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Date: Tue, 22 Dec 2020 12:58:20 +0800
From: James Liao <jamesjj.liao@...iatek.com>
To: Rob Herring <robh+dt@...nel.org>,
Matthias Brugger <matthias.bgg@...il.com>
CC: <devicetree@...r.kernel.org>,
<linux-arm-kernel@...ts.infradead.org>,
<linux-mediatek@...ts.infradead.org>,
<linux-kernel@...r.kernel.org>, <srv_heupstream@...iatek.com>,
James Liao <jamesjj.liao@...iatek.com>
Subject: [PATCH] arm64: dts: mt8192: Add cpu-idle-states
Add idle states for cpu-off and cluster-off.
Signed-off-by: James Liao <jamesjj.liao@...iatek.com>
---
arch/arm64/boot/dts/mediatek/mt8192.dtsi | 44 ++++++++++++++++++++++++
1 file changed, 44 insertions(+)
This patch bases on v5.10 and [1], adds idle-states for MT8192 CPUs.
[1] https://lore.kernel.org/linux-arm-kernel/20201030092207.26488-2-seiya.wang@mediatek.com/
diff --git a/arch/arm64/boot/dts/mediatek/mt8192.dtsi b/arch/arm64/boot/dts/mediatek/mt8192.dtsi
index e12e024de122..c7f2ec9ea4f1 100644
--- a/arch/arm64/boot/dts/mediatek/mt8192.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8192.dtsi
@@ -39,6 +39,7 @@
reg = <0x000>;
enable-method = "psci";
clock-frequency = <1701000000>;
+ cpu-idle-states = <&cpuoff_l &clusteroff_l>;
next-level-cache = <&l2_0>;
capacity-dmips-mhz = <530>;
};
@@ -49,6 +50,7 @@
reg = <0x100>;
enable-method = "psci";
clock-frequency = <1701000000>;
+ cpu-idle-states = <&cpuoff_l &clusteroff_l>;
next-level-cache = <&l2_0>;
capacity-dmips-mhz = <530>;
};
@@ -59,6 +61,7 @@
reg = <0x200>;
enable-method = "psci";
clock-frequency = <1701000000>;
+ cpu-idle-states = <&cpuoff_l &clusteroff_l>;
next-level-cache = <&l2_0>;
capacity-dmips-mhz = <530>;
};
@@ -69,6 +72,7 @@
reg = <0x300>;
enable-method = "psci";
clock-frequency = <1701000000>;
+ cpu-idle-states = <&cpuoff_l &clusteroff_l>;
next-level-cache = <&l2_0>;
capacity-dmips-mhz = <530>;
};
@@ -79,6 +83,7 @@
reg = <0x400>;
enable-method = "psci";
clock-frequency = <2171000000>;
+ cpu-idle-states = <&cpuoff_b &clusteroff_b>;
next-level-cache = <&l2_1>;
capacity-dmips-mhz = <1024>;
};
@@ -89,6 +94,7 @@
reg = <0x500>;
enable-method = "psci";
clock-frequency = <2171000000>;
+ cpu-idle-states = <&cpuoff_b &clusteroff_b>;
next-level-cache = <&l2_1>;
capacity-dmips-mhz = <1024>;
};
@@ -99,6 +105,7 @@
reg = <0x600>;
enable-method = "psci";
clock-frequency = <2171000000>;
+ cpu-idle-states = <&cpuoff_b &clusteroff_b>;
next-level-cache = <&l2_1>;
capacity-dmips-mhz = <1024>;
};
@@ -109,6 +116,7 @@
reg = <0x700>;
enable-method = "psci";
clock-frequency = <2171000000>;
+ cpu-idle-states = <&cpuoff_b &clusteroff_b>;
next-level-cache = <&l2_1>;
capacity-dmips-mhz = <1024>;
};
@@ -158,6 +166,42 @@
l3_0: l3-cache {
compatible = "cache";
};
+
+ idle-states {
+ entry-method = "arm,psci";
+ cpuoff_l: cpuoff_l {
+ compatible = "arm,idle-state";
+ arm,psci-suspend-param = <0x00010001>;
+ local-timer-stop;
+ entry-latency-us = <55>;
+ exit-latency-us = <140>;
+ min-residency-us = <780>;
+ };
+ cpuoff_b: cpuoff_b {
+ compatible = "arm,idle-state";
+ arm,psci-suspend-param = <0x00010001>;
+ local-timer-stop;
+ entry-latency-us = <35>;
+ exit-latency-us = <145>;
+ min-residency-us = <720>;
+ };
+ clusteroff_l: clusteroff_l {
+ compatible = "arm,idle-state";
+ arm,psci-suspend-param = <0x01010002>;
+ local-timer-stop;
+ entry-latency-us = <60>;
+ exit-latency-us = <155>;
+ min-residency-us = <860>;
+ };
+ clusteroff_b: clusteroff_b {
+ compatible = "arm,idle-state";
+ arm,psci-suspend-param = <0x01010002>;
+ local-timer-stop;
+ entry-latency-us = <40>;
+ exit-latency-us = <155>;
+ min-residency-us = <780>;
+ };
+ };
};
pmu-a55 {
--
2.18.0
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