view linux-2.6-xen-sparse/drivers/acpi/Kconfig @ 10323:a936c9c3ea60

[LINUX] Clean up unused variable in mm/memory.c.
Signed-off-by: Akio Takebe <>
date Mon Jun 12 09:57:23 2006 +0100 (2006-06-12)
parents 3b74edc512b4
children 4fad820a2233
line source
1 #
2 # ACPI Configuration
3 #
5 menu "ACPI (Advanced Configuration and Power Interface) Support"
6 depends on !X86_VISWS
7 depends on !IA64_HP_SIM
8 depends on IA64 || X86
10 config ACPI
11 bool "ACPI Support"
12 depends on IA64 || X86
13 select PM
14 select PCI
16 default y
17 ---help---
18 Advanced Configuration and Power Interface (ACPI) support for
19 Linux requires an ACPI compliant platform (hardware/firmware),
20 and assumes the presence of OS-directed configuration and power
21 management (OSPM) software. This option will enlarge your
22 kernel by about 70K.
24 Linux ACPI provides a robust functional replacement for several
25 legacy configuration and power management interfaces, including
26 the Plug-and-Play BIOS specification (PnP BIOS), the
27 MultiProcessor Specification (MPS), and the Advanced Power
28 Management (APM) specification. If both ACPI and APM support
29 are configured, whichever is loaded first shall be used.
31 The ACPI SourceForge project contains the latest source code,
32 documentation, tools, mailing list subscription, and other
33 information. This project is available at:
34 <>
36 Linux support for ACPI is based on Intel Corporation's ACPI
37 Component Architecture (ACPI CA). For more information see:
38 <>
40 ACPI is an open industry specification co-developed by Compaq,
41 Intel, Microsoft, Phoenix, and Toshiba. The specification is
42 available at:
43 <>
45 if ACPI
47 config ACPI_SLEEP
48 bool "Sleep States"
49 depends on X86 && (!SMP || SUSPEND_SMP) && !XEN
50 depends on PM
51 default y
52 ---help---
53 This option adds support for ACPI suspend states.
55 With this option, you will be able to put the system "to sleep".
56 Sleep states are low power states for the system and devices. All
57 of the system operating state is saved to either memory or disk
58 (depending on the state), to allow the system to resume operation
59 quickly at your request.
61 Although this option sounds really nifty, barely any of the device
62 drivers have been converted to the new driver model and hence few
63 have proper power management support.
65 This option is not recommended for anyone except those doing driver
66 power management development.
69 bool
70 depends on ACPI_SLEEP && PROC_FS
71 default y
74 bool "/proc/acpi/sleep (deprecated)"
75 depends on ACPI_SLEEP_PROC_FS
76 default n
77 ---help---
78 Create /proc/acpi/sleep
79 Deprecated by /sys/power/state
81 config ACPI_AC
82 tristate "AC Adapter"
83 depends on X86
84 default y
85 help
86 This driver adds support for the AC Adapter object, which indicates
87 whether a system is on AC, or not. If you have a system that can
88 switch between A/C and battery, say Y.
90 config ACPI_BATTERY
91 tristate "Battery"
92 depends on X86
93 default y
94 help
95 This driver adds support for battery information through
96 /proc/acpi/battery. If you have a mobile system with a battery,
97 say Y.
99 config ACPI_BUTTON
100 tristate "Button"
101 default y
102 help
103 This driver handles events on the power, sleep and lid buttons.
104 A daemon reads /proc/acpi/event and perform user-defined actions
105 such as shutting down the system. This is necessary for
106 software controlled poweroff.
108 config ACPI_VIDEO
109 tristate "Video"
110 depends on X86
111 default y
112 help
113 This driver implement the ACPI Extensions For Display Adapters
114 for integrated graphics devices on motherboard, as specified in
115 ACPI 2.0 Specification, Appendix B, allowing to perform some basic
116 control like defining the video POST device, retrieving EDID information
117 or to setup a video output, etc.
118 Note that this is an ref. implementation only. It may or may not work
119 for your integrated video device.
121 config ACPI_HOTKEY
122 tristate "Generic Hotkey (EXPERIMENTAL)"
123 depends on EXPERIMENTAL
124 depends on X86
125 default n
126 help
127 Experimental consolidated hotkey driver.
128 If you are unsure, say N.
130 config ACPI_FAN
131 tristate "Fan"
132 default y
133 help
134 This driver adds support for ACPI fan devices, allowing user-mode
135 applications to perform basic fan control (on, off, status).
138 tristate "Processor"
139 default y
140 help
141 This driver installs ACPI as the idle handler for Linux, and uses
142 ACPI C2 and C3 processor states to save power, on systems that
143 support it. It is required by several flavors of cpufreq
144 Performance-state drivers.
147 bool
150 default y
152 config ACPI_THERMAL
153 tristate "Thermal Zone"
154 depends on ACPI_PROCESSOR
155 default y
156 help
157 This driver adds support for ACPI thermal zones. Most mobile and
158 some desktop systems support ACPI thermal zones. It is HIGHLY
159 recommended that this option be enabled, as your processor(s)
160 may be damaged without it.
162 config ACPI_NUMA
163 bool "NUMA support"
164 depends on NUMA
165 depends on (IA64 || X86_64)
166 default y if IA64_GENERIC || IA64_SGI_SN2
168 config ACPI_ASUS
169 tristate "ASUS/Medion Laptop Extras"
170 depends on X86
171 ---help---
172 This driver provides support for extra features of ACPI-compatible
173 ASUS laptops. As some of Medion laptops are made by ASUS, it may also
174 support some Medion laptops (such as 9675 for example). It makes all
175 the extra buttons generate standard ACPI events that go through
176 /proc/acpi/events, and (on some models) adds support for changing the
177 display brightness and output, switching the LCD backlight on and off,
178 and most importantly, allows you to blink those fancy LEDs intended
179 for reporting mail and wireless status.
