1# SPDX-License-Identifier: GPL-2.0
2#
3# ACPI Configuration
4#
5
6config ARCH_SUPPORTS_ACPI
7	bool
8
9menuconfig ACPI
10	bool "ACPI (Advanced Configuration and Power Interface) Support"
11	depends on ARCH_SUPPORTS_ACPI
12	depends on PCI
13	select PNP
14	default y if X86
15	help
16	  Advanced Configuration and Power Interface (ACPI) support for
17	  Linux requires an ACPI-compliant platform (hardware/firmware),
18	  and assumes the presence of OS-directed configuration and power
19	  management (OSPM) software.  This option will enlarge your
20	  kernel by about 70K.
21
22	  Linux ACPI provides a robust functional replacement for several
23	  legacy configuration and power management interfaces, including
24	  the Plug-and-Play BIOS specification (PnP BIOS), the
25	  MultiProcessor Specification (MPS), and the Advanced Power
26	  Management (APM) specification.  If both ACPI and APM support
27	  are configured, ACPI is used.
28
29	  The project home page for the Linux ACPI subsystem is here:
30	  <https://01.org/linux-acpi>
31
32	  Linux support for ACPI is based on Intel Corporation's ACPI
33	  Component Architecture (ACPI CA).  For more information on the
34	  ACPI CA, see:
35	  <http://acpica.org/>
36
37	  ACPI is an open industry specification originally co-developed by
38	  Hewlett-Packard, Intel, Microsoft, Phoenix, and Toshiba. Currently,
39	  it is developed by the ACPI Specification Working Group (ASWG) under
40	  the UEFI Forum and any UEFI member can join the ASWG and contribute
41	  to the ACPI specification.
42	  The specification is available at:
43	  <http://www.acpi.info>
44	  <http://www.uefi.org/acpi/specs>
45
46if ACPI
47
48config ACPI_LEGACY_TABLES_LOOKUP
49	bool
50
51config ARCH_MIGHT_HAVE_ACPI_PDC
52	bool
53
54config ACPI_GENERIC_GSI
55	bool
56
57config ACPI_SYSTEM_POWER_STATES_SUPPORT
58	bool
59
60config ACPI_CCA_REQUIRED
61	bool
62
63config ACPI_DEBUGGER
64	bool "AML debugger interface"
65	select ACPI_DEBUG
66	help
67	  Enable in-kernel debugging of AML facilities: statistics,
68	  internal object dump, single step control method execution.
69	  This is still under development, currently enabling this only
70	  results in the compilation of the ACPICA debugger files.
71
72if ACPI_DEBUGGER
73
74config ACPI_DEBUGGER_USER
75	tristate "Userspace debugger accessiblity"
76	depends on DEBUG_FS
77	help
78	  Export /sys/kernel/debug/acpi/acpidbg for userspace utilities
79	  to access the debugger functionalities.
80
81endif
82
83config ACPI_SPCR_TABLE
84	bool "ACPI Serial Port Console Redirection Support"
85	default y if X86
86	help
87	  Enable support for Serial Port Console Redirection (SPCR) Table.
88	  This table provides information about the configuration of the
89	  earlycon console.
90
91config ACPI_LPIT
92	bool
93	depends on X86_64
94	default y
95
96config ACPI_SLEEP
97	bool
98	depends on SUSPEND || HIBERNATION
99	depends on ACPI_SYSTEM_POWER_STATES_SUPPORT
100	default y
101
102config ACPI_PROCFS_POWER
103	bool "Deprecated power /proc/acpi directories"
104	depends on X86 && PROC_FS
105	help
106	  For backwards compatibility, this option allows
107          deprecated power /proc/acpi/ directories to exist, even when
108          they have been replaced by functions in /sys.
109          The deprecated directories (and their replacements) include:
110	  /proc/acpi/battery/* (/sys/class/power_supply/*) and
111	  /proc/acpi/ac_adapter/* (sys/class/power_supply/*).
112	  This option has no effect on /proc/acpi/ directories
113	  and functions which do not yet exist in /sys.
114	  This option, together with the proc directories, will be
115	  deleted in the future.
116
117	  Say N to delete power /proc/acpi/ directories that have moved to /sys.
118
119config ACPI_REV_OVERRIDE_POSSIBLE
120	bool "Allow supported ACPI revision to be overridden"
121	depends on X86
122	default y
123	help
124	  The platform firmware on some systems expects Linux to return "5" as
125	  the supported ACPI revision which makes it expose system configuration
126	  information in a special way.
