2019-05-19 20:07:45 +08:00
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# SPDX-License-Identifier: GPL-2.0-only
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2011-05-20 06:51:07 +08:00
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menu "CPU Frequency scaling"
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2005-04-17 06:20:36 +08:00
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config CPU_FREQ
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bool "CPU Frequency scaling"
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2014-12-06 00:24:45 +08:00
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select SRCU
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2005-04-17 06:20:36 +08:00
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help
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CPU Frequency scaling allows you to change the clock speed of
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CPUs on the fly. This is a nice method to save power, because
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the lower the CPU clock speed, the less power the CPU consumes.
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Note that this driver doesn't automatically change the CPU
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clock speed, you need to either enable a dynamic cpufreq governor
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(see below) after boot, or use a userspace tool.
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For details, take a look at <file:Documentation/cpu-freq>.
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If in doubt, say N.
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if CPU_FREQ
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2016-03-22 09:49:15 +08:00
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config CPU_FREQ_GOV_ATTR_SET
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bool
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2012-12-29 09:55:20 +08:00
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config CPU_FREQ_GOV_COMMON
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2016-03-22 09:49:15 +08:00
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select CPU_FREQ_GOV_ATTR_SET
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2016-02-28 09:33:29 +08:00
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select IRQ_WORK
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2012-12-29 09:55:20 +08:00
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bool
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2005-04-17 06:20:36 +08:00
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config CPU_FREQ_STAT
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2016-06-01 04:14:44 +08:00
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bool "CPU frequency transition statistics"
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2007-04-19 04:18:13 +08:00
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help
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2016-06-01 04:14:44 +08:00
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Export CPU frequency statistics information through sysfs.
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2007-04-19 04:18:13 +08:00
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If in doubt, say N.
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2005-04-17 06:20:36 +08:00
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choice
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prompt "Default CPUFreq governor"
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2013-05-05 20:18:08 +08:00
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default CPU_FREQ_DEFAULT_GOV_USERSPACE if ARM_SA1100_CPUFREQ || ARM_SA1110_CPUFREQ
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2020-07-22 17:37:32 +08:00
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default CPU_FREQ_DEFAULT_GOV_SCHEDUTIL if ARM64 || ARM
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2020-03-27 03:24:35 +08:00
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default CPU_FREQ_DEFAULT_GOV_SCHEDUTIL if X86_INTEL_PSTATE && SMP
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2005-04-17 06:20:36 +08:00
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default CPU_FREQ_DEFAULT_GOV_PERFORMANCE
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help
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This option sets which CPUFreq governor shall be loaded at
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2020-03-27 03:24:35 +08:00
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startup. If in doubt, use the default setting.
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2005-04-17 06:20:36 +08:00
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config CPU_FREQ_DEFAULT_GOV_PERFORMANCE
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bool "performance"
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select CPU_FREQ_GOV_PERFORMANCE
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help
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Use the CPUFreq governor 'performance' as default. This sets
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the frequency statically to the highest frequency supported by
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the CPU.
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2008-04-19 04:31:13 +08:00
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config CPU_FREQ_DEFAULT_GOV_POWERSAVE
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bool "powersave"
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select CPU_FREQ_GOV_POWERSAVE
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help
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Use the CPUFreq governor 'powersave' as default. This sets
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the frequency statically to the lowest frequency supported by
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the CPU.
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2005-04-17 06:20:36 +08:00
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config CPU_FREQ_DEFAULT_GOV_USERSPACE
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bool "userspace"
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select CPU_FREQ_GOV_USERSPACE
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help
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Use the CPUFreq governor 'userspace' as default. This allows
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2008-12-30 05:14:56 +08:00
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you to set the CPU frequency manually or when a userspace
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2005-04-17 06:20:36 +08:00
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program shall be able to set the CPU dynamically without having
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to enable the userspace governor manually.
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2007-10-03 04:28:12 +08:00
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config CPU_FREQ_DEFAULT_GOV_ONDEMAND
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bool "ondemand"
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2020-10-23 23:15:56 +08:00
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depends on !(X86_INTEL_PSTATE && SMP)
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2007-10-03 04:28:12 +08:00
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select CPU_FREQ_GOV_ONDEMAND
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select CPU_FREQ_GOV_PERFORMANCE
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help
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Use the CPUFreq governor 'ondemand' as default. This allows
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you to get a full dynamic frequency capable system by simply
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loading your cpufreq low-level hardware driver.