181 Note: display switching code is currently considered EXPERIMENTAL,
182 toying with these values may even lock your machine.
184 All settings are changed via /proc/acpi/asus directory entries. Owner
185 and group for these entries can be set with asus_uid and asus_gid
186 parameters.
188 More information and a userspace daemon for handling the extra buttons
189 at <>.
191 If you have an ACPI-compatible ASUS laptop, say Y or M here. This
192 driver is still under development, so if your laptop is unsupported or
193 something works not quite as expected, please use the mailing list
194 available on the above page (
196 config ACPI_IBM
197 tristate "IBM ThinkPad Laptop Extras"
198 depends on X86
199 ---help---
200 This is a Linux ACPI driver for the IBM ThinkPad laptops. It adds
201 support for Fn-Fx key combinations, Bluetooth control, video
202 output switching, ThinkLight control, UltraBay eject and more.
203 For more information about this driver see <file:Documentation/ibm-acpi.txt>
204 and <> .
206 If you have an IBM ThinkPad laptop, say Y or M here.
208 config ACPI_TOSHIBA
209 tristate "Toshiba Laptop Extras"
210 depends on X86
211 ---help---
212 This driver adds support for access to certain system settings
213 on "legacy free" Toshiba laptops. These laptops can be recognized by
214 their lack of a BIOS setup menu and APM support.
216 On these machines, all system configuration is handled through the
217 ACPI. This driver is required for access to controls not covered
218 by the general ACPI drivers, such as LCD brightness, video output,
219 etc.
221 This driver differs from the non-ACPI Toshiba laptop driver (located
222 under "Processor type and features") in several aspects.
223 Configuration is accessed by reading and writing text files in the
224 /proc tree instead of by program interface to /dev. Furthermore, no
225 power management functions are exposed, as those are handled by the
226 general ACPI drivers.
228 More information about this driver is available at
229 <>.
231 If you have a legacy free Toshiba laptop (such as the Libretto L1
232 series), say Y.
235 bool "Include Custom DSDT"
236 depends on !STANDALONE
237 default n
238 help
239 Thist option is to load a custom ACPI DSDT
240 If you don't know what that is, say N.
243 string "Custom DSDT Table file to include"
244 depends on ACPI_CUSTOM_DSDT
245 default ""
246 help
247 Enter the full path name to the file wich includes the AmlCode declaration.
250 int "Disable ACPI for systems before Jan 1st this year" if X86_32
251 default 0
252 help
253 enter a 4-digit year, eg. 2001 to disable ACPI by default
254 on platforms with DMI BIOS date before January 1st that year.
255 "acpi=force" can be used to override this mechanism.
257 Enter 0 to disable this mechanism and allow ACPI to
258 run by default no matter what the year. (default)
260 config ACPI_DEBUG
261 bool "Debug Statements"
262 default n
263 help
264 The ACPI driver can optionally report errors with a great deal
265 of verbosity. Saying Y enables these statements. This will increase
266 your kernel size by around 50K.
268 config ACPI_EC
269 bool
270 default y
271 help
272 This driver is required on some systems for the proper operation of
273 the battery and thermal drivers. If you are compiling for a
274 mobile system, say Y.
276 config ACPI_POWER
277 bool
278 default y
280 config ACPI_SYSTEM
281 bool
282 default y
283 help
284 This driver will enable your system to shut down using ACPI, and
285 dump your ACPI DSDT table using /proc/acpi/dsdt.
287 config X86_PM_TIMER
288 bool "Power Management Timer Support" if EMBEDDED
289 depends on X86
290 depends on !XEN
291 default y
292 help
293 The Power Management Timer is available on all ACPI-capable,
294 in most cases even if ACPI is unusable or blacklisted.
296 This timing source is not affected by powermanagement features
297 like aggressive processor idling, throttling, frequency and/or
298 voltage scaling, unlike the commonly used Time Stamp Counter
299 (TSC) timing source.
301 You should nearly always say Y here because many modern
302 systems require this timer.
305 tristate "ACPI0004,PNP0A05 and PNP0A06 Container Driver (EXPERIMENTAL)"
306 depends on EXPERIMENTAL
308 ---help---
309 This allows _physical_ insertion and removal of CPUs and memory.
310 This can be useful, for example, on NUMA machines that support
311 ACPI based physical hotplug of nodes, or non-NUMA machines that
312 support physical cpu/memory hot-plug.
314 If one selects "m", this driver can be loaded with
315 "modprobe acpi_container".
318 tristate "Memory Hotplug"
319 depends on ACPI
320 depends on MEMORY_HOTPLUG
321 default n
322 help
323 This driver adds supports for ACPI Memory Hotplug. This driver
324 provides support for fielding notifications on ACPI memory
325 devices (PNP0C80) which represent memory ranges that may be
326 onlined or offlined during runtime.
328 Enabling this driver assumes that your platform hardware
329 and firmware have support for hot-plugging physical memory. If
330 your system does not support physically adding or ripping out
331 memory DIMMs at some platfrom defined granularity (individually
332 or as a bank) at runtime, then you need not enable this driver.
334 If one selects "m," this driver can be loaded using the following
335 command:
336 $>modprobe acpi_memhotplug
337 endif # ACPI
339 endmenu