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cpufreq / intel_pstate: Change to disallow module build 

Load order is important in order for intel_pstate to take over as the
default scaling driver from acpi-cpufreq.

If both are built-in, acpi-cpufreq uses late_initcall() and
intel_pstate uses device_initcall() so it will be able to register as
the scaling before acpi-cpufreq for the processors supported by
intel_pstate.

If acpi-cpufreq is built as a module then intel_pstate still gets
first option to become the scaling driver.

Signed-off-by: Dirk Brandewie <dirk.j.brandewie@intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Dirk Brandewie 2013-02-14 22:55:34 +01:00 committed by Rafael J. Wysocki
parent 191e5edf96
commit da0d9fda37
1 changed files with 1 additions and 6 deletions
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7
drivers/cpufreq/Kconfig.x86
View File

@ -3,7 +3,7 @@
#
config X86_INTEL_PSTATE
tristate "Intel P state control"
bool "Intel P state control"
depends on X86
help
This driver provides a P state for Intel core processors.
@ -13,11 +13,6 @@ config X86_INTEL_PSTATE
When this driver is enabled it will become the perferred
scaling driver for Sandy bridge processors.
Note: This driver should be built with the same settings as
the other scaling drivers configured into the system
(module/built-in) in order for the driver to register itself
as the scaling driver on the system.
If in doubt, say N.
config X86_PCC_CPUFREQ