help | |
| If this option is enabled, this file implements common functionality | |
| to parse CPPC tables as described in the ACPI 5.1+ spec. The | |
| routines implemented are meant to be used by other | |
| drivers to control CPU performance using CPPC semantics. | |
| If your platform does not support CPPC in firmware, | |
| leave this option disabled. | |
| config ACPI_PROCESSOR | |
| tristate "Processor" | |
| depends on X86 || IA64 || ARM64 | |
| select ACPI_PROCESSOR_IDLE | |
| select ACPI_CPU_FREQ_PSS if X86 || IA64 | |
| default y | |
| help | |
| This driver adds support for the ACPI Processor package. It is required | |
| by several flavors of cpufreq performance-state, thermal, throttling and | |
| idle drivers. | |
| To compile this driver as a module, choose M here: | |
| the module will be called processor. | |
| config ACPI_IPMI | |
| tristate "IPMI" | |
| depends on IPMI_HANDLER | |
| help | |
| This driver enables the ACPI to access the BMC controller. And it | |
| uses the IPMI request/response message to communicate with BMC | |
| controller, which can be found on on the server. | |
| To compile this driver as a module, choose M here: | |
| the module will be called as acpi_ipmi. | |
| config ACPI_HOTPLUG_CPU | |
| bool | |
| depends on ACPI_PROCESSOR && HOTPLUG_CPU | |
| select ACPI_CONTAINER | |
| default y | |
| config ACPI_PROCESSOR_AGGREGATOR | |
| tristate "Processor Aggregator" | |
| depends on ACPI_PROCESSOR | |
| depends on X86 | |
| help | |
| ACPI 4.0 defines processor Aggregator, which enables OS to perform | |
| specific processor configuration and control that applies to all | |
| processors in the platform. Currently only logical processor idling | |
| is defined, which is to reduce power consumption. This driver | |
| supports the new device. | |
| config ACPI_THERMAL | |
| tristate "Thermal Zone" | |
| depends on ACPI_PROCESSOR | |
| select THERMAL | |
| default y | |
| help | |
| This driver supports ACPI thermal zones. Most mobile and | |
| some desktop systems support ACPI thermal zones. It is HIGHLY | |
| recommended that this option be enabled, as your processor(s) | |
| may be damaged without it. | |
| To compile this driver as a module, choose M here: | |
| the module will be called thermal. | |
| config ACPI_NUMA | |
| bool "NUMA support" | |
| depends on NUMA | |
| depends on (X86 || IA64 || ARM64) | |
| default y if IA64_GENERIC || IA64_SGI_SN2 || ARM64 | |
| config ACPI_CUSTOM_DSDT_FILE | |
| string "Custom DSDT Table file to include" | |
| default "" | |
| depends on !STANDALONE | |
| help | |
| This option supports a custom DSDT by linking it into the kernel. | |
| See Documentation/admin-guide/acpi/dsdt-override.rst | |
| Enter the full path name to the file which includes the AmlCode | |
| or dsdt_aml_code declaration. | |
| If unsure, don't enter a file name. | |
| config ACPI_CUSTOM_DSDT | |
| bool | |
| default ACPI_CUSTOM_DSDT_FILE != "" | |
| config ARCH_HAS_ACPI_TABLE_UPGRADE | |
| def_bool n | |
| config ACPI_TABLE_UPGRADE | |
| bool "Allow upgrading ACPI tables via initrd" | |
| depends on BLK_DEV_INITRD && ARCH_HAS_ACPI_TABLE_UPGRADE | |
| default y | |
| help | |
| This option provides functionality to upgrade arbitrary ACPI tables | |
| via initrd. No functional change if no ACPI tables are passed via | |
| initrd, therefore it's safe to say Y. | |
| See Documentation/admin-guide/acpi/initrd_table_override.rst for details | |
| config ACPI_TABLE_OVERRIDE_VIA_BUILTIN_INITRD | |
| bool "Override ACPI tables from built-in initrd" | |
| depends on ACPI_TABLE_UPGRADE | |
| depends on INITRAMFS_SOURCE!="" && INITRAMFS_COMPRESSION="" | |
| help | |
| This option provides functionality to override arbitrary ACPI tables | |
| from built-in uncompressed initrd. | |
| See Documentation/admin-guide/acpi/initrd_table_override.rst for details | |
| config ACPI_DEBUG | |
| bool "Debug Statements" | |
| help | |
| The ACPI subsystem can produce debug output. Saying Y enables this | |
| output and increases the kernel size by around 50K. | |
| Use the acpi.debug_layer and acpi.debug_level kernel command-line | |
