Re: [linux-sunxi] [PATCH] ARM: dts: sunxi: Raise minimum CPU voltage for sun7i-a20 to a level all boards can supply

[Julian Calaby]

Hi Maxime,

On Mon, Aug 3, 2015 at 7:34 PM, Maxime Ripard
<maxime.ripard@xxxxxxxxxxxxxxxxxx> wrote:
> On Mon, Aug 03, 2015 at 11:03:52AM +0200, Timo Sigurdsson wrote:
>> Hi again,
>>
>> Julian Calaby schrieb am 03.08.2015 06:22:
>> > My only real objection here is are there boards that can go down to
>> > 0.9v and if so, won't this change make them less power efficient in
>> > the almost-idle case? And are those power savings enough to justify
>> > not accepting this patch?
>>
>> It will probably make those boards less power efficient, yes. On the
>> other hand, boards that have their CPU regulator set to min. 1.0V might
>> also draw more power because the lowest frequency is not available,
>> even though the savings due to frequency are likely to be lower than
>> the savings due to voltage.
>
> Guys, isn't this whole discussion a bit moot? We're not doing any kind
> of power management but cpufreq, so maybe there's a lot more to do
> before we actually can have these kind of arguments?
>
> Plus this OPP has never been used anyway, so this patch is not going
> to increase the power consumption either.

Oh, I didn't know that. Therefore I withdraw my objections, patch away!

Thanks,

-- 
Julian Calaby

Email: julian.calaby@xxxxxxxxx
Profile: http://www.google.com/profiles/julian.calaby/
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