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1 | # |
2 | # ACPI Configuration |
3 | # |
4 | |
5 | menuconfig ACPI |
6 | bool "ACPI (Advanced Configuration and Power Interface) Support" |
7 | depends on !IA64_HP_SIM |
8 | depends on IA64 || X86 |
9 | depends on PCI |
10 | select PNP |
11 | default y |
12 | help |
13 | Advanced Configuration and Power Interface (ACPI) support for |
14 | Linux requires an ACPI-compliant platform (hardware/firmware), |
15 | and assumes the presence of OS-directed configuration and power |
16 | management (OSPM) software. This option will enlarge your |
17 | kernel by about 70K. |
18 | |
19 | Linux ACPI provides a robust functional replacement for several |
20 | legacy configuration and power management interfaces, including |
21 | the Plug-and-Play BIOS specification (PnP BIOS), the |
22 | MultiProcessor Specification (MPS), and the Advanced Power |
23 | Management (APM) specification. If both ACPI and APM support |
24 | are configured, ACPI is used. |
25 | |
26 | The project home page for the Linux ACPI subsystem is here: |
27 | <http://www.lesswatts.org/projects/acpi/> |
28 | |
29 | Linux support for ACPI is based on Intel Corporation's ACPI |
30 | Component Architecture (ACPI CA). For more information on the |
31 | ACPI CA, see: |
32 | <http://acpica.org/> |
33 | |
34 | ACPI is an open industry specification co-developed by |
35 | Hewlett-Packard, Intel, Microsoft, Phoenix, and Toshiba. |
36 | The specification is available at: |
37 | <http://www.acpi.info> |
38 | |
39 | if ACPI |
40 | |
41 | config ACPI_SLEEP |
42 | bool |
43 | depends on SUSPEND || HIBERNATION |
44 | default y |
45 | |
46 | config ACPI_PROCFS |
47 | bool "Deprecated /proc/acpi files" |
48 | depends on PROC_FS |
49 | help |
50 | For backwards compatibility, this option allows |
51 | deprecated /proc/acpi/ files to exist, even when |
52 | they have been replaced by functions in /sys. |
53 | |
54 | This option has no effect on /proc/acpi/ files |
55 | and functions which do not yet exist in /sys. |
56 | |
57 | Say N to delete /proc/acpi/ files that have moved to /sys/ |
58 | |
59 | config ACPI_PROCFS_POWER |
60 | bool "Deprecated power /proc/acpi directories" |
61 | depends on PROC_FS |
62 | help |
63 | For backwards compatibility, this option allows |
64 | deprecated power /proc/acpi/ directories to exist, even when |
65 | they have been replaced by functions in /sys. |
66 | The deprecated directories (and their replacements) include: |
67 | /proc/acpi/battery/* (/sys/class/power_supply/*) |
68 | /proc/acpi/ac_adapter/* (sys/class/power_supply/*) |
69 | This option has no effect on /proc/acpi/ directories |
70 | and functions, which do not yet exist in /sys |
71 | This option, together with the proc directories, will be |
72 | deleted in 2.6.39. |
73 | |
74 | Say N to delete power /proc/acpi/ directories that have moved to /sys/ |
75 | |
76 | config ACPI_EC_DEBUGFS |
77 | tristate "EC read/write access through /sys/kernel/debug/ec" |
78 | default n |
79 | help |
80 | Say N to disable Embedded Controller /sys/kernel/debug interface |
81 | |
82 | Be aware that using this interface can confuse your Embedded |
83 | Controller in a way that a normal reboot is not enough. You then |
84 | have to power off your system, and remove the laptop battery for |
85 | some seconds. |
86 | An Embedded Controller typically is available on laptops and reads |
87 | sensor values like battery state and temperature. |
88 | The kernel accesses the EC through ACPI parsed code provided by BIOS |
89 | tables. This option allows to access the EC directly without ACPI |
90 | code being involved. |
91 | Thus this option is a debug option that helps to write ACPI drivers |
92 | and can be used to identify ACPI code or EC firmware bugs. |
93 | |
94 | config ACPI_PROC_EVENT |
95 | bool "Deprecated /proc/acpi/event support" |
96 | depends on PROC_FS |
