aboutsummaryrefslogtreecommitdiffstats
path: root/kernel/power/Kconfig
diff options
context:
space:
mode:
Diffstat (limited to 'kernel/power/Kconfig')
-rw-r--r--kernel/power/Kconfig237
1 files changed, 102 insertions, 135 deletions
diff --git a/kernel/power/Kconfig b/kernel/power/Kconfig
index 265729966ece..4603f08dc47b 100644
--- a/kernel/power/Kconfig
+++ b/kernel/power/Kconfig
@@ -1,125 +1,12 @@
1config PM
2 bool "Power Management support"
3 depends on !IA64_HP_SIM
4 ---help---
5 "Power Management" means that parts of your computer are shut
6 off or put into a power conserving "sleep" mode if they are not
7 being used. There are two competing standards for doing this: APM
8 and ACPI. If you want to use either one, say Y here and then also
9 to the requisite support below.
10
11 Power Management is most important for battery powered laptop
12 computers; if you have a laptop, check out the Linux Laptop home
13 page on the WWW at <http://www.linux-on-laptops.com/> or
14 Tuxmobil - Linux on Mobile Computers at <http://www.tuxmobil.org/>
15 and the Battery Powered Linux mini-HOWTO, available from
16 <http://www.tldp.org/docs.html#howto>.
17
18 Note that, even if you say N here, Linux on the x86 architecture
19 will issue the hlt instruction if nothing is to be done, thereby
20 sending the processor to sleep and saving power.
21
22config PM_DEBUG
23 bool "Power Management Debug Support"
24 depends on PM
25 ---help---
26 This option enables various debugging support in the Power Management
27 code. This is helpful when debugging and reporting PM bugs, like
28 suspend support.
29
30config PM_ADVANCED_DEBUG
31 bool "Extra PM attributes in sysfs for low-level debugging/testing"
32 depends on PM_DEBUG
33 default n
34 ---help---
35 Add extra sysfs attributes allowing one to access some Power Management
36 fields of device objects from user space. If you are not a kernel
37 developer interested in debugging/testing Power Management, say "no".
38
39config PM_VERBOSE
40 bool "Verbose Power Management debugging"
41 depends on PM_DEBUG
42 default n
43 ---help---
44 This option enables verbose messages from the Power Management code.
45
46config CAN_PM_TRACE
47 def_bool y
48 depends on PM_DEBUG && PM_SLEEP && EXPERIMENTAL
49
50config PM_TRACE
51 bool
52 help
53 This enables code to save the last PM event point across
54 reboot. The architecture needs to support this, x86 for
55 example does by saving things in the RTC, see below.
56
57 The architecture specific code must provide the extern
58 functions from <linux/resume-trace.h> as well as the
59 <asm/resume-trace.h> header with a TRACE_RESUME() macro.
60
61 The way the information is presented is architecture-
62 dependent, x86 will print the information during a
63 late_initcall.
64
65config PM_TRACE_RTC
66 bool "Suspend/resume event tracing"
67 depends on CAN_PM_TRACE
68 depends on X86
69 select PM_TRACE
70 default n
71 ---help---
72 This enables some cheesy code to save the last PM event point in the
73 RTC across reboots, so that you can debug a machine that just hangs
74 during suspend (or more commonly, during resume).
75
76 To use this debugging feature you should attempt to suspend the
77 machine, reboot it and then run
78
79 dmesg -s 1000000 | grep 'hash matches'
80
81 CAUTION: this option will cause your machine's real-time clock to be
82 set to an invalid time after a resume.
