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Dave Jonesbb0a56e2011-05-19 18:51:07 -04001menu "CPU Frequency scaling"
2
Linus Torvalds1da177e2005-04-16 15:20:36 -07003config CPU_FREQ
4 bool "CPU Frequency scaling"
5 help
6 CPU Frequency scaling allows you to change the clock speed of
7 CPUs on the fly. This is a nice method to save power, because
8 the lower the CPU clock speed, the less power the CPU consumes.
9
10 Note that this driver doesn't automatically change the CPU
11 clock speed, you need to either enable a dynamic cpufreq governor
12 (see below) after boot, or use a userspace tool.
13
14 For details, take a look at <file:Documentation/cpu-freq>.
15
16 If in doubt, say N.
17
18if CPU_FREQ
19
Larry Finger1e15f292012-12-29 01:55:20 +000020config CPU_FREQ_GOV_COMMON
21 bool
22
Lukasz Majewski2fb47192013-12-20 15:24:51 +010023config CPU_FREQ_BOOST_SW
24 bool
25 depends on THERMAL
26
Linus Torvalds1da177e2005-04-16 15:20:36 -070027config CPU_FREQ_STAT
Mike Frysinger9101be52007-04-18 16:18:13 -040028 tristate "CPU frequency translation statistics"
Mike Frysinger9101be52007-04-18 16:18:13 -040029 default y
30 help
31 This driver exports CPU frequency statistics information through sysfs
32 file system.
33
34 To compile this driver as a module, choose M here: the
35 module will be called cpufreq_stats.
36
37 If in doubt, say N.
Linus Torvalds1da177e2005-04-16 15:20:36 -070038
39config CPU_FREQ_STAT_DETAILS
Mike Frysinger9101be52007-04-18 16:18:13 -040040 bool "CPU frequency translation statistics details"
41 depends on CPU_FREQ_STAT
42 help
43 This will show detail CPU frequency translation table in sysfs file
44 system.
45
46 If in doubt, say N.
Linus Torvalds1da177e2005-04-16 15:20:36 -070047
Linus Torvalds1da177e2005-04-16 15:20:36 -070048choice
49 prompt "Default CPUFreq governor"
Alexander Shiyan559f56c2013-05-05 12:18:08 +000050 default CPU_FREQ_DEFAULT_GOV_USERSPACE if ARM_SA1100_CPUFREQ || ARM_SA1110_CPUFREQ
Linus Torvalds1da177e2005-04-16 15:20:36 -070051 default CPU_FREQ_DEFAULT_GOV_PERFORMANCE
52 help
53 This option sets which CPUFreq governor shall be loaded at
54 startup. If in doubt, select 'performance'.
55
56config CPU_FREQ_DEFAULT_GOV_PERFORMANCE
57 bool "performance"
58 select CPU_FREQ_GOV_PERFORMANCE
59 help
60 Use the CPUFreq governor 'performance' as default. This sets
61 the frequency statically to the highest frequency supported by
62 the CPU.
63
Alessandro Guido30d221d2008-04-18 13:31:13 -070064config CPU_FREQ_DEFAULT_GOV_POWERSAVE
65 bool "powersave"
David Rientjes6a108a12011-01-20 14:44:16 -080066 depends on EXPERT
Alessandro Guido30d221d2008-04-18 13:31:13 -070067 select CPU_FREQ_GOV_POWERSAVE
68 help
69 Use the CPUFreq governor 'powersave' as default. This sets
70 the frequency statically to the lowest frequency supported by
71 the CPU.
72
Linus Torvalds1da177e2005-04-16 15:20:36 -070073config CPU_FREQ_DEFAULT_GOV_USERSPACE
74 bool "userspace"
75 select CPU_FREQ_GOV_USERSPACE
76 help
77 Use the CPUFreq governor 'userspace' as default. This allows
Frederik Schwarzer0211a9c2008-12-29 22:14:56 +010078 you to set the CPU frequency manually or when a userspace
Linus Torvalds1da177e2005-04-16 15:20:36 -070079 program shall be able to set the CPU dynamically without having
80 to enable the userspace governor manually.
81
Thomas Renninger1c256242007-10-02 13:28:12 -070082config CPU_FREQ_DEFAULT_GOV_ONDEMAND
83 bool "ondemand"
84 select CPU_FREQ_GOV_ONDEMAND
85 select CPU_FREQ_GOV_PERFORMANCE
86 help
87 Use the CPUFreq governor 'ondemand' as default. This allows
88 you to get a full dynamic frequency capable system by simply
89 loading your cpufreq low-level hardware driver.
90 Be aware that not all cpufreq drivers support the ondemand
91 governor. If unsure have a look at the help section of the
92 driver. Fallback governor will be the performance governor.