97 | default y |
98 | help |
99 | A user-space daemon, acpid, typically reads /proc/acpi/event |
100 | and handles all ACPI-generated events. |
101 | |
102 | These events are now delivered to user-space either |
103 | via the input layer or as netlink events. |
104 | |
105 | This build option enables the old code for legacy |
106 | user-space implementation. After some time, this will |
107 | be moved under CONFIG_ACPI_PROCFS, and then deleted. |
108 | |
109 | Say Y here to retain the old behaviour. Say N if your |
110 | user-space is newer than kernel 2.6.23 (September 2007). |
111 | |
112 | config ACPI_AC |
113 | tristate "AC Adapter" |
114 | depends on X86 |
115 | select POWER_SUPPLY |
116 | default y |
117 | help |
118 | This driver supports the AC Adapter object, which indicates |
119 | whether a system is on AC or not. If you have a system that can |
120 | switch between A/C and battery, say Y. |
121 | |
122 | To compile this driver as a module, choose M here: |
123 | the module will be called ac. |
124 | |
125 | config ACPI_BATTERY |
126 | tristate "Battery" |
127 | depends on X86 |
128 | select POWER_SUPPLY |
129 | default y |
130 | help |
131 | This driver adds support for battery information through |
132 | /proc/acpi/battery. If you have a mobile system with a battery, |
133 | say Y. |
134 | |
135 | To compile this driver as a module, choose M here: |
136 | the module will be called battery. |
137 | |
138 | config ACPI_BUTTON |
139 | tristate "Button" |
140 | depends on INPUT |
141 | default y |
142 | help |
143 | This driver handles events on the power, sleep, and lid buttons. |
144 | A daemon reads /proc/acpi/event and perform user-defined actions |
145 | such as shutting down the system. This is necessary for |
146 | software-controlled poweroff. |
147 | |
148 | To compile this driver as a module, choose M here: |
149 | the module will be called button. |
150 | |
151 | config ACPI_VIDEO |
152 | tristate "Video" |
153 | depends on X86 && BACKLIGHT_CLASS_DEVICE && VIDEO_OUTPUT_CONTROL |
154 | depends on INPUT |
155 | select THERMAL |
156 | help |
157 | This driver implements the ACPI Extensions For Display Adapters |
158 | for integrated graphics devices on motherboard, as specified in |
159 | ACPI 2.0 Specification, Appendix B. This supports basic operations |
160 | such as defining the video POST device, retrieving EDID information, |
161 | and setting up a video output. |
162 | |
163 | To compile this driver as a module, choose M here: |
164 | the module will be called video. |
165 | |
166 | config ACPI_FAN |
167 | tristate "Fan" |
168 | select THERMAL |
169 | default y |
170 | help |
171 | This driver supports ACPI fan devices, allowing user-mode |
172 | applications to perform basic fan control (on, off, status). |
173 | |
174 | To compile this driver as a module, choose M here: |
175 | the module will be called fan. |
176 | |
177 | config ACPI_DOCK |
178 | bool "Dock" |
179 | help |
180 | This driver supports ACPI-controlled docking stations and removable |
181 | drive bays such as the IBM Ultrabay and the Dell Module Bay. |
182 | |
183 | config ACPI_I2C |
184 | def_tristate I2C |
185 | depends on I2C |
186 | help |
187 | ACPI I2C enumeration support. |
188 | |
189 | config ACPI_PROCESSOR |
190 | tristate "Processor" |
191 | select THERMAL |
192 | select CPU_IDLE |
193 | default y |
194 | help |
195 | This driver installs ACPI as the idle handler for Linux and uses |
196 | ACPI C2 and C3 processor states to save power on systems that |
197 | support it. It is required by several flavors of cpufreq |
198 | performance-state drivers. |
199 | |
200 | To compile this driver as a module, choose M here: |
201 | the module will be called processor. |
202 | config ACPI_IPMI |
203 | tristate "IPMI" |
204 | depends on IPMI_SI && IPMI_HANDLER |
205 | default n |
206 | help |
207 | This driver enables the ACPI to access the BMC controller. And it |