83
84config PM_SLEEP_SMP
85 bool
86 depends on SMP
87 depends on ARCH_SUSPEND_POSSIBLE || ARCH_HIBERNATION_POSSIBLE
88 depends on PM_SLEEP
89 select HOTPLUG
90 select HOTPLUG_CPU
91 default y
92
93config PM_SLEEP
94 bool
95 depends on SUSPEND || HIBERNATION || XEN_SAVE_RESTORE
96 default y
97
98config PM_SLEEP_ADVANCED_DEBUG
99 bool
100 depends on PM_ADVANCED_DEBUG
101 default n
102
103config SUSPEND 1config SUSPEND
104 bool "Suspend to RAM and standby" 2 bool "Suspend to RAM and standby"
105 depends on PM && ARCH_SUSPEND_POSSIBLE 3 depends on ARCH_SUSPEND_POSSIBLE
106 default y 4 default y
107 ---help--- 5 ---help---
108 Allow the system to enter sleep states in which main memory is 6 Allow the system to enter sleep states in which main memory is
109 powered and thus its contents are preserved, such as the 7 powered and thus its contents are preserved, such as the
110 suspend-to-RAM state (e.g. the ACPI S3 state). 8 suspend-to-RAM state (e.g. the ACPI S3 state).
111 9
112config PM_TEST_SUSPEND
113 bool "Test suspend/resume and wakealarm during bootup"
114 depends on SUSPEND && PM_DEBUG && RTC_CLASS=y
115 ---help---
116 This option will let you suspend your machine during bootup, and
117 make it wake up a few seconds later using an RTC wakeup alarm.
118 Enable this with a kernel parameter like "test_suspend=mem".
119
120 You probably want to have your system's RTC driver statically
121 linked, ensuring that it's available when this test runs.
122
123config SUSPEND_FREEZER 10config SUSPEND_FREEZER
124 bool "Enable freezer for suspend to RAM/standby" \ 11 bool "Enable freezer for suspend to RAM/standby" \
125 if ARCH_WANTS_FREEZER_CONTROL || BROKEN 12 if ARCH_WANTS_FREEZER_CONTROL || BROKEN
@@ -133,7 +20,7 @@ config SUSPEND_FREEZER
133 20
134config HIBERNATION 21config HIBERNATION
135 bool "Hibernation (aka 'suspend to disk')" 22 bool "Hibernation (aka 'suspend to disk')"
136 depends on PM && SWAP && ARCH_HIBERNATION_POSSIBLE 23 depends on SWAP && ARCH_HIBERNATION_POSSIBLE
137 select LZO_COMPRESS 24 select LZO_COMPRESS
138 select LZO_DECOMPRESS 25 select LZO_DECOMPRESS
139 ---help--- 26 ---help---
@@ -196,6 +83,106 @@ config PM_STD_PARTITION
196 suspended image to. It will simply pick the first available swap 83 suspended image to. It will simply pick the first available swap
197 device. 84 device.
198 85
86config PM_SLEEP
87 def_bool y
88 depends on SUSPEND || HIBERNATION || XEN_SAVE_RESTORE
89
90config PM_SLEEP_SMP
91 def_bool y
92 depends on SMP
93 depends on ARCH_SUSPEND_POSSIBLE || ARCH_HIBERNATION_POSSIBLE
94 depends on PM_SLEEP
95 select HOTPLUG
96 select HOTPLUG_CPU
97
98config PM_RUNTIME
99 bool "Run-time PM core functionality"
100 depends on !IA64_HP_SIM
101 ---help---
102 Enable functionality allowing I/O devices to be put into energy-saving
103 (low power) states at run time (or autosuspended) after a specified
104 period of inactivity and woken up in response to a hardware-generated
105 wake-up event or a driver's request.
106
107 Hardware support is generally required for this functionality to work
108 and the bus type drivers of the buses the devices are on are
109 responsible for the actual handling of the autosuspend requests and
110 wake-up events.
111
112config PM
113 def_bool y
114 depends on PM_SLEEP || PM_RUNTIME
115
116config PM_DEBUG
117 bool "Power Management Debug Support"
118 depends on PM
119 ---help---
120 This option enables various debugging support in the Power Management
121 code. This is helpful when debugging and reporting PM bugs, like
122 suspend support.
