Re: [RESEND RFC PATCH 2/2] ARM: dts: rockchip: Update the cpu freqs table

[Xing Zheng]

Hi Heiko,

On 2016å01æ09æ 03:16, Heiko Stuebner wrote:
> Hi Xing,
>
> Am Freitag, 8. Januar 2016, 19:31:38 schrieb Xing Zheng:
> > Actually, we need more cpu freqs which are 50MHz integer multiples.
> >
> > Signed-off-by: Xing Zheng <zhengxing@xxxxxxxxxxxxxx>
> > ---
> >
> >   arch/arm/boot/dts/rk3036.dtsi |   13 ++++++++++++-
> >   1 file changed, 12 insertions(+), 1 deletion(-)
> >
> > diff --git a/arch/arm/boot/dts/rk3036.dtsi b/arch/arm/boot/dts/rk3036.dtsi
> > index 1cb5877..1a773eb 100644
> > --- a/arch/arm/boot/dts/rk3036.dtsi
> > +++ b/arch/arm/boot/dts/rk3036.dtsi
> > @@ -79,7 +79,18 @@
> >   			resets = <&cru SRST_CORE0>;
> >   			operating-points = <
> >   				/* KHz    uV */
> > -				 816000 1000000
> > +				1200000 1200000
> > +				1100000 1200000
> > +				1000000 1200000
> > +				 900000 1200000
> > +				 800000 1200000
> > +				 700000 1200000
> > +				 600000 1200000
> > +				 500000 1200000
> > +				 400000 1200000
> > +				 300000 1200000
> > +				 200000 1200000
> > +				 100000 1200000
> what about reducing the voltage as well?
>
> >From rk3288-specific discussions I remember that reducing the frequency
> without touching the voltage, didn't really save so much energy.
> And it looks like it was running 816MHz@xxxx just fine as well.
>
> I guess you should find out which voltages are really necessary for each
> step.
>
>
> Heiko
Thank you for your comments. :-)

Yes, these patches currently still in draft stage. Modify the frequency 
of 816MHz is for mac apll patch can be FROMLIST for Kylin Board,
and will work cpu frequency table as a start.

We know you want to set the appropriate frequency of different batches 
of The RK3036 SoCs take some time,so I just tested a fixed
high voltage 1.2v on my evb board, the frequency of the voltage to 
ensure that we can work needed.
We'll start work dynamically adjust the voltage.

Thanks.

- Xing Zheng