linux-kernel - [PATCH v1 5/5] arm64: dts: tegra194: Add CPU idle states

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Message-ID: <1614838092-30398-6-git-send-email-skomatineni@nvidia.com>
Date:   Wed, 3 Mar 2021 22:08:12 -0800
From:   Sowjanya Komatineni <skomatineni@...dia.com>
To:     <thierry.reding@...il.com>, <jonathanh@...dia.com>,
        <skomatineni@...dia.com>, <daniel.lezcano@...aro.org>,
        <robh+dt@...nel.org>
CC:     <ksitaraman@...dia.com>, <sanjayc@...dia.com>,
        <linux-tegra@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-pm@...r.kernel.org>, <devicetree@...r.kernel.org>
Subject: [PATCH v1 5/5] arm64: dts: tegra194: Add CPU idle states

This patch adds CPU core and cluster idle states to Tegra194
device tree

Signed-off-by: Sowjanya Komatineni <skomatineni@...dia.com>
---
 arch/arm64/boot/dts/nvidia/tegra194.dtsi | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/arch/arm64/boot/dts/nvidia/tegra194.dtsi b/arch/arm64/boot/dts/nvidia/tegra194.dtsi
index 9449156..f9c2731 100644
--- a/arch/arm64/boot/dts/nvidia/tegra194.dtsi
+++ b/arch/arm64/boot/dts/nvidia/tegra194.dtsi
@@ -2155,12 +2155,14 @@
 		nvidia,bpmp = <&bpmp>;
 		#address-cells = <1>;
 		#size-cells = <0>;
+		cluster-deepest-power-state = <0x6>;
 
 		cpu0_0: cpu@0 {
 			compatible = "nvidia,tegra194-carmel";
 			device_type = "cpu";
 			reg = <0x000>;
 			enable-method = "psci";
+			cpu-idle-states = <&C6>;
 			i-cache-size = <131072>;
 			i-cache-line-size = <64>;
 			i-cache-sets = <512>;
@@ -2175,6 +2177,7 @@
 			device_type = "cpu";
 			reg = <0x001>;
 			enable-method = "psci";
+			cpu-idle-states = <&C6>;
 			i-cache-size = <131072>;
 			i-cache-line-size = <64>;
 			i-cache-sets = <512>;
@@ -2189,6 +2192,7 @@
 			device_type = "cpu";
 			reg = <0x100>;
 			enable-method = "psci";
+			cpu-idle-states = <&C6>;
 			i-cache-size = <131072>;
 			i-cache-line-size = <64>;
 			i-cache-sets = <512>;
@@ -2203,6 +2207,7 @@
 			device_type = "cpu";
 			reg = <0x101>;
 			enable-method = "psci";
+			cpu-idle-states = <&C6>;
 			i-cache-size = <131072>;
 			i-cache-line-size = <64>;
 			i-cache-sets = <512>;
@@ -2217,6 +2222,7 @@
 			device_type = "cpu";
 			reg = <0x200>;
 			enable-method = "psci";
+			cpu-idle-states = <&C6>;
 			i-cache-size = <131072>;
 			i-cache-line-size = <64>;
 			i-cache-sets = <512>;
@@ -2231,6 +2237,7 @@
 			device_type = "cpu";
 			reg = <0x201>;
 			enable-method = "psci";
+			cpu-idle-states = <&C6>;
 			i-cache-size = <131072>;
 			i-cache-line-size = <64>;
 			i-cache-sets = <512>;
@@ -2245,6 +2252,7 @@
 			device_type = "cpu";
 			reg = <0x300>;
 			enable-method = "psci";
+			cpu-idle-states = <&C6>;
 			i-cache-size = <131072>;
 			i-cache-line-size = <64>;
 			i-cache-sets = <512>;
@@ -2259,6 +2267,7 @@
 			device_type = "cpu";
 			reg = <0x301>;
 			enable-method = "psci";
+			cpu-idle-states = <&C6>;
 			i-cache-size = <131072>;
 			i-cache-line-size = <64>;
 			i-cache-sets = <512>;
@@ -2343,12 +2352,31 @@
 			cache-line-size = <64>;
 			cache-sets = <4096>;
 		};
+
+		cpu_core_power_states {
+			C6: c6 {
+				compatible = "nvidia,tegra194-cpuidle-core";
+				idle-state-name = "CPU powergated, state retained";
+				wakeup-latency-us = <2000>;
+				min-residency-us = <30000>;
+				arm,psci-suspend-param = <0x6>;
+				status = "okay";
+			};
+		};
+
+		cpu_crossover_thresholds {
+			thresholds {
+				crossover_c1_c6 = <30000>;
+				crossover_cc1_cc6 = <80000>;
+			};
+		};
 	};
 
 	psci {
 		compatible = "arm,psci-1.0";
 		status = "okay";
 		method = "smc";
+		cpu_suspend = <0xC4000001>;
 	};
 
 	sound {
-- 
2.7.4