diff options
| author | Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> | 2005-07-29 16:15:00 -0700 |
|---|---|---|
| committer | Tony Luck <tony.luck@intel.com> | 2005-08-26 15:09:24 -0700 |
| commit | 4db8699bcfa8faddb5727b1cb010a4d9b8a42e8c (patch) | |
| tree | eb4cb14927ed9cf4507f875cd69fe35f87b3b3bc /arch/ia64/kernel/cpufreq/Kconfig | |
| parent | fd589e0b662c1ea8cfb1e0d20d60a2510979865b (diff) | |
[IA64] Add ACPI based P-state support
Patch to support P-state transitions on ia64. This driver is based on ACPI,
and uses the ACPI processor driver interface to find out the P-state support
information for the processor. This driver plugs into generic cpufreq
infrastructure.
Once this driver is loaded successfully, ondemand/userspace governor can be
used to change the CPU frequency dynamically based on load or on request from
userspace process.
Refer :
ACPI specification -
http://www.acpi.info
P-state related PAL calls -
http://developer.intel.com/design/itanium/downloads/24869909.pdf
Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'arch/ia64/kernel/cpufreq/Kconfig')
| -rw-r--r-- | arch/ia64/kernel/cpufreq/Kconfig | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/arch/ia64/kernel/cpufreq/Kconfig b/arch/ia64/kernel/cpufreq/Kconfig new file mode 100644 index 00000000000..2d9d5279b98 --- /dev/null +++ b/arch/ia64/kernel/cpufreq/Kconfig @@ -0,0 +1,29 @@ + +# +# CPU Frequency scaling +# + +menu "CPU Frequency scaling" + +source "drivers/cpufreq/Kconfig" + +if CPU_FREQ + +comment "CPUFreq processor drivers" + +config IA64_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. + + For details, take a look at <file:Documentation/cpu-freq/>. + + If in doubt, say N. + +endif # CPU_FREQ + +endmenu + |