127
128	  For example, based on what ACPI exports as the supported revision,
129	  Dell XPS 13 (2015) configures its audio device to either work in HDA
130	  mode or in I2S mode, where the former is supposed to be used on Linux
131	  until the latter is fully supported (in the kernel as well as in user
132	  space).
133
134	  This option enables a DMI-based quirk for the above Dell machine (so
135	  that HDA audio is exposed by the platform firmware to the kernel) and
136	  makes it possible to force the kernel to return "5" as the supported
137	  ACPI revision via the "acpi_rev_override" command line switch.
138
139config ACPI_EC_DEBUGFS
140	tristate "EC read/write access through /sys/kernel/debug/ec"
141	default n
142	help
143	  Say N to disable Embedded Controller /sys/kernel/debug interface
144
145	  Be aware that using this interface can confuse your Embedded
146	  Controller in a way that a normal reboot is not enough. You then
147	  have to power off your system, and remove the laptop battery for
148	  some seconds.
149	  An Embedded Controller typically is available on laptops and reads
150	  sensor values like battery state and temperature.
151	  The kernel accesses the EC through ACPI parsed code provided by BIOS
152	  tables. This option allows to access the EC directly without ACPI
153	  code being involved.
154	  Thus this option is a debug option that helps to write ACPI drivers
155	  and can be used to identify ACPI code or EC firmware bugs.
156
157config ACPI_AC
158	tristate "AC Adapter"
159	depends on X86
160	select POWER_SUPPLY
161	default y
162	help
163	  This driver supports the AC Adapter object, which indicates
164	  whether a system is on AC or not.  If you have a system that can
165	  switch between A/C and battery, say Y.
166
167	  To compile this driver as a module, choose M here:
168	  the module will be called ac.
169
170config ACPI_BATTERY
171	tristate "Battery"
172	depends on X86
173	select POWER_SUPPLY
174	default y
175	help
176	  This driver adds support for battery information through
177	  /proc/acpi/battery. If you have a mobile system with a battery,
178	  say Y.
179
180	  To compile this driver as a module, choose M here:
181	  the module will be called battery.
182
183config ACPI_BUTTON
184	tristate "Button"
185	depends on INPUT
186	default y
187	help
188	  This driver handles events on the power, sleep, and lid buttons.
189	  A daemon reads events from input devices or via netlink and
190	  performs user-defined actions such as shutting down the system.
191	  This is necessary for software-controlled poweroff.
192
193	  To compile this driver as a module, choose M here:
194	  the module will be called button.
195
196config ACPI_VIDEO
197	tristate "Video"
198	depends on X86 && BACKLIGHT_CLASS_DEVICE
199	depends on INPUT
200	select THERMAL
201	help
202	  This driver implements the ACPI Extensions For Display Adapters
203	  for integrated graphics devices on motherboard, as specified in
204	  ACPI 2.0 Specification, Appendix B.  This supports basic operations
205	  such as defining the video POST device, retrieving EDID information,
206	  and setting up a video output.
207
208	  To compile this driver as a module, choose M here:
209	  the module will be called video.
210
211config ACPI_FAN
212	tristate "Fan"
213	depends on THERMAL
214	default y
215	help
216	  This driver supports ACPI fan devices, allowing user-mode
217	  applications to perform basic fan control (on, off, status).
218
219	  To compile this driver as a module, choose M here:
220	  the module will be called fan.
221
222config ACPI_TAD
223	tristate "ACPI Time and Alarm (TAD) Device Support"
224	depends on SYSFS && PM_SLEEP
225	help
226	  The ACPI Time and Alarm (TAD) device is an alternative to the Real
227	  Time Clock (RTC).  Its wake timers allow the system to transition from
228	  the S3 (or optionally S4/S5) state to S0 state after a time period
229	  elapses.  In comparison with the RTC Alarm, the TAD provides a larger
230	  scale of flexibility in the wake timers.  The time capabilities of the
231	  TAD maintain the time of day information across platform power
232	  transitions, and keep track of time even when the platform is turned
233	  off.
