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Subject[PATCH v3] ARM: dts: mt8173: support arm64 cpuidle-dt
Date
This patch adds an idle-states node to describe the mt8173 idle states and
also adds references to the idle-states node in all CPU nodes.

Signed-off-by: Howard Chen <howard.chen@linaro.org>
---
arch/arm64/boot/dts/mediatek/mt8173.dtsi | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)

diff --git a/arch/arm64/boot/dts/mediatek/mt8173.dtsi b/arch/arm64/boot/dts/mediatek/mt8173.dtsi
index 924fdb6..47e8d56 100644
--- a/arch/arm64/boot/dts/mediatek/mt8173.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8173.dtsi
@@ -49,6 +49,8 @@
device_type = "cpu";
compatible = "arm,cortex-a53";
reg = <0x000>;
+ enable-method = "psci";
+ cpu-idle-states = <&CPU_SLEEP_0>;
};

cpu1: cpu@1 {
@@ -56,6 +58,7 @@
compatible = "arm,cortex-a53";
reg = <0x001>;
enable-method = "psci";
+ cpu-idle-states = <&CPU_SLEEP_0>;
};

cpu2: cpu@100 {
@@ -63,6 +66,7 @@
compatible = "arm,cortex-a57";
reg = <0x100>;
enable-method = "psci";
+ cpu-idle-states = <&CPU_SLEEP_0>;
};

cpu3: cpu@101 {
@@ -70,6 +74,20 @@
compatible = "arm,cortex-a57";
reg = <0x101>;
enable-method = "psci";
+ cpu-idle-states = <&CPU_SLEEP_0>;
+ };
+
+ idle-states {
+ entry-method = "arm,psci";
+
+ CPU_SLEEP_0: cpu-sleep-0 {
+ compatible = "arm,idle-state";
+ arm,psci-suspend-param = <0x0010000>;
+ entry-latency-us = <639>;
+ exit-latency-us = <680>;
+ min-residency-us = <1088>;
+ local-timer-stop;
+ };
};
};

--
1.9.1


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