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Be aware that not all cpufreq drivers support the ondemand
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governor. If unsure have a look at the help section of the
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driver. Fallback governor will be the performance governor.
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config CPU_FREQ_DEFAULT_GOV_CONSERVATIVE
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bool "conservative"
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2020-10-23 23:15:56 +08:00
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depends on !(X86_INTEL_PSTATE && SMP)
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2007-10-03 04:28:12 +08:00
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select CPU_FREQ_GOV_CONSERVATIVE
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select CPU_FREQ_GOV_PERFORMANCE
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help
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Use the CPUFreq governor 'conservative' as default. This allows
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you to get a full dynamic frequency capable system by simply
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loading your cpufreq low-level hardware driver.
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Be aware that not all cpufreq drivers support the conservative
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governor. If unsure have a look at the help section of the
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driver. Fallback governor will be the performance governor.
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2016-04-02 07:09:12 +08:00
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config CPU_FREQ_DEFAULT_GOV_SCHEDUTIL
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bool "schedutil"
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2016-05-11 20:52:01 +08:00
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depends on SMP
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2016-04-02 07:09:12 +08:00
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select CPU_FREQ_GOV_SCHEDUTIL
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select CPU_FREQ_GOV_PERFORMANCE
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help
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Use the 'schedutil' CPUFreq governor by default. If unsure,
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have a look at the help section of that governor. The fallback
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governor will be 'performance'.
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2005-04-17 06:20:36 +08:00
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endchoice
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config CPU_FREQ_GOV_PERFORMANCE
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2007-04-19 04:18:13 +08:00
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tristate "'performance' governor"
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help
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2005-04-17 06:20:36 +08:00
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This cpufreq governor sets the frequency statically to the
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highest available CPU frequency.
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2007-04-19 04:18:13 +08:00
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To compile this driver as a module, choose M here: the
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module will be called cpufreq_performance.
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2005-04-17 06:20:36 +08:00
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If in doubt, say Y.
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config CPU_FREQ_GOV_POWERSAVE
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2007-04-19 04:18:13 +08:00
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tristate "'powersave' governor"
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help
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2005-04-17 06:20:36 +08:00
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This cpufreq governor sets the frequency statically to the
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lowest available CPU frequency.
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2007-04-19 04:18:13 +08:00
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To compile this driver as a module, choose M here: the
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module will be called cpufreq_powersave.
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2005-04-17 06:20:36 +08:00
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If in doubt, say Y.
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config CPU_FREQ_GOV_USERSPACE
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2007-04-19 04:18:13 +08:00
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tristate "'userspace' governor for userspace frequency scaling"
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help
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2005-04-17 06:20:36 +08:00
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Enable this cpufreq governor when you either want to set the
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2008-12-30 05:14:56 +08:00
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CPU frequency manually or when a userspace program shall
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2005-04-17 06:20:36 +08:00
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be able to set the CPU dynamically, like on LART
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2006-04-03 20:21:00 +08:00
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<http://www.lartmaker.nl/>.
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2005-04-17 06:20:36 +08:00
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2007-04-19 04:18:13 +08:00
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To compile this driver as a module, choose M here: the
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module will be called cpufreq_userspace.
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2005-04-17 06:20:36 +08:00
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For details, take a look at <file:Documentation/cpu-freq/>.
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If in doubt, say Y.
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config CPU_FREQ_GOV_ONDEMAND
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tristate "'ondemand' cpufreq policy governor"
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2012-12-29 09:55:20 +08:00
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select CPU_FREQ_GOV_COMMON
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2005-04-17 06:20:36 +08:00
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help
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'ondemand' - This driver adds a dynamic cpufreq policy governor.
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The governor does a periodic polling and
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changes frequency based on the CPU utilization.
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The support for this governor depends on CPU capability to
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do fast frequency switching (i.e, very low latency frequency
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transitions).
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2007-04-19 04:18:13 +08:00
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To compile this driver as a module, choose M here: the
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module will be called cpufreq_ondemand.
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2005-04-17 06:20:36 +08:00
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For details, take a look at linux/Documentation/cpu-freq.
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If in doubt, say N.
