05.01.2021 20:11, Krzysztof Kozlowski пишет: > On Thu, Dec 17, 2020 at 09:05:50PM +0300, Dmitry Osipenko wrote: >> Introduce core voltage scaling for NVIDIA Tegra20/30 SoCs, which reduces >> power consumption and heating of the Tegra chips. Tegra SoC has multiple >> hardware units which belong to a core power domain of the SoC and share >> the core voltage. The voltage must be selected in accordance to a minimum >> requirement of every core hardware unit. >> >> The minimum core voltage requirement depends on: >> >> 1. Clock enable state of a hardware unit. >> 2. Clock frequency. >> 3. Unit's internal idling/active state. >> >> This series is tested on Acer A500 (T20), AC100 (T20), Nexus 7 (T30), >> Ouya (T30), TK1 (T124) and some others. I also added voltage scaling to >> the Ventana (T20) and Cardhu (T30) boards which are tested by NVIDIA's CI >> farm. Tegra30 is now couple degrees cooler on Nexus 7 and stays cool on >> Ouya (instead of becoming burning hot) while system is idling. It should >> be possible to improve this further by implementing a more advanced power >> management features for the kernel drivers. >> >> The DVFS support is opt-in for all boards, meaning that older DTBs will >> continue to work like they did it before this series. It should be possible >> to easily add the core voltage scaling support for Tegra114+ SoCs based on >> this grounding work later on, if anyone will want to implement it. > > The same comment as for your interconnect work: for sets touching > multiple systems please mention the dependencies between patches in the > cover letter. Not as a reply to such remark like I make here, but as a > separate entry in the cover letter. I'll describe all the dependencies in the next revision, thanks.
