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>
diff --git a/drivers/cpufreq/Kconfig b/drivers/cpufreq/Kconfig
index 386dbc9..d100926 100644
--- a/drivers/cpufreq/Kconfig
+++ b/drivers/cpufreq/Kconfig
@@ -20,6 +20,10 @@
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
diff --git a/drivers/cpufreq/Kconfig.arm b/drivers/cpufreq/Kconfig.arm
index 0468ad1..3129749 100644
--- a/drivers/cpufreq/Kconfig.arm
+++ b/drivers/cpufreq/Kconfig.arm
@@ -66,6 +66,21 @@
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