234
235config ACPI_DOCK
236	bool "Dock"
237	help
238	  This driver supports ACPI-controlled docking stations and removable
239	  drive bays such as the IBM Ultrabay and the Dell Module Bay.
240
241config ACPI_CPU_FREQ_PSS
242	bool
243	select THERMAL
244
245config ACPI_PROCESSOR_CSTATE
246	def_bool y
247	depends on IA64 || X86
248
249config ACPI_PROCESSOR_IDLE
250	bool
251	select CPU_IDLE
252
253config ACPI_MCFG
254	bool
255
256config ACPI_CPPC_LIB
257	bool
258	depends on ACPI_PROCESSOR
259	select MAILBOX
260	select PCC
261	help
262	  If this option is enabled, this file implements common functionality
263	  to parse CPPC tables as described in the ACPI 5.1+ spec. The
264	  routines implemented are meant to be used by other
265	  drivers to control CPU performance using CPPC semantics.
266	  If your platform does not support CPPC in firmware,
267	  leave this option disabled.
268
269config ACPI_PROCESSOR
270	tristate "Processor"
271	depends on X86 || IA64 || ARM64
272	select ACPI_PROCESSOR_IDLE
273	select ACPI_CPU_FREQ_PSS if X86 || IA64
274	default y
275	help
276	  This driver adds support for the ACPI Processor package. It is required
277	  by several flavors of cpufreq performance-state, thermal, throttling and
278	  idle drivers.
279
280	  To compile this driver as a module, choose M here:
281	  the module will be called processor.
282
283config ACPI_IPMI
284	tristate "IPMI"
285	depends on IPMI_HANDLER
286	default n
287	help
288	  This driver enables the ACPI to access the BMC controller. And it
289	  uses the IPMI request/response message to communicate with BMC
290	  controller, which can be found on on the server.
291
292	  To compile this driver as a module, choose M here:
293	  the module will be called as acpi_ipmi.
294
295config ACPI_HOTPLUG_CPU
296	bool
297	depends on ACPI_PROCESSOR && HOTPLUG_CPU
298	select ACPI_CONTAINER
299	default y
300
301config ACPI_PROCESSOR_AGGREGATOR
302	tristate "Processor Aggregator"
303	depends on ACPI_PROCESSOR
304	depends on X86
305	help
306	  ACPI 4.0 defines processor Aggregator, which enables OS to perform
307	  specific processor configuration and control that applies to all
308	  processors in the platform. Currently only logical processor idling
309	  is defined, which is to reduce power consumption. This driver
310	  supports the new device.
311
312config ACPI_THERMAL
313	tristate "Thermal Zone"
314	depends on ACPI_PROCESSOR
315	select THERMAL
316	default y
317	help
318	  This driver supports ACPI thermal zones.  Most mobile and
319	  some desktop systems support ACPI thermal zones.  It is HIGHLY
320	  recommended that this option be enabled, as your processor(s)
321	  may be damaged without it.
322
323	  To compile this driver as a module, choose M here:
324	  the module will be called thermal.
325
326config ACPI_NUMA
327	bool "NUMA support"
328	depends on NUMA
329	depends on (X86 || IA64 || ARM64)
330	default y if IA64_GENERIC || IA64_SGI_SN2 || ARM64
331
332config ACPI_CUSTOM_DSDT_FILE
333	string "Custom DSDT Table file to include"
334	default ""
335	depends on !STANDALONE
336	help
337	  This option supports a custom DSDT by linking it into the kernel.
338	  See Documentation/acpi/dsdt-override.txt
339
340	  Enter the full path name to the file which includes the AmlCode
341	  declaration.
342
343	  If unsure, don't enter a file name.
344
345config ACPI_CUSTOM_DSDT
346	bool
347	default ACPI_CUSTOM_DSDT_FILE != ""
348
349config ARCH_HAS_ACPI_TABLE_UPGRADE
350	def_bool n
351
352config ACPI_TABLE_UPGRADE
353	bool "Allow upgrading ACPI tables via initrd"
354	depends on BLK_DEV_INITRD && ARCH_HAS_ACPI_TABLE_UPGRADE
355	default y
356	help
357	  This option provides functionality to upgrade arbitrary ACPI tables
358	  via initrd. No functional change if no ACPI tables are passed via
359	  initrd, therefore it's safe to say Y.
