From: Stefan Krsmanovic <stefan.krsmanovic@xxxxxxxxxx>
Added the idle-states node to describe zynqmp idle states. Only
cpu-sleep-0 idle state is added in this patch. References to the
idle-states node are added in all CPU nodes. Time values: entry/exit
latencies and min-residency, needs to be tuned. arm,psci-suspend-param
is selected to comply with PSCIv1.0 and Extended StateID format.
Signed-off-by: Stefan Krsmanovic <stefan.krsmanovic@xxxxxxxxxx>
Acked-by: Will Wong <willw@xxxxxxxxxx>
Signed-off-by: Michal Simek <michal.simek@xxxxxxxxxx>
---
arch/arm64/boot/dts/xilinx/zynqmp.dtsi | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
diff --git a/arch/arm64/boot/dts/xilinx/zynqmp.dtsi b/arch/arm64/boot/dts/xilinx/zynqmp.dtsi
index 4f7d9905e235..8e6cf0cf3a69 100644
--- a/arch/arm64/boot/dts/xilinx/zynqmp.dtsi
+++ b/arch/arm64/boot/dts/xilinx/zynqmp.dtsi
@@ -25,6 +25,7 @@
device_type = "cpu";
enable-method = "psci";
reg = <0x0>;
+ cpu-idle-states = <&CPU_SLEEP_0>;
};
cpu1: cpu@1 {
@@ -32,6 +33,7 @@
device_type = "cpu";
enable-method = "psci";
reg = <0x1>;
+ cpu-idle-states = <&CPU_SLEEP_0>;
};
cpu2: cpu@2 {
@@ -39,6 +41,7 @@
device_type = "cpu";
enable-method = "psci";
reg = <0x2>;
+ cpu-idle-states = <&CPU_SLEEP_0>;
};
cpu3: cpu@3 {
@@ -46,6 +49,20 @@
device_type = "cpu";
enable-method = "psci";
reg = <0x3>;
+ 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 = <0x40000000>;
+ local-timer-stop;
+ entry-latency-us = <300>;
+ exit-latency-us = <600>;
+ min-residency-us = <10000>;
+ };
};
};
--
1.9.1
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