linux-kernel - [PATCH] arm64: dts: qcom: qcs404: Add PSCI cpuidle support

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Date:   Mon,  6 May 2019 21:31:15 +0200
From:   Niklas Cassel <niklas.cassel@...aro.org>
To:     Andy Gross <agross@...nel.org>,
        David Brown <david.brown@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>
Cc:     amit.kucheria@...aro.org, jorge.ramirez-ortiz@...aro.org,
        lina.iyer@...aro.org, ulf.hansson@...aro.org,
        bjorn.andersson@...aro.org,
        Niklas Cassel <niklas.cassel@...aro.org>,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] arm64: dts: qcom: qcs404: Add PSCI cpuidle support

Add device bindings for CPUs to suspend using PSCI as the enable-method.

Signed-off-by: Niklas Cassel <niklas.cassel@...aro.org>
---
 arch/arm64/boot/dts/qcom/qcs404.dtsi | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/qcs404.dtsi b/arch/arm64/boot/dts/qcom/qcs404.dtsi
index ffedf9640af7..f9db9f3ee10c 100644
--- a/arch/arm64/boot/dts/qcom/qcs404.dtsi
+++ b/arch/arm64/boot/dts/qcom/qcs404.dtsi
@@ -31,6 +31,7 @@
 			reg = <0x100>;
 			enable-method = "psci";
 			next-level-cache = <&L2_0>;
+			cpu-idle-states = <&CPU_PC>;
 		};
 
 		CPU1: cpu@101 {
@@ -39,6 +40,7 @@
 			reg = <0x101>;
 			enable-method = "psci";
 			next-level-cache = <&L2_0>;
+			cpu-idle-states = <&CPU_PC>;
 		};
 
 		CPU2: cpu@102 {
@@ -47,6 +49,7 @@
 			reg = <0x102>;
 			enable-method = "psci";
 			next-level-cache = <&L2_0>;
+			cpu-idle-states = <&CPU_PC>;
 		};
 
 		CPU3: cpu@103 {
@@ -55,12 +58,24 @@
 			reg = <0x103>;
 			enable-method = "psci";
 			next-level-cache = <&L2_0>;
+			cpu-idle-states = <&CPU_PC>;
 		};
 
 		L2_0: l2-cache {
 			compatible = "cache";
 			cache-level = <2>;
 		};
+
+		idle-states {
+			CPU_PC: pc {
+				compatible = "arm,idle-state";
+				arm,psci-suspend-param = <0x40000003>;
+				entry-latency-us = <125>;
+				exit-latency-us = <180>;
+				min-residency-us = <595>;
+				local-timer-stop;
+			};
+		};
 	};
 
 	firmware {
-- 
2.21.0