Commit 2fb4719b authored Dec 20, 2013 by Lukasz Majewski Committed by Rafael J. Wysocki Jan 17, 2014

cpufreq / boost: Kconfig: Support for software-managed BOOST



Add CONFIG_CPU_FREQ_BOOST_SW Kconfig option such that software-managed
boost is enabled only after selecting "EXYNOS Frequency Overclocking -
Software".  It also depends on the thermal subsystem to be compiled in,
which is necessary for disabling boost and cooling down the device when
overheating is detected.

Software-managed boost _MUST_ _NOT_ be enabled without thermal subsystem
with properly defined overheating temperature thresholds.

This option doesn't affect the x86's hardware-driven boost support
in the acpi-cpufreq driver.

Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
Signed-off-by: Myungjoo Ham <myungjoo.ham@samsung.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
[rjw: Subject and changelog]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

parent cfc9c8ed

drivers/cpufreq/Kconfig

+4 −0

Original line number	Diff line number	Diff line
		@@ -20,6 +20,10 @@ if CPU_FREQ
		config CPU_FREQ_GOV_COMMON
		bool

		config CPU_FREQ_BOOST_SW
		bool
		depends on THERMAL

		config CPU_FREQ_STAT
		tristate "CPU frequency translation statistics"
		default y

drivers/cpufreq/Kconfig.arm

+15 −0

Original line number	Diff line number	Diff line
		@@ -66,6 +66,21 @@ config ARM_EXYNOS5440_CPUFREQ

		If in doubt, say N.

		config ARM_EXYNOS_CPU_FREQ_BOOST_SW
		bool "EXYNOS Frequency Overclocking - Software"
		depends on ARM_EXYNOS_CPUFREQ
		select CPU_FREQ_BOOST_SW
		select EXYNOS_THERMAL
		help
		This driver supports software managed overclocking (BOOST).
		It allows usage of special frequencies for Samsung Exynos
		processors if thermal conditions are appropriate.

		It reguires, for safe operation, thermal framework with properly
		defined trip points.

		If in doubt, say N.

		config ARM_HIGHBANK_CPUFREQ
		tristate "Calxeda Highbank-based"
		depends on ARCH_HIGHBANK

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