From mboxrd@z Thu Jan 1 00:00:00 1970 From: Xing Zheng Subject: Re: [RESEND RFC PATCH 2/2] ARM: dts: rockchip: Update the cpu freqs table Date: Sat, 9 Jan 2016 11:04:36 +0800 Message-ID: <569078C4.8080000@rock-chips.com> References: <1452252698-16765-1-git-send-email-zhengxing@rock-chips.com> <1452252698-16765-3-git-send-email-zhengxing@rock-chips.com> <4951150.PYM4FhWu6V@phil> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: In-Reply-To: <4951150.PYM4FhWu6V@phil> Sender: devicetree-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Heiko Stuebner Cc: linux-rockchip-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, keescook-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org, leozwang-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org, Rob Herring , Pawel Moll , Mark Rutland , Ian Campbell , Kumar Gala , Russell King , linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: devicetree@vger.kernel.org Hi Heiko, On 2016=E5=B9=B401=E6=9C=8809=E6=97=A5 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 >> --- >> >> 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/rk303= 6.dtsi >> index 1cb5877..1a773eb 100644 >> --- a/arch/arm/boot/dts/rk3036.dtsi >> +++ b/arch/arm/boot/dts/rk3036.dtsi >> @@ -79,7 +79,18 @@ >> resets =3D <&cru SRST_CORE0>; >> operating-points =3D < >> /* 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 freque= ncy > without touching the voltage, didn't really save so much energy. > And it looks like it was running 816MHz@1.0V just fine as well. > > I guess you should find out which voltages are really necessary for e= ach > step. > > > Heiko > Thank you for your comments. :-) Yes, these patches currently still in draft stage. Modify the frequency= =20 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=20 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=20 ensure that we can work needed. We'll start work dynamically adjust the voltage. Thanks. - Xing Zheng -- To unsubscribe from this list: send the line "unsubscribe devicetree" i= n the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html