Re: [PATCH v2 0/3] Support regulators coupling on NVIDIA Tegra20/30

Thierry Reding
2019-10-29T13:02:29Z

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On Thu, Jul 25, 2019 at 06:18:29PM +0300, Dmitry Osipenko wrote:
> Hello,
>
> The voltage regulators need to be coupled on NVIDIA Tegra20 and Tegra30
> SoCs in order to provide voltage scaling functionality in a generic way.
> All necessary regulator-core patches that added support for the regulators
> coupling are already have been merge into mainline kernel. This series
> adds customized voltage couplers for Tegra20/30 SoCs, paving the way for
> a refined CPUFreq driver that will utilize voltage scaling and other neat
> features. This is a resend of a leftover patches from a previous series
> [1] that was partially applied by Mark Brown. Please review, thanks in
> advance!
>
> [1] https://patchwork.ozlabs.org/project/linux-tegra/list/?series=115626
>
> Changelog:
>
> v2: - Some days ago OPP framework got a change that makes CPU regulator
> to be enabled at the time of CPUFreq's driver initializing OPPs.
> In a result the CPU's voltage is dropped to a minimum value on
> CPUFreq's setting up because there are no consumers at the time
> of regulator's enabling, thus CPU is getting into a big trouble.
> This problem is now resolved in the couplers code by assuming
> that min_uV=current_uV for CPU's regulator if it doesn't have
> any active consumers.
>
> Dmitry Osipenko (3):
> dt-bindings: regulator: Document regulators coupling of NVIDIA
> Tegra20/30 SoCs
> soc/tegra: regulators: Add regulators coupler for Tegra20
> soc/tegra: regulators: Add regulators coupler for Tegra30

All three patches applied, thanks.

Thierry

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