| # |
| # CPU Frequency scaling |
| # |
| |
| menu "CPU Frequency scaling" |
| |
| source "drivers/cpufreq/Kconfig" |
| |
| config CPU_FREQ_TABLE |
| tristate "CPU frequency table helpers" |
| depends on CPU_FREQ |
| default y |
| help |
| Many CPUFreq drivers use these helpers, so only say N here if |
| the CPUFreq driver of your choice doesn't need these helpers. |
| |
| If in doubt, say Y. |
| |
| comment "CPUFreq processor drivers" |
| depends on CPU_FREQ |
| |
| config X86_POWERNOW_K8 |
| tristate "AMD Opteron/Athlon64 PowerNow!" |
| depends on 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 = "m" && ACPI_PROCESSOR) || (X86_POWERNOW_K8 = "y" && ACPI_PROCESSOR = "y")) |
| default y |
| |
| config X86_SPEEDSTEP_CENTRINO |
| tristate "Intel Enhanced SpeedStep" |
| depends on CPU_FREQ_TABLE && 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 CPU_FREQ_TABLE && 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" |
| depends on CPU_FREQ |
| |
| 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 CPU_FREQ_TABLE && 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 |
| depends on (X86_P4_CLOCKMOD) |
| default (X86_P4_CLOCKMOD) |
| |
| |
| endmenu |
| |