360	  See Documentation/acpi/initrd_table_override.txt for details
361
362config ACPI_DEBUG
363	bool "Debug Statements"
364	default n
365	help
366	  The ACPI subsystem can produce debug output.  Saying Y enables this
367	  output and increases the kernel size by around 50K.
368
369	  Use the acpi.debug_layer and acpi.debug_level kernel command-line
370	  parameters documented in Documentation/acpi/debug.txt and
371	  Documentation/admin-guide/kernel-parameters.rst to control the type and
372	  amount of debug output.
373
374config ACPI_PCI_SLOT
375	bool "PCI slot detection driver"
376	depends on SYSFS
377	default n
378	help
379	  This driver creates entries in /sys/bus/pci/slots/ for all PCI
380	  slots in the system.  This can help correlate PCI bus addresses,
381	  i.e., segment/bus/device/function tuples, with physical slots in
382	  the system.  If you are unsure, say N.
383
384config ACPI_CONTAINER
385	bool "Container and Module Devices"
386	default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU)
387	help
388	  This driver supports ACPI Container and Module devices (IDs
389	  ACPI0004, PNP0A05, and PNP0A06).
390
391	  This helps support hotplug of nodes, CPUs, and memory.
392
393	  To compile this driver as a module, choose M here:
394	  the module will be called container.
395
396config ACPI_HOTPLUG_MEMORY
397	bool "Memory Hotplug"
398	depends on MEMORY_HOTPLUG
399	help
400	  This driver supports ACPI memory hotplug.  The driver
401	  fields notifications on ACPI memory devices (PNP0C80),
402	  which represent memory ranges that may be onlined or
403	  offlined during runtime.
404
405	  If your hardware and firmware do not support adding or
406	  removing memory devices at runtime, you need not enable
407	  this driver.
408
409	  To compile this driver as a module, choose M here:
410	  the module will be called acpi_memhotplug.
411
412config ACPI_HOTPLUG_IOAPIC
413	bool
414	depends on PCI
415	depends on X86_IO_APIC
416	default y
417
418config ACPI_SBS
419	tristate "Smart Battery System"
420	depends on X86
421	select POWER_SUPPLY
422	help
423	  This driver supports the Smart Battery System, another
424	  type of access to battery information, found on some laptops.
425
426	  To compile this driver as a module, choose M here:
427	  the modules will be called sbs and sbshc.
428
429config ACPI_HED
430	tristate "Hardware Error Device"
431	help
432	  This driver supports the Hardware Error Device (PNP0C33),
433	  which is used to report some hardware errors notified via
434	  SCI, mainly the corrected errors.
435
436config ACPI_CUSTOM_METHOD
437	tristate "Allow ACPI methods to be inserted/replaced at run time"
438	depends on DEBUG_FS
439	default n
440	help
441	  This debug facility allows ACPI AML methods to be inserted and/or
442	  replaced without rebooting the system. For details refer to:
443	  Documentation/acpi/method-customizing.txt.
444
445	  NOTE: This option is security sensitive, because it allows arbitrary
446	  kernel memory to be written to by root (uid=0) users, allowing them
447	  to bypass certain security measures (e.g. if root is not allowed to
448	  load additional kernel modules after boot, this feature may be used
449	  to override that restriction).
450
451config ACPI_BGRT
452	bool "Boottime Graphics Resource Table support"
453	depends on EFI && (X86 || ARM64)
454        help
455	  This driver adds support for exposing the ACPI Boottime Graphics
456	  Resource Table, which allows the operating system to obtain
457	  data from the firmware boot splash. It will appear under
458	  /sys/firmware/acpi/bgrt/ .
459
460config ACPI_REDUCED_HARDWARE_ONLY
461	bool "Hardware-reduced ACPI support only" if EXPERT
462	def_bool n
463	help
464	  This config item changes the way the ACPI code is built.  When this
465	  option is selected, the kernel will use a specialized version of
466	  ACPICA that ONLY supports the ACPI "reduced hardware" mode.  The
467	  resulting kernel will be smaller but it will also be restricted to
468	  running in ACPI reduced hardware mode ONLY.
