linux-kernel - [PATCH v8 10/10] arm64: dts: mediatek: Add CPU Idle support

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Date:   Thu, 25 May 2023 10:33:19 +0200
From:   amergnat@...libre.com
To:     Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Wim Van Sebroeck <wim@...ux-watchdog.org>,
        Guenter Roeck <linux@...ck-us.net>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        Conor Dooley <conor+dt@...nel.org>
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-watchdog@...r.kernel.org, devicetree@...r.kernel.org,
        linux-mediatek@...ts.infradead.org,
        Alexandre Mergnat <amergnat@...libre.com>,
        Amjad Ouled-Ameur <aouledameur@...libre.com>,
        Kevin Hilman <khilman@...libre.com>
Subject: [PATCH v8 10/10] arm64: dts: mediatek: Add CPU Idle support

From: Amjad Ouled-Ameur <aouledameur@...libre.com>

MT8365 has 3 CPU Idle states:
- MCDI_CPU. (Multi-Core-Deep-Idle)
- MCDI_CLUSTER.
- DPIDLE. (Deep-Idle)

Signed-off-by: Amjad Ouled-Ameur <aouledameur@...libre.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
Tested-by: Kevin Hilman <khilman@...libre.com>
Signed-off-by: Alexandre Mergnat <amergnat@...libre.com>
---
 arch/arm64/boot/dts/mediatek/mt8365.dtsi | 35 ++++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)

diff --git a/arch/arm64/boot/dts/mediatek/mt8365.dtsi b/arch/arm64/boot/dts/mediatek/mt8365.dtsi
index cfe0c67ad61f..413496c92069 100644
--- a/arch/arm64/boot/dts/mediatek/mt8365.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8365.dtsi
@@ -128,6 +128,7 @@ cpu0: cpu@0 {
 			reg = <0x0>;
 			#cooling-cells = <2>;
 			enable-method = "psci";
+			cpu-idle-states = <&CPU_MCDI &CLUSTER_MCDI &CLUSTER_DPIDLE>;
 			i-cache-size = <0x8000>;
 			i-cache-line-size = <64>;
 			i-cache-sets = <256>;
@@ -147,6 +148,7 @@ cpu1: cpu@1 {
 			reg = <0x1>;
 			#cooling-cells = <2>;
 			enable-method = "psci";
+			cpu-idle-states = <&CPU_MCDI &CLUSTER_MCDI &CLUSTER_DPIDLE>;
 			i-cache-size = <0x8000>;
 			i-cache-line-size = <64>;
 			i-cache-sets = <256>;
@@ -166,6 +168,7 @@ cpu2: cpu@2 {
 			reg = <0x2>;
 			#cooling-cells = <2>;
 			enable-method = "psci";
+			cpu-idle-states = <&CPU_MCDI &CLUSTER_MCDI &CLUSTER_DPIDLE>;
 			i-cache-size = <0x8000>;
 			i-cache-line-size = <64>;
 			i-cache-sets = <256>;
@@ -185,6 +188,7 @@ cpu3: cpu@3 {
 			reg = <0x3>;
 			#cooling-cells = <2>;
 			enable-method = "psci";
+			cpu-idle-states = <&CPU_MCDI &CLUSTER_MCDI &CLUSTER_DPIDLE>;
 			i-cache-size = <0x8000>;
 			i-cache-line-size = <64>;
 			i-cache-sets = <256>;
@@ -198,6 +202,37 @@ cpu3: cpu@3 {
 			operating-points-v2 = <&cluster0_opp>;
 		};
 
+		idle-states {
+			entry-method = "psci";
+
+			CPU_MCDI: cpu-mcdi {
+				compatible = "arm,idle-state";
+				local-timer-stop;
+				arm,psci-suspend-param = <0x00010001>;
+				entry-latency-us = <300>;
+				exit-latency-us = <200>;
+				min-residency-us = <1000>;
+			};
+
+			CLUSTER_MCDI: cluster-mcdi {
+				compatible = "arm,idle-state";
+				local-timer-stop;
+				arm,psci-suspend-param = <0x01010001>;
+				entry-latency-us = <350>;
+				exit-latency-us = <250>;
+				min-residency-us = <1200>;
+			};
+
+			CLUSTER_DPIDLE: cluster-dpidle {
+				compatible = "arm,idle-state";
+				local-timer-stop;
+				arm,psci-suspend-param = <0x01010004>;
+				entry-latency-us = <300>;
+				exit-latency-us = <800>;
+				min-residency-us = <3300>;
+			};
+		};
+
 		l2: l2-cache {
 			compatible = "cache";
 			cache-level = <2>;

-- 
2.25.1