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cpufreq: Add Tegra186 cpufreq driver

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Add a new cpufreq driver for Tegra186 (and likely later).
The CPUs are organized into two clusters, Denver and A57,
with two and four cores respectively. CPU frequency can be
adjusted by writing the desired rate divisor and a voltage
hint to a special per-core register.

The frequency of each core can be set individually; however,
this is just a hint as all CPUs in a cluster will run at
the maximum rate of non-idle CPUs in the cluster.

Signed-off-by: Mikko Perttunen <mperttunen@nvidia.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:
Mikko Perttunen
2017-04-11 11:09:15 +03:00
committed by Rafael J. Wysocki
parent eafca85163
commit 939dc6f51e
3 changed files with 282 additions and 0 deletions
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6
drivers/cpufreq/Kconfig.arm
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@@ -247,6 +247,12 @@ config ARM_TEGRA124_CPUFREQ
help
This adds the CPUFreq driver support for Tegra124 SOCs.
config ARM_TEGRA186_CPUFREQ
tristate "Tegra186 CPUFreq support"
depends on ARCH_TEGRA && TEGRA_BPMP
help
This adds the CPUFreq driver support for Tegra186 SOCs.
config ARM_TI_CPUFREQ
bool "Texas Instruments CPUFreq support"
depends on ARCH_OMAP2PLUS