208 | uses the IPMI request/response message to communicate with BMC |
209 | controller, which can be found on on the server. |
210 | |
211 | To compile this driver as a module, choose M here: |
212 | the module will be called as acpi_ipmi. |
213 | |
214 | config ACPI_HOTPLUG_CPU |
215 | bool |
216 | depends on ACPI_PROCESSOR && HOTPLUG_CPU |
217 | select ACPI_CONTAINER |
218 | default y |
219 | |
220 | config ACPI_PROCESSOR_AGGREGATOR |
221 | tristate "Processor Aggregator" |
222 | depends on ACPI_PROCESSOR |
223 | depends on X86 |
224 | help |
225 | ACPI 4.0 defines processor Aggregator, which enables OS to perform |
226 | specific processor configuration and control that applies to all |
227 | processors in the platform. Currently only logical processor idling |
228 | is defined, which is to reduce power consumption. This driver |
229 | supports the new device. |
230 | |
231 | config ACPI_THERMAL |
232 | tristate "Thermal Zone" |
233 | depends on ACPI_PROCESSOR |
234 | select THERMAL |
235 | default y |
236 | help |
237 | This driver supports ACPI thermal zones. Most mobile and |
238 | some desktop systems support ACPI thermal zones. It is HIGHLY |
239 | recommended that this option be enabled, as your processor(s) |
240 | may be damaged without it. |
241 | |
242 | To compile this driver as a module, choose M here: |
243 | the module will be called thermal. |
244 | |
245 | config ACPI_NUMA |
246 | bool "NUMA support" |
247 | depends on NUMA |
248 | depends on (X86 || IA64) |
249 | default y if IA64_GENERIC || IA64_SGI_SN2 |
250 | |
251 | config ACPI_CUSTOM_DSDT_FILE |
252 | string "Custom DSDT Table file to include" |
253 | default "" |
254 | depends on !STANDALONE |
255 | help |
256 | This option supports a custom DSDT by linking it into the kernel. |
257 | See Documentation/acpi/dsdt-override.txt |
258 | |
259 | Enter the full path name to the file which includes the AmlCode |
260 | declaration. |
261 | |
262 | If unsure, don't enter a file name. |
263 | |
264 | config ACPI_CUSTOM_DSDT |
265 | bool |
266 | default ACPI_CUSTOM_DSDT_FILE != "" |
267 | |
268 | config ACPI_INITRD_TABLE_OVERRIDE |
269 | bool "ACPI tables override via initrd" |
270 | depends on BLK_DEV_INITRD && X86 |
271 | default n |
272 | help |
273 | This option provides functionality to override arbitrary ACPI tables |
274 | via initrd. No functional change if no ACPI tables are passed via |
275 | initrd, therefore it's safe to say Y. |
276 | See Documentation/acpi/initrd_table_override.txt for details |
277 | |
278 | config ACPI_BLACKLIST_YEAR |
279 | int "Disable ACPI for systems before Jan 1st this year" if X86_32 |
280 | default 0 |
281 | help |
282 | Enter a 4-digit year, e.g., 2001, to disable ACPI by default |
283 | on platforms with DMI BIOS date before January 1st that year. |
284 | "acpi=force" can be used to override this mechanism. |
285 | |
286 | Enter 0 to disable this mechanism and allow ACPI to |
287 | run by default no matter what the year. (default) |
288 | |
289 | config ACPI_DEBUG |
290 | bool "Debug Statements" |
291 | default n |
292 | help |
293 | The ACPI subsystem can produce debug output. Saying Y enables this |
294 | output and increases the kernel size by around 50K. |
295 | |
296 | Use the acpi.debug_layer and acpi.debug_level kernel command-line |
297 | parameters documented in Documentation/acpi/debug.txt and |
298 | Documentation/kernel-parameters.txt to control the type and |
299 | amount of debug output. |
300 | |
301 | config ACPI_DEBUG_FUNC_TRACE |
302 | bool "Additionally enable ACPI function tracing" |
303 | default n |
304 | depends on ACPI_DEBUG |
305 | help |
306 | ACPI Debug Statements slow down ACPI processing. Function trace |
307 | is about half of the penalty and is rarely useful. |
308 | |
309 | config ACPI_PCI_SLOT |
310 | bool "PCI slot detection driver" |
311 | depends on SYSFS |
312 | default n |