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2005-06-01 10:03:47 +08:00
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config CPU_FREQ_GOV_CONSERVATIVE
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tristate "'conservative' cpufreq governor"
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depends on CPU_FREQ
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2012-12-29 09:55:20 +08:00
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select CPU_FREQ_GOV_COMMON
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2005-06-01 10:03:47 +08:00
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help
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'conservative' - this driver is rather similar to the 'ondemand'
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governor both in its source code and its purpose, the difference is
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its optimisation for better suitability in a battery powered
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environment. The frequency is gracefully increased and decreased
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rather than jumping to 100% when speed is required.
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If you have a desktop machine then you should really be considering
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the 'ondemand' governor instead, however if you are using a laptop,
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PDA or even an AMD64 based computer (due to the unacceptable
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step-by-step latency issues between the minimum and maximum frequency
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transitions in the CPU) you will probably want to use this governor.
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2007-04-19 04:18:13 +08:00
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To compile this driver as a module, choose M here: the
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module will be called cpufreq_conservative.
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2005-06-01 10:03:47 +08:00
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For details, take a look at linux/Documentation/cpu-freq.
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If in doubt, say N.
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2016-04-02 07:09:12 +08:00
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config CPU_FREQ_GOV_SCHEDUTIL
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2016-08-17 04:14:55 +08:00
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bool "'schedutil' cpufreq policy governor"
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2016-05-06 21:00:38 +08:00
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depends on CPU_FREQ && SMP
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2016-04-02 07:09:12 +08:00
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select CPU_FREQ_GOV_ATTR_SET
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select IRQ_WORK
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help
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This governor makes decisions based on the utilization data provided
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by the scheduler. It sets the CPU frequency to be proportional to
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the utilization/capacity ratio coming from the scheduler. If the
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utilization is frequency-invariant, the new frequency is also
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proportional to the maximum available frequency. If that is not the
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case, it is proportional to the current frequency of the CPU. The
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frequency tipping point is at utilization/capacity equal to 80% in
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both cases.
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If in doubt, say N.
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2014-11-15 11:20:44 +08:00
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comment "CPU frequency scaling drivers"
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2014-09-09 22:28:03 +08:00
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config CPUFREQ_DT
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tristate "Generic DT based cpufreq driver"
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2014-06-10 13:09:46 +08:00
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depends on HAVE_CLK && OF
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2016-03-30 16:15:26 +08:00
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select CPUFREQ_DT_PLATDEV
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2013-12-12 06:12:27 +08:00
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select PM_OPP
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2012-09-06 15:09:11 +08:00
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help
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2014-09-09 22:28:03 +08:00
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This adds a generic DT based cpufreq driver for frequency management.
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2012-09-06 15:09:11 +08:00
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It supports both uniprocessor (UP) and symmetric multiprocessor (SMP)
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2016-09-09 19:18:07 +08:00
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systems.
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2012-09-06 15:09:11 +08:00
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If in doubt, say N.
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2016-03-30 16:15:26 +08:00
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config CPUFREQ_DT_PLATDEV
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bool
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help
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This adds a generic DT based cpufreq platdev driver for frequency
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management. This creates a 'cpufreq-dt' platform device, on the
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supported platforms.
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If in doubt, say N.
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2014-11-15 11:20:44 +08:00
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if X86
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2011-05-20 06:51:07 +08:00
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source "drivers/cpufreq/Kconfig.x86"
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2014-11-15 11:20:44 +08:00
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endif
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2011-05-20 06:51:07 +08:00
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2014-11-15 11:20:44 +08:00
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if ARM || ARM64
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2011-06-02 05:18:22 +08:00
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source "drivers/cpufreq/Kconfig.arm"
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2014-11-15 11:20:44 +08:00
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endif
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2011-06-02 05:18:22 +08:00
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2014-11-15 11:20:44 +08:00
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if PPC32 || PPC64
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source "drivers/cpufreq/Kconfig.powerpc"
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endif
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2013-04-04 20:54:17 +08:00
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2014-11-15 11:20:44 +08:00
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if IA64
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2013-04-04 20:54:20 +08:00
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config IA64_ACPI_CPUFREQ
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tristate "ACPI Processor P-States driver"
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depends on ACPI_PROCESSOR
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help
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This driver adds a CPUFreq driver which utilizes the ACPI
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Processor Performance States.
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For details, take a look at <file:Documentation/cpu-freq/>.