| parameters documented in Documentation/firmware-guide/acpi/debug.rst and | |
| Documentation/admin-guide/kernel-parameters.rst to control the type and | |
| amount of debug output. | |
| config ACPI_PCI_SLOT | |
| bool "PCI slot detection driver" | |
| depends on SYSFS && PCI | |
| help | |
| This driver creates entries in /sys/bus/pci/slots/ for all PCI | |
| slots in the system. This can help correlate PCI bus addresses, | |
| i.e., segment/bus/device/function tuples, with physical slots in | |
| the system. If you are unsure, say N. | |
| config ACPI_CONTAINER | |
| bool "Container and Module Devices" | |
| default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU) | |
| help | |
| This driver supports ACPI Container and Module devices (IDs | |
| ACPI0004, PNP0A05, and PNP0A06). | |
| This helps support hotplug of nodes, CPUs, and memory. | |
| To compile this driver as a module, choose M here: | |
| the module will be called container. | |
| config ACPI_HOTPLUG_MEMORY | |
| bool "Memory Hotplug" | |
| depends on MEMORY_HOTPLUG | |
| help | |
| This driver supports ACPI memory hotplug. The driver | |
| fields notifications on ACPI memory devices (PNP0C80), | |
| which represent memory ranges that may be onlined or | |
| offlined during runtime. | |
| If your hardware and firmware do not support adding or | |
| removing memory devices at runtime, you need not enable | |
| this driver. | |
| To compile this driver as a module, choose M here: | |
| the module will be called acpi_memhotplug. | |
| config ACPI_HOTPLUG_IOAPIC | |
| bool | |
| depends on PCI | |
| depends on X86_IO_APIC | |
| default y | |
| config ACPI_SBS | |
| tristate "Smart Battery System" | |
| depends on X86 | |
| select POWER_SUPPLY | |
| help | |
| This driver supports the Smart Battery System, another | |
| type of access to battery information, found on some laptops. | |
| To compile this driver as a module, choose M here: | |
| the modules will be called sbs and sbshc. | |
| config ACPI_HED | |
| tristate "Hardware Error Device" | |
| help | |
| This driver supports the Hardware Error Device (PNP0C33), | |
| which is used to report some hardware errors notified via | |
| SCI, mainly the corrected errors. | |
| config ACPI_CUSTOM_METHOD | |
| tristate "Allow ACPI methods to be inserted/replaced at run time" | |
| depends on DEBUG_FS | |
| help | |
| This debug facility allows ACPI AML methods to be inserted and/or | |
| replaced without rebooting the system. For details refer to: | |
| Documentation/firmware-guide/acpi/method-customizing.rst. | |
| NOTE: This option is security sensitive, because it allows arbitrary | |
| kernel memory to be written to by root (uid=0) users, allowing them | |
| to bypass certain security measures (e.g. if root is not allowed to | |
| load additional kernel modules after boot, this feature may be used | |
| to override that restriction). | |
| config ACPI_BGRT | |
| bool "Boottime Graphics Resource Table support" | |
| depends on EFI && (X86 || ARM64) | |
| help | |
| This driver adds support for exposing the ACPI Boottime Graphics | |
| Resource Table, which allows the operating system to obtain | |
| data from the firmware boot splash. It will appear under | |
| /sys/firmware/acpi/bgrt/ . | |
| config ACPI_REDUCED_HARDWARE_ONLY | |
| bool "Hardware-reduced ACPI support only" if EXPERT | |
| def_bool n | |
| help | |
| This config item changes the way the ACPI code is built. When this | |
| option is selected, the kernel will use a specialized version of | |
| ACPICA that ONLY supports the ACPI "reduced hardware" mode. The | |
| resulting kernel will be smaller but it will also be restricted to | |
| running in ACPI reduced hardware mode ONLY. | |
| If you are unsure what to do, do not enable this option. | |
| source "drivers/acpi/nfit/Kconfig" | |
| source "drivers/acpi/hmat/Kconfig" | |
| source "drivers/acpi/apei/Kconfig" | |
| source "drivers/acpi/dptf/Kconfig" | |
| config ACPI_WATCHDOG | |
| bool | |
| config ACPI_EXTLOG | |
| tristate "Extended Error Log support" | |
| depends on X86_MCE && X86_LOCAL_APIC && EDAC | |
| select UEFI_CPER | |
| help | |
