kconfig

来自「Linux Kernel 2.6.9 for OMAP1710」· 代码 · 共 100 行

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.

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
	help
	  This option sets which CPUFreq governor shall be loaded at
	  startup. If in doubt, select 'performance'.

config CPU_FREQ_DEFAULT_GOV_PERFORMANCE
	bool "performance"
	select CPU_FREQ_GOV_PERFORMANCE
	help
	  Use the CPUFreq governor 'performance' as default. This sets
	  the frequency statically to the highest frequency supported by
	  the CPU.

config CPU_FREQ_DEFAULT_GOV_USERSPACE
	bool "userspace"
	select CPU_FREQ_GOV_USERSPACE
	help
	  Use the CPUFreq governor 'userspace' as default. This allows
	  you to set the CPU frequency manually or when an userspace 
	  programm shall be able to set the CPU dynamically without having
	  to enable the userspace governor manually.

endchoice

config CPU_FREQ_GOV_PERFORMANCE
       tristate "'performance' governor"
       depends on CPU_FREQ
       help
	  This cpufreq governors set the frequency statically to the
	  highest available CPU frequency.

	  If in doubt, say Y.

config CPU_FREQ_GOV_POWERSAVE
       tristate "'powersave' governor"
       depends on CPU_FREQ
       help
	  Theis cpufreq governors set the frequency statically to the
	  lowest available CPU frequency.

	  If in doubt, say Y.

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 programm shall
          be able to set the CPU dynamically, like on LART 
	  <http://www.lart.tudelft.nl/>

	  For details, take a look at <file:Documentation/cpu-freq/>.

	  If in doubt, say Y.

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 
	  changes frequency based on the CPU utilization.
	  The support for this governor depends on CPU capability to
	  do fast frequency switching (i.e, very low latency frequency
	  transitions). 

	  For details, take a look at linux/Documentation/cpu-freq.

	  If in doubt, say N.

config CPU_FREQ_24_API
	bool "/proc/sys/cpu/ interface (2.4. / OLD)"
	depends on CPU_FREQ && SYSCTL && CPU_FREQ_GOV_USERSPACE
	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.