From mboxrd@z Thu Jan 1 00:00:00 1970 From: Bjorn Andersson Subject: Re: [PATCH v2 6/9] arm64: dts: qcom: msm8996: Add PSCI cpuidle low power states Date: Tue, 21 May 2019 20:49:53 -0700 Message-ID: <20190522034953.GM3137@builder> References: <2ffbb3f32484c03360ff7d6fa4668581ef298c9e.1558430617.git.amit.kucheria@linaro.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <2ffbb3f32484c03360ff7d6fa4668581ef298c9e.1558430617.git.amit.kucheria@linaro.org> Sender: linux-kernel-owner@vger.kernel.org To: Amit Kucheria Cc: linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, agross@kernel.org, niklas.cassel@linaro.org, marc.w.gonzalez@free.fr, sibis@codeaurora.org, daniel.lezcano@linaro.org, Andy Gross , David Brown , Li Yang , Shawn Guo , devicetree@vger.kernel.org List-Id: devicetree@vger.kernel.org On Tue 21 May 02:35 PDT 2019, Amit Kucheria wrote: > Add device bindings for cpuidle states for cpu devices. > > msm8996 features 4 cpus - 2 in each cluster. However, all cpus implement > the same microarchitecture and the two clusters only differ in the > maximum frequency attainable by the CPUs. > > Signed-off-by: Amit Kucheria Applied Regards, Bjorn > --- > arch/arm64/boot/dts/qcom/msm8996.dtsi | 17 +++++++++++++++++ > 1 file changed, 17 insertions(+) > > diff --git a/arch/arm64/boot/dts/qcom/msm8996.dtsi b/arch/arm64/boot/dts/qcom/msm8996.dtsi > index c761269caf80..4f2fb7885f39 100644 > --- a/arch/arm64/boot/dts/qcom/msm8996.dtsi > +++ b/arch/arm64/boot/dts/qcom/msm8996.dtsi > @@ -95,6 +95,7 @@ > compatible = "qcom,kryo"; > reg = <0x0 0x0>; > enable-method = "psci"; > + cpu-idle-states = <&CPU_SLEEP_0>; > next-level-cache = <&L2_0>; > L2_0: l2-cache { > compatible = "cache"; > @@ -107,6 +108,7 @@ > compatible = "qcom,kryo"; > reg = <0x0 0x1>; > enable-method = "psci"; > + cpu-idle-states = <&CPU_SLEEP_0>; > next-level-cache = <&L2_0>; > }; > > @@ -115,6 +117,7 @@ > compatible = "qcom,kryo"; > reg = <0x0 0x100>; > enable-method = "psci"; > + cpu-idle-states = <&CPU_SLEEP_0>; > next-level-cache = <&L2_1>; > L2_1: l2-cache { > compatible = "cache"; > @@ -127,6 +130,7 @@ > compatible = "qcom,kryo"; > reg = <0x0 0x101>; > enable-method = "psci"; > + cpu-idle-states = <&CPU_SLEEP_0>; > next-level-cache = <&L2_1>; > }; > > @@ -151,6 +155,19 @@ > }; > }; > }; > + > + idle-states { > + entry-method = "psci"; > + > + CPU_SLEEP_0: cpu-sleep-0 { > + compatible = "arm,idle-state"; > + idle-state-name = "standalone-power-collapse"; > + arm,psci-suspend-param = <0x00000004>; > + entry-latency-us = <40>; > + exit-latency-us = <80>; > + min-residency-us = <300>; > + }; > + }; > }; > > thermal-zones { > -- > 2.17.1 >