93
94config CPU_FREQ_DEFAULT_GOV_CONSERVATIVE
95 bool "conservative"
96 select CPU_FREQ_GOV_CONSERVATIVE
97 select CPU_FREQ_GOV_PERFORMANCE
98 help
99 Use the CPUFreq governor 'conservative' as default. This allows
100 you to get a full dynamic frequency capable system by simply
101 loading your cpufreq low-level hardware driver.
102 Be aware that not all cpufreq drivers support the conservative
103 governor. If unsure have a look at the help section of the
104 driver. Fallback governor will be the performance governor.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105endchoice
106
107config CPU_FREQ_GOV_PERFORMANCE
Mike Frysinger9101be52007-04-18 16:18:13 -0400108 tristate "'performance' governor"
109 help
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110 This cpufreq governor sets the frequency statically to the
111 highest available CPU frequency.
112
Mike Frysinger9101be52007-04-18 16:18:13 -0400113 To compile this driver as a module, choose M here: the
114 module will be called cpufreq_performance.
115
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116 If in doubt, say Y.
117
118config CPU_FREQ_GOV_POWERSAVE
Mike Frysinger9101be52007-04-18 16:18:13 -0400119 tristate "'powersave' governor"
120 help
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121 This cpufreq governor sets the frequency statically to the
122 lowest available CPU frequency.
123
Mike Frysinger9101be52007-04-18 16:18:13 -0400124 To compile this driver as a module, choose M here: the
125 module will be called cpufreq_powersave.
126
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127 If in doubt, say Y.
128
129config CPU_FREQ_GOV_USERSPACE
Mike Frysinger9101be52007-04-18 16:18:13 -0400130 tristate "'userspace' governor for userspace frequency scaling"
131 help
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132 Enable this cpufreq governor when you either want to set the
Frederik Schwarzer0211a9c2008-12-29 22:14:56 +0100133 CPU frequency manually or when a userspace program shall
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134 be able to set the CPU dynamically, like on LART
Erik Mouw4c412512006-04-03 14:21:00 +0200135 <http://www.lartmaker.nl/>.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136
Mike Frysinger9101be52007-04-18 16:18:13 -0400137 To compile this driver as a module, choose M here: the
138 module will be called cpufreq_userspace.
139
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140 For details, take a look at <file:Documentation/cpu-freq/>.
141
142 If in doubt, say Y.
143
144config CPU_FREQ_GOV_ONDEMAND
145 tristate "'ondemand' cpufreq policy governor"
Larry Finger1e15f292012-12-29 01:55:20 +0000146 select CPU_FREQ_GOV_COMMON
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147 help
148 'ondemand' - This driver adds a dynamic cpufreq policy governor.
149 The governor does a periodic polling and
150 changes frequency based on the CPU utilization.
151 The support for this governor depends on CPU capability to
152 do fast frequency switching (i.e, very low latency frequency
153 transitions).
154
Mike Frysinger9101be52007-04-18 16:18:13 -0400155 To compile this driver as a module, choose M here: the
156 module will be called cpufreq_ondemand.
157
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158 For details, take a look at linux/Documentation/cpu-freq.
159
160 If in doubt, say N.
161
Dave Jonesb9170832005-05-31 19:03:47 -0700162config CPU_FREQ_GOV_CONSERVATIVE
163 tristate "'conservative' cpufreq governor"
164 depends on CPU_FREQ
Larry Finger1e15f292012-12-29 01:55:20 +0000165 select CPU_FREQ_GOV_COMMON
Dave Jonesb9170832005-05-31 19:03:47 -0700166 help
167 'conservative' - this driver is rather similar to the 'ondemand'
168 governor both in its source code and its purpose, the difference is
169 its optimisation for better suitability in a battery powered
170 environment. The frequency is gracefully increased and decreased
171 rather than jumping to 100% when speed is required.
172
173 If you have a desktop machine then you should really be considering
174 the 'ondemand' governor instead, however if you are using a laptop,
175 PDA or even an AMD64 based computer (due to the unacceptable
176 step-by-step latency issues between the minimum and maximum frequency
177 transitions in the CPU) you will probably want to use this governor.
178
Mike Frysinger9101be52007-04-18 16:18:13 -0400179 To compile this driver as a module, choose M here: the
180 module will be called cpufreq_conservative.
181
Dave Jonesb9170832005-05-31 19:03:47 -0700182 For details, take a look at linux/Documentation/cpu-freq.
183
184 If in doubt, say N.
185
Viresh Kumarbbcf0712014-09-09 19:58:03 +0530186config CPUFREQ_DT
187 tristate "Generic DT based cpufreq driver"
Viresh Kumar5fbfbcd2014-06-10 10:39:46 +0530188 depends on HAVE_CLK && OF
Viresh Kumarbbcf0712014-09-09 19:58:03 +0530189 # if CPU_THERMAL is on and THERMAL=m, CPUFREQ_DT cannot be =y:
Arnd Bergmann217886d2014-06-13 10:40:32 +0200190 depends on !CPU_THERMAL || THERMAL
Mark Brown109df082013-12-11 22:12:27 +0000191 select PM_OPP
Shawn Guo95ceafd2012-09-06 07:09:11 +0000192 help
Viresh Kumarbbcf0712014-09-09 19:58:03 +0530193 This adds a generic DT based cpufreq driver for frequency management.
