| # | |
| # 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 | |