blob: 659879a56dbac59c7f18e0d2f51393bf9a3e645f [file] [log] [blame]
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"
Pranith Kumar83fe27e2014-12-05 11:24:45 -05005 select SRCU
Linus Torvalds1da177e2005-04-16 15:20:36 -07006 help
7 CPU Frequency scaling allows you to change the clock speed of
8 CPUs on the fly. This is a nice method to save power, because
9 the lower the CPU clock speed, the less power the CPU consumes.
10
11 Note that this driver doesn't automatically change the CPU
12 clock speed, you need to either enable a dynamic cpufreq governor
13 (see below) after boot, or use a userspace tool.
14
15 For details, take a look at <file:Documentation/cpu-freq>.
16
17 If in doubt, say N.
18
19if CPU_FREQ
20
Larry Finger1e15f292012-12-29 01:55:20 +000021config CPU_FREQ_GOV_COMMON
22 bool
23
Lukasz Majewski2fb47192013-12-20 15:24:51 +010024config CPU_FREQ_BOOST_SW
25 bool
26 depends on THERMAL
27
Linus Torvalds1da177e2005-04-16 15:20:36 -070028config CPU_FREQ_STAT
Mike Frysinger9101be52007-04-18 16:18:13 -040029 tristate "CPU frequency translation statistics"
Mike Frysinger9101be52007-04-18 16:18:13 -040030 default y
31 help
32 This driver exports CPU frequency statistics information through sysfs
33 file system.
34
35 To compile this driver as a module, choose M here: the
36 module will be called cpufreq_stats.
37
38 If in doubt, say N.
Linus Torvalds1da177e2005-04-16 15:20:36 -070039
40config CPU_FREQ_STAT_DETAILS
Mike Frysinger9101be52007-04-18 16:18:13 -040041 bool "CPU frequency translation statistics details"
42 depends on CPU_FREQ_STAT
43 help
44 This will show detail CPU frequency translation table in sysfs file
45 system.
46
47 If in doubt, say N.
Linus Torvalds1da177e2005-04-16 15:20:36 -070048
Linus Torvalds1da177e2005-04-16 15:20:36 -070049choice
50 prompt "Default CPUFreq governor"
Alexander Shiyan559f56c2013-05-05 12:18:08 +000051 default CPU_FREQ_DEFAULT_GOV_USERSPACE if ARM_SA1100_CPUFREQ || ARM_SA1110_CPUFREQ
Linus Torvalds1da177e2005-04-16 15:20:36 -070052 default CPU_FREQ_DEFAULT_GOV_PERFORMANCE
53 help
54 This option sets which CPUFreq governor shall be loaded at
55 startup. If in doubt, select 'performance'.
56
57config CPU_FREQ_DEFAULT_GOV_PERFORMANCE
58 bool "performance"
59 select CPU_FREQ_GOV_PERFORMANCE
60 help
61 Use the CPUFreq governor 'performance' as default. This sets
62 the frequency statically to the highest frequency supported by
63 the CPU.
64
Alessandro Guido30d221d2008-04-18 13:31:13 -070065config CPU_FREQ_DEFAULT_GOV_POWERSAVE
66 bool "powersave"
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 Kumarf41f4812014-11-15 08:50:44 +0530186comment "CPU frequency scaling drivers"
187
Viresh Kumarbbcf0712014-09-09 19:58:03 +0530188config CPUFREQ_DT
189 tristate "Generic DT based cpufreq driver"
Viresh Kumar5fbfbcd2014-06-10 10:39:46 +0530190 depends on HAVE_CLK && OF
Viresh Kumarbbcf0712014-09-09 19:58:03 +0530191 # if CPU_THERMAL is on and THERMAL=m, CPUFREQ_DT cannot be =y:
Arnd Bergmann217886d2014-06-13 10:40:32 +0200192 depends on !CPU_THERMAL || THERMAL
Mark Brown109df082013-12-11 22:12:27 +0000193 select PM_OPP
Shawn Guo95ceafd2012-09-06 07:09:11 +0000194 help
Viresh Kumarbbcf0712014-09-09 19:58:03 +0530195 This adds a generic DT based cpufreq driver for frequency management.
Shawn Guo95ceafd2012-09-06 07:09:11 +0000196 It supports both uniprocessor (UP) and symmetric multiprocessor (SMP)
197 systems which share clock and voltage across all CPUs.
198
199 If in doubt, say N.
200
Viresh Kumarf41f4812014-11-15 08:50:44 +0530201if X86
Dave Jonesbb0a56e2011-05-19 18:51:07 -0400202source "drivers/cpufreq/Kconfig.x86"
Viresh Kumarf41f4812014-11-15 08:50:44 +0530203endif
Dave Jonesbb0a56e2011-05-19 18:51:07 -0400204
Viresh Kumarf41f4812014-11-15 08:50:44 +0530205if ARM || ARM64
Kukjin Kimf7d77072011-06-01 14:18:22 -0700206source "drivers/cpufreq/Kconfig.arm"
Viresh Kumarf41f4812014-11-15 08:50:44 +0530207endif
Kukjin Kimf7d77072011-06-01 14:18:22 -0700208
Viresh Kumarf41f4812014-11-15 08:50:44 +0530209if PPC32 || PPC64
210source "drivers/cpufreq/Kconfig.powerpc"
211endif
Viresh Kumar81c720c2013-04-04 12:54:17 +0000212
Viresh Kumarf41f4812014-11-15 08:50:44 +0530213if AVR32
Viresh Kumar81c720c2013-04-04 12:54:17 +0000214config AVR32_AT32AP_CPUFREQ
215 bool "CPU frequency driver for AT32AP"