123
124config PM_VERBOSE
125 bool "Verbose Power Management debugging"
126 depends on PM_DEBUG
127 ---help---
128 This option enables verbose messages from the Power Management code.
129
130config PM_ADVANCED_DEBUG
131 bool "Extra PM attributes in sysfs for low-level debugging/testing"
132 depends on PM_DEBUG
133 ---help---
134 Add extra sysfs attributes allowing one to access some Power Management
135 fields of device objects from user space. If you are not a kernel
136 developer interested in debugging/testing Power Management, say "no".
137
138config PM_TEST_SUSPEND
139 bool "Test suspend/resume and wakealarm during bootup"
140 depends on SUSPEND && PM_DEBUG && RTC_CLASS=y
141 ---help---
142 This option will let you suspend your machine during bootup, and
143 make it wake up a few seconds later using an RTC wakeup alarm.
144 Enable this with a kernel parameter like "test_suspend=mem".
145
146 You probably want to have your system's RTC driver statically
147 linked, ensuring that it's available when this test runs.
148
149config CAN_PM_TRACE
150 def_bool y
151 depends on PM_DEBUG && PM_SLEEP
152
153config PM_TRACE
154 bool
155 help
156 This enables code to save the last PM event point across
157 reboot. The architecture needs to support this, x86 for
158 example does by saving things in the RTC, see below.
159
160 The architecture specific code must provide the extern
161 functions from <linux/resume-trace.h> as well as the
162 <asm/resume-trace.h> header with a TRACE_RESUME() macro.
163
164 The way the information is presented is architecture-
165 dependent, x86 will print the information during a
166 late_initcall.
167
168config PM_TRACE_RTC
169 bool "Suspend/resume event tracing"
170 depends on CAN_PM_TRACE
171 depends on X86
172 select PM_TRACE
173 ---help---
174 This enables some cheesy code to save the last PM event point in the
175 RTC across reboots, so that you can debug a machine that just hangs
176 during suspend (or more commonly, during resume).
177
178 To use this debugging feature you should attempt to suspend the
179 machine, reboot it and then run
180
181 dmesg -s 1000000 | grep 'hash matches'
182
183 CAUTION: this option will cause your machine's real-time clock to be
184 set to an invalid time after a resume.
185
199config APM_EMULATION 186config APM_EMULATION
200 tristate "Advanced Power Management Emulation" 187 tristate "Advanced Power Management Emulation"
201 depends on PM && SYS_SUPPORTS_APM_EMULATION 188 depends on PM && SYS_SUPPORTS_APM_EMULATION
@@ -222,31 +209,11 @@ config APM_EMULATION
222 anything, try disabling/enabling this option (or disabling/enabling 209 anything, try disabling/enabling this option (or disabling/enabling
223 APM in your BIOS). 210 APM in your BIOS).
224 211
225config PM_RUNTIME
226 bool "Run-time PM core functionality"
227 depends on PM
228 ---help---
229 Enable functionality allowing I/O devices to be put into energy-saving
230 (low power) states at run time (or autosuspended) after a specified
231 period of inactivity and woken up in response to a hardware-generated
232 wake-up event or a driver's request.
233
234 Hardware support is generally required for this functionality to work
235 and the bus type drivers of the buses the devices are on are
236 responsible for the actual handling of the autosuspend requests and
237 wake-up events.
238
239config PM_OPS
240 bool
241 depends on PM_SLEEP || PM_RUNTIME
242 default y
243
244config ARCH_HAS_OPP 212config ARCH_HAS_OPP
245 bool 213 bool
246 214
247config PM_OPP 215config PM_OPP
248 bool "Operating Performance Point (OPP) Layer library" 216 bool "Operating Performance Point (OPP) Layer library"
249 depends on PM
250 depends on ARCH_HAS_OPP 217 depends on ARCH_HAS_OPP
251 ---help--- 218 ---help---
252 SOCs have a standard set of tuples consisting of frequency and 219 SOCs have a standard set of tuples consisting of frequency and