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- #
- # CPU Frequency scaling
- #
- menu "CPU Frequency scaling"
- source "drivers/cpufreq/Kconfig"
- if CPU_FREQ
- comment "CPUFreq processor drivers"
- config X86_POWERNOW_K8
- tristate "AMD Opteron/Athlon64 PowerNow!"
- select CPU_FREQ_TABLE
- help
- This adds the CPUFreq driver for mobile AMD Opteron/Athlon64 processors.
- For details, take a look at <file:Documentation/cpu-freq/>.
- If in doubt, say N.
- config X86_POWERNOW_K8_ACPI
- bool
- depends on X86_POWERNOW_K8 && ACPI_PROCESSOR
- depends on !(X86_POWERNOW_K8 = y && ACPI_PROCESSOR = m)
- default y
- config X86_SPEEDSTEP_CENTRINO
- tristate "Intel Enhanced SpeedStep"
- select CPU_FREQ_TABLE
- depends on ACPI_PROCESSOR
- help
- This adds the CPUFreq driver for Enhanced SpeedStep enabled
- mobile CPUs. This means Intel Pentium M (Centrino) CPUs
- or 64bit enabled Intel Xeons.
- For details, take a look at <file:Documentation/cpu-freq/>.
- If in doubt, say N.
- config X86_SPEEDSTEP_CENTRINO_ACPI
- bool
- depends on X86_SPEEDSTEP_CENTRINO
- default y
- config X86_ACPI_CPUFREQ
- tristate "ACPI Processor P-States driver"
- depends on ACPI_PROCESSOR
- help
- This driver adds a CPUFreq driver which utilizes the ACPI
- Processor Performance States.
- For details, take a look at <file:Documentation/cpu-freq/>.
- If in doubt, say N.
- comment "shared options"
- config X86_ACPI_CPUFREQ_PROC_INTF
- bool "/proc/acpi/processor/../performance interface (deprecated)"
- depends on PROC_FS
- depends on X86_ACPI_CPUFREQ || X86_SPEEDSTEP_CENTRINO_ACPI || X86_POWERNOW_K8_ACPI
- help
- This enables the deprecated /proc/acpi/processor/../performance
- interface. While it is helpful for debugging, the generic,
- cross-architecture cpufreq interfaces should be used.
- If in doubt, say N.
- config X86_P4_CLOCKMOD
- tristate "Intel Pentium 4 clock modulation"
- depends on EMBEDDED
- help
- This adds the clock modulation driver for Intel Pentium 4 / XEON
- processors. When enabled it will lower CPU temperature by skipping
- clocks.
- This driver should be only used in exceptional
- circumstances when very low power is needed because it causes severe
- slowdowns and noticeable latencies. Normally Speedstep should be used
- instead.
- For details, take a look at <file:Documentation/cpu-freq/>.
- Unless you are absolutely sure say N.
- config X86_SPEEDSTEP_LIB
- tristate
- default X86_P4_CLOCKMOD
- endif
- endmenu
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