469
470	  If you are unsure what to do, do not enable this option.
471
472source "drivers/acpi/nfit/Kconfig"
473
474source "drivers/acpi/apei/Kconfig"
475source "drivers/acpi/dptf/Kconfig"
476
477config ACPI_WATCHDOG
478	bool
479
480config ACPI_EXTLOG
481	tristate "Extended Error Log support"
482	depends on X86_MCE && X86_LOCAL_APIC && EDAC
483	select UEFI_CPER
484	default n
485	help
486	  Certain usages such as Predictive Failure Analysis (PFA) require
487	  more information about the error than what can be described in
488	  processor machine check banks. Most server processors log
489	  additional information about the error in processor uncore
490	  registers. Since the addresses and layout of these registers vary
491	  widely from one processor to another, system software cannot
492	  readily make use of them. To complicate matters further, some of
493	  the additional error information cannot be constructed without
494	  detailed knowledge about platform topology.
495
496	  Enhanced MCA Logging allows firmware to provide additional error
497	  information to system software, synchronous with MCE or CMCI. This
498	  driver adds support for that functionality with corresponding
499	  tracepoint which carries that information to userspace.
500
501menuconfig PMIC_OPREGION
502	bool "PMIC (Power Management Integrated Circuit) operation region support"
503	help
504	  Select this option to enable support for ACPI operation
505	  region of the PMIC chip. The operation region can be used
506	  to control power rails and sensor reading/writing on the
507	  PMIC chip.
508
509if PMIC_OPREGION
510config CRC_PMIC_OPREGION
511	bool "ACPI operation region support for CrystalCove PMIC"
512	depends on INTEL_SOC_PMIC
513	help
514	  This config adds ACPI operation region support for CrystalCove PMIC.
515
516config XPOWER_PMIC_OPREGION
517	bool "ACPI operation region support for XPower AXP288 PMIC"
518	depends on MFD_AXP20X_I2C
519	help
520	  This config adds ACPI operation region support for XPower AXP288 PMIC.
521
522config BXT_WC_PMIC_OPREGION
523	bool "ACPI operation region support for BXT WhiskeyCove PMIC"
524	depends on INTEL_SOC_PMIC_BXTWC
525	help
526	  This config adds ACPI operation region support for BXT WhiskeyCove PMIC.
527
528config CHT_WC_PMIC_OPREGION
529	bool "ACPI operation region support for CHT Whiskey Cove PMIC"
530	depends on INTEL_SOC_PMIC_CHTWC
531	help
532	  This config adds ACPI operation region support for CHT Whiskey Cove PMIC.
533
534config CHT_DC_TI_PMIC_OPREGION
535	bool "ACPI operation region support for Dollar Cove TI PMIC"
536	depends on INTEL_SOC_PMIC_CHTDC_TI
537	help
538	  This config adds ACPI operation region support for Dollar Cove TI PMIC.
539
540endif
541
542config ACPI_CONFIGFS
543	tristate "ACPI configfs support"
544	select CONFIGFS_FS
545	help
546	  Select this option to enable support for ACPI configuration from
547	  userspace. The configurable ACPI groups will be visible under
548	  /config/acpi, assuming configfs is mounted under /config.
549
550if ARM64
551source "drivers/acpi/arm64/Kconfig"
552
553config ACPI_PPTT
554	bool
555endif
556
557config TPS68470_PMIC_OPREGION
558	bool "ACPI operation region support for TPS68470 PMIC"
559	depends on MFD_TPS68470
560	help
561	  This config adds ACPI operation region support for TI TPS68470 PMIC.
562	  TPS68470 device is an advanced power management unit that powers
563	  a Compact Camera Module (CCM), generates clocks for image sensors,
564	  drives a dual LED for flash and incorporates two LED drivers for
565	  general purpose indicators.
566	  This driver enables ACPI operation region support control voltage
567	  regulators and clocks.
568
569	  This option is a bool as it provides an ACPI operation
570	  region, which must be available before any of the devices
571	  using this, are probed.
572
573endif	# ACPI
574
575config X86_PM_TIMER
576	bool "Power Management Timer Support" if EXPERT
577	depends on X86 && (ACPI || JAILHOUSE_GUEST)
578	default y
579	help
580	  The Power Management Timer is available on all ACPI-capable,
581	  in most cases even if ACPI is unusable or blacklisted.
582
583	  This timing source is not affected by power management features
584	  like aggressive processor idling, throttling, frequency and/or
585	  voltage scaling, unlike the commonly used Time Stamp Counter
586	  (TSC) timing source.
587
588	  You should nearly always say Y here because many modern
589	  systems require this timer.
590