linux-kernel - [PATCH v2] arm64: dts: mt8183: Enable CPU idle-states

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Date:   Tue, 14 Jan 2020 18:11:13 +0800
From:   James Liao <jamesjj.liao@...iatek.com>
To:     Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Matthias Brugger <matthias.bgg@...il.com>
CC:     <devicetree@...r.kernel.org>, <srv_heupstream@...iatek.com>,
        <linux-mediatek@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        James Liao <jamesjj.liao@...iatek.com>
Subject: [PATCH v2] arm64: dts: mt8183: Enable CPU idle-states

Enable mcdi-cpu and mcdi-cluster on MT8183 CPUs.

Signed-off-by: James Liao <jamesjj.liao@...iatek.com>
---
This patch bases on v5.5-rc6, adds idle-states for MT8183 CPUs.

 arch/arm64/boot/dts/mediatek/mt8183.dtsi | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/arch/arm64/boot/dts/mediatek/mt8183.dtsi b/arch/arm64/boot/dts/mediatek/mt8183.dtsi
index 10b3247..a022325 100644
--- a/arch/arm64/boot/dts/mediatek/mt8183.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8183.dtsi
@@ -73,6 +73,7 @@
 			reg = <0x000>;
 			enable-method = "psci";
 			capacity-dmips-mhz = <741>;
+			cpu-idle-states = <&MCDI_CPU &MCDI_CLUSTER>;
 		};
 
 		cpu1: cpu@1 {
@@ -81,6 +82,7 @@
 			reg = <0x001>;
 			enable-method = "psci";
 			capacity-dmips-mhz = <741>;
+			cpu-idle-states = <&MCDI_CPU &MCDI_CLUSTER>;
 		};
 
 		cpu2: cpu@2 {
@@ -89,6 +91,7 @@
 			reg = <0x002>;
 			enable-method = "psci";
 			capacity-dmips-mhz = <741>;
+			cpu-idle-states = <&MCDI_CPU &MCDI_CLUSTER>;
 		};
 
 		cpu3: cpu@3 {
@@ -97,6 +100,7 @@
 			reg = <0x003>;
 			enable-method = "psci";
 			capacity-dmips-mhz = <741>;
+			cpu-idle-states = <&MCDI_CPU &MCDI_CLUSTER>;
 		};
 
 		cpu4: cpu@100 {
@@ -105,6 +109,7 @@
 			reg = <0x100>;
 			enable-method = "psci";
 			capacity-dmips-mhz = <1024>;
+			cpu-idle-states = <&MCDI_CPU &MCDI_CLUSTER>;
 		};
 
 		cpu5: cpu@101 {
@@ -113,6 +118,7 @@
 			reg = <0x101>;
 			enable-method = "psci";
 			capacity-dmips-mhz = <1024>;
+			cpu-idle-states = <&MCDI_CPU &MCDI_CLUSTER>;
 		};
 
 		cpu6: cpu@102 {
@@ -121,6 +127,7 @@
 			reg = <0x102>;
 			enable-method = "psci";
 			capacity-dmips-mhz = <1024>;
+			cpu-idle-states = <&MCDI_CPU &MCDI_CLUSTER>;
 		};
 
 		cpu7: cpu@103 {
@@ -129,6 +136,29 @@
 			reg = <0x103>;
 			enable-method = "psci";
 			capacity-dmips-mhz = <1024>;
+			cpu-idle-states = <&MCDI_CPU &MCDI_CLUSTER>;
+		};
+
+		idle-states {
+			entry-method = "arm,psci";
+
+			MCDI_CPU: mcdi-cpu {
+				compatible = "arm,idle-state";
+				local-timer-stop;
+				arm,psci-suspend-param = <0x00010001>;
+				entry-latency-us = <200>;
+				exit-latency-us = <200>;
+				min-residency-us = <800>;
+			};
+
+			MCDI_CLUSTER: mcdi-cluster {
+				compatible = "arm,idle-state";
+				local-timer-stop;
+				arm,psci-suspend-param = <0x01010001>;
+				entry-latency-us = <250>;
+				exit-latency-us = <400>;
+				min-residency-us = <1300>;
+			};
 		};
 	};
 
-- 
1.9.1