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config CPU_FREQ
        bool "CPU Frequency scaling"
        help
          CPU Frequency scaling allows you to change the clock speed of 
          CPUs on the fly. This is a nice method to save power, because 
          the lower the CPU clock speed, the less power the CPU consumes.

          Note that this driver doesn't automatically change the CPU
          clock speed, you need to either enable a dynamic cpufreq governor
          (see below) after boot, or use a userspace tool.

          To compile this driver as a module, choose M here: the
          module will be called cpufreq.

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

          If in doubt, say N.

if CPU_FREQ

config CPU_FREQ_TABLE
        tristate

config CPU_FREQ_DEBUG
        bool "Enable CPUfreq debugging"
        help
          Say Y here to enable CPUfreq subsystem (including drivers)
          debugging. You will need to activate it via the kernel
          command line by passing
             cpufreq.debug=<value>

          To get <value>, add 
               1 to activate CPUfreq core debugging,
               2 to activate CPUfreq drivers debugging, and
               4 to activate CPUfreq governor debugging

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.

          To compile this driver as a module, choose M here: the
          module will be called cpufreq_stats.

          If in doubt, say N.

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.

          If in doubt, say N.

choice
        prompt "Default CPUFreq governor"
        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_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 
          program shall be able to set the CPU dynamically without having
          to enable the userspace governor manually.

config CPU_FREQ_DEFAULT_GOV_ONDEMAND
        bool "ondemand"
        select CPU_FREQ_GOV_ONDEMAND
        select CPU_FREQ_GOV_PERFORMANCE
        help
          Use the CPUFreq governor 'ondemand' as default. This allows
          you to get a full dynamic frequency capable system by simply
          loading your cpufreq low-level hardware driver.
          Be aware that not all cpufreq drivers support the ondemand
          governor. If unsure have a look at the help section of the
          driver. Fallback governor will be the performance governor.

config CPU_FREQ_DEFAULT_GOV_CONSERVATIVE
        bool "conservative"
        select CPU_FREQ_GOV_CONSERVATIVE
        select CPU_FREQ_GOV_PERFORMANCE
        help
          Use the CPUFreq governor 'conservative' as default. This allows
          you to get a full dynamic frequency capable system by simply
          loading your cpufreq low-level hardware driver.
          Be aware that not all cpufreq drivers support the conservative
          governor. If unsure have a look at the help section of the
          driver. Fallback governor will be the performance governor.
endchoice

config CPU_FREQ_GOV_PERFORMANCE
        tristate "'performance' governor"
        help
          This cpufreq governor sets the frequency statically to the
          highest available CPU frequency.

          To compile this driver as a module, choose M here: the
          module will be called cpufreq_performance.

          If in doubt, say Y.

config CPU_FREQ_GOV_POWERSAVE
        tristate "'powersave' governor"
        help
          This cpufreq governor sets the frequency statically to the
          lowest available CPU frequency.

          To compile this driver as a module, choose M here: the
          module will be called cpufreq_powersave.

          If in doubt, say Y.

config CPU_FREQ_GOV_USERSPACE
        tristate "'userspace' governor for userspace frequency scaling"
        help
          Enable this cpufreq governor when you either want to set the
          CPU frequency manually or when an userspace program shall
          be able to set the CPU dynamically, like on LART 
          <http://www.lartmaker.nl/>.

          To compile this driver as a module, choose M here: the
          module will be called cpufreq_userspace.

          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"
        select CPU_FREQ_TABLE
        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). 

          To compile this driver as a module, choose M here: the
          module will be called cpufreq_ondemand.

          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.

          To compile this driver as a module, choose M here: the
          module will be called cpufreq_conservative.

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

          If in doubt, say N.

endif   # CPU_FREQ