X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=arch%2Fx86_64%2Fkernel%2Fcpufreq%2FKconfig;h=acaf62aa5e15c87f1f6d432370faec260d0428b8;hb=6a77f38946aaee1cd85eeec6cf4229b204c15071;hp=dcb518eb2831e1e76c38dd47080412ad15c80746;hpb=c7b5ebbddf7bcd3651947760f423e3783bbe6573;p=linux-2.6.git
diff --git a/arch/x86_64/kernel/cpufreq/Kconfig b/arch/x86_64/kernel/cpufreq/Kconfig
index dcb518eb2..acaf62aa5 100644
--- a/arch/x86_64/kernel/cpufreq/Kconfig
+++ b/arch/x86_64/kernel/cpufreq/Kconfig
@@ -4,18 +4,6 @@
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
- or at
-
- If in doubt, say N.
-
source "drivers/cpufreq/Kconfig"
config CPU_FREQ_TABLE
@@ -48,7 +36,7 @@ config X86_POWERNOW_K8_ACPI
config X86_SPEEDSTEP_CENTRINO
tristate "Intel Enhanced SpeedStep"
- depends on CPU_FREQ_TABLE
+ 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
@@ -58,21 +46,11 @@ config X86_SPEEDSTEP_CENTRINO
If in doubt, say N.
-config X86_SPEEDSTEP_CENTRINO_TABLE
+config X86_SPEEDSTEP_CENTRINO_ACPI
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
- depends on ((X86_SPEEDSTEP_CENTRINO = "m" && ACPI_PROCESSOR) || (X86_SPEEDSTEP_CENTRINO = "y" && ACPI_PROCESSOR = "y"))
- help
- Use primarily the information provided in the BIOS ACPI tables
- to determine valid CPU frequency and voltage pairings.
-
- If in doubt, say Y.
-
config X86_ACPI_CPUFREQ
tristate "ACPI Processor P-States driver"
depends on CPU_FREQ_TABLE && ACPI_PROCESSOR
@@ -84,9 +62,13 @@ config X86_ACPI_CPUFREQ
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 X86_ACPI_CPUFREQ && PROC_FS
+ 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,
@@ -94,5 +76,29 @@ config X86_ACPI_CPUFREQ_PROC_INTF
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 .
+
+ Unless you are absolutely sure say N.
+
+
+config X86_SPEEDSTEP_LIB
+ tristate
+ depends on (X86_P4_CLOCKMOD)
+ default (X86_P4_CLOCKMOD)
+
+
endmenu