313 | help |
314 | This driver creates entries in /sys/bus/pci/slots/ for all PCI |
315 | slots in the system. This can help correlate PCI bus addresses, |
316 | i.e., segment/bus/device/function tuples, with physical slots in |
317 | the system. If you are unsure, say N. |
318 | |
319 | config X86_PM_TIMER |
320 | bool "Power Management Timer Support" if EXPERT |
321 | depends on X86 |
322 | default y |
323 | help |
324 | The Power Management Timer is available on all ACPI-capable, |
325 | in most cases even if ACPI is unusable or blacklisted. |
326 | |
327 | This timing source is not affected by power management features |
328 | like aggressive processor idling, throttling, frequency and/or |
329 | voltage scaling, unlike the commonly used Time Stamp Counter |
330 | (TSC) timing source. |
331 | |
332 | You should nearly always say Y here because many modern |
333 | systems require this timer. |
334 | |
335 | config ACPI_CONTAINER |
336 | bool "Container and Module Devices" |
337 | default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU || ACPI_HOTPLUG_IO) |
338 | help |
339 | This driver supports ACPI Container and Module devices (IDs |
340 | ACPI0004, PNP0A05, and PNP0A06). |
341 | |
342 | This helps support hotplug of nodes, CPUs, and memory. |
343 | |
344 | To compile this driver as a module, choose M here: |
345 | the module will be called container. |
346 | |
347 | config ACPI_HOTPLUG_MEMORY |
348 | tristate "Memory Hotplug" |
349 | depends on MEMORY_HOTPLUG |
350 | default n |
351 | help |
352 | This driver supports ACPI memory hotplug. The driver |
353 | fields notifications on ACPI memory devices (PNP0C80), |
354 | which represent memory ranges that may be onlined or |
355 | offlined during runtime. |
356 | |
357 | If your hardware and firmware do not support adding or |
358 | removing memory devices at runtime, you need not enable |
359 | this driver. |
360 | |
361 | To compile this driver as a module, choose M here: |
362 | the module will be called acpi_memhotplug. |
363 | |
364 | config ACPI_SBS |
365 | tristate "Smart Battery System" |
366 | depends on X86 |
367 | select POWER_SUPPLY |
368 | help |
369 | This driver supports the Smart Battery System, another |
370 | type of access to battery information, found on some laptops. |
371 | |
372 | To compile this driver as a module, choose M here: |
373 | the modules will be called sbs and sbshc. |
374 | |
375 | config ACPI_HED |
376 | tristate "Hardware Error Device" |
377 | help |
378 | This driver supports the Hardware Error Device (PNP0C33), |
379 | which is used to report some hardware errors notified via |
380 | SCI, mainly the corrected errors. |
381 | |
382 | config ACPI_CUSTOM_METHOD |
383 | tristate "Allow ACPI methods to be inserted/replaced at run time" |
384 | depends on DEBUG_FS |
385 | default n |
386 | help |
387 | This debug facility allows ACPI AML methods to be inserted and/or |
388 | replaced without rebooting the system. For details refer to: |
389 | Documentation/acpi/method-customizing.txt. |
390 | |
391 | NOTE: This option is security sensitive, because it allows arbitrary |
392 | kernel memory to be written to by root (uid=0) users, allowing them |
393 | to bypass certain security measures (e.g. if root is not allowed to |
394 | load additional kernel modules after boot, this feature may be used |
395 | to override that restriction). |
396 | |
397 | config ACPI_BGRT |
398 | bool "Boottime Graphics Resource Table support" |
399 | depends on EFI && X86 |
400 | help |
401 | This driver adds support for exposing the ACPI Boottime Graphics |
402 | Resource Table, which allows the operating system to obtain |
403 | data from the firmware boot splash. It will appear under |
404 | /sys/firmware/acpi/bgrt/ . |
405 | |
406 | source "drivers/acpi/apei/Kconfig" |
407 | |
408 | endif # ACPI |
409 |
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