menu "CPU Frequency scaling"
-config CPU_FREQ
- bool "CPU Frequency scaling"
- help
- Clock scaling allows you to change the clock speed of CPUs on the
- fly. This is a nice method to save battery power on notebooks,
- because the lower the clock speed, the less power the CPU consumes.
-
- For more information, take a look at <file:Documentation/cpu-freq/>
- or at <http://www.codemonkey.org.uk/projects/cpufreq/>
-
- If in doubt, say N.
-
source "drivers/cpufreq/Kconfig"
config CPU_FREQ_TABLE
If in doubt, say N.
-config X86_ACPI_CPUFREQ_PROC_INTF
- bool "/proc/acpi/processor/../performance interface (deprecated)"
- depends on X86_ACPI_CPUFREQ && PROC_FS
- 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 ELAN_CPUFREQ
tristate "AMD Elan"
depends on CPU_FREQ_TABLE && X86_ELAN
config X86_POWERNOW_K8
tristate "AMD Opteron/Athlon64 PowerNow!"
- depends on CPU_FREQ && EXPERIMENTAL
+ depends on CPU_FREQ_TABLE && EXPERIMENTAL
help
This adds the CPUFreq driver for mobile AMD Opteron/Athlon64 processors.
config X86_SPEEDSTEP_CENTRINO
tristate "Intel Enhanced SpeedStep"
depends on CPU_FREQ_TABLE
+ select X86_SPEEDSTEP_CENTRINO_TABLE if (!X86_SPEEDSTEP_CENTRINO_ACPI)
help
This adds the CPUFreq driver for Enhanced SpeedStep enabled
- mobile CPUs. This means Intel Pentium M (Centrino) CPUs.
+ mobile CPUs. This means Intel Pentium M (Centrino) CPUs. However,
+ you also need to say Y to "Use ACPI tables to decode..." below
+ [which might imply enabling ACPI] if you want to use this driver
+ on non-Banias CPUs.
For details, take a look at <file:Documentation/cpu-freq/>.
If in doubt, say N.
-config X86_SPEEDSTEP_CENTRINO_TABLE
- bool
- depends on X86_SPEEDSTEP_CENTRINO
- default y
-
config X86_SPEEDSTEP_CENTRINO_ACPI
- bool "Use ACPI tables to decode valid frequency/voltage pairs (EXPERIMENTAL)"
- depends on EXPERIMENTAL
+ bool "Use ACPI tables to decode valid frequency/voltage pairs"
+ depends on X86_SPEEDSTEP_CENTRINO
depends on ((X86_SPEEDSTEP_CENTRINO = "m" && ACPI_PROCESSOR) || (X86_SPEEDSTEP_CENTRINO = "y" && ACPI_PROCESSOR = "y"))
+ default y
help
Use primarily the information provided in the BIOS ACPI tables
- to determine valid CPU frequency and voltage pairings.
+ to determine valid CPU frequency and voltage pairings. It is
+ required for the driver to work on non-Banias CPUs.
If in doubt, say Y.
+config X86_SPEEDSTEP_CENTRINO_TABLE
+ bool "Built-in tables for Banias CPUs"
+ depends on X86_SPEEDSTEP_CENTRINO
+ default y
+ help
+ Use built-in tables for Banias CPUs if ACPI encoding
+ is not available.
+
+ If in doubt, say N.
+
config X86_SPEEDSTEP_ICH
tristate "Intel Speedstep on ICH-M chipsets (ioport interface)"
depends on CPU_FREQ_TABLE
If in doubt, say N.
-config X86_SPEEDSTEP_LIB
- tristate
- depends on (X86_SPEEDSTEP_ICH || X86_SPEEDSTEP_SMI || X86_P4_CLOCKMOD)
- default (X86_SPEEDSTEP_ICH || X86_SPEEDSTEP_SMI || X86_P4_CLOCKMOD)
-
-config X86_SPEEDSTEP_RELAXED_CAP_CHECK
- bool "Relaxed speedstep capability checks"
- depends on (X86_SPEEDSTEP_SMI || X86_SPEEDSTEP_ICH)
+config X86_CPUFREQ_NFORCE2
+ tristate "nVidia nForce2 FSB changing"
+ depends on CPU_FREQ && EXPERIMENTAL
help
- Don't perform all checks for a speedstep capable system which would
- normally be done. Some ancient or strange systems, though speedstep
- capable, don't always indicate that they are speedstep capable. This
- option let's the probing code bypass some of those checks if the
- parameter "relaxed_check=1" is passed to the module.
+ This adds the CPUFreq driver for FSB changing on nVidia nForce2
+ platforms.
+
+ For details, take a look at <file:Documentation/cpu-freq/>.
+
+ If in doubt, say N.
config X86_LONGRUN
tristate "Transmeta LongRun"
depends on CPU_FREQ
help
- This adds the CPUFreq driver for Transmeta Crusoe processors which
- support LongRun.
+ This adds the CPUFreq driver for Transmeta Crusoe and Efficeon processors
+ which support LongRun.
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_K7_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_SPEEDSTEP_LIB
+ tristate
+ depends on (X86_SPEEDSTEP_ICH || X86_SPEEDSTEP_SMI || X86_P4_CLOCKMOD)
+ default (X86_SPEEDSTEP_ICH || X86_SPEEDSTEP_SMI || X86_P4_CLOCKMOD)
+
+config X86_SPEEDSTEP_RELAXED_CAP_CHECK
+ bool "Relaxed speedstep capability checks"
+ depends on (X86_SPEEDSTEP_SMI || X86_SPEEDSTEP_ICH)
+ help
+ Don't perform all checks for a speedstep capable system which would
+ normally be done. Some ancient or strange systems, though speedstep
+ capable, don't always indicate that they are speedstep capable. This
+ option lets the probing code bypass some of those checks if the
+ parameter "relaxed_check=1" is passed to the module.
+
+
endmenu
git://git.onelab.eu / linux-2.6.git / blobdiff