Shawn Guo95ceafd2012-09-06 07:09:11 +0000194 It supports both uniprocessor (UP) and symmetric multiprocessor (SMP)
195 systems which share clock and voltage across all CPUs.
196
197 If in doubt, say N.
198
Dave Jonesbb0a56e2011-05-19 18:51:07 -0400199menu "x86 CPU frequency scaling drivers"
200depends on X86
201source "drivers/cpufreq/Kconfig.x86"
202endmenu
203
Kukjin Kimf7d77072011-06-01 14:18:22 -0700204menu "ARM CPU frequency scaling drivers"
Rob Herringaddea9e2014-02-24 02:27:57 +0000205depends on ARM || ARM64
Kukjin Kimf7d77072011-06-01 14:18:22 -0700206source "drivers/cpufreq/Kconfig.arm"
207endmenu
208
Viresh Kumar81c720c2013-04-04 12:54:17 +0000209menu "AVR32 CPU frequency scaling drivers"
210depends on AVR32
211
212config AVR32_AT32AP_CPUFREQ
213 bool "CPU frequency driver for AT32AP"
214 depends on PLATFORM_AT32AP
215 default n
216 help
217 This enables the CPU frequency driver for AT32AP processors.
218 If in doubt, say N.
219
220endmenu
221
Viresh Kumarab423e42013-04-04 12:54:20 +0000222menu "CPUFreq processor drivers"
223depends on IA64
224
225config IA64_ACPI_CPUFREQ
226 tristate "ACPI Processor P-States driver"
Viresh Kumarab423e42013-04-04 12:54:20 +0000227 depends on ACPI_PROCESSOR
228 help
229 This driver adds a CPUFreq driver which utilizes the ACPI
230 Processor Performance States.
231
232 For details, take a look at <file:Documentation/cpu-freq/>.
233
234 If in doubt, say N.
235
236endmenu
237
Viresh Kumar7a998932013-04-04 12:54:21 +0000238menu "MIPS CPUFreq processor drivers"
239depends on MIPS
240
241config LOONGSON2_CPUFREQ
242 tristate "Loongson2 CPUFreq Driver"
Viresh Kumar7a998932013-04-04 12:54:21 +0000243 help
244 This option adds a CPUFreq driver for loongson processors which
245 support software configurable cpu frequency.
246
247 Loongson2F and it's successors support this feature.
248
249 For details, take a look at <file:Documentation/cpu-freq/>.
250
251 If in doubt, say N.
252
253endmenu
254
Dmitry Eremin-Solenikov5d8c6652011-06-29 05:07:56 +0000255menu "PowerPC CPU frequency scaling drivers"
256depends on PPC32 || PPC64
257source "drivers/cpufreq/Kconfig.powerpc"
258endmenu
259
Viresh Kumar764295a2013-04-04 12:54:24 +0000260menu "SPARC CPU frequency scaling drivers"
261depends on SPARC64
262config SPARC_US3_CPUFREQ
263 tristate "UltraSPARC-III CPU Frequency driver"
Viresh Kumar764295a2013-04-04 12:54:24 +0000264 help
265 This adds the CPUFreq driver for UltraSPARC-III processors.
266
267 For details, take a look at <file:Documentation/cpu-freq>.
268
269 If in doubt, say N.
270
271config SPARC_US2E_CPUFREQ
272 tristate "UltraSPARC-IIe CPU Frequency driver"
Viresh Kumar764295a2013-04-04 12:54:24 +0000273 help
274 This adds the CPUFreq driver for UltraSPARC-IIe processors.
275
276 For details, take a look at <file:Documentation/cpu-freq>.
277
278 If in doubt, say N.
279endmenu
280
Viresh Kumar72582672013-04-04 12:54:22 +0000281menu "SH CPU Frequency scaling"
282depends on SUPERH
283config SH_CPU_FREQ
284 tristate "SuperH CPU Frequency driver"
Viresh Kumar72582672013-04-04 12:54:22 +0000285 help
286 This adds the cpufreq driver for SuperH. Any CPU that supports
287 clock rate rounding through the clock framework can use this
288 driver. While it will make the kernel slightly larger, this is
289 harmless for CPUs that don't support rate rounding. The driver
290 will also generate a notice in the boot log before disabling
291 itself if the CPU in question is not capable of rate rounding.
292
293 For details, take a look at <file:Documentation/cpu-freq>.
294
295 If unsure, say N.
296endmenu
297
Dave Jonesbb0a56e2011-05-19 18:51:07 -0400298endif
299endmenu