Lines Matching +full:system +full:- +full:clock +full:- +full:frequency
1 # SPDX-License-Identifier: GPL-2.0-only
2 menu "CPU Frequency scaling"
5 bool "CPU Frequency scaling"
8 CPU Frequency scaling allows you to change the clock speed of
10 the lower the CPU clock speed, the less power the CPU consumes.
13 clock speed, you need to either enable a dynamic cpufreq governor
16 For details, take a look at <file:Documentation/cpu-freq>.
31 bool "CPU frequency transition statistics"
33 Export CPU frequency statistics information through sysfs.
52 the frequency statically to the highest frequency supported by
60 the frequency statically to the lowest frequency supported by
68 you to set the CPU frequency manually or when a userspace
79 you to get a full dynamic frequency capable system by simply
80 loading your cpufreq low-level hardware driver.
92 you to get a full dynamic frequency capable system by simply
93 loading your cpufreq low-level hardware driver.
113 This cpufreq governor sets the frequency statically to the
114 highest available CPU frequency.
124 This cpufreq governor sets the frequency statically to the
125 lowest available CPU frequency.
133 tristate "'userspace' governor for userspace frequency scaling"
136 CPU frequency manually or when a userspace program shall
143 For details, take a look at <file:Documentation/cpu-freq/>.
151 'ondemand' - This driver adds a dynamic cpufreq policy governor.
153 changes frequency based on the CPU utilization.
155 do fast frequency switching (i.e, very low latency frequency
161 For details, take a look at linux/Documentation/cpu-freq.
170 'conservative' - this driver is rather similar to the 'ondemand'
173 environment. The frequency is gracefully increased and decreased
179 step-by-step latency issues between the minimum and maximum frequency
185 For details, take a look at linux/Documentation/cpu-freq.
196 by the scheduler. It sets the CPU frequency to be proportional to
198 utilization is frequency-invariant, the new frequency is also
199 proportional to the maximum available frequency. If that is not the
200 case, it is proportional to the current frequency of the CPU. The
201 frequency tipping point is at utilization/capacity equal to 80% in
206 comment "CPU frequency scaling drivers"
214 This adds a generic DT based cpufreq driver for frequency management.
223 This adds a generic DT based cpufreq platdev driver for frequency
224 management. This creates a 'cpufreq-dt' platform device, on the
243 tristate "ACPI Processor P-States driver"
249 For details, take a look at <file:Documentation/cpu-freq/>.
259 support for configurable CPU frequency.
270 support software configurable cpu frequency.
274 For details, take a look at <file:Documentation/cpu-freq/>.
283 support software configurable cpu frequency.
285 For details, take a look at <file:Documentation/cpu-freq/>.
292 tristate "UltraSPARC-III CPU Frequency driver"
294 This adds the CPUFreq driver for UltraSPARC-III processors.
296 For details, take a look at <file:Documentation/cpu-freq>.
301 tristate "UltraSPARC-IIe CPU Frequency driver"
303 This adds the CPUFreq driver for UltraSPARC-IIe processors.
305 For details, take a look at <file:Documentation/cpu-freq>.
312 tristate "SuperH CPU Frequency driver"
315 clock rate rounding through the clock framework can use this
321 For details, take a look at <file:Documentation/cpu-freq>.
327 tristate "CPU frequency scaling driver for Freescale QorIQ SoCs"
333 which are capable of changing the CPU's frequency dynamically.