If in doubt, say N.
+if CPU_FREQ
+
+config CPU_FREQ_TABLE
+ def_tristate m
+
config CPU_FREQ_DEBUG
bool "Enable CPUfreq debugging"
- depends on CPU_FREQ
help
Say Y here to enable CPUfreq subsystem (including drivers)
debugging. You will need to activate it via the kernel
2 to activate CPUfreq drivers debugging, and
4 to activate CPUfreq governor debugging
-config CPU_FREQ_PROC_INTF
- tristate "/proc/cpufreq interface (deprecated)"
- depends on CPU_FREQ && PROC_FS
- help
- This enables the /proc/cpufreq interface for controlling
- CPUFreq. Please note that it is recommended to use the sysfs
- interface instead (which is built automatically).
-
- For details, take a look at <file:Documentation/cpu-freq/>.
-
- If in doubt, say N.
+config CPU_FREQ_STAT
+ tristate "CPU frequency translation statistics"
+ select CPU_FREQ_TABLE
+ default y
+ help
+ This driver exports CPU frequency statistics information through sysfs
+ file system
+
+config CPU_FREQ_STAT_DETAILS
+ bool "CPU frequency translation statistics details"
+ depends on CPU_FREQ_STAT
+ help
+ This will show detail CPU frequency translation table in sysfs file
+ system
+
+# Note that it is not currently possible to set the other governors (such as ondemand)
+# as the default, since if they fail to initialise, cpufreq will be
+# left in an undefined state.
choice
prompt "Default CPUFreq governor"
- depends on CPU_FREQ
- default CPU_FREQ_DEFAULT_GOV_PERFORMANCE if !CPU_FREQ_SA1100 && !CPU_FREQ_SA1110
default CPU_FREQ_DEFAULT_GOV_USERSPACE if CPU_FREQ_SA1100 || CPU_FREQ_SA1110
+ default CPU_FREQ_DEFAULT_GOV_PERFORMANCE
help
This option sets which CPUFreq governor shall be loaded at
startup. If in doubt, select 'performance'.
config CPU_FREQ_GOV_PERFORMANCE
tristate "'performance' governor"
- depends on CPU_FREQ
help
This cpufreq governor sets the frequency statically to the
highest available CPU frequency.
config CPU_FREQ_GOV_POWERSAVE
tristate "'powersave' governor"
- depends on CPU_FREQ
help
This cpufreq governor sets the frequency statically to the
lowest available CPU frequency.
config CPU_FREQ_GOV_USERSPACE
tristate "'userspace' governor for userspace frequency scaling"
- depends on CPU_FREQ
help
Enable this cpufreq governor when you either want to set the
CPU frequency manually or when an userspace program shall
If in doubt, say Y.
-config CPU_FREQ_24_API
- bool "/proc/sys/cpu/ interface (2.4. / OLD)"
- depends on CPU_FREQ_GOV_USERSPACE
- depends on SYSCTL
- help
- This enables the /proc/sys/cpu/ sysctl interface for controlling
- the CPUFreq,"userspace" governor. This is the same interface
- as known from the 2.4.-kernel patches for CPUFreq, and offers
- the same functionality as long as "userspace" is the
- selected governor for the specified CPU.
-
- For details, take a look at <file:Documentation/cpu-freq/>.
-
- If in doubt, say N.
-
config CPU_FREQ_GOV_ONDEMAND
tristate "'ondemand' cpufreq policy governor"
- depends on CPU_FREQ
help
'ondemand' - This driver adds a dynamic cpufreq policy governor.
The governor does a periodic polling and
For details, take a look at linux/Documentation/cpu-freq.
If in doubt, say N.
+
+config CPU_FREQ_GOV_CONSERVATIVE
+ tristate "'conservative' cpufreq governor"
+ depends on CPU_FREQ
+ help
+ 'conservative' - this driver is rather similar to the 'ondemand'
+ governor both in its source code and its purpose, the difference is
+ its optimisation for better suitability in a battery powered
+ environment. The frequency is gracefully increased and decreased
+ rather than jumping to 100% when speed is required.
+
+ If you have a desktop machine then you should really be considering
+ the 'ondemand' governor instead, however if you are using a laptop,
+ PDA or even an AMD64 based computer (due to the unacceptable
+ step-by-step latency issues between the minimum and maximum frequency
+ transitions in the CPU) you will probably want to use this governor.
+
+ For details, take a look at linux/Documentation/cpu-freq.
+
+ If in doubt, say N.
+
+endif # CPU_FREQ
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