From mboxrd@z Thu Jan 1 00:00:00 1970 From: Heiko Stuebner Subject: Re: [RESEND RFC PATCH 2/2] ARM: dts: rockchip: Update the cpu freqs table Date: Fri, 08 Jan 2016 20:16:19 +0100 Message-ID: <4951150.PYM4FhWu6V@phil> References: <1452252698-16765-1-git-send-email-zhengxing@rock-chips.com> <1452252698-16765-3-git-send-email-zhengxing@rock-chips.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7Bit Return-path: In-Reply-To: <1452252698-16765-3-git-send-email-zhengxing@rock-chips.com> Sender: linux-kernel-owner@vger.kernel.org To: Xing Zheng Cc: linux-rockchip@lists.infradead.org, keescook@google.com, leozwang@google.com, Rob Herring , Pawel Moll , Mark Rutland , Ian Campbell , Kumar Gala , Russell King , linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org List-Id: devicetree@vger.kernel.org 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/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@1.0V just fine as well. I guess you should find out which voltages are really necessary for each step. Heiko