216 depends on PLATFORM_AT32AP
217 default n
218 help
219 This enables the CPU frequency driver for AT32AP processors.
220 If in doubt, say N.
Viresh Kumarf41f4812014-11-15 08:50:44 +0530221endif
Viresh Kumar81c720c2013-04-04 12:54:17 +0000222
Viresh Kumarf41f4812014-11-15 08:50:44 +0530223if IA64
Viresh Kumarab423e42013-04-04 12:54:20 +0000224config IA64_ACPI_CPUFREQ
225 tristate "ACPI Processor P-States driver"
Viresh Kumarab423e42013-04-04 12:54:20 +0000226 depends on ACPI_PROCESSOR
227 help
228 This driver adds a CPUFreq driver which utilizes the ACPI
229 Processor Performance States.
230
231 For details, take a look at <file:Documentation/cpu-freq/>.
232
233 If in doubt, say N.
Viresh Kumarf41f4812014-11-15 08:50:44 +0530234endif
Viresh Kumarab423e42013-04-04 12:54:20 +0000235
Viresh Kumarf41f4812014-11-15 08:50:44 +0530236if MIPS
Viresh Kumar7a998932013-04-04 12:54:21 +0000237config LOONGSON2_CPUFREQ
238 tristate "Loongson2 CPUFreq Driver"
Viresh Kumar7a998932013-04-04 12:54:21 +0000239 help
240 This option adds a CPUFreq driver for loongson processors which
241 support software configurable cpu frequency.
242
243 Loongson2F and it's successors support this feature.
244
245 For details, take a look at <file:Documentation/cpu-freq/>.
246
247 If in doubt, say N.
248
Kelvin Cheunga0a22cf2014-10-17 18:23:31 +0800249config LOONGSON1_CPUFREQ
250 tristate "Loongson1 CPUFreq Driver"
251 help
252 This option adds a CPUFreq driver for loongson1 processors which
253 support software configurable cpu frequency.
254
255 For details, take a look at <file:Documentation/cpu-freq/>.
256
257 If in doubt, say N.
Viresh Kumarf41f4812014-11-15 08:50:44 +0530258endif
Kelvin Cheunga0a22cf2014-10-17 18:23:31 +0800259
Viresh Kumarf41f4812014-11-15 08:50:44 +0530260if SPARC64
Viresh Kumar764295a2013-04-04 12:54:24 +0000261config SPARC_US3_CPUFREQ
262 tristate "UltraSPARC-III CPU Frequency driver"
Viresh Kumar764295a2013-04-04 12:54:24 +0000263 help
264 This adds the CPUFreq driver for UltraSPARC-III processors.
265
266 For details, take a look at <file:Documentation/cpu-freq>.
267
268 If in doubt, say N.
269
270config SPARC_US2E_CPUFREQ
271 tristate "UltraSPARC-IIe CPU Frequency driver"
Viresh Kumar764295a2013-04-04 12:54:24 +0000272 help
273 This adds the CPUFreq driver for UltraSPARC-IIe processors.
274
275 For details, take a look at <file:Documentation/cpu-freq>.
276
277 If in doubt, say N.
Viresh Kumarf41f4812014-11-15 08:50:44 +0530278endif
Viresh Kumar764295a2013-04-04 12:54:24 +0000279
Viresh Kumarf41f4812014-11-15 08:50:44 +0530280if SUPERH
Viresh Kumar72582672013-04-04 12:54:22 +0000281config SH_CPU_FREQ
282 tristate "SuperH CPU Frequency driver"
Viresh Kumar72582672013-04-04 12:54:22 +0000283 help
284 This adds the cpufreq driver for SuperH. Any CPU that supports
285 clock rate rounding through the clock framework can use this
286 driver. While it will make the kernel slightly larger, this is
287 harmless for CPUs that don't support rate rounding. The driver
288 will also generate a notice in the boot log before disabling
289 itself if the CPU in question is not capable of rate rounding.
290
291 For details, take a look at <file:Documentation/cpu-freq>.
292
293 If unsure, say N.
Viresh Kumarf41f4812014-11-15 08:50:44 +0530294endif
Viresh Kumar72582672013-04-04 12:54:22 +0000295
Tang Yuantian2f249352015-03-13 12:39:02 +0800296config QORIQ_CPUFREQ
297 tristate "CPU frequency scaling driver for Freescale QorIQ SoCs"
298 depends on OF && COMMON_CLK && (PPC_E500MC || ARM)
299 select CLK_QORIQ
300 help
301 This adds the CPUFreq driver support for Freescale QorIQ SoCs
302 which are capable of changing the CPU's frequency dynamically.
303
Dave Jonesbb0a56e2011-05-19 18:51:07 -0400304endif
305endmenu