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If in doubt, say N.
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2014-11-15 11:20:44 +08:00
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endif
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2013-04-04 20:54:20 +08:00
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2014-11-15 11:20:44 +08:00
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if MIPS
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2017-02-08 05:58:55 +08:00
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config BMIPS_CPUFREQ
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tristate "BMIPS CPUfreq Driver"
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help
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This option adds a CPUfreq driver for BMIPS processors with
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support for configurable CPU frequency.
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For now, BMIPS5 chips are supported (such as the Broadcom 7425).
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If in doubt, say N.
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2013-04-04 20:54:21 +08:00
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config LOONGSON2_CPUFREQ
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tristate "Loongson2 CPUFreq Driver"
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2017-11-16 05:17:55 +08:00
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depends on LEMOTE_MACH2F
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2013-04-04 20:54:21 +08:00
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help
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This option adds a CPUFreq driver for loongson processors which
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support software configurable cpu frequency.
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Loongson2F and it's successors support this feature.
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For details, take a look at <file:Documentation/cpu-freq/>.
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If in doubt, say N.
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2014-10-17 18:23:31 +08:00
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config LOONGSON1_CPUFREQ
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tristate "Loongson1 CPUFreq Driver"
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2017-11-16 05:17:55 +08:00
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depends on LOONGSON1_LS1B
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2014-10-17 18:23:31 +08:00
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help
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This option adds a CPUFreq driver for loongson1 processors which
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support software configurable cpu frequency.
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For details, take a look at <file:Documentation/cpu-freq/>.
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If in doubt, say N.
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2014-11-15 11:20:44 +08:00
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endif
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2014-10-17 18:23:31 +08:00
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2014-11-15 11:20:44 +08:00
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if SPARC64
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2013-04-04 20:54:24 +08:00
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config SPARC_US3_CPUFREQ
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tristate "UltraSPARC-III CPU Frequency driver"
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help
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This adds the CPUFreq driver for UltraSPARC-III processors.
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For details, take a look at <file:Documentation/cpu-freq>.
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If in doubt, say N.
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config SPARC_US2E_CPUFREQ
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tristate "UltraSPARC-IIe CPU Frequency driver"
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help
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This adds the CPUFreq driver for UltraSPARC-IIe processors.
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For details, take a look at <file:Documentation/cpu-freq>.
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If in doubt, say N.
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2014-11-15 11:20:44 +08:00
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endif
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2013-04-04 20:54:24 +08:00
|
|
|
|
2014-11-15 11:20:44 +08:00
|
|
|
if SUPERH
|
2013-04-04 20:54:22 +08:00
|
|
|
config SH_CPU_FREQ
|
|
|
|
tristate "SuperH CPU Frequency driver"
|
|
|
|
help
|
|
|
|
This adds the cpufreq driver for SuperH. Any CPU that supports
|
|
|
|
clock rate rounding through the clock framework can use this
|
|
|
|
driver. While it will make the kernel slightly larger, this is
|
|
|
|
harmless for CPUs that don't support rate rounding. The driver
|
|
|
|
will also generate a notice in the boot log before disabling
|
|
|
|
itself if the CPU in question is not capable of rate rounding.
|
|
|
|
|
|
|
|
For details, take a look at <file:Documentation/cpu-freq>.
|
|
|
|
|
|
|
|
If unsure, say N.
|
2014-11-15 11:20:44 +08:00
|
|
|
endif
|
2013-04-04 20:54:22 +08:00
|
|
|
|
2015-03-13 12:39:02 +08:00
|
|
|
config QORIQ_CPUFREQ
|
|
|
|
tristate "CPU frequency scaling driver for Freescale QorIQ SoCs"
|
2020-05-07 19:29:53 +08:00
|
|
|
depends on OF && COMMON_CLK
|
|
|
|
depends on PPC_E500MC || SOC_LS1021A || ARCH_LAYERSCAPE || COMPILE_TEST
|
2015-03-13 12:39:02 +08:00
|
|
|
select CLK_QORIQ
|
|
|
|
help
|
|
|
|
This adds the CPUFreq driver support for Freescale QorIQ SoCs
|
|
|
|
which are capable of changing the CPU's frequency dynamically.
|
|
|
|
|
2011-05-20 06:51:07 +08:00
|
|
|
endif
|
|
|
|
endmenu
|