| Certain usages such as Predictive Failure Analysis (PFA) require | |
| more information about the error than what can be described in | |
| processor machine check banks. Most server processors log | |
| additional information about the error in processor uncore | |
| registers. Since the addresses and layout of these registers vary | |
| widely from one processor to another, system software cannot | |
| readily make use of them. To complicate matters further, some of | |
| the additional error information cannot be constructed without | |
| detailed knowledge about platform topology. | |
| Enhanced MCA Logging allows firmware to provide additional error | |
| information to system software, synchronous with MCE or CMCI. This | |
| driver adds support for that functionality with corresponding | |
| tracepoint which carries that information to userspace. | |
| config ACPI_ADXL | |
| bool | |
| menuconfig PMIC_OPREGION | |
| bool "PMIC (Power Management Integrated Circuit) operation region support" | |
| help | |
| Select this option to enable support for ACPI operation | |
| region of the PMIC chip. The operation region can be used | |
| to control power rails and sensor reading/writing on the | |
| PMIC chip. | |
| if PMIC_OPREGION | |
| config CRC_PMIC_OPREGION | |
| bool "ACPI operation region support for CrystalCove PMIC" | |
| depends on INTEL_SOC_PMIC | |
| help | |
| This config adds ACPI operation region support for CrystalCove PMIC. | |
| config XPOWER_PMIC_OPREGION | |
| bool "ACPI operation region support for XPower AXP288 PMIC" | |
| depends on MFD_AXP20X_I2C && IOSF_MBI=y | |
| help | |
| This config adds ACPI operation region support for XPower AXP288 PMIC. | |
| config BXT_WC_PMIC_OPREGION | |
| bool "ACPI operation region support for BXT WhiskeyCove PMIC" | |
| depends on INTEL_SOC_PMIC_BXTWC | |
| help | |
| This config adds ACPI operation region support for BXT WhiskeyCove PMIC. | |
| config CHT_WC_PMIC_OPREGION | |
| bool "ACPI operation region support for CHT Whiskey Cove PMIC" | |
| depends on INTEL_SOC_PMIC_CHTWC | |
| help | |
| This config adds ACPI operation region support for CHT Whiskey Cove PMIC. | |
| config CHT_DC_TI_PMIC_OPREGION | |
| bool "ACPI operation region support for Dollar Cove TI PMIC" | |
| depends on INTEL_SOC_PMIC_CHTDC_TI | |
| help | |
| This config adds ACPI operation region support for Dollar Cove TI PMIC. | |
| endif | |
| config ACPI_CONFIGFS | |
| tristate "ACPI configfs support" | |
| select CONFIGFS_FS | |
| help | |
| Select this option to enable support for ACPI configuration from | |
| userspace. The configurable ACPI groups will be visible under | |
| /config/acpi, assuming configfs is mounted under /config. | |
| if ARM64 | |
| source "drivers/acpi/arm64/Kconfig" | |
| config ACPI_PPTT | |
| bool | |
| endif | |
| config TPS68470_PMIC_OPREGION | |
| bool "ACPI operation region support for TPS68470 PMIC" | |
| depends on MFD_TPS68470 | |
| help | |
| This config adds ACPI operation region support for TI TPS68470 PMIC. | |
| TPS68470 device is an advanced power management unit that powers | |
| a Compact Camera Module (CCM), generates clocks for image sensors, | |
| drives a dual LED for flash and incorporates two LED drivers for | |
| general purpose indicators. | |
| This driver enables ACPI operation region support control voltage | |
| regulators and clocks. | |
| This option is a bool as it provides an ACPI operation | |
| region, which must be available before any of the devices | |
| using this, are probed. | |
| endif # ACPI | |
| config X86_PM_TIMER | |
| bool "Power Management Timer Support" if EXPERT | |
| depends on X86 && (ACPI || JAILHOUSE_GUEST) | |
| default y | |
| help | |
| The Power Management Timer is available on all ACPI-capable, | |
| in most cases even if ACPI is unusable or blacklisted. | |
| This timing source is not affected by power management features | |
| like aggressive processor idling, throttling, frequency and/or | |
| voltage scaling, unlike the commonly used Time Stamp Counter | |
| (TSC) timing source. | |
| You should nearly always say Y here because many modern | |
| systems require this timer. |