| # |
| # 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 (deprecated)" |
| select CPU_FREQ_TABLE |
| depends on ACPI_PROCESSOR |
| help |
| This is deprecated and this functionality is now merged into |
| acpi_cpufreq (X86_ACPI_CPUFREQ). Use that driver instead of |
| speedstep_centrino. |
| 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 |
| |
| config X86_ACPI_CPUFREQ |
| tristate "ACPI Processor P-States driver" |
| select CPU_FREQ_TABLE |
| depends on ACPI_PROCESSOR |
| help |
| This driver adds a CPUFreq driver which utilizes the ACPI |
| Processor Performance States. |
| This driver also supports Intel Enhanced Speedstep. |
| |
| 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 |
| |
