diff options
| author | Dmitry Osipenko <digetx@gmail.com> | 2019-07-25 18:18:31 +0300 |
|---|---|---|
| committer | Thierry Reding <treding@nvidia.com> | 2019-10-29 14:02:59 +0100 |
| commit | 496747e7d907b01bd2507d61bdd6874b987c9629 (patch) | |
| tree | 9dce7cfdd794925e1f3b209927353c53b0a735be /drivers/soc/tegra/Kconfig | |
| parent | c7ccfccabb0f819eae1a191ccd94269f577e4523 (diff) | |
soc/tegra: regulators: Add regulators coupler for Tegra20
Add regulators coupler for Tegra20 SoCs that performs voltage balancing
of a coupled regulators and thus provides voltage scaling functionality.
There are 3 coupled regulators on all Tegra20 SoCs: CORE, RTC and CPU.
The CORE and RTC voltages shall be in range of 170mV from each other and
they both shall be higher than the CPU voltage by at least 120mV. This
sounds like it could be handle by a generic voltage balancer, but the CORE
voltage scaling isn't implemented in any of the upstream drivers yet.
It will take quite some time and effort to hook up voltage scaling for
all of the drivers, hence we will use a custom coupler that will manage
the CPU voltage scaling for the starter.
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Acked-By: Peter De Schrijver <pdeschrijver@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Diffstat (limited to 'drivers/soc/tegra/Kconfig')
| -rw-r--r-- | drivers/soc/tegra/Kconfig | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/soc/tegra/Kconfig b/drivers/soc/tegra/Kconfig index c8ef05d6b8c7..437466aa57e1 100644 --- a/drivers/soc/tegra/Kconfig +++ b/drivers/soc/tegra/Kconfig @@ -15,6 +15,7 @@ config ARCH_TEGRA_2x_SOC select PL310_ERRATA_769419 if CACHE_L2X0 select SOC_TEGRA_FLOWCTRL select SOC_TEGRA_PMC + select SOC_TEGRA20_VOLTAGE_COUPLER select TEGRA_TIMER help Support for NVIDIA Tegra AP20 and T20 processors, based on the @@ -135,3 +136,7 @@ config SOC_TEGRA_POWERGATE_BPMP def_bool y depends on PM_GENERIC_DOMAINS depends on TEGRA_BPMP + +config SOC_TEGRA20_VOLTAGE_COUPLER + bool "Voltage scaling support for Tegra20 SoCs" + depends on ARCH_TEGRA_2x_SOC || COMPILE_TEST |