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PM / devfreq: tegra: add devfreq driver for Tegra Activity Monitor

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The ACTMON block can monitor several counters, providing averaging and firing
interrupts based on watermarking configuration. This implementation monitors
the MCALL and MCCPU counters to choose an appropriate frequency for the
external memory clock.

This patch is based on work by Alex Frid <afrid@nvidia.com> and Mikko
Perttunen <mikko.perttunen@kapsi.fi>.

Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
This commit is contained in:
Tomeu Vizoso
2014-11-24 13:28:17 +01:00
committed by MyungJoo Ham
parent 26bc420b59
commit 6234f38016
3 changed files with 729 additions and 0 deletions
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10
drivers/devfreq/Kconfig
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@@ -87,4 +87,14 @@ config ARM_EXYNOS5_BUS_DEVFREQ
It reads PPMU counters of memory controllers and adjusts the
operating frequencies and voltages with OPP support.
config ARM_TEGRA_DEVFREQ
tristate "Tegra DEVFREQ Driver"
depends on ARCH_TEGRA_124_SOC
select DEVFREQ_GOV_SIMPLE_ONDEMAND
select PM_OPP
help
This adds the DEVFREQ driver for the Tegra family of SoCs.
It reads ACTMON counters of memory controllers and adjusts the
operating frequencies and voltages with OPP support.
endif # PM_DEVFREQ