linux-kernel - Re: [PATCH 0/6] arm64: g12a: add support for DVFS

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Message-ID: <7hk1bn43fq.fsf@baylibre.com>
Date:   Thu, 08 Aug 2019 16:56:09 -0700
From:   Kevin Hilman <khilman@...libre.com>
To:     Neil Armstrong <narmstrong@...libre.com>
Cc:     Neil Armstrong <narmstrong@...libre.com>,
        linux-amlogic@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/6] arm64: g12a: add support for DVFS

Kevin Hilman <khilman@...libre.com> writes:

> Neil Armstrong <narmstrong@...libre.com> writes:
>
>> The G12A & G12B SoCs has kernel controllable CPU clocks and PWMs for
>> voltage regulators.
>>
>> This patchsets moves the meson-g12a.dtsi to meson-g12-common.dtsi to simplify
>> handling the G12A & G12B differences in the meson-g12a.dtsi & meson-g12b.dtsi
>> files, like the OPPs and CPU nodes.
>>
>> Then G12A & G12B OPP tables are added, followed by the CPU voltages regulators
>> in each boards DT.
>>
>> It was voluntary chosen to enabled DVFS (CPU regulator and CPU clocks) only
>> in boards, to make sure only tested boards has DVFS enabled.
>>
>> This patchset :
>> - moves the G12A DT to a common g12a-common dtsi
>> - adds the G12A and G12B OPPs
>> - enables DVFS on all supported boards
>>
>> Dependencies:
>> - None
>
> Not quite.  The last patch to enable DVFS on odroid-n2 has a build-time
> dependency on the clock series that adds the CPUB clock.
>
> I'll apply the rest of the series to v5.4/dt64 until there's a stable
> clock tag I can use for the clocks.

In order to test this, I noticed another dependency needed for the PWM
regulators to work:

   https://lore.kernel.org/linux-amlogic/20190729125838.6498-1-narmstrong@baylibre.com/

With that and the clock deps, it's working well on my odroid-n2.

Tested-by: Kevin Hilman <khilman@...libre.com>

Thanks,

Kevin