This patch series introduces support for CPU overclocking technique called Boost.
It is a follow up of a LAB governor proposal. Boost is a LAB component: http://thread.gmane.org/gmane.linux.kernel/1484746/match=cpufreq Boost unifies hardware based solution (e.g. Intel Nehalem) with software oriented one (like the one done at Exynos). For this reason cpufreq/freq_table code has been reorganized to include common code. Important design decisions: - Boost related code is compiled-in unconditionally to cpufreq core and disabled by default. The cpufreq_driver is responsibile for setting boost_supported flag and providing set_boost callback(if HW support is needed). For software managed boost, special Kconfig flag - CONFIG_CPU_FREQ_BOOST_SW has been defined. It will be selected only when a target platform has thermal framework properly configured. - struct cpufreq_driver has been extended with boost related fields: -- boost_supported - when driver supports boosting -- boost_enabled - boost state -- set_boost - callback to function, which is necessary to enable/disable boost - Boost sysfs attribute (/sys/devices/system/cpu/cpufreq/boost) is visible _only_ when cpufreq driver supports Boost. - No special spin_lock for Boost was created. The one from cpufreq core was reused. - The Boost code doesn't rely on any policy. When boost state is changed, then the policy list is iterated and proper adjustements are done. - To improve safety level, the thermal framework is also extended to disable software boosting, when thermal trip point is reached. After cooling down the boost can be enabled again. This emulates behaviour similar to HW managed boost (like x86) Tested at HW: Exynos 4412 3.12-rc7 Linux Intel Core i7-3770 3.12-rc7 Linux Above patches were posted on top of kernel_pm/bleeding-edge (SHA1: acc3663ce3f9cde3a7da88fb478531c58d5ed399) Lukasz Majewski (7): cpufreq: Add boost frequency support in core cpufreq:acpi:x86: Adjust the acpi-cpufreq.c code to work with common boost solution cpufreq:boost:Kconfig: Provide support for software managed BOOST cpufreq:exynos:Extend Exynos cpufreq driver to support boost framework Documentation:cpufreq:boost: Update BOOST documentation cpufreq:exynos4x12: Change L0 driver data to CPUFREQ_BOOST_FREQ thermal:exynos:boost: Automatic enable/disable of BOOST feature (at Exynos4412) Documentation/cpu-freq/boost.txt | 26 +++---- drivers/cpufreq/Kconfig | 4 + drivers/cpufreq/Kconfig.arm | 15 ++++ drivers/cpufreq/acpi-cpufreq.c | 86 +++++++-------------- drivers/cpufreq/cpufreq.c | 118 ++++++++++++++++++++++++++++- drivers/cpufreq/exynos-cpufreq.c | 3 + drivers/cpufreq/exynos4x12-cpufreq.c | 2 +- drivers/cpufreq/freq_table.c | 56 ++++++++++++-- drivers/thermal/samsung/exynos_tmu_data.c | 47 ++++++++++++ include/linux/cpufreq.h | 24 ++++++ 10 files changed, 302 insertions(+), 79 deletions(-) -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
